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Wang L, Lin Y, Hou G, Yang M, Peng Y, Jiang Y, He C, She M, Chen Q, Li M, Zhang Y, Zhang Y, Wang Y, He W, Wang X, Tang H, Luo Y. A histone deacetylase, FaSRT1-2, plays multiple roles in regulating fruit ripening, plant growth and stresses resistance of cultivated strawberry. PLANT, CELL & ENVIRONMENT 2024; 47:2258-2273. [PMID: 38482979 DOI: 10.1111/pce.14885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 04/30/2024]
Abstract
Sirtuins (SRTs) are a group of nicotinamide adenine dinucleotide (NAD+)-dependent deacetylase that target both histone and nonhistone proteins. The biological function of SRT in horticultural plants has been rarely studied. In this study, FaSRT1-2 was identified as a key member of the 8 FaSRTs encoded in cultivated strawberry genome. Transient overexpression of FaSRT1-2 in strawberry fruit accelerated ripening, increased the content of anthocyanins and sugars, enhanced ripening-related gene expression. Moreover, stable transformation of FaSRT1-2 in strawberry plants resulted in enhanced vegetative growth, increased sensitivity to heat stress and increased susceptibility to Botrytis cinerea infection. Interestingly, knocking out the homologous gene in woodland strawberry had the opposite effects. Additionally, we found the content of stress-related hormone abscisic acid (ABA) was decreased, while the growth-related gibberellin (GA) concentration was increased in FaSRT1-2 overexpression lines. Gene expression analysis revealed induction of heat shock proteins, transcription factors, stress-related and antioxidant genes in the FaSRT1-2-overexpressed plants while knocked-out of the gene had the opposite impact. In conclusion, our findings demonstrated that FaSRT1-2 could positively promote strawberry plant vegetative growth and fruit ripening by affecting ABA and GA pathways. However, it negatively regulates the resistance to heat stress and B. cinerea infection by influencing the related gene expression.
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Affiliation(s)
- Liangxin Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuanxiu Lin
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Guoyan Hou
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Min Yang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuting Peng
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yuyan Jiang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Caixia He
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Musha She
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mengyao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yunting Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Wen He
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaorong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Haoru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu, Sichuan, China
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Gautam H, Khan S, Nidhi, Sofo A, Khan NA. Appraisal of the Role of Gaseous Signaling Molecules in Thermo-Tolerance Mechanisms in Plants. PLANTS (BASEL, SWITZERLAND) 2024; 13:791. [PMID: 38592775 PMCID: PMC10975175 DOI: 10.3390/plants13060791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/19/2024] [Accepted: 03/09/2024] [Indexed: 04/11/2024]
Abstract
A significant threat to the ongoing rise in temperature caused by global warming. Plants have many stress-resistance mechanisms, which is responsible for maintaining plant homeostasis. Abiotic stresses largely increase gaseous molecules' synthesis in plants. The study of gaseous signaling molecules has gained attention in recent years. The role of gaseous molecules, such as nitric oxide (NO), hydrogen sulfide (H2S), carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), and ethylene, in plants under temperature high-temperature stress are discussed in the current review. Recent studies revealed the critical function that gaseous molecules play in controlling plant growth and development and their ability to respond to various abiotic stresses. Here, we provide a thorough overview of current advancements that prevent heat stress-related plant damage via gaseous molecules. We also explored and discussed the interaction of gaseous molecules. In addition, we provided an overview of the role played by gaseous molecules in high-temperature stress responses, along with a discussion of the knowledge gaps and how this may affect the development of high-temperature-resistant plant species.
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Affiliation(s)
- Harsha Gautam
- 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
| | - Nidhi
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - Adriano Sofo
- Department of European and Mediterranean Cultures: Architecture, Environment, Cultural Heritage (DiCEM), University of Basilicata, 75100 Matera, Italy
| | - Nafees A. Khan
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Aligarh Muslim University, Aligarh 202002, India
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Cao Y, Chen Y, Cheng N, Zhang K, Duan Y, Fang S, Shen Q, Yang X, Fang W, Zhu X. CsCuAO1 Associated with CsAMADH1 Confers Drought Tolerance by Modulating GABA Levels in Tea Plants. Int J Mol Sci 2024; 25:992. [PMID: 38256065 PMCID: PMC10815580 DOI: 10.3390/ijms25020992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/27/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Our previous study showed that COPPER-CONTAINING AMINE OXIDASE (CuAO) and AMINOALDEHYDE DEHYDROGENASE (AMADH) could regulate the accumulation of γ-aminobutyric acid (GABA) in tea through the polyamine degradation pathway. However, their biological function in drought tolerance has not been determined. In this study, Camellia sinensis (Cs) CsCuAO1 associated with CsAMADH1 conferred drought tolerance, which modulated GABA levels in tea plants. The results showed that exogenous GABA spraying effectively alleviated the drought-induced physical damage. Arabidopsis lines overexpressing CsCuAO1 and CsAMADH1 exhibited enhanced resistance to drought, which promoted the synthesis of GABA and putrescine by stimulating reactive oxygen species' scavenging capacity and stomatal movement. However, the suppression of CsCuAO1 or CsAMADH1 in tea plants resulted in increased sensitivity to drought treatment. Moreover, co-overexpressing plants increased GABA accumulation both in an Agrobacterium-mediated Nicotiana benthamiana transient assay and transgenic Arabidopsis plants. In addition, a GABA transporter gene, CsGAT1, was identified, whose expression was strongly correlated with GABA accumulation levels in different tissues under drought stress. Taken together, CsCuAO1 and CsAMADH1 were involved in the response to drought stress through a dynamic GABA-putrescine balance. Our data will contribute to the characterization of GABA's biological functions in response to environmental stresses in plants.
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Affiliation(s)
- Yu Cao
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Yiwen Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Nuo Cheng
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Kexin Zhang
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Yu Duan
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Shimao Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
- Tea Research Institute, Guizhou Provincial Academy of Agricultural Sciences, Guiyang 417100, China; (Q.S.); (X.Y.)
| | - Qiang Shen
- Tea Research Institute, Guizhou Provincial Academy of Agricultural Sciences, Guiyang 417100, China; (Q.S.); (X.Y.)
| | - Xiaowei Yang
- Tea Research Institute, Guizhou Provincial Academy of Agricultural Sciences, Guiyang 417100, China; (Q.S.); (X.Y.)
| | - Wanping Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
| | - Xujun Zhu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.C.); (Y.C.); (N.C.); (K.Z.); (Y.D.); (S.F.); (W.F.)
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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: 0] [Impact Index Per Article: 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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Feijó ADR, Viana VE, Balbinot A, Fipke MV, Souza GM, do Amarante L, Avila LAD. Water Deficit at Vegetative Stage Induces Tolerance to High Temperature during Anthesis in Rice. PLANTS (BASEL, SWITZERLAND) 2023; 12:3133. [PMID: 37687380 PMCID: PMC10490413 DOI: 10.3390/plants12173133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/22/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023]
Abstract
BACKGROUND Crop yields have been affected by many different biotic and abiotic factors. Generally, plants experience more than one stress during their life cycle, and plants can tolerate multiple stresses and develop cross-tolerance. The expected rise in atmospheric CO2 concentration ([CO2]) can contribute to cross-tolerance. Priming is a strategy to increase yield or to maintain yield under stress conditions. Thus, our objective was to evaluate if priming the rice plants with water deficit during the vegetative stage can induce tolerance to heat stress at anthesis and to evaluate the contribution of e[CO2]. METHODS The experiment was arranged in a completely randomized design in a factorial arrangement. Factor A consisted of the following treatments: water deficit at four-leaf stage (no-stress, and drought stress), heat at anthesis (normal temperature, high temperature), and priming with water deficit at four-leaf stage and heat stress at anthesis; and Factor B was two [CO2] treatments: a[CO2] = 400 ± 40 μmol mol-1 and e[CO2] = 700 ± 40 μmol mol-1. We assessed the effect of the treatments on plant growth, yield, biochemical, and transcriptome alterations. RESULTS Although e[CO2] affected rice growth parameters, it did not affect the priming effect. Primed plants showed an increase in yield and number of panicles per plant. Primed plants showed upregulation of OsHSP16.9A, OsHSP70.1, and OsHSP70.6. These results showed induced cross-tolerance. CONCLUSIONS Water deficit at the rice vegetative stage reduces the effect of heat stress at the reproductive stage. Water deficit at the vegetative stage can be used, after further testing in field conditions, to reduce the effect of heat stress during flowering in rice.
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Affiliation(s)
- Anderson da Rosa Feijó
- Plant Physiology Graduate Program, Federal University of Pelotas, Pelotas 96160-000, Brazil
| | - Vívian Ebeling Viana
- Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96015-560, Brazil
| | - Andrisa Balbinot
- Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96015-560, Brazil
| | - Marcus Vinicius Fipke
- Crop Protection Graduate Program, Federal University of Pelotas, Pelotas 96015-560, Brazil
| | - Gustavo Maia Souza
- Plant Physiology Graduate Program, Federal University of Pelotas, Pelotas 96160-000, Brazil
| | - Luciano do Amarante
- Plant Physiology Graduate Program, Federal University of Pelotas, Pelotas 96160-000, Brazil
| | - Luis Antonio de Avila
- Department of Soil and Crop Sciences, Mississippi State University, Mississippi State, MS 39762, USA
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6
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Hasan MK, Xing QF, Zhou CY, Wang KX, Xu T, Yang P, Qi ZY, Shao SJ, Ahammed GJ, Zhou J. Melatonin mediates elevated carbon dioxide-induced photosynthesis and thermotolerance in tomato. J Pineal Res 2023; 74:e12858. [PMID: 36732033 DOI: 10.1111/jpi.12858] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/11/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023]
Abstract
Increasing carbon dioxide (CO2 ) promotes photosynthesis and mitigates heat stress-induced deleterious effects on plants, but the regulatory mechanisms remain largely unknown. Here, we found that tomato (Solanum lycopersicum L.) plants treated with high atmospheric CO2 concentrations (600, 800, and 1000 µmol mol-1 ) accumulated increased levels of melatonin (N-acetyl-5-methoxy tryptamine) in their leaves and this response is conserved across many plant species, including Arabidopsis, rice, wheat, mustard, cucumber, watermelon, melon, and hot pepper. Elevated CO2 (eCO2 ; 800 µmol mol-1 ) caused a 6.8-fold increase in leaf melatonin content, and eCO2 -induced melatonin biosynthesis preferentially occurred through chloroplast biosynthetic pathways in tomato plants. Crucially, manipulation of endogenous melatonin levels by genetic means affected the eCO2 -induced accumulation of sugar and starch in tomato leaves. Furthermore, net photosynthetic rate, maximum photochemical efficiency of photosystem II, and transcript levels of chloroplast- and nuclear-encoded photosynthetic genes, such as rbcL, rbcS, rbcA, psaD, petB, and atpA, significantly increased in COMT1 overexpressing (COMT1-OE) tomato plants, but not in melatonin-deficient comt1 mutants at eCO2 conditions. While eCO2 enhanced plant tolerance to heat stress (42°C) in wild-type and COMT1-OE, melatonin deficiency compromised eCO2 -induced thermotolerance in comt1 plants. The expression of heat shock proteins genes increased in COMT1-OE but not in comt1 plants in response to eCO2 under heat stress. Further analysis revealed that eCO2 -induced thermotolerance was closely linked to the melatonin-dependent regulation of reactive oxygen species, redox homeostasis, cellular protein protection, and phytohormone metabolism. This study unveiled a crucial mechanism of elevated CO2 -induced thermotolerance in which melatonin acts as an essential endogenous signaling molecule in tomato plants.
