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Teng Z, Chen C, He Y, Pan S, Liu D, Zhu L, Liang K, Li Y, Huang L. Melatonin confers thermotolerance and antioxidant capacity in Chinese cabbage. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 212:108736. [PMID: 38797006 DOI: 10.1016/j.plaphy.2024.108736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 05/15/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024]
Abstract
Due to the damaging effect of high temperatures on plant development, global warming is predicted to increase agricultural risks. Chinese cabbage holds considerable importance as a leafy vegetable that is extensively consumed and cultivated worldwide. Its year-round production also encounters severe challenges in the face of high temperatures. In this study, melatonin (MT), a pivotal multifunctional signaling molecule that coordinates responses to diverse environmental stressors was used to mitigate the harmful effects of high temperatures on Chinese cabbage. Through the utilization of growth indices, cytological morphology, physiological and biochemical responses, and RNA-Seq analysis, alongside an examination of the influence of crucial enzymes in the endogenous MT synthesis pathway on the thermotolerance of Chinese cabbage, we revealed that MT pretreatment enhanced photosynthetic activity, maintained signaling pathways associated with endoplasmic reticulum protein processing, and preserved circadian rhythm in Chinese cabbage under high temperatures. Furthermore, pretreatment with MT resulted in increased levels of soluble sugar, vitamin C, proteins, and antioxidant enzyme activity, along with decreased levels of malondialdehyde, nitrate, flavonoids, and bitter glucosinolates, ultimately enhancing the capacity of the organism to mitigate oxidative stress. The knockdown of the tryptophan decarboxylase gene, which encodes a key enzyme responsible for MT biosynthesis, resulted in a significant decline in the ability of transgenic Chinese cabbage to alleviate oxidative damage under high temperatures, further indicating an important role of MT in establishing the thermotolerance. Taken together, these results provide a mechanism for MT to improve the antioxidant capacity of Chinese cabbage under high temperatures and suggest beneficial implications for the management of other plants subjected to global warming.
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Affiliation(s)
- Zhiyan Teng
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China
| | - Caizhi Chen
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China; Hainan Institute of Zhejiang University, Sanya, 572024, China
| | - Yuanrong He
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China; Hainan Institute of Zhejiang University, Sanya, 572024, China
| | - Shihui Pan
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China
| | - Dandan Liu
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China; Hainan Institute of Zhejiang University, Sanya, 572024, China
| | - Luyu Zhu
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China
| | - Kexin Liang
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China
| | - Yufei Li
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China
| | - Li Huang
- Laboratory of Cell & Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China; Hainan Institute of Zhejiang University, Sanya, 572024, China.
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Li X, Zhang W, Niu D, Liu X. Effects of abiotic stress on chlorophyll metabolism. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 342:112030. [PMID: 38346561 DOI: 10.1016/j.plantsci.2024.112030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/08/2024] [Indexed: 02/22/2024]
Abstract
Chlorophyll, an essential pigment in the photosynthetic machinery of plants, plays a pivotal role in the absorption of light energy and its subsequent transfer to reaction centers. Given that the global production of chlorophyll reaches billions of tons annually, a comprehensive understanding of its biosynthetic pathways and regulatory mechanisms is important. The metabolic pathways governing chlorophyll biosynthesis and catabolism are complex, encompassing a series of interconnected reactions mediated by a spectrum of enzymes. Environmental fluctuations, particularly abiotic stressors such as drought, extreme temperature variations, and excessive light exposure, can significantly perturb these processes. Such disruptions in chlorophyll metabolism have profound implications for plant growth and development. This review delves into the core aspects of chlorophyll metabolism, encompassing both biosynthetic and degradative pathways. It elucidates key genes and enzymes instrumental in these processes and underscores the impact of abiotic stress on chlorophyll metabolism. Furthermore, the review aims to deepen the understanding of the interplay between chlorophyll metabolic dynamics and stress responses, thereby shedding light on potential regulatory mechanisms.
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Affiliation(s)
- Xu Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Wei Zhang
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Di Niu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Xiaomin Liu
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
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3
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Tian Z, Zhao M, Wang J, Yang Q, Ma Y, Yang X, Ma L, Qi Y, Li J, Quinet M, Shi B, Meng Y. Exogenous melatonin improves germination rate in buckwheat under high temperature stress by regulating seed physiological and biochemical characteristics. PeerJ 2024; 12:e17136. [PMID: 38590707 PMCID: PMC11000643 DOI: 10.7717/peerj.17136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/28/2024] [Indexed: 04/10/2024] Open
Abstract
The germinations of three common buckwheat (Fagopyrum esculentum) varieties and two Tartary buckwheat (Fagopyrum tataricum) varieties seeds are known to be affected by high temperature. However, little is known about the physiological mechanism affecting germination and the effect of melatonin (MT) on buckwheat seed germination under high temperature. This work studied the effects of exogenous MT on buckwheat seed germination under high temperature. MT was sprayed. The parameters, including growth, and physiological factors, were examined. The results showed that exogenous MT significantly increased the germination rate (GR), germination potential (GP), radicle length (RL), and fresh weight (FW) of these buckwheat seeds under high-temperature stress and enhanced the content of osmotic adjustment substances and enzyme activity. Comprehensive analysis revealed that under high-temperature stress during germination, antioxidant enzymes play a predominant role, while osmotic adjustment substances work synergistically to reduce the extent of damage to the membrane structure, serving as the primary key indicators for studying high-temperature resistance. Consequently, our results showed that MT had a positive protective effect on buckwheat seeds exposed to high temperature stress, providing a theoretical basis for improving the ability to adapt to high temperature environments.
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Affiliation(s)
- Zemiao Tian
- Hebei Agricultrual University, Baoding, China
- Chinese Academy of Agricultural Sciences, Institute of Crop Sciences, Beijing, China
| | - Mengyu Zhao
- Chinese Academy of Agricultural Sciences, Institute of Crop Sciences, Beijing, China
| | - Junzhen Wang
- Liangshan Yi Autonomous Prefecture Academy of Agricultural Sciences, Xichang, China
| | - Qian Yang
- Hebei Agricultrual University, Baoding, China
| | - Yini Ma
- Hebei Agricultrual University, Baoding, China
| | - Xinlei Yang
- Hebei Agricultrual University, Baoding, China
| | - Luping Ma
- Hebei Agricultrual University, Baoding, China
| | - Yongzhi Qi
- Hebei Agricultrual University, Baoding, China
| | - Jinbo Li
- Luoyang Normal University, Luoyang, China
| | - Muriel Quinet
- Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | - Yu Meng
- Hebei Agricultrual University, Baoding, China
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Qiao M, Lv S, Qiao Y, Lin W, Gao Z, Tang X, Yang Z, Chen J. Exogenous Streptomyces spp. enhance the drought resistance of naked oat ( Avena nuda) seedlings by augmenting both the osmoregulation mechanisms and antioxidant capacities. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:FP23312. [PMID: 38588711 DOI: 10.1071/fp23312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 03/22/2024] [Indexed: 04/10/2024]
Abstract
Drought is a major obstacle to the development of naked oat industry. This work investigated mechanisms by which exogenous Streptomyces albidoflavus T4 and Streptomyces rochei D74 improved drought tolerance in naked oat (Avena nuda ) seedlings. Results showed that in the seed germination experiment, germination rate, radicle and hypocotyl length of naked oat seeds treated with the fermentation filtrate of T4 or D74 under PEG induced drought stress increased significantly. In the hydroponic experiment, the shoot and root dry weights of oat seedlings increased significantly when treated with the T4 or D74 fermentation filtrate under the 15% PEG induced drought stress (S15). Simultaneously, the T4 treatment also significantly increased the surface area, volume, the number of tips and the root activity of oat seedlings. Both T4 and D74 treatments elicited significant increases in proline and soluble sugar contents, as well as the catalase and peroxidase activities in oat seedlings. The results of comprehensive drought resistance capacity (CDRC) calculation of oat plants showed that the drought resistance of oat seedlings under the T4 treatment was better than that under the D74 treatment, and the effect was better under higher drought stress (S15). Findings of this study may provide a novel and effective approach for enhancing plant defenses against drought stress.
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Affiliation(s)
- Meixia Qiao
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Siyuan Lv
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China
| | - Yuejing Qiao
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China; and Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu, Shanxi 030801, China
| | - Wen Lin
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China; and Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu, Shanxi 030801, China
| | - Zhiqiang Gao
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China; and Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu, Shanxi 030801, China
| | - Xiwang Tang
- Hebei Key Laboratory of Agroecological Safety, Hebei University of Environmental Engineering, Qinhuangdao, Hebei 066102, China
| | - Zhenping Yang
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China; and Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu, Shanxi 030801, China
| | - Jie Chen
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi 030801, China; and Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau, Taigu, Shanxi 030801, China
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Ameen M, Zafar A, Mahmood A, Zia MA, Kamran K, Javaid MM, Yasin M, Khan BA. Melatonin as a master regulatory hormone for genetic responses to biotic and abiotic stresses in model plant Arabidopsis thaliana: a comprehensive review. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:FP23248. [PMID: 38310885 DOI: 10.1071/fp23248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 01/09/2024] [Indexed: 02/06/2024]
Abstract
Melatonin is a naturally occurring biologically active amine produced by plants, animals and microbes. This review explores the biosynthesis of melatonin in plants, with a particular focus on its diverse roles in Arabidopsis thaliana , a model species. Melatonin affects abiotic and biotic stress resistance in A. thaliana . Exogenous and endogenous melatonin is addressed in association with various conditions, including cold stress, high light stress, intense heat and infection with Botrytis cinerea or Pseudomonas , as well as in seed germination and lateral root formation. Furthermore, melatonin confers stress resistance in Arabidopsis by initiating the antioxidant system, remedying photosynthesis suppression, regulating transcription factors involved with stress resistance (CBF, DREB, ZAT, CAMTA, WRKY33, MYC2, TGA) and other stress-related hormones (abscisic acid, auxin, ethylene, jasmonic acid and salicylic acid). This article additionally addresses other precursors, metabolic components, expression of genes (COR , CBF , SNAT , ASMT , PIN , PR1 , PDF1.2 and HSFA ) and proteins (JAZ, NPR1) associated with melatonin and reducing both biological and environmental stressors. Furthermore, the future perspective of melatonin rich agri-crops is explored to enhance plant tolerance to abiotic and biotic stresses, maximise crop productivity and enhance nutritional worth, which may help improve food security.
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Affiliation(s)
- Muaz Ameen
- Department of Botany, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Asma Zafar
- Department of Botany, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Athar Mahmood
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Muhammad Anjum Zia
- Department of Biochemistry, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Kashif Kamran
- Department of Physics, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan
| | - Muhammad Mansoor Javaid
- Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan
| | - Muhammad Yasin
- Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan
| | - Bilal Ahmad Khan
- Department of Agronomy, College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan
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Talaat NB. Drought Stress Alleviator Melatonin Reconfigures Water-Stressed Barley ( Hordeum vulgare L.) Plants' Photosynthetic Efficiency, Antioxidant Capacity, and Endogenous Phytohormone Profile. Int J Mol Sci 2023; 24:16228. [PMID: 38003420 PMCID: PMC10671378 DOI: 10.3390/ijms242216228] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
The production of crops is severely limited by water scarcity. We still do not fully understand the underlying mechanism of exogenous melatonin (MT)-mediated water stress tolerance in barley. This study is the first of its kind to show how MT can potentially mitigate changes in barley's physio-biochemical parameters caused by water deficiency. Barley was grown under three irrigation levels (100%, 70%, and 30% of field capacity) and was foliar sprayed with 70 μM MT. The results showed that exogenously applied MT protected the photosynthetic apparatus by improving photosynthetic pigment content, photochemical reactions of photosynthesis, Calvin cycle enzyme activity, gas exchange capacity, chlorophyll fluorescence system, and membrane stability index. Furthermore, the increased levels of salicylic acid, gibberellins, cytokinins, melatonin, and indole-3-acetic acid, as well as a decrease in abscisic acid, indicated that foliar-applied MT greatly improved barley water stress tolerance. Additionally, by increasing the activity of antioxidant enzymes such as superoxide dismutase, catalase, ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase and decreasing hydrogen peroxide content, lipid peroxidation, and electrolyte leakage, MT application lessened water stress-induced oxidative stress. According to the newly discovered data, MT application improves barley water stress tolerance by reprogramming endogenous plant hormone production and antioxidant activity, which enhances membrane stability and photosynthesis. This study unraveled MT's crucial role in water deficiency mitigation, which can thus be applied to water stress management.
