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Lu X, Li Y, Akhtar M, Liu C, Ma T, Min W, Bai X, She Y, Chen L, Tian L, Li P, Luo C. A DUF966 gene family member OsDSR3 positively regulates alkali stress tolerance in rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 343:112072. [PMID: 38513731 DOI: 10.1016/j.plantsci.2024.112072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/03/2024] [Accepted: 03/18/2024] [Indexed: 03/23/2024]
Abstract
Rice growth and production are severely constrained by alkali stress. However, the mechanism underlying the rice tolerance to alkali stress is unclear. OsDSR3, a novel gene from the domains of unknown function 966 (DUF966) family, was identified and characterized for its function in the response of rice to alkali stress. The result of this study clearly showed that alkali stress significantly induced OsDSR3 expression level. Moreover, the expression of OsDSR3 was up-regulated by drought, salt, cold, H2O2 and abscisic acid (ABA), and down-regulated by gibberellic acid (GA3), and 2,4-Dichlorophenoxyacetic acid (2,4-D) treatments. Subcellular localization exhibited that OsDSR3 was detected in the nucleus and membrane. OsDSR3-overexpressing (OsDSR3-OE) plants showed higher tolerance to alkali stress than the wild-type (WT). In contrast, OsDSR3 knockout (OsDSR3-KO) mutants were more vulnerable to alkali stress. The differentially expressed genes (DEGs) among OsDSR3-OE and WT seedlings were mainly enriched in porphyrin and chlorophyll, starch and sucrose, and carotenoid metabolic pathways. Among these DEGs, 26 were identified as potential alkali stress-responsive genes, including several up-regulated genes like OsHAK5, OsGRX23 and OsNIR2. Consistent with the expression profiles of metabolic pathways-related genes, most of the metabolite contents and metabolite synthases activities were improved in OsDSR3-OE lines and decreased in OsDSR3-KO lines compared to WT. This may explain the higher tolerance of OE lines and lower tolerance of KO lines to alkali stress. These findings suggested that OsDSR3 positively regulates rice tolerance to alkali stress, which will help to elucidate the molecular mechanism underlying rice alkali tolerance.
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Affiliation(s)
- Xuping Lu
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Yan Li
- School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Maryam Akhtar
- College of Life Science, Northwest Normal University, Lanzhou 730070, China
| | - Caixia Liu
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Tianli Ma
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Weifang Min
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Xiaorong Bai
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Yangmengfei She
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Liang Chen
- School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Lei Tian
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Peifu Li
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Chengke Luo
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China.
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Tan S, Sha Y, Sun L, Li Z. Abiotic Stress-Induced Leaf Senescence: Regulatory Mechanisms and Application. Int J Mol Sci 2023; 24:11996. [PMID: 37569371 PMCID: PMC10418887 DOI: 10.3390/ijms241511996] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023] Open
Abstract
Leaf senescence is a natural phenomenon that occurs during the aging process of plants and is influenced by various internal and external factors. These factors encompass plant hormones, as well as environmental pressures such as inadequate nutrients, drought, darkness, high salinity, and extreme temperatures. Abiotic stresses accelerate leaf senescence, resulting in reduced photosynthetic efficiency, yield, and quality. Gaining a comprehensive understanding of the molecular mechanisms underlying leaf senescence in response to abiotic stresses is imperative to enhance the resilience and productivity of crops in unfavorable environments. In recent years, substantial advancements have been made in the study of leaf senescence, particularly regarding the identification of pivotal genes and transcription factors involved in this process. Nevertheless, challenges remain, including the necessity for further exploration of the intricate regulatory network governing leaf senescence and the development of effective strategies for manipulating genes in crops. This manuscript provides an overview of the molecular mechanisms that trigger leaf senescence under abiotic stresses, along with strategies to enhance stress tolerance and improve crop yield and quality by delaying leaf senescence. Furthermore, this review also highlighted the challenges associated with leaf senescence research and proposes potential solutions.