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Affiliation(s)
- Md Kamrul Hasan
- Hainan Institute, Zhejiang University, Sanya, China
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Qu-Fan Xing
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Can-Yu Zhou
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Kai-Xin Wang
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Tong Xu
- Hainan Institute, Zhejiang University, Sanya, China
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Ping Yang
- Agricultural Experiment Station, Zhejiang University, Hangzhou, China
| | - Zhen-Yu Qi
- Hainan Institute, Zhejiang University, Sanya, China
- Agricultural Experiment Station, Zhejiang University, Hangzhou, China
| | - Shu-Jun Shao
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
| | - Golam Jalal Ahammed
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, China
- Henan International Joint Laboratory of Stress Resistance Regulation and Safe Production of Protected Vegetables, Henan University of Science and Technology, Luoyang, China
| | - Jie Zhou
- Hainan Institute, Zhejiang University, Sanya, China
- Department of Horticulture, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zijingang Campus, Zhejiang University, Hangzhou, China
- Key Laboratory of Horticultural Plants Growth, Development and Quality Improvement, Ministry of Agriculture of China, Hangzhou, China
- Shandong (Linyi) Institute of Modern Agriculture, Zhejiang University, Linyi, China
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Tokić M, Leljak Levanić D, Ludwig-Müller J, Bauer N. Growth and Molecular Responses of Tomato to Prolonged and Short-Term Heat Exposure. Int J Mol Sci 2023; 24:ijms24054456. [PMID: 36901887 PMCID: PMC10002527 DOI: 10.3390/ijms24054456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/18/2023] [Accepted: 02/20/2023] [Indexed: 03/12/2023] Open
Abstract
Tomatoes are one of the most important vegetables for human consumption. In the Mediterranean's semi-arid and arid regions, where tomatoes are grown in the field, global average surface temperatures are predicted to increase. We investigated tomato seed germination at elevated temperatures and the impact of two different heat regimes on seedlings and adult plants. Selected exposures to 37 °C and heat waves at 45 °C mirrored frequent summer conditions in areas with a continental climate. Exposure to 37 °C or 45 °C differently affected seedlings' root development. Both heat stresses inhibited primary root length, while lateral root number was significantly suppressed only after exposure to 37 °C. Heat stress treatments induced significant accumulation of indole-3-acetic acid (IAA) and reduced abscisic acid (ABA) levels in seedlings. As opposed to the heat wave treatment, exposure to 37 °C increased the accumulation of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), which may have been involved in the root architecture modification of seedlings. Generally, more drastic phenotypic changes (chlorosis and wilting of leaves and bending of stems) were found in both seedlings and adult plants after the heat wave-like treatment. This was also reflected by proline, malondialdehyde and heat shock protein HSP90 accumulation. The gene expression of heat stress-related transcription factors was perturbed and DREB1 was shown to be the most consistent heat stress marker.
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Affiliation(s)
- Mirta Tokić
- Department of Molecular Biology, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - Dunja Leljak Levanić
- Department of Molecular Biology, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | | | - Nataša Bauer
- Department of Molecular Biology, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: ; Tel.: +385-1-4606263
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Zhao M, Jin J, Wang J, Gao T, Luo Y, Jing T, Hu Y, Pan Y, Lu M, Schwab W, Song C. Eugenol functions as a signal mediating cold and drought tolerance via UGT71A59-mediated glucosylation in tea plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 109:1489-1506. [PMID: 34931743 DOI: 10.1111/tpj.15647] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/10/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Cold and drought stress are the most critical stresses encountered by crops and occur simultaneously under field conditions. However, it is unclear whether volatiles contribute to both cold and drought tolerance, and if so, by what mechanisms they act. Here, we show that airborne eugenol can be taken up by the tea (Camellia sinensis) plant and metabolized into glycosides, thus enhancing cold and drought tolerance of tea plants. A uridine diphosphate (UDP)-glucosyltransferase, UGT71A59, was discovered, whose expression is strongly induced by multiple abiotic stresses. UGT71A59 specifically catalyzes glucosylation of eugenol glucoside in vitro and in vivo. Suppression of UGT71A59 expression in tea reduced the accumulation of eugenol glucoside, lowered reactive oxygen species (ROS) scavenging capacity, and ultimately impaired cold and drought stress tolerance. Exposure to airborne eugenol triggered a marked increase in UGT71A59 expression, eugenol glucoside accumulation, and cold tolerance by modulating ROS accumulation and CBF1 expression. It also promoted drought tolerance by altering abscisic acid homeostasis and stomatal closure. CBF1 and CBF3 play positive roles in eugenol-induced cold tolerance and CBF2 may be a negative regulator of eugenol-induced cold tolerance in tea plants. These results provide evidence that eugenol functions as a signal in cold and drought tolerance regulation and shed new light on the biological functions of volatiles in the response to multiple abiotic stresses in plants.
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Affiliation(s)
- Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Jingming Wang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Yu Luo
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Yutong Hu
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Yuting Pan
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Mengqian Lu
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising, 85354, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, P.R. China
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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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Jan R, Kim N, Lee SH, Khan MA, Asaf S, Lubna, Park JR, Asif S, Lee IJ, Kim KM. Enhanced Flavonoid Accumulation Reduces Combined Salt and Heat Stress Through Regulation of Transcriptional and Hormonal Mechanisms. FRONTIERS IN PLANT SCIENCE 2021; 12:796956. [PMID: 34992623 PMCID: PMC8724123 DOI: 10.3389/fpls.2021.796956] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 11/24/2021] [Indexed: 07/22/2023]
Abstract
Abiotic stresses, such as salt and heat stress, coexist in some regions of the world and can have a significant impact on agricultural plant biomass and production. Rice is a valuable crop that is susceptible to salt and high temperatures. Here, we studied the role of flavanol 3-hydroxylase in response to combined salt and heat stress with the aim of better understanding the defensive mechanism of rice. We found that, compared with wild-type plants, the growth and development of transgenic plants were improved due to higher biosynthesis of kaempferol and quercetin. Furthermore, we observed that oxidative stress was decreased in transgenic plants compared with that in wild-type plants due to the reactive oxygen species scavenging activity of kaempferol and quercetin as well as the modulation of glutathione peroxidase and lipid peroxidase activity. The expression of high-affinity potassium transporter (HKT) and salt overly sensitive (SOS) genes was significantly increased in transgenic plants compared with in control plants after 12 and 24 h, whereas sodium-hydrogen exchanger (NHX) gene expression was significantly reduced in transgenic plants compared with in control plants. The expression of heat stress transcription factors (HSFs) and heat shock proteins (HSPs) in the transgenic line increased significantly after 6 and 12 h, although our understanding of the mechanisms by which the F3H gene regulates HKT, SOS, NHX, HSF, and HSP genes is limited. In addition, transgenic plants showed higher levels of abscisic acid (ABA) and lower levels of salicylic acid (SA) than were found in control plants. However, antagonistic cross talk was identified between these hormones when the duration of stress increased; SA accumulation increased, whereas ABA levels decreased. Although transgenic lines showed significantly increased Na+ ion accumulation, K+ ion accumulation was similar in transgenic and control plants, suggesting that increased flavonoid accumulation is crucial for balancing Na+/K+ ions. Overall, this study suggests that flavonoid accumulation increases the tolerance of rice plants to combined salt and heat stress by regulating physiological, biochemical, and molecular mechanisms.
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Affiliation(s)
- Rahmatullah Jan
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
- Coastal Agriculture Research Institute, Kyungpook National University, Daegu, South Korea
| | - Nari Kim
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Seo-Ho Lee
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Muhammad Aaqil Khan
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Sajjad Asaf
- Natural and Medical Science Research Center, University of Nizwa, Nizwa, Oman
| | - Lubna
- Department of Botany, Garden Campus, Abdul Wali Khan University, Mardan, Pakistan
| | - Jae-Ryoung Park
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Saleem Asif
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - In-Jung Lee
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
| | - Kyung-Min Kim
- Division of Plant Biosciences, School of Applied Biosciences, College of Agriculture and Life Science, Kyungpook National University, Daegu, South Korea
- Coastal Agriculture Research Institute, Kyungpook National University, Daegu, South Korea
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11
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Ahammed GJ, Guang Y, Yang Y, Chen J. Mechanisms of elevated CO 2-induced thermotolerance in plants: the role of phytohormones. PLANT CELL REPORTS 2021; 40:2273-2286. [PMID: 34269828 DOI: 10.1007/s00299-021-02751-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 06/29/2021] [Indexed: 05/20/2023]
Abstract
Rising atmospheric CO2 is a key driver of climate change, intensifying drastic changes in meteorological parameters. Plants can sense and respond to changes in environmental parameters including atmospheric CO2 and temperatures. High temperatures beyond the physiological threshold can significantly affect plant growth and development and thus attenuate crop productivity. However, elevated atmospheric CO2 can mitigate the deleterious effects of heat stress on plants. Despite a large body of literature supporting the positive impact of elevated CO2 on thermotolerance, the underlying biological mechanisms and precise molecular pathways that lead to enhanced tolerance to heat stress remain largely unclear. Under heat stress, elevated CO2-induced expression of respiratory burst oxidase homologs (RBOHs) and reactive oxygen species (ROS) signaling play a critical role in stomatal movement, which optimizes gas exchange to enhance photosynthesis and water use efficiency. Notably, elevated CO2 also fortifies antioxidant defense and redox homeostasis to alleviate heat-induced oxidative damage. Both hormone-dependent and independent pathways have been shown to mediate high CO2-induced thermotolerance. The activation of heat-shock factors and subsequent expression of heat-shock proteins are thought to be the essential mechanism downstream of hormone and ROS signaling. Here we review the role of phytohormones in plant response to high atmospheric CO2 and temperatures. We also discuss the potential mechanisms of elevated CO2-induced thermotolerance by focusing on several key phytohormones such as ethylene. Finally, we address some limitations of our current understanding and the need for further research to unveil the yet-unknown crosstalk between plant hormones in mediating high CO2-induced thermotolerance in plants.
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Affiliation(s)
- Golam Jalal Ahammed
- College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yelan Guang
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits and Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Youxin Yang
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits and Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China.
| | - Jinyin Chen
- Jiangxi Key Laboratory for Postharvest Technology and Nondestructive Testing of Fruits and Vegetables, Collaborative Innovation Center of Post-Harvest Key Technology and Quality Safety of Fruits and Vegetables, College of Agronomy, Jiangxi Agricultural University, Nanchang, 330045, China.
- Pingxiang University, Pingxiang, Jiangxi, China.