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Affiliation(s)
- Neveen B Talaat
- Department of Plant Physiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
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Sehar Z, Fatma M, Khan S, Mir IR, Abdi G, Khan NA. Melatonin influences methyl jasmonate-induced protection of photosynthetic activity in wheat plants against heat stress by regulating ethylene-synthesis genes and antioxidant metabolism. Sci Rep 2023; 13:7468. [PMID: 37156928 PMCID: PMC10167371 DOI: 10.1038/s41598-023-34682-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/05/2023] [Indexed: 05/10/2023] Open
Abstract
Melatonin (MT) and methyl jasmonate (MeJA) play important roles in the adaptation of plants to different stress factors by modulating stress tolerance mechanisms. The present study reports the involvement of MT (100 µM) in MeJA (10 µM)-induced photosynthetic performance and heat stress acclimation through regulation of the antioxidant metabolism and ethylene production in wheat (Triticum aestivum L.) plants. Plants exposed to 40 °C for 6 h per day for 15 days and allowed to retrieve at 28 °C showed enhanced oxidative stress and antioxidant metabolism, increased 1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) activity and ethylene production, and decreased photosynthetic performance. In contrast, the exogenously applied MT and MeJA reduced oxidative stress through improved S-assimilation (+ 73.6% S content), antioxidant defense system (+ 70.9% SOD, + 115.8% APX and + 104.2% GR, and + 49.5% GSH), optimized ethylene level to 58.4% resulting in improved photosynthesis by 75%. The use of p-chlorophenyl alanine, a MT biosynthesis inhibitor along with MeJA in the presence of heat stress reduced the photosynthetic performance, ATP-S activity and GSH content, substantiated the requirement of MT in the MeJA-induced photosynthetic response of plants under heat stress. These findings suggest that MeJA evoked the plant's ability to withstand heat stress by regulating the S-assimilation, antioxidant defense system, and ethylene production, and improving photosynthetic performance was dependent on MT.
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Affiliation(s)
- Zebus Sehar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Mehar Fatma
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Sheen Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Iqbal R Mir
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India
| | - Gholamreza Abdi
- Department of Biotechnology, Persian Gulf Research Institute, Persian Gulf University, Bushehr, 75169, Iran.
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India.
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Hu D, Zhang X, Xue P, Nie Y, Liu J, Li Y, Wang C, Wan X. Exogenous melatonin ameliorates heat damages by regulating growth, photosynthetic efficiency and leaf ultrastructure of carnation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 198:107698. [PMID: 37060867 DOI: 10.1016/j.plaphy.2023.107698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/21/2023] [Accepted: 04/06/2023] [Indexed: 05/07/2023]
Abstract
Carnation (Dianthus caryophyllus L.) is a floral crop that is highly valuable commercially. However, high temperatures adversely affect its growth and the quality of its cut flowers. Melatonin (MT) is a indole substance that can mitigate plant damage under heat stress. In this study, the leaves of carnation seedlings were sprayed with different concentrations of MT before exposure to high temperature. The indices of growth, physiological and chlorophyll fluorescence were measured and analyzed by the membership function method. The results showed that treatment with 100 μM MT was the most effective at ameliorating damage on carnation. We then analyzed the effects of 100 μM MT pretreatment on carnation at different time points of heat stress and found that this concentration of MT ameliorated the damage caused by heat stress, increased the content of photosynthetic pigments, enhanced the performance of photosystem II and improved photosynthesis. In addition, MT also reduced cell damage and lipid peroxidation, increased the activities of antioxidant enzymes and regulated the accumulation of osmotic substances in carnation. Moreover, MT increased the fresh/dry weight of stems and roots, promoted the opening of stomata, and protected the integrity of chloroplast structure of carnation. Compared with heat stress, pre-spraying with MT significantly down-regulated the transcription of a chlorophyll degradation gene and up-regulated the transcription of stress-related genes. Overall, this study provides a theoretical foundation for the mitigation of the adverse effects of exogenous MT under heat stress and proposes beneficial implications for the management of other plants subjected to global warming.
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Affiliation(s)
- Diandian Hu
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Xiaojing Zhang
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Pengcheng Xue
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Yuanyuan Nie
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Jinyu Liu
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Yan Li
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Can Wang
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Xueli Wan
- College of Landscape and Forestry, Qingdao Agricultural University, No.100, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China.
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Efimova MV, Danilova ED, Zlobin IE, Kolomeichuk LV, Murgan OK, Boyko EV, Kuznetsov VV. Priming Potato Plants with Melatonin Protects Stolon Formation under Delayed Salt Stress by Maintaining the Photochemical Function of Photosystem II, Ionic Homeostasis and Activating the Antioxidant System. Int J Mol Sci 2023; 24:ijms24076134. [PMID: 37047107 PMCID: PMC10094597 DOI: 10.3390/ijms24076134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 04/14/2023] Open
Abstract
Melatonin is among one of the promising agents able to protect agricultural plants from the adverse action of different stressors, including salinity. We aimed to investigate the effects of melatonin priming (0.1, 1.0 and 10 µM) on salt-stressed potato plants (125 mM NaCl), by studying the growth parameters, photochemical activity of photosystem II, water status, ion content and antioxidant system activity. Melatonin as a pleiotropic signaling molecule was found to decrease the negative effect of salt stress on stolon formation, tissue water content and ion status without a significant effect on the expression of Na+/H+-antiporter genes localized on the vacuolar (NHX1 to NHX3) and plasma membrane (SOS1). Melatonin effectively decreases the accumulation of lipid peroxidation products in potato leaves in the whole range of concentrations studied. A melatonin-induced dose-dependent increase in Fv/Fm together with a decrease in uncontrolled non-photochemical dissipation Y(NO) also indicates decreased oxidative damage. The observed protective ability of melatonin was unlikely due to its influence on antioxidant enzymes, since neither SOD nor peroxidase were activated by melatonin. Melatonin exerted positive effects on the accumulation of water-soluble low-molecular-weight antioxidants, proline and flavonoids, which could aid in decreasing oxidative stress. The most consistent positive effect was observed on the accumulation of carotenoids, which are well-known lipophilic antioxidants playing an important role in the protection of photosynthesis from oxidative damage. Finally, it is possible that melatonin accumulated during pretreatment could exert direct antioxidative effects due to the ROS scavenging activity of melatonin molecules.
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Affiliation(s)
- Marina V Efimova
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
| | - Elena D Danilova
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
| | - Ilya E Zlobin
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia
| | - Lilia V Kolomeichuk
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
| | - Olga K Murgan
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
| | - Ekaterina V Boyko
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
| | - Vladimir V Kuznetsov
- Department of Plant Physiology, Biotechnology and Bioinformatics, Biological Institute, National Research Tomsk State University, Lenin Avenue 36, Tomsk 634050, Russia
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia
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10
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Mushtaq NU, Alghamdi KM, Saleem S, Tahir I, Bahieldin A, Henrissat B, Alghamdi MK, Rehman RU, Hakeem KR. Exogenous zinc mitigates salinity stress by stimulating proline metabolism in proso millet ( Panicum miliaceum L.). FRONTIERS IN PLANT SCIENCE 2023; 14:1053869. [PMID: 36968428 PMCID: PMC10036794 DOI: 10.3389/fpls.2023.1053869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Salinity is one of the most concerning ecological restrictions influencing plant growth, which poses a devastating threat to global agriculture. Surplus quantities of ROS generated under stress conditions have negative effects on plants' growth and survival by damaging cellular components, including nucleic acids, lipids, proteins and carbohydrates. However, low levels of ROS are also necessary because of their role as signalling molecules in various development-related pathways. Plants possess sophisticated antioxidant systems for scavenging as well as regulating ROS levels to protect cells from damage. Proline is one such crucial non-enzymatic osmolyte of antioxidant machinery that functions in the reduction of stress. There has been extensive research on improving the tolerance, effectiveness, and protection of plants against stress, and to date, various substances have been used to mitigate the adverse effects of salt. In the present study Zinc (Zn) was applied to elucidate its effect on proline metabolism and stress-responsive mechanisms in proso millet. The results of our study indicate the negative impact on growth and development with increasing treatments of NaCl. However, the low doses of exogenous Zn proved beneficial in mitigating the effects of NaCl by improving morphological and biochemical features. In salt-treated plants, the low doses of Zn (1 mg/L, 2 mg/L) rescued the negative impact of salt (150mM) as evidenced by increase in shoot length (SL) by 7.26% and 25.5%, root length (RL) by 21.84% and 39.07% and membrane stability index (MSI) by 132.57% and 151.58% respectively.The proline content improved at all concentrations with maximum increase of 66.65% at 2 mg/L Zn. Similarly, the low doses of Zn also rescued the salt induced stress at 200mM NaCl. The enzymes related to proline biosynthesis were also improved at lower doses of Zn. In salt treated plants (150mM), Zn (1 mg/L, 2 mg/L) increased the activity of P5CS by 19.344% and 21%. The P5CR and OAT activities were also improved with maximum increase of 21.66% and 21.84% at 2 mg/L Zn respectively. Similarly, the low doses of Zn also increased the activities of P5CS, P5CR and OAT at 200mM NaCl. Whereas P5CDH enzyme activity showed a decrease of 82.5% at 2mg/L Zn+150mM NaCl and 56.7% at 2mg/L Zn+200 mM NaCl. These results strongly imply the modulatory role of Zn in maintaining of proline pool during NaCl stress.
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Affiliation(s)
- Naveed Ul Mushtaq
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Khalid M. Alghamdi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Seerat Saleem
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Inayatullah Tahir
- Department of Botany, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Ahmad Bahieldin
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - Mohammed Khalid Alghamdi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Reiaz Ul Rehman
- Department of Bioresources, School of Biological Sciences, University of Kashmir, Srinagar, India
| | - Khalid Rehman Hakeem
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Princess Dr. Najla Bint Saud Al-Saud Center for Excellence Research in Biotechnology, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Public Health, Daffodil International University, Dhaka, Bangladesh
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11
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Talaat NB, Hanafy AMA. Spermine-Salicylic Acid Interplay Restrains Salt Toxicity in Wheat ( Triticum aestivum L.). PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12020352. [PMID: 36679065 PMCID: PMC9861978 DOI: 10.3390/plants12020352] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 11/06/2022] [Accepted: 11/07/2022] [Indexed: 05/30/2023]
Abstract
Spermine (SPM) and salicylic acid (SA) are plant growth regulators, eliciting specific responses against salt toxicity. In this study, the potential role of 30 mgL-1 SPM and/or 100 mgL-1 SA in preventing salt damage was investigated. Wheat plants were grown under non-saline or saline conditions (6.0 and 12.0 dS m-1) with and without SA and/or SPM foliar applications. Exogenously applied SA and/or SPM alleviated the inhibition of plant growth and productivity under saline conditions by increasing Calvin cycle enzyme activity. Foliage applications also improved ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase activities, which effectively scavenged hydrogen peroxide and superoxide radicals in stressed plants. Furthermore, foliar treatments increased antioxidants such as ascorbate and glutathione, which effectively detoxified reactive oxygen species (ROS). Exogenous applications also increased N, P, and K+ acquisition, roots' ATP content, and H+-pump activity, accompanied by significantly lower Na+ accumulation in stressed plants. Under saline environments, exogenous SA and/or SPM applications raised endogenous SA and SPM levels. Co-application of SA and SPM gave the best response. The newly discovered data suggest that the increased activities of Calvin cycle enzymes, root H+-pump, and antioxidant defense machinery in treated plants are a mechanism for salt tolerance. Therefore, combining the use of SA and SPM can be a superior method for reducing salt toxicity in sustainable agricultural systems.