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Affiliation(s)
| | | | - Liwei Sun
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Zhonghai Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
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Niu X, Lu H, Fan Y, Wang W, Yuan Y, Hawkins M, Zhang J, Ye Z, Miao M, Liu Y, Xiao F. Manipulation of the transcription factor SlNAC1 for improved tolerance to abiotic stress in tomato. PLANT, CELL & ENVIRONMENT 2022; 45:3537-3550. [PMID: 36128662 DOI: 10.1111/pce.14437] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/15/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
The tomato transcription factor SlNAC1 plays an important role in abiotic stress response and is fine-tuned at both transcriptional and posttranslational levels. The SlNAC1 gene is strongly induced by multiple abiotic stresses and the SlNAC1 protein is subjected to ubiquitin proteasome-mediated degradation. We found here that SlNAC1 possesses two distinct transactivation domains (TADs), TAD1 and TAD2. Significantly, the instability of SlNAC1 was attributed to the acidic amino acid-rich TAD1, in which the instability and transcriptional potential of TAD1 functionally overlapped; whereas the glutamine-rich TAD2 was stable and accounted for the abiotic stress signalling mediated by SlNAC1. Towards the goal of enhanced tolerance to abiotic stress in tomatoes, we manipulated SlNAC1 at both gene and protein levels: we generated a stable and functional SlNAC1 mutant SlNAC1∆191-270 by removing TAD1 and further engineered it to be stress-controllable by fusing the corresponding cDNA with the abiotic stress-inducible promoter ProStNAC1 . Transgenic tomato plants expressing the ProStNAC1 ::SlNAC1∆191-270 transgene did not display any undesired traits and exhibited enhanced tolerance to cold, drought and salt stresses. Taken together, our manipulation of the stress-related transcription factor via conditional expression of its derived stable and functional mutant provides a successful example for developing crops dynamically adapted to abiotic stress.
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Affiliation(s)
- Xiangli Niu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Han Lu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Youhong Fan
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Wenjie Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Yulin Yuan
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Madigan Hawkins
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Junhong Zhang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
| | - Zhibiao Ye
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, China
| | - Min Miao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
| | - Yongsheng Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, China
- State Key Laboratory of Tea Plant Biology and Utilization, School of Horticulture, Anhui Agricultural University, Hefei, China
- Ministry of Education Key Laboratory for Bio-resource and Eco-environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Fangming Xiao
- Department of Plant Sciences, University of Idaho, Moscow, Idaho, USA
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Lu X, Min W, Shi Y, Tian L, Li P, Ma T, Zhang Y, Luo C. Exogenous Melatonin Alleviates Alkaline Stress by Removing Reactive Oxygen Species and Promoting Antioxidant Defence in Rice Seedlings. FRONTIERS IN PLANT SCIENCE 2022; 13:849553. [PMID: 35356121 PMCID: PMC8959771 DOI: 10.3389/fpls.2022.849553] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 02/07/2022] [Indexed: 05/05/2023]
Abstract
Saline-alkali stress seriously restricts rice growth, development, and production in northern China. The damage of alkaline stress on rice is much greater than that of salt due to ion toxicity, osmotic stress, and especially high pH. As a signal molecule, melatonin (N-acetyl-5-methoxytryptamine, MT) mediates many physiological processes in rice and participates in protecting rice from abiotic stress. The potential mechanism of exogenous melatonin-mediated alkaline stress tolerance is still largely unknown. In this study, the effects of melatonin on the morphological change, physiological property, and corresponding genes expression in rice seedlings were analyzed under alkaline stress (20 mmol L-1, pH 9.55). The results showed that the expression levels of MT synthesis genes (TDC2, T5H, SNAT, ASMT1, and ASMT2) were induced by both exogenous MT and alkaline stress treatment. The cell membrane was protected by MT, and the MT furtherly play role in scavenging reactive oxygen species (ROS), reducing lipoxygenase (LOX) activity, and malondialdehyde (MDA) content. The scavenging of ROS by melatonin is attributed to the coupling of the improvement of redox homeostasis and the enhancement of antioxidant enzyme activity and antioxidant content by upregulating the transcriptional levels of antioxidase genes. In the meantime, MT pretreatment promoted the accumulation of free proline, sucrose, and fructose by regulating the OsP5CS, OsSUS7, and OsSPS1 gene expression level and increased chlorophyll content upregulating the expression of chlorophyll synthesis-related genes. Ultimately, the alleviating effect of exogenous melatonin on alkaline stress was reflected in increasing the leaf relative water content (RWC) and root-shoot ratio and reducing the leaf tip wilt index (TWI) through a series of physiological and biochemical changes. Melatonin pretreatment changed the expression level of MT synthesis genes which might contribute to MT synthesis in rice, consequently, activated the ROS scavenging system and alleviating the damage of alkaline stress on rice seedlings. Our study comprehensively understands the alleviating effect of exogenous melatonin on rice under alkaline stress.