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12
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Živanović B, Milić Komić S, Nikolić N, Mutavdžić D, Srećković T, Veljović Jovanović S, Prokić L. Differential Response of Two Tomato Genotypes, Wild Type cv. Ailsa Craig and Its ABA-Deficient Mutant flacca to Short-Termed Drought Cycles. PLANTS 2021; 10:plants10112308. [PMID: 34834671 PMCID: PMC8617711 DOI: 10.3390/plants10112308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/20/2021] [Accepted: 10/20/2021] [Indexed: 01/14/2023]
Abstract
Two tomato genotypes with constitutively different ABA level, flacca mutant and wild type of Ailsa Craig cv. (WT), were subjected to three repeated drought cycles, with the aim to reveal the role of the abscisic acid (ABA) threshold in developing drought tolerance. Differential responses to drought of two genotypes were obtained: more pronounced stomatal closure, ABA biosynthesis and proline accumulation in WT compared to the mutant were compensated by dry weight accumulation accompanied by transient redox disbalance in flacca. Fourier-transform infrared (FTIR) spectra analysis of isolated cell wall material and morphological parameter measurements on tomato leaves indicated changes in dry weight accumulation and carbon re-allocation to cell wall constituents in flacca, but not in WT. A higher proportion of cellulose, pectin and lignin in isolated cell walls from flacca leaves further increased with repeated drought cycles. Different ABA-dependent stomatal closure between drought cycles implies that acquisition of stomatal sensitivity may be a part of stress memory mechanism developed under given conditions. The regulatory role of ABA in the cell wall restructuring and growth regulation under low leaf potential was discussed with emphasis on the beneficial effects of drought priming in developing differential defense strategies against drought.
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Affiliation(s)
- Bojana Živanović
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
| | - Sonja Milić Komić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
| | - Nenad Nikolić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
| | - Dragosav Mutavdžić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
- Center for Green Technologies, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Tatjana Srećković
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
- Center for Green Technologies, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
| | - Sonja Veljović Jovanović
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia; (B.Ž.); (S.M.K.); (N.N.); (D.M.); (T.S.)
- Center for Green Technologies, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
- Correspondence: (S.V.J.); (L.P.)
| | - Ljiljana Prokić
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, 11080 Belgrade, Serbia
- Correspondence: (S.V.J.); (L.P.)
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Jahan MS, Guo S, Sun J, Shu S, Wang Y, El-Yazied AA, Alabdallah NM, Hikal M, Mohamed MHM, Ibrahim MFM, Hasan MM. Melatonin-mediated photosynthetic performance of tomato seedlings under high-temperature stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 167:309-320. [PMID: 34392044 DOI: 10.1016/j.plaphy.2021.08.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/31/2021] [Accepted: 08/03/2021] [Indexed: 05/21/2023]
Abstract
Photosynthesis is a fundamental biosynthetic process in plants that can enhance carbon absorption and increase crop productivity. Heat stress severely inhibits photosynthetic efficiency. Melatonin is a bio-stimulator capable of regulating diverse abiotic stress tolerances. However, the underlying mechanisms of melatonin-mediated photosynthesis in plants exposed to heat stress largely remain elucidated. Our results revealed that melatonin treatment (100 μM) in tomato seedlings increased the endogenous melatonin levels and photosynthetic pigment content along with upregulated of their biosynthesis gene expression under high-temperature stress (42 °C for 24 h), whereas heat stress significantly decreased the values of gas exchange parameters. Under heat stress, melatonin boosted CO2 assimilation, i.e., Vc,max (maximum rate of ribulose-1,5-bisphosphate carboxylase, Rubisco), and Jmax (electron transport of Rubisco generation) and also enhanced the Rubisco and FBPase activities, which resulted in upregulated photosynthetic related gene expression. In addition, heat stress greatly reduced the photochemical chemistry of photosystem II (PSII) and photosystem I (PSI), particularly the maximum quantum efficiency of PSII (Fv/Fm) and PSI (Pm). Conversely, melatonin supplementation increased the chlorophyll a fluorescence parameters led to amplifying the electron transport efficiency. Moreover, heat stress decreased the actual PSII efficiency (ΦPSII), electron transport rate (ETR) and photochemical quenching coefficient (qP), while increasing nonphotochemical quenching (NPQ); however, melatonin reversed these values, which helps to fostering the dissipation of excess excitation energy. Taken together, our results provide a concrete insight into the efficacy of melatonin-mediated photosynthesis performance in a high-temperature regime.
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Affiliation(s)
- Mohammad Shah Jahan
- Key Laboratory of Southern Vegetable Crop Genetic Improvement in Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, People's Republic of China; Department of Horticulture, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Shirong Guo
- Key Laboratory of Southern Vegetable Crop Genetic Improvement in Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
| | - Jin Sun
- Key Laboratory of Southern Vegetable Crop Genetic Improvement in Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Sheng Shu
- Key Laboratory of Southern Vegetable Crop Genetic Improvement in Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Yu Wang
- Key Laboratory of Southern Vegetable Crop Genetic Improvement in Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Ahmed Abou El-Yazied
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, 11566, Egypt
| | - Nadiyah M Alabdallah
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 383, Dammam, Saudi Arabia
| | - Mohamed Hikal
- Department of Biochemistry, Faculty of Agriculture, Ain Shams University, Cairo, 11566, Egypt
| | - Mostafa H M Mohamed
- Department of Horticulture, Faculty of Agriculture, Benha University, Benha, 13736, Egypt
| | - Mohamed F M Ibrahim
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, 11566, Egypt
| | - Md Mahadi Hasan
- State Key Laboratory of Grassland Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu Province, China
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Role of Reactive Oxygen Species and Hormones in Plant Responses to Temperature Changes. Int J Mol Sci 2021; 22:ijms22168843. [PMID: 34445546 PMCID: PMC8396215 DOI: 10.3390/ijms22168843] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/04/2021] [Accepted: 08/11/2021] [Indexed: 12/22/2022] Open
Abstract
Temperature stress is one of the major abiotic stresses that adversely affect agricultural productivity worldwide. Temperatures beyond a plant's physiological optimum can trigger significant physiological and biochemical perturbations, reducing plant growth and tolerance to stress. Improving a plant's tolerance to these temperature fluctuations requires a deep understanding of its responses to environmental change. To adapt to temperature fluctuations, plants tailor their acclimatory signal transduction events, and specifically, cellular redox state, that are governed by plant hormones, reactive oxygen species (ROS) regulatory systems, and other molecular components. The role of ROS in plants as important signaling molecules during stress acclimation has recently been established. Here, hormone-triggered ROS produced by NADPH oxidases, feedback regulation, and integrated signaling events during temperature stress activate stress-response pathways and induce acclimation or defense mechanisms. At the other extreme, excess ROS accumulation, following temperature-induced oxidative stress, can have negative consequences on plant growth and stress acclimation. The excessive ROS is regulated by the ROS scavenging system, which subsequently promotes plant tolerance. All these signaling events, including crosstalk between hormones and ROS, modify the plant's transcriptomic, metabolomic, and biochemical states and promote plant acclimation, tolerance, and survival. Here, we provide a comprehensive review of the ROS, hormones, and their joint role in shaping a plant's responses to high and low temperatures, and we conclude by outlining hormone/ROS-regulated plant responsive strategies for developing stress-tolerant crops to combat temperature changes.
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15
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Genome-Wide Identification and Characterization of Cysteine-Rich Receptor-Like Protein Kinase Genes in Tomato and Their Expression Profile in Response to Heat Stress. DIVERSITY 2021. [DOI: 10.3390/d13060258] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
During plant growth, development and stress adaption, receptor-like protein kinases (RLKs) are essential components in perceiving and integrating extracellular stimuli and transmitting the signals to activate the downstream signaling pathways. Cysteine-rich receptor-like protein kinases (CRKs) are a large subfamily of RLKs and their roles in modulating plant disease resistance are well elucidated. However, the roles of CRKs in plant abiotic stress responses, especially heat stress, are largely unknown. In this study, 35 SlCRK genes were identified in tomato (Solanum lycopersicum) based on the multiple sequence alignment and phylogenetic relationships. SlCRK genes are tandemly distributed on seven chromosomes and have similar exon–intron organization and common conserved motifs. Various phytohormone responsive, stress responsive cis-regulatory elements and heat shock elements are predicted in the promoter regions of SlCRK genes. Transcriptome analysis of tomato fruits under heat stress revealed that most SlCRK genes were downregulated upon heat treatment. GO enrichment analyses of genes that were co-expressed with SlCRK members have identified various stress responses related and proteasomal protein catabolic process related genes, which may be involved in heat stress signaling. Overall, our results provide valuable information for further research on the roles of SlCRKs in response to abiotic stress, especially heat stress.
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Rao SQ, Chen XQ, Wang KH, Zhu ZJ, Yang J, Zhu B. Effect of short-term high temperature on the accumulation of glucosinolates in Brassica rapa. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 161:222-233. [PMID: 33639590 DOI: 10.1016/j.plaphy.2021.02.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/11/2021] [Indexed: 05/24/2023]
Abstract
Glucosinolates, an important class of secondary metabolites in cruciferous vegetables, play a crucial role in protecting plants from stress-related damage. The mechanism of glucosinolate synthesis under short-term high temperature stress has not been sufficiently studied. In this work, we investigated the changes in transcription factors, synthetic genes, and related metabolites involved in glucosinolate synthesis by pakchoi seedlings under short-term high temperature stress (40 °C for 8 h). Short-term high temperature stress inhibited the primary sulfur assimilation and the contents of methionine, cysteine and glutathione. The contents of aliphatic and indolic glucosinolates were increased by short-term high temperature stress, whereas the content of 4-methoxy-glucobrassicin increased significantly. During the stress period, the transcript level of glucosinolate related MYB transcription factors had been basically significantly up-regulated, whereas the transcript level of aliphatic and indolic glucosinolate synthetic genes were predominantly up-regulated and down-regulated respectively. In the early recovery period, primary sulfur assimilation up-regulated rapidly, and decreased during the late recovery process. The glucosinolate content and synthesis gene expression act similar to the primary sulfur assimilation, a short up-regulated in early recovery, then all go down at 40 and 48 h after short-term high temperature treatment.
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Affiliation(s)
- Shuai-Qi Rao
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China
| | - Xiao-Qi Chen
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China
| | - Kuan-Hong Wang
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China
| | - Zhu-Jun Zhu
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China
| | - Jing Yang
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China.
| | - Biao Zhu
- Zhejiang Agricultural and Forestry University, School of Agriculture and Food Science, Hangzhou, Zhejiang, 311300, China.