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12
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Wang K, He J, Gao Y, Han K, Liu J, Wang Y. Exogenous melatonin improved the growth and development of naked oat seedlings under cadmium stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:88109-88118. [PMID: 35821327 DOI: 10.1007/s11356-022-21798-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Heavy metal pollution has become a global problem, which affect more and more crop yields. Melatonin (MT) is widely used in plant stress resistance to alleviate the toxicity caused by heavy metals and other stresses. In this paper, the effects of exogenous 50 μM and 100 μM MT on the growth and development of naked oat seedlings under cadmium stress (25 mg L-1) were studied. The results showed that different concentrations of MT could promote the growth of naked oat seedlings under 25-mg L-1 cadmium stress. The application of exogenous melatonin could significantly increase the plant height, fresh weight, dry weight, chlorophyll, and proline contents of naked oats. MT could also reduce the contents of hydrogen peroxide, superoxide anion, and malondialdehyde in the cells of naked oat seedlings, and increase the activities of SOD, POD, and CAT. In addition, exogenous melatonin could affect the gene expression of LOX, POX, and Asmap1 in MAPK family and NAC and WRKY1 in TFS family in naked oat seedlings, thus promoting the growth and development of naked oat seedlings. In conclusion, this study is the first to demonstrate that MT is able to alleviate the negative effects to treat naked oat seedlings with cadmium stress. Therefore, melatonin has the potential to be applied in crops threatened by heavy metals.
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Affiliation(s)
- Kai Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China
| | - Jinjin He
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China
| | - Yu Gao
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China
| | - Kai Han
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China
| | - Jiaqi Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China
| | - Yingjuan Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Science, Northwest University, Xi'an, 710069, China.
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13
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Yuan X, An J, Zheng T, Liu W. Exogenous melatonin improves salt tolerance mainly by regulating the antioxidant system in cyanobacterium Nostoc flagelliforme. PeerJ 2022; 10:e14479. [PMID: 36518273 PMCID: PMC9744160 DOI: 10.7717/peerj.14479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 11/07/2022] [Indexed: 11/30/2022] Open
Abstract
Melatonin is a multifunctional nontoxic bio-stimulant or signaling molecule, generally distributing in different animal and plant organs for invigorating numerous physiological processes against abiotic stresses. In this study, we investigated the potential impact of melatonin on the cyanobacterium Nostoc flagelliforme when exposed to salt stress according to some biochemical and physiological parameters, such as relative electrolyte leakage, PSII activity, and photosynthetic pigments including chlorophyll a, phycocyanobilin, and phycoerythrobilin. We found that melatonin could also maintain K+ homeostasis in salt-stressed N. flagelliforme. These above results confirmed melatonin had multiple functions in hyperosmotic stress and ion stress caused by salinity. Notably, we observed melatonin could regulate the reactive oxygen species (ROS) signal and distinctly decrease the content of hydrogen peroxide and superoxide anion in salt-stressed cells, which were largely attributed to the increased antioxidant enzymes activities including catalase, superoxide dismutase, ascorbate peroxidase, and glutathione reductase. Finally, qRT-PCR analysis showed that melatonin stimulated the expression of antioxidant genes (NfCAT, NfSOD, and NfGR). In general, our findings demonstrate melatonin has beneficial effects on N. flagelliforme under salt stress by intensively regulating antioxidant system.
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Affiliation(s)
- Xiaolong Yuan
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi’an, China
| | - Jing An
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi’an, China
| | - Tao Zheng
- School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi’an, China
| | - Wenjian Liu
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi’an, China
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14
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Khan S, Sehar Z, Fatma M, Mir IR, Iqbal N, Tarighat MA, Abdi G, Khan NA. Involvement of ethylene in melatonin-modified photosynthetic-N use efficiency and antioxidant activity to improve photosynthesis of salt grown wheat. PHYSIOLOGIA PLANTARUM 2022; 174:e13832. [PMID: 36437590 DOI: 10.1111/ppl.13832] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/24/2022] [Accepted: 11/21/2022] [Indexed: 05/25/2023]
Abstract
The involvement of melatonin in the regulation of salt stress acclimation has been shown in plants in this present work. We found that the GOAL cultivar of wheat (Triticum aestivum L.) was the most salt-tolerant among the investigated cultivars, GOAL, HD-2967, PBW-17, PBW-343, PBW-550, and WH-1105 when screened for tolerance to 100 mM NaCl. The application of 100 μM melatonin maximally reduced oxidative stress and improved photosynthesis in the cv. GOAL. Melatonin supplementation reduced salt stress-induced oxidative stress by upregulating the activity of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), and glutathione reductase (GR), and reduced the glutathione (GSH) production. This resulted in increased membrane stability, photosynthetic-N use efficiency and photosynthesis in plants. The application of 50 μM of the ethylene biosynthesis inhibitor aminoethoxyvinylglycine (AVG) in the presence of melatonin and salt stress increased H2 O2 content but reduced GR activity and GSH, photosynthesis, and plant dry mass. This signifies that melatonin-mediated salt stress tolerance was related to ethylene synthesis as it improved antioxidant activity and photosynthesis of plants under salt stress. Thus, the interaction of melatonin and ethylene bears a prominent role in salt stress tolerance in wheat and can be used to develop salt tolerance in other crops.
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Affiliation(s)
- Sheen Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Zebus Sehar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Mehar Fatma
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Iqbal R Mir
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, India
| | | | | | - Gholamareza Abdi
- Department of Biotechnology, Persian Gulf Research Institute, Persian Gulf University, Bushehr, Iran
| | - Nafees A Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, India
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15
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Huang X, Tanveer M, Min Y, Shabala S. Melatonin as a regulator of plant ionic homeostasis: implications for abiotic stress tolerance. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:5886-5902. [PMID: 35640481 DOI: 10.1093/jxb/erac224] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
Melatonin is a highly conserved and ubiquitous molecule that operates upstream of a broad array of receptors in animal systems. Since melatonin was discovered in plants in 1995, hundreds of papers have been published revealing its role in plant growth, development, and adaptive responses to the environment. This paper summarizes the current state of knowledge of melatonin's involvement in regulating plant ion homeostasis and abiotic stress tolerance. The major topics covered here are: (i) melatonin's control of H+-ATPase activity and its implication for plant adaptive responses to various abiotic stresses; (ii) regulation of the reactive oxygen species (ROS)-Ca2+ hub by melatonin and its role in stress signaling; and (iii) melatonin's regulation of ionic homeostasis via hormonal cross-talk. We also show that the properties of the melatonin molecule allow its direct scavenging of ROS, thus preventing negative effects of ROS-induced activation of ion channels. The above 'desensitization' may play a critical role in preventing stress-induced K+ loss from the cytosol as well as maintaining basic levels of cytosolic Ca2+ required for optimal cell operation. Future studies should focus on revealing the molecular identity of transporters that could be directly regulated by melatonin and providing a bioinformatic analysis of evolutionary aspects of melatonin sensing and signaling.
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Affiliation(s)
- Xin Huang
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan, Guangdong, China
| | - Mohsin Tanveer
- Tasmanian Institute of Agriculture, University of Tasmania, Tas, Hobart, Australia
| | - Yu Min
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan, Guangdong, China
| | - Sergey Shabala
- International Research Center for Environmental Membrane Biology, Foshan University, Foshan, Guangdong, China
- Tasmanian Institute of Agriculture, University of Tasmania, Tas, Hobart, Australia
- School of Biological Sciences, University of Western Australia, Perth, WA, Australia
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16
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Li M, Zhou J, Du J, Li X, Sun Y, Wang Z, Lin Y, Zhang Y, Wang Y, He W, Wang X, Chen Q, Zhang Y, Luo Y, Tang H. Comparative Physiological and Transcriptomic Analyses of Improved Heat Stress Tolerance in Celery (Apium Graveolens L.) Caused by Exogenous Melatonin. Int J Mol Sci 2022; 23:ijms231911382. [PMID: 36232683 PMCID: PMC9569527 DOI: 10.3390/ijms231911382] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 12/03/2022] Open
Abstract
Melatonin (MT) is crucial in plant growth, development, and response to stress. Celery is a vegetable that grows in a cool climate, and a hot climate can deteriorate its growth, yield, and quality. This study investigates the effect of exogenous melatonin on celery physiology. Transcriptional levels were analyzed by spraying celery with exogenous MT before exposing it to high temperatures. The regulatory mechanism of exogenous MT-mediated heat tolerance was examined. The results show that the exogenous MT reduced the thermal damage state of celery seedlings, as well as the malondialdehyde (MDA) content and relative conductivity (REC), increasing the oxidase activity, the osmotic regulatory substances, and chlorophyll, enhancing the leaf transpiration and the light energy utilization efficiency. We examined the mechanism of exogenous MT in mitigating high-temperature damage using the transcriptome sequencing method. A total of 134 genes were expressed differently at high temperature in the celery treated with MT compared with the untreated celery. Functional annotation analysis revealed that the differentially expressed genes were abundant in the “pyruvate metabolism” pathway and the “peroxidase activity” pathway. According to the pathway-based gene expression analysis, exogenous MT can inhibit the upregulation of pyruvate synthesis genes and the downregulation of pyruvate consumption genes, preventing the accumulated pyruvate from rapidly upregulating the expression of peroxidase genes, and thereby enhancing peroxidase activity. RT-qPCR verification showed a rising encoding peroxidase gene expression under MT treatment. The gene expression pattern involved in pyruvate anabolism and metabolism agreed with the abundant transcriptome expression, validating the physiological index results. These results indicate that the application of exogenous MT to celery significantly enhances the ability of plant to remove reactive oxygen species (ROS) in response to heat stress, thereby improving the ability of plant to resist heat stress. The results of this study provide a theoretical basis for the use of MT to alleviate the damage caused by heat stress in plant growth and development.