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Exploring Morpho-Physiological Variation for Heat Stress Tolerance in Tomato. PLANTS 2021; 10:plants10020347. [PMID: 33673031 PMCID: PMC7918821 DOI: 10.3390/plants10020347] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 11/17/2022]
Abstract
Texas tomato production is vulnerable to extreme heat in the spring-summer cropping period, which is exacerbated by the lack of superior genetic materials that can perform well in such environments. There is a dire need for selecting superior varieties that can adapt to warm environments and exhibit high yield stability under heat stress conditions. This research aimed at identifying heat-tolerant varieties under heat-stress conditions in controlled and open-field environments and was carried out in three stages. For the first experiment, 43 varieties were screened based on yield responses in natural open-field environment. From those, 18 varieties were chosen and exposed to control (greenhouse: 26/20 °C) and constant heat-stress (growth-chamber: 34/24 °C) conditions for three months. Measurements were done for chlorophyll fluorescence, chlorophyll content (SPAD), plant height, stem diameter and heat injury index (HII). The last experiment was conducted in an open field with a pool of varieties selected from the first and second experiments. Leaf gas exchange, leaf temperature, chlorophyll fluorescence, SPAD value, electrolyte leakage, heat injury index and yield were assessed. From the combined studies, we concluded that heat-tolerant genotypes selected by using chlorophyll fluorescence and HII in controlled heat-stress conditions also exhibited heat-tolerance in open-field environments. Electrolyte leakage and HII best distinguished tomato varieties in open-field environments as plants with low electrolyte leakage and HII had higher total yield. 'Heat Master,' 'New Girl,' 'HM-1823,' 'Rally,' 'Valley Girl,' 'Celebrity,' and 'Tribeca' were identified as high heat-tolerant varieties. Through trait correlation analysis we provide a better understanding of which traits could be useful for screening and breeding other heat-tolerant tomato varieties.
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Malhi GS, Kaur M, Kaushik P, Alyemeni MN, Alsahli AA, Ahmad P. Arbuscular mycorrhiza in combating abiotic stresses in vegetables: An eco-friendly approach. Saudi J Biol Sci 2020; 28:1465-1476. [PMID: 33613074 PMCID: PMC7878692 DOI: 10.1016/j.sjbs.2020.12.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/01/2020] [Accepted: 12/01/2020] [Indexed: 12/17/2022] Open
Abstract
Vegetable production is hampered by several abiotic stresses which are very common in this era of climate change. There is a huge pressure on the plants to survive and yield better results even in the prevalence of various environmental stresses such as cold stress, drought, heat stress, salinity etc. This necessitates the need of robust plant growth which is possible with mycorrhizal association. Mycorrhiza improves plants tolerance to several abiotic stresses by various physiological, functional and biochemical changes in plants. The application of arbuscular mycorrhiza (AM) as vegetable biofertilizers doesn’t only influence the plant health, but moreover discursively it lowers the demand for harmful chemical fertilizers. Overall, it may be concluded that inoculation of vegetables with arbuscular mycorrhizal fungi can be used, as it easily guards plants against undesirable abiotic stresses. In this work, information is provided based on several examples from the literature based on the application of AM to combat harmful abiotic stresses in vegetable crops. This paper reviews the impacts of AM fungi on the plant parameters, its functional activities and molecular mechanisms which makes it more adaptable and underline the future prospects of using AM fungi as a biofertilizer in the stress condition.
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Affiliation(s)
| | | | - Prashant Kaushik
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Mohammed Nasser Alyemeni
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulaziz Abdullah Alsahli
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Parvaiz Ahmad
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.,Department of Botany, S.P. College, Srinagar, Jammu and Kashmir, 190001, India
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Khan A, Khan AL, Imran M, Asaf S, Kim YH, Bilal S, Numan M, Al-Harrasi A, Al-Rawahi A, Lee IJ. Silicon-induced thermotolerance in Solanum lycopersicum L. via activation of antioxidant system, heat shock proteins, and endogenous phytohormones. BMC PLANT BIOLOGY 2020; 20:248. [PMID: 32493420 PMCID: PMC7268409 DOI: 10.1186/s12870-020-02456-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 05/21/2020] [Indexed: 05/08/2023]
Abstract
BACKGROUND Abiotic stresses (e.g., heat or limited water and nutrient availability) limit crop production worldwide. With the progression of climate change, the severity and variation of these stresses are expected to increase. Exogenous silicon (Si) has shown beneficial effects on plant growth; however, its role in combating the negative effects of heat stress and their underlying molecular dynamics are not fully understood. RESULTS Exogenous Si significantly mitigated the adverse impact of heat stress by improving tomato plant biomass, photosynthetic pigments, and relative water content. Si induced stress tolerance by decreasing the concentrations of superoxide anions and malondialdehyde, as well as mitigating oxidative stress by increasing the gene expression for antioxidant enzymes (peroxidases, catalases, ascorbate peroxidases, superoxide dismutases, and glutathione reductases) under stress conditions. This was attributed to increased Si uptake in the shoots via the upregulation of low silicon (SlLsi1 and SlLsi2) gene expression under heat stress. Interestingly, Si stimulated the expression and transcript accumulation of heat shock proteins by upregulating heat transcription factors (Hsfs) such as SlHsfA1a-b, SlHsfA2-A3, and SlHsfA7 in tomato plants under heat stress. On the other hand, defense and stress signaling-related endogenous phytohormones (salicylic acid [SA]/abscisic acid [ABA]) exhibited a decrease in their concentration and biosynthesis following Si application. Additionally, the mRNA and gene expression levels for SA (SlR1b1, SlPR-P2, SlICS, and SlPAL) and ABA (SlNCEDI) were downregulated after exposure to stress conditions. CONCLUSION Si treatment resulted in greater tolerance to abiotic stress conditions, exhibiting higher plant growth dynamics and molecular physiology by regulating the antioxidant defense system, SA/ABA signaling, and Hsfs during heat stress.
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Affiliation(s)
- Adil Khan
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - Abdul Latif Khan
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman.
| | - Muhammad Imran
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, South Korea
| | - Sajjad Asaf
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - Yoon-Ha Kim
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, South Korea
| | - Saqib Bilal
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - Muhammad Numan
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman.
| | - Ahmed Al-Rawahi
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, 616, Oman
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, South Korea
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Zhao M, Zhang N, Gao T, Jin J, Jing T, Wang J, Wu Y, Wan X, Schwab W, Song C. Sesquiterpene glucosylation mediated by glucosyltransferase UGT91Q2 is involved in the modulation of cold stress tolerance in tea plants. THE NEW PHYTOLOGIST 2020; 226:362-372. [PMID: 31828806 DOI: 10.1111/nph.16364] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/06/2019] [Indexed: 05/18/2023]
Abstract
Plants produce and emit terpenes, including sesquiterpenes, during growth and development, which serve different functions in plants. The sesquiterpene nerolidol has health-promoting properties and adds a floral scent to plants. However, the glycosylation mechanism of nerolidol and its biological roles in plants remained unknown. Sesquiterpene UDP-glucosyltransferases were selected by using metabolites-genes correlation analysis, and its roles in response to cold stress were studied. We discovered the first plant UGT (UGT91Q2) in tea plant, whose expression is strongly induced by cold stress and which specifically catalyzes the glucosylation of nerolidol. The accumulation of nerolidol glucoside was consistent with the expression level of UGT91Q2 in response to cold stress, as well as in different tea cultivars. The reactive oxygen species (ROS) scavenging capacity of nerolidol glucoside was significantly higher than that of free nerolidol. Down-regulation of UGT91Q2 resulted in reduced accumulation of nerolidol glucoside, ROS scavenging capacity and tea plant cold tolerance. Tea plants absorbed airborne nerolidol and converted it to its glucoside, subsequently enhancing tea plant cold stress tolerance. Nerolidol plays a role in response to cold stress as well as in triggering plant-plant communication in response to cold stress. Our findings reveal previously unidentified roles of volatiles in response to abiotic stress in plants.
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Affiliation(s)
- Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Na Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jingming Wang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yi Wu
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
- Biotechnology of Natural Products, Technische Universität München, Liesel-Beckmann-Str. 1, Freising, 85354, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
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21
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Zheng S, Chen Z, Nie H, Sun S, Zhou D, Wang T, Zhai X, Liu T, Xing G, Li M. Identification of differentially expressed photosynthesis- and sugar synthesis-related genes in tomato ( Solanum lycopersicum) plants grown under different CO 2 concentrations. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1715833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Shaowen Zheng
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Zhifeng Chen
- College of Biological and Agricultural Technology, Zunyi Normal University, Zunyi, Guizhou, China
| | - Hongmei Nie
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Sheng Sun
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Dan Zhou
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Tianhong Wang
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Xijiao Zhai
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Tingting Liu
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Guoming Xing
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Meilan Li
- Department of Horticultural, Shanxi Agricultural University, Taigu, Shanxi, China
- Collaborative Innovation Center for Improving the Quality and Efficiency of Greenhouse Vegetable in Shanxi Province, College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi, China
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22
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Zhao M, Jin J, Gao T, Zhang N, Jing T, Wang J, Ban Q, Schwab W, Song C. Glucosyltransferase CsUGT78A14 Regulates Flavonols Accumulation and Reactive Oxygen Species Scavenging in Response to Cold Stress in Camellia sinensis. FRONTIERS IN PLANT SCIENCE 2019; 10:1675. [PMID: 31929783 PMCID: PMC6941654 DOI: 10.3389/fpls.2019.01675] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 11/28/2019] [Indexed: 05/02/2023]
Abstract
Glycosyltransferases (UGTs) play diverse roles in cellular metabolism by altering regulatory metabolites activities. However, the physiological roles of most members of UGTs in crops in response to abiotic stresses are unknown. We have identified a novel glycosyltransferase CsUGT78A14 in tea crops, an important economic crops, whose expression is strongly induced by cold stress. Biochemical analyses confirmed that CsUGT78A14-1 showed the highest activity toward kaempferol and is involved in the biosynthesis of kaempferol-diglucoside, whereas the product of CsUGT78A14-2, which differs from CsUGT78A14-1 by a single amino acid, was identified as 3-O-glucoside. The accumulation of kaempferol monoglucosides and diglucosides was consistent with the expression levels of CsUGT78A14 in response to cold stress, as well as in different tissues and genotypes of tea plants. Down-regulation of CsUGT78A14 resulted in reduced accumulation of flavonols, reactive oxygen species (ROS) scavenging capacity and finally reduced tea plant stress tolerance under cold stress. The antioxidant capacity of flavonols aglycon was enhanced by glucosylation catalyzed by CsUGT78A14. The results demonstrate that CsUGT78A14 plays a critical role in cold stress by increasing flavonols accumulation and ROS scavenging capacity, providing novel insights into the biological role of UGTs and flavonoids in plants.
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Affiliation(s)
- Mingyue Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Jieyang Jin
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Ting Gao
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Na Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Tingting Jing
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Jingming Wang
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Qiuyan Ban
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
| | - Wilfried Schwab
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
- Biotechnology of Natural Products, Technische Universität München, Freising, Germany
| | - Chuankui Song
- State Key Laboratory of Tea Plant Biology and Utilization, International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, China
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Li L, Wang M, Pokharel SS, Li C, Parajulee MN, Chen F, Fang W. Effects of elevated CO 2 on foliar soluble nutrients and functional components of tea, and population dynamics of tea aphid, Toxoptera aurantii. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 145:84-94. [PMID: 31675526 DOI: 10.1016/j.plaphy.2019.10.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/13/2019] [Accepted: 10/17/2019] [Indexed: 05/21/2023]
Abstract
The rising atmospheric CO2 concentration has shown to affect plant physiology and chemistry by altering plant primary and secondary metabolisms. Nevertheless, the impacts of elevated CO2 on plant nutrients and functional components of tea remain largely unknown, which will likely affect tea quality and taste under climate change scenario. Being sources of nutrients and secondary chemicals/metabolites for herbivorous insects, the variation in foliar soluble nutrients and functional components of tea plants resulting from CO2 enrichment will further affect the herbivorous insects' occurrence and feeding ecology. In this study, the tea aphid, Toxoptera aurantii was selected as the phloem-feeding herbivore to study the effects of elevated CO2 on foliar soluble nutrients and functional components of tea seedlings, and the population dynamics of T. aurantii. The results indicated that elevated CO2 enhanced the photosynthetic ability and improved the plant growth of tea seedlings compared with ambient CO2, with significant increases in net photosynthetic rate (+20%), intercellular CO2 concentration (+15.74%), leaf biomass (+15.04%) and root-to-shoot ratio (+8.08%), and significant decreases in stomatal conductance (-5.52%) and transpiration rate (-9.40%) of tea seedlings. Moreover, elevated CO2 significantly increased the foliar content of soluble sugars (+4.74%), theanine (+3.66%) and polyphenols (+12.01%) and reduced the foliar content of free amino acids (-9.09%) and caffeine (-3.38%) of tea seedlings compared with ambient CO2. Furthermore, the relative transcript levels of the genes of theanine synthetase (+18.64%), phenylalanine ammonia lyase (+49.50%), s'-adenosine methionine synthetase (+143.03%) and chalcone synthase (+61.86%) were up-regulated, and that of caffeine synthase (-56.91%) was down-regulated for the tea seedlings grown under elevated CO2 relative to ambient CO2. In addition, the foliar contents of jasmonic acid (+98.6%) and salicylic acid (+155.6%) also increased for the tea seedlings grown under elevated CO2 in contrast to ambient CO2. Also, significant increases in the population abundance of T. aurantii (+4.24%-41.17%) were observed when they fed on tea seedlings grown under elevated CO2 compared to ambient CO2. It is presumed that the tea quality and taste will be improved owing to the enhanced foliar soluble nutrients and functional components of tea seedlings under the climate change scenario, especially on account of the rising atmospheric CO2 concentration, while the climate change may exacerbate the occurrence of tea aphid, T. aurantii, despite the enhanced secondary defensive chemicals manifested by the CO2 enrichment.
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Affiliation(s)
- Likun Li
- Department of Entomology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Mengfei Wang
- Department of Entomology, Nanjing Agricultural University, Nanjing, 210095, China
| | | | - Chunxu Li
- Department of Entomology, Nanjing Agricultural University, Nanjing, 210095, China
| | - Megha N Parajulee
- Texas A&M AgriLife Research and ExtensionCenter, Lubbock, TX79403, USA
| | - Fajun Chen
- Department of Entomology, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Wanping Fang
- Department of Tea Science, College of Horticulture, Nanjing Agricultural University, China.
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24
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Fang L, Abdelhakim LOA, Hegelund JN, Li S, Liu J, Peng X, Li X, Wei Z, Liu F. ABA-mediated regulation of leaf and root hydraulic conductance in tomato grown at elevated CO 2 is associated with altered gene expression of aquaporins. HORTICULTURE RESEARCH 2019; 6:104. [PMID: 31645959 PMCID: PMC6804533 DOI: 10.1038/s41438-019-0187-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 07/16/2019] [Accepted: 08/03/2019] [Indexed: 05/07/2023]
Abstract
Elevated CO2 concentration in the air (e[CO2]) decreases stomatal density (SD) and stomatal conductance (g s) where abscisic acid (ABA) may play a role, yet the underlying mechanism remains largely elusive. We investigated the effects of e[CO2] (800 ppm) on leaf gas exchange and water relations of two tomato (Solanum lycopersicum) genotypes, Ailsa Craig (WT) and its ABA-deficient mutant (flacca). Compared to plants grown at ambient CO2 (400 ppm), e[CO2] stimulated photosynthetic rate in both genotypes, while depressed the g s only in WT. SD showed a similar response to e[CO2] as g s, although the change was not significant. e[CO2] increased leaf and xylem ABA concentrations and xylem sap pH, where the increases were larger in WT than in flacca. Although leaf water potential was unaffected by CO2 growth environment, e[CO2] lowered osmotic potential, hence tended to increase turgor pressure particularly for WT. e[CO2] reduced hydraulic conductance of leaf and root in WT but not in flacca, which was associated with downregulation of gene expression of aquaporins. It is concluded that ABA-mediated regulation of g s, SD, and gene expression of aquaporins coordinates the whole-plant hydraulics of tomato grown at different CO2 environments.
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Affiliation(s)
- Liang Fang
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
- Present Address: Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, PO Box 430, 6700 AK Wageningen, The Netherlands
| | - Lamis Osama Anwar Abdelhakim
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
| | - Josefine Nymark Hegelund
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
| | - Shenglan Li
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
| | - Jie Liu
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Xiaoying Peng
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410128 Changsha, Hunan China
| | - Xiangnan Li
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 130102 Changchun, China
| | - Zhenhua Wei
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Fulai Liu
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Taastrup, Denmark
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, 712100 Yangling, Shaanxi China
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25
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Pan C, Zhang H, Ma Q, Fan F, Fu R, Ahammed GJ, Yu J, Shi K. Role of ethylene biosynthesis and signaling in elevated CO 2-induced heat stress response in tomato. PLANTA 2019; 250:563-572. [PMID: 31123806 DOI: 10.1007/s00425-019-03192-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/16/2019] [Indexed: 05/07/2023]
Abstract
This article unveiled that ethylene biosynthesis and signaling play a critical role in heat stress response of tomato plants under elevated CO2. Plant responses to elevated CO2 and heat stress are tightly regulated by an intricate network of phytohormones. Plants accumulate ethylene (ET), the smallest hormone, in response to heat stress; however, the role of ET and its signaling in elevated CO2-induced heat stress response remains largely unknown. In this study, we found that transcript levels of multiple genes relating to ET synthesis, signaling, and heat shock proteins (HSPs) were induced by elevated CO2 (800 μmol mol-1) compared to ambient CO2 (400 μmol mol-1) in tomato leaves under controlled temperature conditions (25 °C). Elevated CO2-induced responses to heat stress (42 °C) were closely associated with increased ET production and HSP70 expression at both transcript and protein levels. Pretreatment with an antagonist of ET, 1-methylcyclopropene that inhibits ET-dependent responses, abolished elevated CO2-induced stress response without affecting the ET production rate. In addition, silencing of ethylene response factor 1 (ERF1) compromised elevated CO2-induced responses to heat stress, which was associated with the concomitant reduction in the transcript of heat shock factor A2, HSP70 and HSP90, indicating that ERF1 is required for elevated CO2-induced responses to heat. All these results provide convincing evidence on the importance of ET biosynthesis and signaling in elevated CO2-induced heat stress response in tomato plants. Thus, the study advances our understanding of the mechanisms of elevated CO2-induced stress response and may potentially be useful for breeding heat-tolerant tomatoes in the era of climate change.
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Affiliation(s)
- Caizhe Pan
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
| | - Huan Zhang
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
| | - Qiaomei Ma
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
| | - Feijun Fan
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
- Lishui Crop Research Station, 827 Liyang Street, Lishui, 323000, People's Republic of China
| | - Ruishuang Fu
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, People's Republic of China
| | - Jingquan Yu
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China
| | - Kai Shi
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China.
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Exogenous Melatonin Enhances Cold, Salt and Drought Stress Tolerance by Improving Antioxidant Defense in Tea Plant ( Camellia sinensis (L.) O. Kuntze). Molecules 2019; 24:molecules24091826. [PMID: 31083611 PMCID: PMC6539935 DOI: 10.3390/molecules24091826] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 12/16/2022] Open
Abstract
Melatonin is a biological hormone that plays crucial roles in stress tolerance. In this study, we investigated the effect of exogenous melatonin on abiotic stress in the tea plant. Under cold, salt and drought stress, increasing malondialdehyde levels and decreasing maximum photochemical efficiency of PSII were observed in tea leaves. Meanwhile, the levels of reactive oxygen species (ROS) increased significantly under abiotic stress. Interestingly, pretreatment with melatonin on leaves alleviated ROS burst, decreased malondialdehyde levels and maintain high photosynthetic efficiency. Moreover, 100 μM melatonin-pretreated tea plants showed high levels of glutathione and ascorbic acid and increased the activities of superoxide dismutase, peroxidase, catalase and ascorbate peroxidase under abiotic stress. Notably, melatonin treatments can positively up-regulate the genes (CsSOD, CsPOD, CsCAT and CsAPX) expression of antioxidant enzyme biosynthesis. Taken together, our results confirmed that melatonin protects tea plants against abiotic stress-induced damages through detoxifying ROS and regulating antioxidant systems.
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27
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Zhang H, Pan C, Gu S, Ma Q, Zhang Y, Li X, Shi K. Stomatal movements are involved in elevated CO 2 -mitigated high temperature stress in tomato. PHYSIOLOGIA PLANTARUM 2019; 165:569-583. [PMID: 29732568 DOI: 10.1111/ppl.12752] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/23/2018] [Accepted: 04/27/2018] [Indexed: 05/14/2023]
Abstract
Climate changes such as heat waves often affect plant growth and pose a growing threat to natural and agricultural ecosystems. Elevated atmospheric CO2 can mitigate the negative effects of heat stress, but the underlying mechanisms remain largely unclear. We examined the interactive effects of elevated CO2 (eCO2 ) and temperature on the generation of the hydrogen peroxide (H2 O2 ) and stomatal movement characteristics associated with heat tolerance in tomato seedlings grown under two CO2 concentrations (400 and 800 µmol mol-1 ) and two temperatures (25 and 42°C). eCO2 ameliorated the negative effects of heat stress, which was accompanied by greater amounts of RESPIRATORY BURST OXIDASE 1 (RBOH1) transcripts, apoplastic H2 O2 accumulation and decreased stomatal aperture. Silencing RBOH1 and SLOW-TYPE ANION CHANNEL, impeded eCO2 -induced stomatal closure and compromised the eCO2 -enhanced water use efficiency as well as the heat tolerance. Our findings suggest that RBOH1-dependent H2 O2 accumulation was involved in the eCO2 -induced stomatal closure, which participate in maintaining balance between water retention and heat loss under eCO2 concentrations. This phenomenon may be a contributor to eCO2 -induced heat tolerance in tomato, which will be critical for understanding how plants respond to both future climate extremes and changes in CO2 .