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Affiliation(s)
- Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jin Zhou
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jiageng Du
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoyan Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yue Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhuo Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuanxiu Lin
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Wen He
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
- Institute of Pomology & Olericulture, Sichuan Agricultural University, Chengdu 611130, China
- Correspondence:
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17
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Liu T, Xing G, Chen Z, Zhai X, Wei X, Wang C, Li T, Zheng S. Effect of exogenous melatonin on salt stress in cucumber: alleviating effect and molecular basis. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2128875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Tingting Liu
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Guoming Xing
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Zhifeng Chen
- School of Biological and Agricultural Science and Technology, Zunyi Normal University, Zunyi, P.R. China
| | - Xijiao Zhai
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Xuyang Wei
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Chen Wang
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Tianmeng Li
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
| | - Shaowen Zheng
- Department of Basic Science, College of Horticulture, Shanxi Agricultural University, Taigu, P.R. China
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18
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Zulfiqar F, Nafees M, Chen J, Darras A, Ferrante A, Hancock JT, Ashraf M, Zaid A, Latif N, Corpas FJ, Altaf MA, Siddique KHM. Chemical priming enhances plant tolerance to salt stress. FRONTIERS IN PLANT SCIENCE 2022; 13:946922. [PMID: 36160964 PMCID: PMC9490053 DOI: 10.3389/fpls.2022.946922] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/25/2022] [Indexed: 05/10/2023]
Abstract
Salt stress severely limits the productivity of crop plants worldwide and its detrimental effects are aggravated by climate change. Due to a significant world population growth, agriculture has expanded to marginal and salinized regions, which usually render low crop yield. In this context, finding methods and strategies to improve plant tolerance against salt stress is of utmost importance to fulfill food security challenges under the scenario of the ever-increasing human population. Plant priming, at different stages of plant development, such as seed or seedling, has gained significant attention for its marked implication in crop salt-stress management. It is a promising field relying on the applications of specific chemical agents which could effectively improve plant salt-stress tolerance. Currently, a variety of chemicals, both inorganic and organic, which can efficiently promote plant growth and crop yield are available in the market. This review summarizes our current knowledge of the promising roles of diverse molecules/compounds, such as hydrogen sulfide (H2S), molecular hydrogen, nitric oxide (NO), hydrogen peroxide (H2O2), melatonin, chitosan, silicon, ascorbic acid (AsA), tocopherols, and trehalose (Tre) as potential primers that enhance the salinity tolerance of crop plants.
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Affiliation(s)
- Faisal Zulfiqar
- Department of Horticultural Sciences, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Muhammad Nafees
- Department of Horticultural Sciences, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Jianjun Chen
- Mid-Florida Research and Education Center, Environmental Horticulture Department, Institute of Food and Agricultural Sciences, University of Florida, Apopka, FL, United States
| | - Anastasios Darras
- Department of Agriculture, University of the Peloponnese, Kalamata, Greece
| | - Antonio Ferrante
- Department of Food, Environmental and Nutritional Science, Università degli Studi di Milano, Milano, Italy
| | - John T. Hancock
- Department of Applied Sciences, University of the West of England, Bristol, United Kingdom
| | - Muhammad Ashraf
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Abbu Zaid
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Nadeem Latif
- Department of Horticultural Sciences, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Francisco J. Corpas
- Antioxidant, Free Radical and Nitric Oxide in Biotechnology, Food and Agriculture Group, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
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19
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Duan W, Lu B, Liu L, Meng Y, Ma X, Li J, Zhang K, Sun H, Zhang Y, Dong H, Bai Z, Li C. Effects of Exogenous Melatonin on Root Physiology, Transcriptome and Metabolome of Cotton Seedlings under Salt Stress. Int J Mol Sci 2022; 23:ijms23169456. [PMID: 36012720 PMCID: PMC9409268 DOI: 10.3390/ijms23169456] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/13/2022] [Accepted: 08/18/2022] [Indexed: 11/22/2022] Open
Abstract
Root systems are the key organs through which plants absorb water and nutrients and perceive the soil environment and thus are easily damaged by salt stress. Melatonin can alleviate stress-induced damage to roots. The present study investigated the effects of exogenous melatonin on the root physiology, transcriptome and metabolome of cotton seedlings under salt stress. Salt stress was observed to damage the cell structure and disorder the physiological system of cotton seedling roots. After subjecting melatonin-soaked seeds to salt stress, the activities of SOD, CAT and POD in cotton seedling roots increased by 10–25%, 50–60% and 50–60%, respectively. The accumulation of H2O2 and MDA were significantly decreased by 30–60% and 30–50%, respectively. The contents of soluble sugar, soluble protein and K+ increased by 15–30%, 15–30% and 20–50%, respectively, while the Na+ content was significantly reduced. Melatonin also increased auxin (by 20–40%), brassinosteroids (by 5–40%) and gibberellin (by 5–35%) and promoted melatonin content and root activity. Exogenous melatonin maintained the integrity of root cells and increased the number of organelles. Transcriptomic and metabolomic results showed that exogenous melatonin could mitigate the salt-stress-induced inhibition of plant root development by regulating the reactive oxygen species scavenging system; ABC transporter synthesis; plant hormone signal transduction, endogenous melatonin gene expression; and the expression of the transcription factors MYB, TGA and WRKY33. These results provide a new direction and empirical basis for improving crop salt tolerance with melatonin.
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Affiliation(s)
- Wenjing Duan
- State Key Laboratory of North China Crop Improvement and Regulation, College of Life Science, Hebei Agricultural University, Baoding 071000, China
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Bin Lu
- College of Landscape and Tourism, Hebei Agricultural University, Baoding 071000, China
| | - Liantao Liu
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Yanjun Meng
- State Key Laboratory of North China Crop Improvement and Regulation, College of Life Science, Hebei Agricultural University, Baoding 071000, China
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Xinying Ma
- State Key Laboratory of North China Crop Improvement and Regulation, College of Life Science, Hebei Agricultural University, Baoding 071000, China
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Jin Li
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Ke Zhang
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Hongchun Sun
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Yongjiang Zhang
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
| | - Hezhong Dong
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
- Cotton Research Center, Key Laboratory of Cotton Breeding and Cultivation in Huang-Huai-Hai Plain, Ministry of Agriculture, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Zhiying Bai
- State Key Laboratory of North China Crop Improvement and Regulation, College of Life Science, Hebei Agricultural University, Baoding 071000, China
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
- Correspondence: (Z.B.); (C.L.)
| | - Cundong Li
- State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Crop Growth Regulation of Hebei Province, College of Agronomy, Hebei Agricultural University, Baoding 071000, China
- Correspondence: (Z.B.); (C.L.)
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Wei L, Zhao H, Wang B, Wu X, Lan R, Huang X, Chen B, Chen G, Jiang C, Wang J, Liu Y, Zheng Q. Exogenous Melatonin Improves the Growth of Rice Seedlings by Regulating Redox Balance and Ion Homeostasis Under Salt Stress. JOURNAL OF PLANT GROWTH REGULATION 2022; 41:2108-2121. [PMID: 0 DOI: 10.1007/s00344-021-10417-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 06/05/2021] [Indexed: 05/26/2023]
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21
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Wang G, Xing M, Hu T, Ji M, Li X, Amombo E, Shao A, Xu X, Fu J. Photosystem II photochemical adjustment of tall fescue against heat stress after melatonin priming. JOURNAL OF PLANT PHYSIOLOGY 2022; 275:153758. [PMID: 35797828 DOI: 10.1016/j.jplph.2022.153758] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 06/14/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
High temperature is the key factor restricting the survival of tall fescue. Extreme summer hot events arise from global warming further increases this risk. As a candidate chemical priming agent previously reported, melatonin offers innovative solution to improve heat resistance of plants. However, the mechanistic insight remains ill-defined, especially in PSII photochemical reactions. In this study, we investigated the effect of melatonin priming on photosynthetic electron transport of PS II against heat stress in tall fescue. Results showed that melatonin weakened the electron transfer efficiency of PS II per light reaction center (RC) at donor-side and receptor-side, while increased the number of RC per unit cross-sectional area. The quenching analysis further revealed that the proportion of photochemical quenching, Y(II), increased by melatonin. Considering the enriched chl a and nonevent oxidative damage, we argued that inefficient but more abundant RC introduced by melatonin protected the PSII from oxidative damage under heat stress. Notably, these effects were dependent on melatonin concentration but not temperature, an optimal application concentration (50 μmol/L) was uncovered. Besides, melatonin decreased NPQ and encouraged reverse reaction of the xanthophyll cycle. We proposed that melatonin prevents the production of excessive excitation energy. In brief, melatonin plays a distinctive role in regulating photoelectric conversion of PSII of tall fescue under heat stress, increased its survival rate after heat shock.
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Affiliation(s)
- Guangyang Wang
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - Meiling Xing
- China Agricultural University, Yantai, Shandong, 264670, China
| | - Tao Hu
- Lanzhou University, Lanzhou City, GanSu, 730000, China
| | - Mingxia Ji
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - Xiaoning Li
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - Eric Amombo
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - An Shao
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - Xiao Xu
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China
| | - Jinmin Fu
- Coastal Salinity Tolerant Grass Engineering and Technology Research Center, Ludong University, Yantai, Shandong, 264025, China.
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22
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Chen X, Xu Z, Zhao B, Yang Y, Mi J, Zhao Z, Liu J. Physiological and Proteomic Analysis Responsive Mechanisms for Salt Stress in Oat. FRONTIERS IN PLANT SCIENCE 2022; 13:891674. [PMID: 35783977 PMCID: PMC9240473 DOI: 10.3389/fpls.2022.891674] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
Oat is considered as a moderately salt-tolerant crop that can be used to improve saline and alkaline soils. Previous studies have focused on short-term salt stress exposure, and the molecular mechanisms of salt tolerance in oat have not yet been elucidated. In this study, the salt-tolerant oat cultivar Vao-9 and the salt-sensitive oat cultivar Bai5 were treated with 6 days of 0 and 150 mmol L-1 salt stress (nNaCl:nNa2SO4 = 1:1). Label-Free technology was then used to analyze the differentially expressed proteins in leaves under 0 and 150 mmol L-1 salt stress. The obtained results indicated that total of 2,631 proteins were identified by mass spectrometry in the four samples. The salt-tolerant cultivar Vao-9 mainly enhances its carbohydrate and energy metabolism through the pentose and glucuronate interconversions, and carbon fixation pathways in prokaryotes, thereby reducing the damage caused by salt stress. In addition, the down-regulation of ribosomes expression and the up-regulated expression of HSPs and CRT are all through the regulation of protein synthesis in response to salt stress. However, GABA metabolism presents a different synthesis pattern in Bai5 and Vao-9. The main KEGG function of differential expressed protein (DEP) in Bai5 is classified into protein processing in the endoplasmic reticulum, estrogen signaling pathway, antigen processing and presentation, longevity regulating pathway-multiple species, arginine and proline metabolism, beta-alanine metabolism, vitamin B6 metabolism, salmonella infection, chloroalkane and chloroalkene degradation, and limonene and pinene degradation. Moreover, the main KEGG functions of DEP in Vao-9 are classified as ribosome and carbon fixation pathways in prokaryotes, pentose and glucuronate interconversions, GABA ergic synapse, and taurine and hypotaurine metabolism. The results obtained in this study provide an important basis for further research on the underlying mechanisms of salt response and tolerance in oat and other plant species.
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Affiliation(s)
- Xiaojing Chen
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Zhongshan Xu
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Baoping Zhao
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Yanming Yang
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Junzhen Mi
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Zhou Zhao
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
| | - Jinghui Liu
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, China
- National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, China
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Hassan MU, Mahmood A, Awan MI, Maqbool R, Aamer M, Alhaithloul HAS, Huang G, Skalicky M, Brestic M, Pandey S, El Sabagh A, Qari SH. Melatonin-Induced Protection Against Plant Abiotic Stress: Mechanisms and Prospects. FRONTIERS IN PLANT SCIENCE 2022; 13:902694. [PMID: 35755707 PMCID: PMC9218792 DOI: 10.3389/fpls.2022.902694] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/25/2022] [Indexed: 05/23/2023]
Abstract
Global warming in this century increases incidences of various abiotic stresses restricting plant growth and productivity and posing a severe threat to global food production and security. The plant produces different osmolytes and hormones to combat the harmful effects of these abiotic stresses. Melatonin (MT) is a plant hormone that possesses excellent properties to improve plant performance under different abiotic stresses. It is associated with improved physiological and molecular processes linked with seed germination, growth and development, photosynthesis, carbon fixation, and plant defence against other abiotic stresses. In parallel, MT also increased the accumulation of multiple osmolytes, sugars and endogenous hormones (auxin, gibberellic acid, and cytokinins) to mediate resistance to stress. Stress condition in plants often produces reactive oxygen species. MT has excellent antioxidant properties and substantially scavenges reactive oxygen species by increasing the activity of enzymatic and non-enzymatic antioxidants under stress conditions. Moreover, the upregulation of stress-responsive and antioxidant enzyme genes makes it an excellent stress-inducing molecule. However, MT produced in plants is not sufficient to induce stress tolerance. Therefore, the development of transgenic plants with improved MT biosynthesis could be a promising approach to enhancing stress tolerance. This review, therefore, focuses on the possible role of MT in the induction of various abiotic stresses in plants. We further discussed MT biosynthesis and the critical role of MT as a potential antioxidant for improving abiotic stress tolerance. In addition, we also addressed MT biosynthesis and shed light on future research directions. Therefore, this review would help readers learn more about MT in a changing environment and provide new suggestions on how this knowledge could be used to develop stress tolerance.
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Affiliation(s)
- Muhammad Umair Hassan
- Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, China
| | - Athar Mahmood
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Masood Iqbal Awan
- Department of Agronomy, Sub-Campus Depalpur, Okara, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Rizwan Maqbool
- Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Muhammad Aamer
- Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, China
- Department of Agronomy, Sub-Campus Depalpur, Okara, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | | | - Guoqin Huang
- Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang, China
| | - Milan Skalicky
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
| | - Marian Brestic
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Prague, Czechia
- Department of Plant Physiology, Slovak University of Agriculture, Nitra, Slovakia
| | - Saurabh Pandey
- Department of Agriculture, Guru Nanak Dev University, Amritsar, India
| | - Ayman El Sabagh
- Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, Egypt
- Department of Field Crops, Faculty of Agriculture, Siirt University, Siirt, Turkey
| | - Sameer H. Qari
- Department of Biology, Al-Jumum University College, Umm Al-Qura University, Makkah, Saudi Arabia
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Talaat NB, Shawky BT. Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat ( Triticum aestivum L.) Plants by Enhancing Root H +-Pump Activity. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11030416. [PMID: 35161397 PMCID: PMC8840481 DOI: 10.3390/plants11030416] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 05/23/2023]
Abstract
Salicylic acid (SA) and melatonin (MT) have been shown to play important roles in plant salt tolerance. However, the underlying mechanisms of SA-MT-interaction-mediated ionic homeostasis in salt-stressed plants are unknown. As a first investigation, this study aimed to clarify how SA-MT interaction affects H+-pump activity in maintaining the desired ion homeostasis under saline conditions and its relation to ROS metabolism. Wheat (Triticum aestivum L.) plants were grown under non-saline or saline conditions and were foliar sprayed with 75 mg L-1 SA or 70 μM MT. The SA+MT combined treatment significantly increased N, P, K+, Fe, Zn, and Cu acquisition, accompanied by significantly lower Na+ accumulation in salt-stressed plants compared to non-stressed ones. Additionally, it significantly enhanced ATP content and H+-pump activity of the roots. The mitigation was also detected in the reduced superoxide radical content, electrolyte leakage, and lipoxygenase activity, as well as increased superoxide dismutase, catalase, peroxidase, and polyphenol oxidase activities; K+/Na+, Ca2+/Na+, and Mg2+/Na+ ratios; relative water content; membrane stability index; and free amino acid accumulation in treated plants. The novel evidence shows that the higher root H+-pump activity in treated plants is a tolerance mechanism that increases the salt tolerance via maintaining ionic homeostasis.
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Affiliation(s)
- Neveen B. Talaat
- Department of Plant Physiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - Bahaa T. Shawky
- Department of Microbial Chemistry, Biotechnology Research Institute, National Research Centre, Giza 12311, Egypt;
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25
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Wei J, Liang J, Liu D, Liu Y, Liu G, Wei S. Melatonin-induced physiology and transcriptome changes in banana seedlings under salt stress conditions. FRONTIERS IN PLANT SCIENCE 2022; 13:938262. [PMID: 36147243 PMCID: PMC9485729 DOI: 10.3389/fpls.2022.938262] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/05/2022] [Indexed: 05/17/2023]
Abstract
Soil salinization poses a serious threat to the ecological environment and agricultural production and is one of the most common abiotic stresses in global agricultural production. As a salt-sensitive plant, the growth, development, and production of bananas (Musa acuminata L.) are restricted by salt stress. Melatonin is known to improve the resistance of plants to stress. The study analyzed the effects of 100 μM melatonin on physiological and transcriptome changes in banana varieties (AAA group cv. Cavendish) under 60 mmol/l of NaCl salt stress situation. The phenotypic results showed that the application of exogenous melatonin could maintain banana plants' health growth and alleviate the damage caused by salt stress. The physiological data show that the application of exogenous melatonin can enhance salt tolerance of banana seedlings by increasing the content of proline content and soluble protein, slowing down the degradation of chlorophyll, reducing membrane permeability and recovery of relative water content, increasing the accumulation of MDA, and enhancing antioxidant defense activity. Transcriptome sequencing showed that melatonin-induced salt tolerance of banana seedlings involved biological processes, molecular functions, and cellular components. We also found that differentially expressed genes (DEGs) are involved in a variety of metabolic pathways, including amino sugar and nucleotide sugar metabolism, phenylalanine metabolism, cyanoamino acid metabolism, starch and sucrose metabolism, and linoleic acid metabolism. These major metabolism and biosynthesis may be involved in the potential mechanism of melatonin under salt stress. Furthermore, some members of the transcription factor family, such as MYB, NAC, bHLH, and WRKY, might contribute to melatonin alleviating salt stress tolerance of the banana plant. The result laid a basis for further clarifying the salt stress resistance mechanism of bananas mediated by exogenous melatonin and provides theoretical bases to utilize melatonin to improve banana salt tolerance in the future.
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Affiliation(s)
- Junya Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jinhao Liang
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Debing Liu
- Applied Science and Technology College, Hainan University, Haikou, China
- *Correspondence: Debing Liu,
| | - Yuewei Liu
- Applied Science and Technology College, Hainan University, Haikou, China
| | - Guoyin Liu
- Forestry College, Hainan University, Haikou, China
- Guoyin Liu,
| | - Shouxing Wei
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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26
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Han Y, Gao Y, Li M, Du Y, Zhang Y, Zhang W, Du J. The molecular events underpinning cultivar differences in melatonin counteracting salt damage in Phaseolus vulgaris. FUNCTIONAL PLANT BIOLOGY : FPB 2022; 49:201-217. [PMID: 34871542 DOI: 10.1071/fp21126] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Melatonin (N -acetyl-5-methoxytryptamine) plays important roles in multiple stress responses, especially under salt stress. However, cultivar differences in melatonin mediated salt stress tolerance are unclear. Phaseolus vulgaris L. (common bean) cultivars Jiyin 1 (JY, salt-tolerant) and Xuliyabai (XL, salt-sensitive) were used in this study. Exogenous melatonin significantly improved root growth under salt stress in JY, but had little effect on XL. Physiology analysis showed significant differences in activities of antioxidant enzymes (superoxide, SOD; and catalase, CAT) and malondialdehyde content between JY and XL. Meanwhile, the change of ABA content in JY and XL root was opposite in salt plus melatonin treatment. Comparative root transcriptomes of JY and XL revealed 3505 and 668 differentially expressed genes (DEGs) regulated by salt stress and melatonin. The most enriched melatonin-responsive genes under salt stress are mainly involved in regulation of transcription, oxidation-reduction process, transcription factor activity, oxidoreductase activity. In addition, melatonin induced more obvious changes of DEGs in JY than that in XL under salt condition. Melatonin also significantly induced 41 DEGs only in JY, including signal transduction genes, transcription factors, ubiquitin protein ligases, ion homeostasis and osmotic adjustment genes etc. This study uncovered the molecular mechanism of cultivar difference of melatonin response under salt stress in common bean.
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Affiliation(s)
- Yiqiang Han
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China; and National Coarse Cereals Engineering Research Center, Daqing 163319, Heilongjiang Province, P. R. China
| | - Yamei Gao
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China; and Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in the Cold Region, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
| | - Ming Li
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
| | - Yanli Du
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
| | - Yuxian Zhang
- National Coarse Cereals Engineering Research Center, Daqing 163319, Heilongjiang Province, P. R. China; and College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
| | - Wenhui Zhang
- College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
| | - Jidao Du
- National Coarse Cereals Engineering Research Center, Daqing 163319, Heilongjiang Province, P. R. China; and College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang Province, P. R. China
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Lee HY, Back K. 2-Hydroxymelatonin, Rather Than Melatonin, Is Responsible for RBOH-Dependent Reactive Oxygen Species Production Leading to Premature Senescence in Plants. Antioxidants (Basel) 2021; 10:antiox10111728. [PMID: 34829600 PMCID: PMC8614918 DOI: 10.3390/antiox10111728] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 10/27/2021] [Accepted: 10/27/2021] [Indexed: 12/12/2022] Open
Abstract
Unlike animals, plants amply convert melatonin into 2-hydroxymelatonin (2-OHM) and cyclic 3-hydroxymelatonin (3-OHM) through the action of melatonin 2-hydroxylase (M2H) and melatonin 3-hydroxylase (M3H), respectively. Thus, the effects of exogenous melatonin treatment in plants may be caused by melatonin, 2-OHM, or 3-OHM, or some combination of these compounds. Indeed, studies of melatonin's effects on reactive oxygen species (ROS) production have reported conflicting results. In this study, we demonstrated that 2-OHM treatment induced ROS production, whereas melatonin did not. ROS production from 2-OHM treatment occurred in old arabidopsis leaves in darkness, consistent with an ethylene-mediated senescence mechanism. Transgenic tobacco plants containing overexpressed rice M2H exhibited dwarfism and leaf necrosis of the upper leaves and early senescence of the lower leaves. We also demonstrated that 2-OHM-mediated ROS production is respiratory burst NADPH oxidase (RBOH)-dependent and that 2-OHM-induced senescence genes require ethylene and the abscisic acid (ABA) signaling pathway in arabidopsis. In contrast to melatonin, 2-OHM treatment induced senescence symptoms such as leaf chlorosis and increased ion leakage in arabidopsis. Senescence induction is known to begin with decreased levels of proteins involved in chloroplast maintenance, including Lhcb1 and ClpR1. Together, these results show that 2-OHM acts as a senescence-inducing factor by inducing ROS production in plants.
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28
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Hasanuzzaman M, Raihan MRH, Masud AAC, Rahman K, Nowroz F, Rahman M, Nahar K, Fujita M. Regulation of Reactive Oxygen Species and Antioxidant Defense in Plants under Salinity. Int J Mol Sci 2021; 22:ijms22179326. [PMID: 34502233 PMCID: PMC8430727 DOI: 10.3390/ijms22179326] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 02/07/2023] Open
Abstract
The generation of oxygen radicals and their derivatives, known as reactive oxygen species, (ROS) is a part of the signaling process in higher plants at lower concentrations, but at higher concentrations, those ROS cause oxidative stress. Salinity-induced osmotic stress and ionic stress trigger the overproduction of ROS and, ultimately, result in oxidative damage to cell organelles and membrane components, and at severe levels, they cause cell and plant death. The antioxidant defense system protects the plant from salt-induced oxidative damage by detoxifying the ROS and also by maintaining the balance of ROS generation under salt stress. Different plant hormones and genes are also associated with the signaling and antioxidant defense system to protect plants when they are exposed to salt stress. Salt-induced ROS overgeneration is one of the major reasons for hampering the morpho-physiological and biochemical activities of plants which can be largely restored through enhancing the antioxidant defense system that detoxifies ROS. In this review, we discuss the salt-induced generation of ROS, oxidative stress and antioxidant defense of plants under salinity.