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Affiliation(s)
- Huan Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Caizhe Pan
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Shaohan Gu
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Qiaomei Ma
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Yiqing Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
| | - Xin Li
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
| | - Kai Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, Hangzhou, 310058, China
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Bigot S, Buges J, Gilly L, Jacques C, Le Boulch P, Berger M, Delcros P, Domergue JB, Koehl A, Ley-Ngardigal B, Tran Van Canh L, Couée I. Pivotal roles of environmental sensing and signaling mechanisms in plant responses to climate change. GLOBAL CHANGE BIOLOGY 2018; 24:5573-5589. [PMID: 30155993 DOI: 10.1111/gcb.14433] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/08/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Climate change reshapes the physiology and development of organisms through phenotypic plasticity, epigenetic modifications, and genetic adaptation. Under evolutionary pressures of the sessile lifestyle, plants possess efficient systems of phenotypic plasticity and acclimation to environmental conditions. Molecular analysis, especially through omics approaches, of these primary lines of environmental adjustment in the context of climate change has revealed the underlying biochemical and physiological mechanisms, thus characterizing the links between phenotypic plasticity and climate change responses. The efficiency of adaptive plasticity under climate change indeed depends on the realization of such biochemical and physiological mechanisms, but the importance of sensing and signaling mechanisms that can integrate perception of environmental cues and transduction into physiological responses is often overlooked. Recent progress opens the possibility of considering plant phenotypic plasticity and responses to climate change through the perspective of environmental sensing and signaling. This review aims to analyze present knowledge on plant sensing and signaling mechanisms and discuss how their structural and functional characteristics lead to resilience or hypersensitivity under conditions of climate change. Plant cells are endowed with arrays of environmental and stress sensors and with internal signals that act as molecular integrators of the multiple constraints of climate change, thus giving rise to potential mechanisms of climate change sensing. Moreover, mechanisms of stress-related information propagation lead to stress memory and acquired stress tolerance that could withstand different scenarios of modifications of stress frequency and intensity. However, optimal functioning of existing sensors, optimal integration of additive constraints and signals, or memory processes can be hampered by conflicting interferences between novel combinations and novel changes in intensity and duration of climate change-related factors. Analysis of these contrasted situations emphasizes the need for future research on the diversity and robustness of plant signaling mechanisms under climate change conditions.
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Affiliation(s)
- Servane Bigot
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Julie Buges
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
- ECOBIO (Ecosystems-Biodiversity-Evolution) - UMR 6553, Univ Rennes, CNRS, Université de Rennes 1, Rennes, France
| | - Lauriane Gilly
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Cécile Jacques
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Pauline Le Boulch
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Marie Berger
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Pauline Delcros
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Jean-Baptiste Domergue
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Astrid Koehl
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Béra Ley-Ngardigal
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
| | - Loup Tran Van Canh
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
- ECOBIO (Ecosystems-Biodiversity-Evolution) - UMR 6553, Univ Rennes, CNRS, Université de Rennes 1, Rennes, France
| | - Ivan Couée
- Department of Life Sciences and Environment, Univ Rennes, Université de Rennes 1, Rennes, France
- ECOBIO (Ecosystems-Biodiversity-Evolution) - UMR 6553, Univ Rennes, CNRS, Université de Rennes 1, Rennes, France
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Ahammed GJ, Li X, Zhang G, Zhang H, Shi J, Pan C, Yu J, Shi K. Tomato photorespiratory glycolate-oxidase-derived H 2 O 2 production contributes to basal defence against Pseudomonas syringae. PLANT, CELL & ENVIRONMENT 2018; 41:1126-1138. [PMID: 28164315 DOI: 10.1111/pce.12932] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 01/31/2017] [Indexed: 05/10/2023]
Abstract
Despite being essential for C3 plants, photorespiration is believed to cause a significant crop yield loss even under future climates. However, how photorespiration affects plant basal defence still remains largely unknown. Here, we studied the involvement of photorespiration in tomato-Pseudomonas syringae pv. tomato DC3000 interaction focusing on three photorespiratory genes. Inoculation with P. syringae increased photorespiration rate (Pr) and expression of glycolate oxidase (GOX2), serine glyoxylate aminotransferase (SGT) and serine hydroxyl methyltransferase (SHMT1); however, inhibition of photorespiration by isonicotinic acid hydrazide decreased tomato basal defence against P. syringae. Furthermore, silencing of GOX2, SGT or SHMT1 genes in tomato decreased Pr but increased susceptibility to P. syringae, whereas transient overexpression of GOX2, SGT or SHMT1 in tobacco increased basal defence. Further study revealed that salicylic acid (SA) signalling is involved in GOX2-mediated, SGT-mediated and SHMT1-mediated defence. Moreover, H2 O2 pretreatment remarkably alleviated the GOX2 silencing-induced depression in basal defence and SA signalling, whereas it had no effect on that of SGT-silenced and SHMT1-silenced plants. Taken together, these results suggest that H2 O2 is critical for GOX2-modulated but not SGT-modulated or SHMT1-modulated SA signalling and subsequent basal defence against P. syringae. This work deepens the understanding of photorespiration-involved defence responses to bacterial attack in plants.
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Affiliation(s)
- Golam Jalal Ahammed
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Xin Li
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
| | - Guanqun Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Huan Zhang
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Junying Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Caizhe Pan
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Jingquan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Kai Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou, 310058, China
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30
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Zinta G, AbdElgawad H, Peshev D, Weedon JT, Van den Ende W, Nijs I, Janssens IA, Beemster GTS, Asard H. Dynamics of metabolic responses to periods of combined heat and drought in Arabidopsis thaliana under ambient and elevated atmospheric CO2. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:2159-2170. [PMID: 29462345 PMCID: PMC6019062 DOI: 10.1093/jxb/ery055] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 02/06/2018] [Indexed: 05/24/2023]
Abstract
As a consequence of global change processes, plants will increasingly be challenged by extreme climatic events, against a background of elevated atmospheric CO2. We analysed responses of Arabidopsis thaliana to periods of a combination of elevated heat and water deficit at ambient and elevated CO2 in order to gain mechanistic insights regarding changes in primary metabolism. Metabolic changes induced by extremes of climate are dynamic and specific to different classes of molecules. Concentrations of soluble sugars and amino acids increased transiently after short (4-d) exposure to heat and drought, and readjusted to control levels under prolonged (8-d) stress. In contrast, fatty acids showed persistent changes during the stress period. Elevated CO2 reduced the impact of stress on sugar and amino acid metabolism, but not on fatty acids. Integrating metabolite data with transcriptome results revealed that some of the metabolic changes were regulated at the transcriptional level. Multivariate analyses grouped metabolites on the basis of stress exposure time, indicating specificity in metabolic responses to short and prolonged stress. Taken together, the results indicate that dynamic metabolic reprograming plays an important role in plant acclimation to climatic extremes. The extent of such metabolic adjustments is less under high CO2, further pointing towards the role of high CO2 in stress mitigation.
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Affiliation(s)
- Gaurav Zinta
- Centre of excellence PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein, Antwerp, Wilrijk, Belgium
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Groenenborgerlaan, Antwerp, Belgium
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Groenenborgerlaan, Antwerp, Belgium
- Department of Botany, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Darin Peshev
- Laboratory of Molecular Plant Biology, Institute of Botany and Microbiology, KU Leuven, Leuven-Heverlee, Belgium
| | - James T Weedon
- Centre of excellence PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein, Antwerp, Wilrijk, Belgium
| | - Wim Van den Ende
- Laboratory of Molecular Plant Biology, Institute of Botany and Microbiology, KU Leuven, Leuven-Heverlee, Belgium
| | - Ivan Nijs
- Centre of excellence PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein, Antwerp, Wilrijk, Belgium
| | - Ivan A Janssens
- Centre of excellence PLECO (Plants and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein, Antwerp, Wilrijk, Belgium
| | - Gerrit T S Beemster
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Groenenborgerlaan, Antwerp, Belgium
| | - Han Asard
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Groenenborgerlaan, Antwerp, Belgium
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Li X, Wei JP, Scott ER, Liu JW, Guo S, Li Y, Zhang L, Han WY. Exogenous Melatonin Alleviates Cold Stress by Promoting Antioxidant Defense and Redox Homeostasis in Camellia sinensis L. Molecules 2018; 23:molecules23010165. [PMID: 29342935 PMCID: PMC6017414 DOI: 10.3390/molecules23010165] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 11/16/2022] Open
Abstract
The unprecedented early spring frost that appears as a cold stress adversely affects growth and productivity in tea (Camellia sinensis L.); therefore, it is indispensable to develop approaches to improve the cold tolerance of tea. Here, we investigated the effect of pretreatment with exogenous melatonin on the net photosynthetic rate, the maximum photochemical efficiency of PSII, chlorophyll content, lipid peroxidation, reactive oxygen species (ROS) accumulation, antioxidant potential, and redox homeostasis in leaves of tea plants following cold stress. Our results revealed that cold treatment induced oxidative stress by increasing ROS accumulation, which in turn affected the photosynthetic process in tea leaves. However, treatment with melatonin mitigated cold-induced reductions in photosynthetic capacity by reducing oxidative stress through enhanced antioxidant potential and redox homeostasis. This study provides strong evidence that melatonin could alleviate cold-induced adverse effects in tea plants.
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Affiliation(s)
- Xin Li
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou 310008, China.
| | - Ji-Peng Wei
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou 310008, China.
| | - Eric R Scott
- Department of Biology, Tufts University, Medford, MA 02155, USA.
| | - Jian-Wei Liu
- Agricultural Technology Extension Center of Fuyang District, 118 Guihua West Road, Hangzhou 330183, China.
| | - Shuai Guo
- Hangzhou Botanical Garden, 1 Taoyuanling, Hangzhou 310013, China.
| | - Yang Li
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou 310008, China.
| | - Lan Zhang
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou 310008, China.
| | - Wen-Yan Han
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou 310008, China.
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Pan C, Ahammed GJ, Li X, Shi K. Elevated CO 2 Improves Photosynthesis Under High Temperature by Attenuating the Functional Limitations to Energy Fluxes, Electron Transport and Redox Homeostasis in Tomato Leaves. FRONTIERS IN PLANT SCIENCE 2018; 9:1739. [PMID: 30534134 PMCID: PMC6275242 DOI: 10.3389/fpls.2018.01739] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 11/08/2018] [Indexed: 05/18/2023]
Abstract
Elevated atmospheric CO2 improves leaf photosynthesis and plant tolerance to heat stress, however, the underlying mechanisms remain unclear. In this study, we exposed tomato plants to elevated CO2 (800 μmol mol-1) and/or high temperature (42°C for 24 h), and examined a range of photosynthetic and chlorophyll fluorescence parameters as well as cellular redox state to better understand the response of photosystem II (PSII) and PSI to elevated CO2 and heat stress. The results showed that, while the heat stress drastically decreased the net photosynthetic rate (Pn), maximum carboxylation rate (V cmax), maximum ribulose-1,5-bis-phosphate (RuBP) regeneration rate (J max) and maximal photochemical efficiency of PSII (Fv/Fm), the elevated CO2 improved those parameters under heat stress and at a 24 h recovery. Furthermore, the heat stress decreased the absorption flux, trapped energy flux, electron transport, energy dissipation per PSII cross section, while the elevated CO2 had the opposing effects that eventually decreased photoinhibition, damage to photosystems and reactive oxygen species accumulation. Similarly, the elevated CO2 helped the plants to maintain a reduced redox state as evidenced by the increased ratios of ASA:DHA and GSH:GSSG under heat stress and at recovery. Furthermore, the concentration of NADP+ and ratio of NADP+ to NADPH were induced by elevated CO2 at recovery. This study unraveled the crucial mechanisms of elevated CO2-mediated changes in energy fluxes, electron transport and redox homeostasis under heat stress, and shed new light on the responses of tomato plants to combined heat and elevated CO2.
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Affiliation(s)
- Caizhe Pan
- Department of Horticulture, Zhejiang University, Hangzhou, China
| | - Golam Jalal Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, China
- *Correspondence: Golam Jalal Ahammed,
| | - Xin Li
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Kai Shi
- Department of Horticulture, Zhejiang University, Hangzhou, China
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33
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Ahammed GJ, Xu W, Liu A, Chen S. COMT1 Silencing Aggravates Heat Stress-Induced Reduction in Photosynthesis by Decreasing Chlorophyll Content, Photosystem II Activity, and Electron Transport Efficiency in Tomato. FRONTIERS IN PLANT SCIENCE 2018; 9:998. [PMID: 30065736 PMCID: PMC6056654 DOI: 10.3389/fpls.2018.00998] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 06/19/2018] [Indexed: 05/19/2023]
Abstract
Despite a range of initiatives to reduce global carbon emission, the mean global temperature is increasing due to climate change. Since rising temperatures pose a serious threat of food insecurity, it is important to further explore important biological molecules that can confer thermotolerance to plants. Recently, melatonin has emerged as a universal abiotic stress regulator that can enhance plant tolerance to high temperature. Nonetheless, such regulatory roles of melatonin were unraveled mainly by assessing the effect of exogenous melatonin on plant tolerance to abiotic stress. Here, we generated melatonin deficient tomato plants by silencing of a melatonin biosynthetic gene, CAFFEIC ACID O-METHYLTRANSFERASE 1 (COMT1), to unveil the role of endogenous melatonin in photosynthesis under heat stress. We examined photosynthetic pigment content, leaf gas exchange, and a range of chlorophyll fluorescence parameters. The results showed that silencing of COMT1 aggravated heat stress by inhibiting both the light reactions and the carbon fixation reactions of photosynthesis. The photosynthetic pigment content, light absorption flux, trapped energy flux, energy dissipation, density of active reaction center per photosystem II (PSII) cross-section, the photosynthetic electron transport rate, the maximum photochemical efficiency of PSII photochemistry, and the rate of CO2 assimilation all decreased in COMT1-silenced plants compared with that of non-silenced plants particularly under heat stress. However, exogenous melatonin alleviated heat-induced photosynthetic inhibition in both genotypes, indicating that melatonin is essential for maintaining photosynthetic capacity under stressful conditions. These findings provide genetic evidence on the vital role of melatonin in photosynthesis and thus may have useful implication in horticultural crop management in the face of climate change.
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Affiliation(s)
- Golam J. Ahammed
- College of Forestry, Henan University of Science and Technology, Luoyang, China
- *Correspondence: Golam J. Ahammed,
| | - Wen Xu
- Department of Horticulture, Guizhou University, Guiyang, China
| | - Airong Liu
- College of Forestry, Henan University of Science and Technology, Luoyang, China
| | - Shuangchen Chen
- College of Forestry, Henan University of Science and Technology, Luoyang, China
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34
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Li X, Zhang L, Ahammed GJ, Li ZX, Wei JP, Shen C, Yan P, Zhang LP, Han WY. Stimulation in primary and secondary metabolism by elevated carbon dioxide alters green tea quality in Camellia sinensis L. Sci Rep 2017; 7:7937. [PMID: 28801632 PMCID: PMC5554289 DOI: 10.1038/s41598-017-08465-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 06/29/2017] [Indexed: 11/29/2022] Open
Abstract
Rising CO2 concentration, a driving force of climate change, is impacting global food security by affecting plant physiology. Nevertheless, the effects of elevated CO2 on primary and secondary metabolism in tea plants (Camellia sinensis L.) still remain largely unknown. Here we showed that exposure of tea plants to elevated CO2 (800 µmol mol−1 for 24 d) remarkably improved both photosynthesis and respiration in tea leaves. Furthermore, elevated CO2 increased the concentrations of soluble sugar, starch and total carbon, but decreased the total nitrogen concentration, resulting in an increased carbon to nitrogen ratio in tea leaves. Among the tea quality parameters, tea polyphenol, free amino acid and theanine concentrations increased, while the caffeine concentration decreased after CO2 enrichment. The concentrations of individual catechins were altered differentially resulting in an increased total catechins concentration under elevated CO2 condition. Real-time qPCR analysis revealed that the expression levels of catechins and theanine biosynthetic genes were up-regulated, while that of caffeine synthetic genes were down-regulated in tea leaves when grown under elevated CO2 condition. These results unveiled profound effects of CO2 enrichment on photosynthesis and respiration in tea plants, which eventually modulated the biosynthesis of key secondary metabolites towards production of a quality green tea.
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Affiliation(s)
- Xin Li
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China
| | - Lan Zhang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China
| | - Golam Jalal Ahammed
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China.,Department of Horticulture, Zijingang Campus, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P.R. China
| | - Zhi-Xin Li
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China.,Graduate School of Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Ji-Peng Wei
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China.,Graduate School of Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Chen Shen
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China.,Graduate School of Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Peng Yan
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China
| | - Li-Ping Zhang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China
| | - Wen-Yan Han
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling Road, Hangzhou, 310008, P.R. China.
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35
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Sekhar KM, Reddy KS, Reddy AR. Amelioration of drought-induced negative responses by elevated CO 2 in field grown short rotation coppice mulberry (Morus spp.), a potential bio-energy tree crop. PHOTOSYNTHESIS RESEARCH 2017; 132:151-164. [PMID: 28238122 DOI: 10.1007/s11120-017-0351-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 02/07/2017] [Indexed: 06/06/2023]
Abstract
Present study describes the responses of short rotation coppice (SRC) mulberry, a potential bio-energy tree, grown under interactive environment of elevated CO2 (E) and water stress (WS). Growth in E stimulated photosynthetic performance in well-watered (WW) as well as during WS with significant increases in light-saturated photosynthetic rates (A Sat), water use efficiency (WUEi), intercellular [CO2], and photosystem-II efficiency (F V/F M and ∆F/F M') with concomitant reduction in stomatal conductance (g s) and transpiration (E) compared to ambient CO2 (A) grown plants. Reduced levels of proline, H2O2, and malondialdehyde (MDA) and higher contents of antioxidants including ascorbic acid and total phenolics in WW and WS in E plants clearly demonstrated lesser oxidative damage. Further, A plants showed higher transcript abundance and antioxidant enzyme activities under WW as well as during initial stages of WS (15 days). However, with increasing drought imposition (30 days), A plants showed down regulation of antioxidant systems compared to their respective E plants. These results clearly demonstrated that future increased atmospheric CO2 enhances the photosynthetic potential and also mitigate the drought-induced oxidative stress in SRC mulberry. In conclusion, mulberry is a potential bio-energy tree crop which is best suitable for short rotation coppice forestry-based mitigation of increased [CO2] levels even under intermittent drought conditions, projected to prevail in the fast-changing global climate.
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Affiliation(s)
- Kalva Madhana Sekhar
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India
| | - Kanubothula Sitarami Reddy
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India
| | - Attipalli Ramachandra Reddy
- Department of Plant Sciences, University of Hyderabad, Gachibowli, Hyderabad, 500046, Andhra Pradesh, India.
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36
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Geng S, Misra BB, de Armas E, Huhman DV, Alborn HT, Sumner LW, Chen S. Jasmonate-mediated stomatal closure under elevated CO 2 revealed by time-resolved metabolomics. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 88:947-962. [PMID: 27500669 DOI: 10.1111/tpj.13296] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 08/01/2016] [Indexed: 05/18/2023]
Abstract
Foliar stomatal movements are critical for regulating plant water loss and gas exchange. Elevated carbon dioxide (CO2 ) levels are known to induce stomatal closure. However, the current knowledge on CO2 signal transduction in stomatal guard cells is limited. Here we report metabolomic responses of Brassica napus guard cells to elevated CO2 using three hyphenated metabolomics platforms: gas chromatography-mass spectrometry (MS); liquid chromatography (LC)-multiple reaction monitoring-MS; and ultra-high-performance LC-quadrupole time-of-flight-MS. A total of 358 metabolites from guard cells were quantified in a time-course response to elevated CO2 level. Most metabolites increased under elevated CO2 , showing the most significant differences at 10 min. In addition, reactive oxygen species production increased and stomatal aperture decreased with time. Major alterations in flavonoid, organic acid, sugar, fatty acid, phenylpropanoid and amino acid metabolic pathways indicated changes in both primary and specialized metabolic pathways in guard cells. Most interestingly, the jasmonic acid (JA) biosynthesis pathway was significantly altered in the course of elevated CO2 treatment. Together with results obtained from JA biosynthesis and signaling mutants as well as CO2 signaling mutants, we discovered that CO2 -induced stomatal closure is mediated by JA signaling.
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Affiliation(s)
- Sisi Geng
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, 32610, USA
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL, 32610, USA
| | - Biswapriya B Misra
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL, 32610, USA
| | - Evaldo de Armas
- Thermo Fisher Scientific, 1400 Northpoint Parkway, West Palm Beach, FL, 33407, USA
| | - David V Huhman
- Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA
| | - Hans T Alborn
- Chemistry Research Unit, Agricultural Research Service, United States Department of Agriculture, Gainesville, FL, 32608, USA
| | - Lloyd W Sumner
- Samuel Roberts Noble Foundation, Ardmore, OK, 73401, USA
| | - Sixue Chen
- Plant Molecular and Cellular Biology Program, University of Florida, Gainesville, FL, 32610, USA
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL, 32610, USA
- Proteomics and Mass Spectrometry, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, 32610, USA
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37
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Wang QJ, Sun H, Dong QL, Sun TY, Jin ZX, Hao YJ, Yao YX. The enhancement of tolerance to salt and cold stresses by modifying the redox state and salicylic acid content via the cytosolic malate dehydrogenase gene in transgenic apple plants. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:1986-97. [PMID: 26923485 PMCID: PMC5043475 DOI: 10.1111/pbi.12556] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 01/04/2016] [Accepted: 02/17/2016] [Indexed: 05/20/2023]
Abstract
In this study, we characterized the role of an apple cytosolic malate dehydrogenase gene (MdcyMDH) in the tolerance to salt and cold stresses and investigated its regulation mechanism in stress tolerance. The MdcyMDH transcript was induced by mild cold and salt treatments, and MdcyMDH-overexpressing apple plants possessed improved cold and salt tolerance compared to wild-type (WT) plants. A digital gene expression tag profiling analysis revealed that MdcyMDH overexpression largely altered some biological processes, including hormone signal transduction, photosynthesis, citrate cycle and oxidation-reduction. Further experiments verified that MdcyMDH overexpression modified the mitochondrial and chloroplast metabolisms and elevated the level of reducing power, primarily caused by increased ascorbate and glutathione, as well as the increased ratios of ascorbate/dehydroascorbate and glutathione/glutathione disulphide, under normal and especially stress conditions. Concurrently, the transgenic plants produced a high H2 O2 content, but a low O2·- production rate was observed compared to the WT plants. On the other hand, the transgenic plants accumulated more free and total salicylic acid (SA) than the WT plants under normal and stress conditions. Taken together, MdcyMDH conferred the transgenic apple plants a higher stress tolerance by producing more reductive redox states and increasing the SA level; MdcyMDH could serve as a target gene to genetically engineer salt- and cold-tolerant trees.