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Affiliation(s)
- Mirza Hasanuzzaman
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
- Correspondence: (M.H.); (M.F.)
| | - Md. Rakib Hossain Raihan
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
| | - Abdul Awal Chowdhury Masud
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
| | - Khussboo Rahman
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
| | - Farzana Nowroz
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
| | - Mira Rahman
- Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh; (M.R.H.R.); (A.A.C.M.); (K.R.); (F.N.); (M.R.)
| | - Kamrun Nahar
- Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh;
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University, Miki-cho 761-0795, Japan
- Correspondence: (M.H.); (M.F.)
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29
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Piao M, Zou J, Li Z, Zhang J, Yang L, Yao N, Li Y, Li Y, Tang H, Zhang L, Yang D, Yang Z, Du X, Zuo Z. The Arabidopsis HY2 Gene Acts as a Positive Regulator of NaCl Signaling during Seed Germination. Int J Mol Sci 2021; 22:ijms22169009. [PMID: 34445714 PMCID: PMC8396667 DOI: 10.3390/ijms22169009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/30/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022] Open
Abstract
Phytochromobilin (PΦB) participates in the regulation of plant growth and development as an important synthetase of photoreceptor phytochromes (phy). In addition, Arabidopsis long hypocotyl 2 (HY2) appropriately works as a key PΦB synthetase. However, whether HY2 takes part in the plant stress response signal network remains unknown. Here, we described the function of HY2 in NaCl signaling. The hy2 mutant was NaCl-insensitive, whereas HY2-overexpressing lines showed NaCl-hypersensitive phenotypes during seed germination. The exogenous NaCl induced the transcription and the protein level of HY2, which positively mediated the expression of downstream stress-related genes of RD29A, RD29B, and DREB2A. Further quantitative proteomics showed the patterns of 7391 proteins under salt stress. HY2 was then found to specifically mediate 215 differentially regulated proteins (DRPs), which, according to GO enrichment analysis, were mainly involved in ion homeostasis, flavonoid biosynthetic and metabolic pathways, hormone response (SA, JA, ABA, ethylene), the reactive oxygen species (ROS) metabolic pathway, photosynthesis, and detoxification pathways to respond to salt stress. More importantly, ANNAT1–ANNAT2–ANNAT3–ANNAT4 and GSTU19–GSTF10–RPL5A–RPL5B–AT2G32060, two protein interaction networks specifically regulated by HY2, jointly participated in the salt stress response. These results direct the pathway of HY2 participating in salt stress, and provide new insights for the plant to resist salt stress.
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Affiliation(s)
- Mingxin Piao
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Jinpeng Zou
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China;
| | - Zhifang Li
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Junchuan Zhang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Liang Yang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Nan Yao
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Yuhong Li
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Yaxing Li
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Haohao Tang
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Li Zhang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
| | - Deguang Yang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China;
| | - Zhenming Yang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
| | - Xinglin Du
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Correspondence: (X.D.); (Z.Z.)
| | - Zecheng Zuo
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun 130062, China; (M.P.); (J.Z.); (L.Y.); (L.Z.); (Z.Y.)
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (J.Z.); (Z.L.); (N.Y.); (Y.L.); (Y.L.); (H.T.)
- Correspondence: (X.D.); (Z.Z.)
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Yan F, Wei H, Ding Y, Li W, Liu Z, Chen L, Tang S, Ding C, Jiang Y, Li G. Melatonin regulates antioxidant strategy in response to continuous salt stress in rice seedlings. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 165:239-250. [PMID: 34082330 DOI: 10.1016/j.plaphy.2021.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/04/2021] [Indexed: 05/22/2023]
Abstract
Melatonin mediates multiple physiological processes in plants and is involved in many reactions related to the protection of plants from abiotic stress. In this paper, the effect of melatonin on the antioxidant capacity of rice under salt stress was studied. Melatonin alleviated the inhibition of salt stress on the growth of rice seedlings, mainly by increasing the dry weight and fresh weight of shoots and roots. Melatonin alleviated the membrane damage caused by salt stress, which was mainly manifested by the decrease of TBARS content and the decrease of leaf and root damage. During the whole salt stress period, rice after melatonin pretreatment showed lower ROS (H2O2, O2•-,OH-) accumulation. In the early stage (1-3 d) of stress, the rice after melatonin pretreatment showed a strong increase in antioxidant enzyme activity, while in the later stage (5,7 d), it showed a strong increase in antioxidant content. During the whole period of salt stress, melatonin had a weak regulatory effect on AsA-GSH cycle. Through the above regulation process, the decreasing effect of melatonin on ROS content of rice under salt stress did not decrease with prolonged stress time in a short time (1-7 d). In conclusion, melatonin improved the antioxidant capacity of rice under continuous salt stress, and rice showed variable antioxidant strategies after melatonin pretreatment.
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Affiliation(s)
- Feiyu Yan
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China
| | - Haimin Wei
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China
| | - Yanfeng Ding
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - Weiwei Li
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China
| | - Zhenghui Liu
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - Lin Chen
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - She Tang
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - Chengqiang Ding
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - Yu Jiang
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China
| | - Ganghua Li
- College of Agriculture, Nanjing Agricultural University, Nanjing, China; Key Laboratory of Crop Physiology Ecology and Production Management, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing, China; National Engineering and Technology Center for Information Agriculture, Nanjing, China.
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31
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Jiang D, Lu B, Liu L, Duan W, Meng Y, Li J, Zhang K, Sun H, Zhang Y, Dong H, Bai Z, Li C. Exogenous melatonin improves the salt tolerance of cotton by removing active oxygen and protecting photosynthetic organs. BMC PLANT BIOLOGY 2021; 21:331. [PMID: 34246235 PMCID: PMC8272334 DOI: 10.1186/s12870-021-03082-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 05/26/2021] [Indexed: 05/23/2023]
Abstract
BACKGROUND As damage to the ecological environment continues to increase amid unreasonable amounts of irrigation, soil salinization has become a major challenge to agricultural development. Melatonin (MT) is a pleiotropic signal molecule and indole hormone, which alleviates the damage of abiotic stress to plants. MT has been confirmed to eliminate reactive oxygen species (ROS) by improving the antioxidant system and reducing oxidative damage under adversity. However, the mechanism by which exogenous MT mediates salt tolerance by regulating the photosynthetic capacity and ion balance of cotton seedlings still remains unknown. In this study, the regulatory effects of MT on the photosynthetic system, osmotic modulators, chloroplast, and anatomical structure of cotton seedlings were determined under 0-500 μM MT treatments with salt stress induced by treatment with 150 mM NaCl. RESULTS Salt stress reduces the chlorophyll content, net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, PSII photochemical efficiency, PSII actual photochemical quantum yield, the apparent electron transfer efficiency, stomata opening, and biomass. In addition, it increases non-photochemical quenching. All of these responses were effectively alleviated by exogenous treatment with MT. Exogenous MT reduces oxidative damage and lipid peroxidation by reducing salt-induced ROS and protects the plasma membrane from oxidative toxicity. MT also reduces the osmotic pressure by reducing the salt-induced accumulation of Na+ and increasing the contents of K+ and proline. Exogenous MT can facilitate stomatal opening and protect the integrity of cotton chloroplast grana lamella structure and mitochondria under salt stress, protect the photosynthetic system of plants, and improve their biomass. An anatomical analysis of leaves and stems showed that MT can improve xylem and phloem and other properties and aides in the transportation of water, inorganic salts, and organic substances. Therefore, the application of MT attenuates salt-induced stress damage to plants. Treatment with exogenous MT positively increased the salt tolerance of cotton seedlings by improving their photosynthetic capacity, stomatal characteristics, ion balance, osmotic substance biosynthetic pathways, and chloroplast and anatomical structures (xylem vessels and phloem vessels). CONCLUSIONS Our study attributes help to protect the structural stability of photosynthetic organs and increase the amount of material accumulation, thereby reducing salt-induced secondary stress. The mechanisms of MT-induced plant tolerance to salt stress provide a theoretical basis for the use of MT to alleviate salt stress caused by unreasonable irrigation, fertilization, and climate change.
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Affiliation(s)
- Dan Jiang
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Bin Lu
- College of Landscape and Tourism, Hebei Agricultural University, Baoding, 071001, China
| | - Liantao Liu
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Wenjing Duan
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Yanjun Meng
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Jin Li
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Ke Zhang
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Hongchun Sun
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Yongjiang Zhang
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Hezhong Dong
- Cotton Research Center/Key Laboratory of Cotton Breeding and Cultivation in Huang-huai-hai Plain, Ministry of Agriculture, Shandong Academy of Agricultural Sciences, Jinan, 250100, Shandong, China
| | - Zhiying Bai
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, 071001, Hebei, China.
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China.
| | - Cundong Li
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, 071001, Hebei, China.
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Altaf MA, Shahid R, Ren MX, Mora-Poblete F, Arnao MB, Naz S, Anwar M, Altaf MM, Shahid S, Shakoor A, Sohail H, Ahmar S, Kamran M, Chen JT. Phytomelatonin: An overview of the importance and mediating functions of melatonin against environmental stresses. PHYSIOLOGIA PLANTARUM 2021; 172:820-846. [PMID: 33159319 DOI: 10.1111/ppl.13262] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/09/2020] [Accepted: 10/27/2020] [Indexed: 05/06/2023]
Abstract
Recently, melatonin has gained significant importance in plant research. The presence of melatonin in the plant kingdom has been known since 1995. It is a molecule that is conserved in a wide array of evolutionary distant organisms. Its functions and characteristics have been found to be similar in both plants and animals. The review focuses on the role of melatonin pertaining to physiological functions in higher plants. Melatonin regulates physiological functions regarding auxin activity, root, shoot, and explant growth, activates germination of seeds, promotes rhizogenesis (growth of adventitious and lateral roots), and holds up impelled leaf senescence. Melatonin is a natural bio-stimulant that creates resistance in field crops against various abiotic stress, including heat, chemical pollutants, cold, drought, salinity, and harmful ultra-violet radiation. The full potential of melatonin in regulating physiological functions in higher plants still needs to be explored by further research.