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Affiliation(s)
- Qing-Jie Wang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Hong Sun
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Qing-Long Dong
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Tian-Yu Sun
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Zhong-Xin Jin
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Yu-Jin Hao
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China
| | - Yu-Xin Yao
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong, China.
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38
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Martins MQ, Rodrigues WP, Fortunato AS, Leitão AE, Rodrigues AP, Pais IP, Martins LD, Silva MJ, Reboredo FH, Partelli FL, Campostrini E, Tomaz MA, Scotti-Campos P, Ribeiro-Barros AI, Lidon FJC, DaMatta FM, Ramalho JC. Protective Response Mechanisms to Heat Stress in Interaction with High [CO2] Conditions in Coffea spp. FRONTIERS IN PLANT SCIENCE 2016; 7:947. [PMID: 27446174 PMCID: PMC4925694 DOI: 10.3389/fpls.2016.00947] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 06/14/2016] [Indexed: 05/18/2023]
Abstract
Modeling studies have predicted that coffee crop will be endangered by future global warming, but recent reports highlighted that high [CO2] can mitigate heat impacts on coffee. This work aimed at identifying heat protective mechanisms promoted by CO2 in Coffea arabica (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown at 25/20°C (day/night), under 380 or 700 μL CO2 L(-1), and then gradually submitted to 31/25, 37/30, and 42/34°C. Relevant heat tolerance up to 37/30°C for both [CO2] and all coffee genotypes was observed, likely supported by the maintenance or increase of the pools of several protective molecules (neoxanthin, lutein, carotenes, α-tocopherol, HSP70, raffinose), activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT), and the upregulated expression of some genes (ELIP, Chaperonin 20). However, at 42/34°C a tolerance threshold was reached, mostly in the 380-plants and Icatu. Adjustments in raffinose, lutein, β-carotene, α-tocopherol and HSP70 pools, and the upregulated expression of genes related to protective (ELIPS, HSP70, Chape 20, and 60) and antioxidant (CAT, CuSOD2, APX Cyt, APX Chl) proteins were largely driven by temperature. However, enhanced [CO2] maintained higher activities of GR (Icatu) and CAT (Icatu and IPR108), kept (or even increased) the Cu,Zn-SOD, APX, and CAT activities, and promoted a greater upregulation of those enzyme genes, as well as those related to HSP70, ELIPs, Chaperonins in CL153, and Icatu. These changes likely favored the maintenance of reactive oxygen species (ROS) at controlled levels and contributed to mitigate of photosystem II photoinhibition at the highest temperature. Overall, our results highlighted the important role of enhanced [CO2] on the coffee crop acclimation and sustainability under predicted future global warming scenarios.
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Affiliation(s)
- Madlles Q. Martins
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- Departamento Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal Espírito SantoSão Mateus, Brazil
| | - Weverton P. Rodrigues
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- Setor Fisiologia Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte FluminenseRio de Janeiro, Brazil
| | - Ana S. Fortunato
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
| | - António E. Leitão
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
| | - Ana P. Rodrigues
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
| | - Isabel P. Pais
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e VeterináriaOeiras, Portugal
| | - Lima D. Martins
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- Departamento Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito SantoAlegre, Brazil
| | - Maria J. Silva
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
| | - Fernando H. Reboredo
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
| | - Fábio L. Partelli
- Departamento Ciências Agrárias e Biológicas, Centro Universitário Norte do Espírito Santo, Universidade Federal Espírito SantoSão Mateus, Brazil
| | - Eliemar Campostrini
- Setor Fisiologia Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte FluminenseRio de Janeiro, Brazil
| | - Marcelo A. Tomaz
- Departamento Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito SantoAlegre, Brazil
| | - Paula Scotti-Campos
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e VeterináriaOeiras, Portugal
| | - Ana I. Ribeiro-Barros
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
| | - Fernando J. C. Lidon
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
| | - Fábio M. DaMatta
- Departamento Biologia Vegetal, Universidade Federal de ViçosaViçosa, Brazil
| | - José C. Ramalho
- Grupo Interações Planta-Ambiente and Biodiversidade (PlantStress&Biodiversity), Departamento Recursos Naturais, Ambiente e Território (DRAT), Linking Landscape, Environment, Agriculture and Food (LEAF), and Forest Research Center (CEF), Instituto Superior de Agronomia, Universidade de LisboaOeiras, Portugal
- GeoBioTec, Faculdade Ciências Tecnologia, Universidade NOVA de LisboaCaparica, Portugal
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Waqas M, Shahzad R, Khan AL, Asaf S, Kim YH, Kang SM, Bilal S, Hamayun M, Lee IJ. Salvaging effect of triacontanol on plant growth, thermotolerance, macro-nutrient content, amino acid concentration and modulation of defense hormonal levels under heat stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 99:118-125. [PMID: 26744997 DOI: 10.1016/j.plaphy.2015.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 12/18/2015] [Accepted: 12/22/2015] [Indexed: 06/05/2023]
Abstract
In this study, it was hypothesized that application of triacontanol, a ubiquitous saturated primary alcohol, at different times-before (TBHS), mid (TMHS), and after (TAHS) heat stress-will extend heat stress (HS) protection in mungbean. The effect of triacontanol on the levels of defense hormones abscisic acid (ABA) and jasmonic acid (JA) was investigated along with the plant growth promotion, nutrient and amino acid content with and without heat stress. Heat stress caused a prominent reduction in plant growth attributes, nutrient and amino acid content, which were attributed to the decreased level of ABA and JA. However, application of triacontanol, particularly in the TBHS and TMHS treatments, reversed the deleterious effects of HS by showing increased ABA and JA levels that favored the significant increase in plant growth attributes, enhanced nutrient content, and high amount of amino acid. TAHS, a short-term application of triacontanol, also significantly increased ABA and JA levels and thus revealed important information of its association with hormonal modulation. The growth-promoting effect of triacontanol was also confirmed under normal growth conditions. To the best of our knowledge, this study is the first to demonstrate the beneficial effects of triacontanol, with or without heat stress, on mungbean and its interaction with or regulation of the levels of defense hormones.
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Affiliation(s)
- Muhammad Waqas
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea; Department of Agriculture Extension, Buner 19290, Pakistan
| | - Raheem Shahzad
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Abdul Latif Khan
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea; UoN Chair of Oman's Medicinal Plants & Marine Natural Products, University of Nizwa, Nizwa 616, Oman
| | - Sajjad Asaf
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Yoon-Ha Kim
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea; Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Sang-Mo Kang
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Saqib Bilal
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Muhammad Hamayun
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea; Department of Botany, Abdul Wali Khan University, Mardan, Pakistan
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea.
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AbdElgawad H, De Vos D, Zinta G, Domagalska MA, Beemster GTS, Asard H. Grassland species differentially regulate proline concentrations under future climate conditions: an integrated biochemical and modelling approach. THE NEW PHYTOLOGIST 2015; 208:354-69. [PMID: 26037253 PMCID: PMC4744684 DOI: 10.1111/nph.13481] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/13/2015] [Indexed: 05/18/2023]
Abstract
Proline (Pro) is a versatile metabolite playing a role in the protection of plants against environmental stresses. To gain a deeper understanding of the regulation of Pro metabolism under predicted future climate conditions, including drought stress, elevated temperature and CO2 , we combined measurements in contrasting grassland species (two grasses and two legumes) at multiple organisational levels, that is, metabolite concentrations, enzyme activities and gene expression. Drought stress (D) activates Pro biosynthesis and represses its catabolism, and elevated temperature (DT) further elevated its content. Elevated CO2 attenuated the DT effect on Pro accumulation. Computational pathway control analysis allowed a mechanistic understanding of the regulatory changes in Pro metabolism. This analysis indicates that the experimentally observed coregulation of multiple enzymes is more effective in modulating Pro concentrations than regulation of a single step. Pyrroline-5-carboxylate synthetase (P5CS) and pyrroline-5-carboxylate reductase (P5CR) play a central role in grasses (Lolium perenne, Poa pratensis), and arginase (ARG), ornithine aminotransferase (OAT) and P5CR play a central role in legumes (Medicago lupulina, Lotus corniculatus). Different strategies in the regulation of Pro concentrations under stress conditions were observed. In grasses the glutamate pathway is activated predominantly, and in the legumes the ornithine pathway, possibly related to differences in N-nutritional status.
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Affiliation(s)
- Hamada AbdElgawad
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
- Department of BotanyFaculty of ScienceUniversity of Beni‐SueifBeni‐Sueif62511Egypt
| | - Dirk De Vos
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
- Department of Mathematics and Computer ScienceUniversity of AntwerpB‐2020AntwerpBelgium
| | - Gaurav Zinta
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
| | - Malgorzata A. Domagalska
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
- Molecular Parasitology UnitDepartment of Medical SciencesInstitute of Tropical MedicineAntwerpBelgium
| | - Gerrit T. S. Beemster
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
| | - Han Asard
- Laboratory for Molecular Plant Physiology and BiotechnologyDepartment of BiologyUniversity of AntwerpB‐2020AntwerpBelgium
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Ahammed GJ, Li X, Yu J, Shi K. NPR1-dependent salicylic acid signaling is not involved in elevated CO2-induced heat stress tolerance in Arabidopsis thaliana. PLANT SIGNALING & BEHAVIOR 2015; 10:e1011944. [PMID: 25874349 PMCID: PMC4622482 DOI: 10.1080/15592324.2015.1011944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/18/2015] [Indexed: 05/08/2023]
Abstract
Elevated CO2 can protect plants from heat stress (HS); however, the underlying mechanisms are largely unknown. Here, we used a set of Arabidopsis mutants such as salicylic acid (SA) signaling mutants nonexpressor of pathogenesis-related gene 1 (npr1-1 and npr1-5) and heat-shock proteins (HSPs) mutants (hsp21 and hsp70-1) to understand the requirement of SA signaling and HSPs in elevated CO2-induced HS tolerance. Under ambient CO2 (380 µmol mol(-1)) conditions, HS (42°C, 24 h) drastically decreased maximum photochemical efficiency of PSII (Fv/Fm) in all studied plant groups. Enrichment of CO2 (800 µmol mol(-1)) with HS remarkably increased the Fv/Fm value in all plant groups except hsp70-1, indicating that NPR1-dependent SA signaling is not involved in the elevated CO2-induced HS tolerance. These results also suggest an essentiality of HSP70-1, but not HSP21 in elevated CO2-induced HS mitigation.
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Affiliation(s)
- Golam Jalal Ahammed
- Department of Horticulture; Zijingang Campus; Zhejiang University; Hangzhou, China
| | - Xin Li
- Tea Research Insititute; Chinese Academy of Agricultural Science; Hangzhou, China
- Department of Horticulture; Zijingang Campus; Zhejiang University; Hangzhou, China
| | - Jingquan Yu
- Department of Horticulture; Zijingang Campus; Zhejiang University; Hangzhou, China
| | - Kai Shi
- Department of Horticulture; Zijingang Campus; Zhejiang University; Hangzhou, China
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