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Affiliation(s)
| | - Rabia Shahid
- School of Economics, Hainan University, Haikou, China
| | - Ming-Xun Ren
- Center for Terrestrial Biodiversity of the South China Sea, College of Ecology and Environment, Hainan University, Haikou, China
| | | | - Marino B Arnao
- Department of Plant Biology (Plant Physiology), Faculty of Biology, University of Murcia, Murcia, Spain
| | - Safina Naz
- Department of Horticulture, Faculty of Agricultural Science and Technology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Anwar
- College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, China
| | | | - Sidra Shahid
- Institute for Clinical Chemistry, University Medical Center Goettingen, Goettingen, Germany
| | - Awais Shakoor
- Department of Environment and Soil Sciences, University of Lleida, Lleida, Spain
| | - Hamza Sohail
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University/Key Laboratory of Horticultural Plant Biology, Ministry of Education, Wuhan, China
| | - Sunny Ahmar
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Muhammad Kamran
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Jen-Tsung Chen
- Department of Life Sciences, National University of Kaohsiung, Kaohsiung, Taiwan
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Zulfiqar F, Ashraf M. Bioregulators: unlocking their potential role in regulation of the plant oxidative defense system. PLANT MOLECULAR BIOLOGY 2021; 105:11-41. [PMID: 32990920 DOI: 10.1007/s11103-020-01077-w] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 09/23/2020] [Indexed: 05/21/2023]
Abstract
Plant bioregulators play an important role in managing oxidative stress tolerance in plants. Utilizing their ability in stress sensitive crops through genetic engineering will be a meaningful approach to manage food production under the threat of climate change. Exploitation of the plant defense system against oxidative stress to engineer tolerant plants in the climate change scenario is a sustainable and meaningful strategy. Plant bioregulators (PBRs), which are important biotic factors, are known to play a vital role not only in the development of plants, but also in inducing tolerance in plants against various environmental extremes. These bioregulators include auxins, gibberellins, cytokinins, abscisic acid, brassinosteroids, polyamines, strigolactones, and ascorbic acid and provide protection against the oxidative stress-associated reactive oxygen species through modulation or activation of a plant's antioxidant system. Therefore, exploitation of their functioning and accumulation is of considerable significance for the development of plants more tolerant of harsh environmental conditions in order to tackle the issue of food security under the threat of climate change. Therefore, this review summarizes a new line of evidence that how PBRs act as inducers of oxidative stress resistance in plants and how they could be modulated in transgenic crops via introgression of genes. Reactive oxygen species production during oxidative stress events and their neutralization through an efficient antioxidants system is comprehensively detailed. Further, the use of exogenously applied PBRs in the induction of oxidative stress resistance is discussed. Recent advances in engineering transgenic plants with modified PBR gene expression to exploit the plant defense system against oxidative stress are discussed from an agricultural perspective.
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Affiliation(s)
- Faisal Zulfiqar
- Institute of Horticultural Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan.
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34
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Cisse EHM, Miao LF, Yang F, Huang JF, Li DD, Zhang J. Gly Betaine Surpasses Melatonin to Improve Salt Tolerance in Dalbergia odorifera. FRONTIERS IN PLANT SCIENCE 2021; 12:588847. [PMID: 33633756 PMCID: PMC7900558 DOI: 10.3389/fpls.2021.588847] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 01/19/2021] [Indexed: 05/15/2023]
Abstract
Salinity is one of the most serious factors limiting plant growth which can provoke significant losses in agricultural crop production, particularly in arid and semi-arid areas. This study aimed to investigate whether melatonin (MT; 0.05 and 0.1 mM), which has pleiotropic roles, has a better effect than glycine betaine (GB; 10 and 50 mM) on providing salt tolerance in a woody plant Dalbergia odorifera T. Chen. Also, the alternative oxidase activity (AOX) in plant subjected to MT or GB under salinity (150 and 250 mM) was evaluated given that the effect of exogenous MT or GB on AOX has not been reported yet. The results showed that the exogenous application of GB on the seedlings of D. odorifera increased the plant growth parameters, relative water content, total of chlorophyll content, and carotenoid content compared with well-watered and MT treatments. Under severe salinity, the seedlings subjected to GB showed, a significant enhancement in water use efficiency, transpiration, and net photosynthetic rate regardless to MT-treated seedlings. The levels of proline and soluble sugar in the seedlings treated with MT or GB decreased significantly under mild and severe salinity correlated with those in salt-stressed seedlings. Furthermore, GB-treated plants exhibited a significant inhibition of malondialdehyde content compared with MT-treated plants. The concentration of thiols and phenolic compounds were significantly enhanced in the leaves of seedlings treated with MT compared with those treated with GB. Under salt stress condition, GB scavenged significantly higher levels of hydrogen peroxide than MT; while under severe salinity, plants subjected to MT showed better scavenging ability for hydroxyl radicals compared with GB-treated seedlings. The results demonstrated also an enhancement of the levels of superoxide dismutase (SOD), guaiacol peroxidase, and AOX activities in seedlings treated with GB or MT compared with salt-stressed plants. The catalase activity (CAT) was increased by 0.05 mM MT and 0.1 mM GB under mild salinity. Meanwhile, the AOX activity under severe salinity was enhanced only by GB 50 mM. The findings of this study suggested that GB-treated seedlings possessed a better salt tolerance in comparison with MT-treated seedlings.
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35
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Jiang D, Lu B, Liu L, Duan W, Chen L, Li J, Zhang K, Sun H, Zhang Y, Dong H, Li C, Bai Z. Exogenous melatonin improves salt stress adaptation of cotton seedlings by regulating active oxygen metabolism. PeerJ 2020; 8:e10486. [PMID: 33365206 PMCID: PMC7735075 DOI: 10.7717/peerj.10486] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/12/2020] [Indexed: 01/09/2023] Open
Abstract
Melatonin is a small-molecule indole hormone that plays an important role in participating in biotic and abiotic stress resistance. Melatonin has been confirmed to promote the normal development of plants under adversity stress by mediating physiological regulation mechanisms. However, the mechanisms by which exogenous melatonin mediates salt tolerance via regulation of antioxidant activity and osmosis in cotton seedlings remain largely unknown. In this study, the regulatory effects of melatonin on reactive oxygen species (ROS), the antioxidant system, and osmotic modulators of cotton seedlings were determined under 0-500 µM melatonin treatments with salt stress induced by 150 mM NaCl treatment. Cotton seedlings under salt stress exhibited an inhibition of growth, excessive hydrogen peroxide (H2O2), superoxide anion (O2 -), and malondialdehyde (MDA) accumulations in leaves, increased activity levels of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX), and elevated ascorbic acid (AsA) and glutathione (GSH) content in leaves. However, the content of osmotic regulators (i.e., soluble sugars and proteins) in leaves was reduced under salt stress. This indicates high levels of ROS were produced, and the cell membrane was damaged. Additionally, osmotic regulatory substance content was reduced, resulting in osmotic stress, which seriously affected cotton seedling growth under salt stress. However, exogenous melatonin at different concentrations reduced the contents of H2O2, O2 -, and MDA in cotton leaves, increased the activity of antioxidant enzymes and the content of reductive substances (i.e., AsA and GSH), and promoted the accumulation of osmotic regulatory substances in leaves under salt stress. These results suggest that melatonin can inhibit ROS production in cotton seedlings, improve the activity of the antioxidant enzyme system, raise the content of osmotic regulation substances, reduce the level of membrane lipid peroxidation, and protect the integrity of the lipid membrane under salt stress, which reduces damage caused by salt stress to seedlings and effectively enhances inhibition of salt stress on cotton seedling growth. These results indicate that 200 µM melatonin treatment has the best effect on the growth and salt tolerance of cotton seedlings.
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Affiliation(s)
- Dan Jiang
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, China.,State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Bin Lu
- College of Landscape and Tourism, Hebei Agricultrual University, Baoding, China
| | - Liantao Liu
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Wenjing Duan
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, China.,State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Li Chen
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, China.,State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Jin Li
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, China
| | - Ke Zhang
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Hongchun Sun
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Yongjiang Zhang
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Hezhong Dong
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China.,Cotton Research Center/Key Laboratory of Cotton Breeding and Cultivation in Huang-huai-hai Plain, Ministry of Agriculture, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Cundong Li
- State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Zhiying Bai
- State Key Laboratory of North China Crop Improvement and Regulation/College of Life Science, Hebei Agricultural University, Baoding, China.,State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Hebei Agricultural University, Baoding, China
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36
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Liu J, Shabala S, Zhang J, Ma G, Chen D, Shabala L, Zeng F, Chen ZH, Zhou M, Venkataraman G, Zhao Q. Melatonin improves rice salinity stress tolerance by NADPH oxidase-dependent control of the plasma membrane K + transporters and K + homeostasis. PLANT, CELL & ENVIRONMENT 2020; 43:2591-2605. [PMID: 32196121 DOI: 10.1111/pce.13759] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 05/18/2023]
Abstract
This study aimed to reveal the mechanistic basis of the melatonin-mediated amelioration of salinity stress in plants. Electrophysiological experiments revealed that melatonin decreased salt-induced K+ efflux (a critical determinant of plant salt tolerance) in a dose- and time-dependent manner and reduced sensitivity of the plasma membrane K+ -permeable channels to hydroxyl radicals. These beneficial effects of melatonin were abolished by NADPH oxidase blocker DPI. Transcriptome analyses revealed that melatonin induced 585 (448 up- and 137 down-regulated) and 59 (54 up- and 5 down-regulated) differentially expressed genes (DEGs) in the root tip and mature zone, respectively. The most noticeable changes in the root tip were melatonin-induced increase in the expression of several DEGs encoding respiratory burst NADPH oxidases (OsRBOHA and OsRBOHF), calcineurin B-like/calcineurin B-like-interacting protein kinase (OsCBL/OsCIPK), and calcium-dependent protein kinase (OsCDPK) under salt stress. Melatonin also enhanced the expression of potassium transporter genes (OsAKT1, OsHAK1, and OsHAK5). Taken together, these results indicate that melatonin improves salt tolerance in rice by enabling K+ retention in roots, and that the latter process is conferred by melatonin scavenging of hydroxyl radicals and a concurrent OsRBOHF-dependent ROS signalling required to activate stress-responsive genes and increase the expression of K+ uptake transporters in the root tip.
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Affiliation(s)
- Juan Liu
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Sergey Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
| | - Jing Zhang
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
| | - Guohui Ma
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Dandan Chen
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
| | - Lana Shabala
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Fanrong Zeng
- Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Zhong-Hua Chen
- School of Science, Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
- Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou, China
| | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Tasmania, Australia
| | - Gayatri Venkataraman
- Plant Molecular Biology Laboratory, M.S. Swaminathan Research Foundation, III Cross Street, Taramani Institutional Area, Chennai, India
| | - Quanzhi Zhao
- Collaborative Innovation Centre of Henan Grain Crops, Henan Key Laboratory of Rice Biology, Henan Agricultural University, Zhengzhou, China
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Ibrahim MFM, Elbar OHA, Farag R, Hikal M, El-Kelish A, El-Yazied AA, Alkahtani J, El-Gawad HGA. Melatonin Counteracts Drought Induced Oxidative Damage and Stimulates Growth, Productivity and Fruit Quality Properties of Tomato Plants. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1276. [PMID: 32998250 PMCID: PMC7601691 DOI: 10.3390/plants9101276] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/06/2020] [Accepted: 09/21/2020] [Indexed: 01/19/2023]
Abstract
Melatonin "N-Acetyl-5-methoxytryptamine" (MT) has recently been considered as a new plant growth regulator with multiple physiological functions. Although many previous studies have confirmed that exogenous applied-MT can alleviate the deleterious effects of drought stress in many plant species, most of these studies were exclusive on seeds, seedlings, and young plants for a short period of their life cycles. Therefore, the knowledge of using MT as a potential promising agricultural foliar application to improve crop productivity and quality is still insufficient under adverse open field conditions. In this study, we investigated the effect of MT as a foliar application at 0, 20, and 40 ppm on tomato plants that were grown in the open field under the long term of optimal and deficit irrigation conditions. The results indicated that exogenous MT significantly enhanced plant growth, chlorophyll and activities of antioxidant enzymes, including ascorbate peroxidase (APX), catalase (CAT), and peroxidase (POX). This improvement was associated with a marked reduction in proline and soluble sugars. In addition, applied-MT worked as a protective agent against oxidative damage by reducing the cellular content of toxic substances such as H2O2 and malondialdehyde (MDA). Similarly, MT-treated plants showed greater total fruit yield with improving its quality attributes like total soluble solids (TSS), ascorbic acid, and lycopene. Generally, the highest significant fruit yield either under well-watered (13.7%) or water deficit (37.4%) conditions was achieved by the treatment of 20 ppm MT. These results indicate that exogenous MT played an essential role in enhancing tomato tolerance to deficit irrigation and could be recommended as a promising agricultural treatment under such conditions.
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Affiliation(s)
- Mohamed F. M. Ibrahim
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt; (O.H.A.E.); (R.F.)
| | - Ola H. Abd Elbar
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt; (O.H.A.E.); (R.F.)
| | - Reham Farag
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt; (O.H.A.E.); (R.F.)
| | - Mohamed Hikal
- Department of Biochemistry, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt;
| | - Amr El-Kelish
- Botany Department, Faculty of Science, Suez Canal University Ismailia, 41522 Ismailia, Egypt
| | - Ahmed Abou El-Yazied
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt;
| | - Jawaher Alkahtani
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Hany G. Abd El-Gawad
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, 11566 Cairo, Egypt;
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Tan DX, Reiter RJ. An evolutionary view of melatonin synthesis and metabolism related to its biological functions in plants. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:4677-4689. [PMID: 32413108 DOI: 10.1093/jxb/eraa235] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/07/2020] [Indexed: 05/22/2023]
Abstract
Plant melatonin research is a rapidly developing field. A variety of isoforms of melatonin's biosynthetic enzymes are present in different plants. Due to the different origins, they exhibit independent responses to the variable environmental stimuli. The locations for melatonin biosynthesis in plants are chloroplasts and mitochondria. These organelles have inherited their melatonin biosynthetic capacities from their bacterial ancestors. Under ideal conditions, chloroplasts are the main sites of melatonin biosynthesis. If the chloroplast pathway is blocked for any reason, the mitochondrial pathway will be activated for melatonin biosynthesis to maintain its production. Melatonin metabolism in plants is a less studied field; its metabolism is quite different from that of animals even though they share similar metabolites. Several new enzymes for melatonin metabolism in plants have been cloned and these enzymes are absent in animals. It seems that the 2-hydroxymelatonin is a major metabolite of melatonin in plants and its level is ~400-fold higher than that of melatonin. In the current article, from an evolutionary point of view, we update the information on plant melatonin biosynthesis and metabolism. This review will help the reader to understand the complexity of these processes and promote research enthusiasm in these fields.
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Affiliation(s)
| | - Russel J Reiter
- Department of Anatomy and Cell System, UT Health San Antonio, San Antonio, Texas, USA
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Ahmad S, Su W, Kamran M, Ahmad I, Meng X, Wu X, Javed T, Han Q. Foliar application of melatonin delay leaf senescence in maize by improving the antioxidant defense system and enhancing photosynthetic capacity under semi-arid regions. PROTOPLASMA 2020; 257:1079-1092. [PMID: 32146513 DOI: 10.1007/s00709-020-01491-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/14/2020] [Indexed: 05/23/2023]
Abstract
Melatonin is an important plant growth regulator which plays a key role in plant growth and development. The objective of the current research was to evaluate the effect of foliar application of melatonin (MF) on photosynthetic efficiency, antioxidant defense mechanism, and its relation with leaf senescence in maize crop grown in a semi-arid region. A field experiment was conducted during 2017 and 2018 growth season, where melatonin was applied to the foliage at concentrations of 0 (MF0), 25 (MF1), 50 (MF2), and 75 (MF3) μM at the ninth leaf stage. Foliar application of melatonin significantly improved chlorophyll content, net photosynthetic rate, soluble sugar content, and soluble protein content during the process of leaf senescence. The application of melatonin also enhanced antioxidant enzyme activities including superoxide dismutase, catalase, and peroxidase, while reduced malondialdehyde and reactive oxygen species accumulation. Melatonin foliar application also increased total leaf area per plant, grains per ear, thousand grain weight and grain yield of maize crop in a semi-arid region. The application of melatonin significantly improved photosynthetic activity, antioxidant defense mechanism, and yield of maize crop in a semi-arid region, where the most effective treatment was MF2.
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Affiliation(s)
- Shakeel Ahmad
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China.
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Wennan Su
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Muhammad Kamran
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Irshad Ahmad
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiangping Meng
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaorong Wu
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Tehseen Javed
- College of Water Resources and Architectural Engineering, Northwest Agriculture & Forestry University, Yangling, China
| | - Qingfang Han
- Key Laboratory of Crop Physio-ecology and Tillage in Northwestern Loess Plateau, Ministry of Agriculture/College of Agronomy, Northwest A & F University, Yangling, 712100, Shaanxi, China.
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education/Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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40
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Akula R, Mukherjee S. New insights on neurotransmitters signaling mechanisms in plants. PLANT SIGNALING & BEHAVIOR 2020; 15:1737450. [PMID: 32375557 PMCID: PMC8570756 DOI: 10.1080/15592324.2020.1737450] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/23/2020] [Accepted: 02/25/2020] [Indexed: 05/31/2023]
Abstract
Neurotransmitters (NTs) such as acetylcholine, biogenic amines (dopamine, noradrenaline, adrenaline, histamine), indoleamines [(melatonin (MEL) & serotonin (SER)] have been found not only in mammalians, but also in diverse living organisms-microorganisms to plants. These NTs have emerged as potential signaling molecules in the last decade of investigations in various plant systems. NTs have been found to play important roles in plant life including-organogenesis, flowering, ion permeability, photosynthesis, circadian rhythm, reproduction, fruit ripening, photomorphogenesis, adaptation to environmental changes. This review will provide an overview of recent advancements on the physiological and molecular mechanism of NTs in plants. Moreover, molecular crosstalk of SER and MEL with various biomolecules is also discussed. The study of these NTs may serve as new understanding of the mechanisms of signal transmission and cell sensing in plants subjected to various environmental stimulus.
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Affiliation(s)
- Ramakrishna Akula
- Bayer Crop Science division, Vegetable R & D Department, Chikkaballapur, India
| | - Soumya Mukherjee
- Department of Botany, Jangipur College, University of Kalyani, Kalyani, India
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Melatonin: Awakening the Defense Mechanisms during Plant Oxidative Stress. PLANTS 2020; 9:plants9040407. [PMID: 32218185 PMCID: PMC7238205 DOI: 10.3390/plants9040407] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/08/2020] [Accepted: 03/17/2020] [Indexed: 12/20/2022]
Abstract
Melatonin is a multifunctional signaling molecule that is ubiquitously distributed in different parts of a plant and responsible for stimulating several physio-chemical responses to adverse environmental conditions. In this review, we show that, although plants are able to biosynthesize melatonin, the exogenous application of melatonin to various crops can improve plant growth and development in response to various abiotic and biotic stresses (e.g., drought, unfavorable temperatures, high salinity, heavy metal contamination, acid rain, and combined stresses) by regulating antioxidant machinery of plants. Current knowledge suggests that exogenously applied melatonin can enhance the stress tolerance of plants by regulating both the enzymatic and non-enzymatic antioxidant defense systems. Enzymic antioxidants upregulated by exogenous melatonin include superoxide dismutase, catalase, glutathione peroxidase, and enzymes involved in the ascorbate–glutathione cycle (ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase), whereas levels of non-enzymatic antioxidants such as ascorbate, reduced glutathione, carotenoids, tocopherols, and phenolics are also higher under stress conditions. The enhanced antioxidant system consequently exhibits lower lipid peroxidation and greater plasma membrane integrity when under stress. However, these responses vary greatly from crop to crop and depend on the intensity and type of stress, and most studies to date have been conducted under controlled conditions. This means that a wider range of crop field trials and detailed transcriptomic analysis are required to reveal the gene regulatory networks involved in the between melatonin, antioxidants, and abiotic stress.
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Chen L, Liu L, Lu B, Ma T, Jiang D, Li J, Zhang K, Sun H, Zhang Y, Bai Z, Li C. Exogenous melatonin promotes seed germination and osmotic regulation under salt stress in cotton (Gossypium hirsutum L.). PLoS One 2020; 15:e0228241. [PMID: 32004326 PMCID: PMC6994006 DOI: 10.1371/journal.pone.0228241] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 01/11/2020] [Indexed: 11/18/2022] Open
Abstract
Melatonin (MT; N-acetyI-5-methoxytryptamine) is an amine hormone involved in abiotic stress resistance. Previous studies have confirmed that melatonin can promote seed germination, mediate physiological regulation mechanisms, and stimulate crop growth under stress. However, the osmotic regulation mechanism by which exogenous melatonin mediates salt tolerance in cotton is still largely unknown. To investigate the effect of salt stress on melatonin concentration in germinating cotton seeds, we analyzed melatonin content over time during seed germination under different treatments. Melatonin content reached its minimum at day 6, while cotton germination rates peaked at day 6, indicating melatonin content and seed germination are correlated. Then we investigated the effects of 10-100 μM melatonin treatments on membrane lipid peroxides and osmotic adjustment substances during cotton seed germination under salt stress. Salt stress led to electrolyte leakage (EL) as well as accumulations of hydrogen peroxide (H2O2), malondialdehyde (MDA), organic osmotic substances (i.e., proline, soluble sugars), and inorganic osmotic substances (i.e., Na+, Cl-). Meanwhile, the contents of melatonin, soluble proteins, and K+ as well as the K+/Na+ balance decreased, indicating that salt stress inhibited melatonin synthesis and damaged cellular membranes, seriously affecting seed germination. However, melatonin pretreatment at different concentrations alleviated the adverse effects of salt stress on cotton seeds and reduced EL as well as the contents of H2O2, MDA, Na+, and Cl-. The exogenous application of melatonin also promoted melatonin, soluble sugar, soluble proteins, proline, and K+/Na+ contents under salt stress. These results demonstrate that supplemental melatonin can effectively ameliorate the repression of cotton seed germination by enhancing osmotic regulating substances and adjusting ion homeostasis under salt stress. Thus, melatonin may potentially be used to protect cotton seeds from salt stress, with the 20 μM melatonin treatment most effectively promoting cotton seed germination and improving salt stress tolerance.
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Affiliation(s)
- Li Chen
- College of Life Science, Hebei Agricultural University, Baoding, China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Liantao Liu
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Bin Lu
- College of Landscape and Tourism, Hebei Agricultural University, Baoding, China
| | - Tongtong Ma
- College of Life Science, Hebei Agricultural University, Baoding, China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Dan Jiang
- College of Life Science, Hebei Agricultural University, Baoding, China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Jin Li
- College of Life Science, Hebei Agricultural University, Baoding, China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
| | - Ke Zhang
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Hongchun Sun
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Yongjiang Zhang
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- College of Agronomy, Hebei Agricultural University, Baoding, China
| | - Zhiying Bai
- College of Life Science, Hebei Agricultural University, Baoding, China
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- * E-mail: (ZB); (CL)
| | - Cundong Li
- Key Laboratory of Crop Growth Regulation of Hebei Province, Hebei Agricultural University, Baoding, Hebei, China
- College of Agronomy, Hebei Agricultural University, Baoding, China
- * E-mail: (ZB); (CL)
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Melatonin as a Chemical Substance or as Phytomelatonin Rich-Extracts for Use as Plant Protector and/or Biostimulant in Accordance with EC Legislation. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9100570] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine) is a ubiquitous molecule present in animals and plants, and also in bacteria and fungi. In plants, it has an important regulatory and protective role in the face of different stress situations in which it can be involved, mainly due to its immobility. Both in the presence of biotic and abiotic stressors, melatonin exerts protective action in which, through significant changes in gene expression, it activates a stress tolerance response. Its anti-stress role, along with other outstanding functions, suggests its possible use in active agricultural management. This review establishes considerations that are necessary for its possible authorization. The particular characteristics of this substance and its categorization as plant biostimulant are discussed, and also the different legal aspects within the framework of the European Community. The advantages and disadvantages are also described of two of its possible applications, as a plant protector or biostimulant, in accordance with legal provisions.
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