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Guo Y, Ren G, Zhang K, Li Z, Miao Y, Guo H. Leaf senescence: progression, regulation, and application. MOLECULAR HORTICULTURE 2021; 1:5. [PMID: 37789484 PMCID: PMC10509828 DOI: 10.1186/s43897-021-00006-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/11/2021] [Indexed: 05/24/2023]
Abstract
Leaf senescence, the last stage of leaf development, is a type of postmitotic senescence and is characterized by the functional transition from nutrient assimilation to nutrient remobilization which is essential for plants' fitness. The initiation and progression of leaf senescence are regulated by a variety of internal and external factors such as age, phytohormones, and environmental stresses. Significant breakthroughs in dissecting the molecular mechanisms underpinning leaf senescence have benefited from the identification of senescence-altered mutants through forward genetic screening and functional assessment of hundreds of senescence-associated genes (SAGs) via reverse genetic research in model plant Arabidopsis thaliana as well as in crop plants. Leaf senescence involves highly complex genetic programs that are tightly tuned by multiple layers of regulation, including chromatin and transcription regulation, post-transcriptional, translational and post-translational regulation. Due to the significant impact of leaf senescence on photosynthesis, nutrient remobilization, stress responses, and productivity, much effort has been made in devising strategies based on known senescence regulatory mechanisms to manipulate the initiation and progression of leaf senescence, aiming for higher yield, better quality, or improved horticultural performance in crop plants. This review aims to provide an overview of leaf senescence and discuss recent advances in multi-dimensional regulation of leaf senescence from genetic and molecular network perspectives. We also put forward the key issues that need to be addressed, including the nature of leaf age, functional stay-green trait, coordination between different regulatory pathways, source-sink relationship and nutrient remobilization, as well as translational researches on leaf senescence.
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Affiliation(s)
- Yongfeng Guo
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, 266101 Shandong China
| | - Guodong Ren
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai, 200438 China
| | - Kewei Zhang
- Institute of Plant Genetics and Developmental Biology, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004 Zhejiang China
| | - Zhonghai Li
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, 100083 China
| | - Ying Miao
- Fujian Provincial Key Laboratory of Plant Functional Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian China
| | - Hongwei Guo
- Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, 518055 Guangdong China
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Huang X, Zhang H, Wang Q, Guo R, Wei L, Song H, Kuang W, Liao J, Huang Y, Wang Z. Genome-wide identification and characterization of long non-coding RNAs involved in flag leaf senescence of rice. PLANT MOLECULAR BIOLOGY 2021; 105:655-684. [PMID: 33569692 PMCID: PMC7985109 DOI: 10.1007/s11103-021-01121-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 01/17/2021] [Indexed: 05/30/2023]
Abstract
KEY MESSAGE This study showed the systematic identification of long non-coding RNAs (lncRNAs) involving in flag leaf senescence of rice, providing the possible lncRNA-mRNA regulatory relationships and lncRNA-miRNA-mRNA ceRNA networks during leaf senescence. LncRNAs have been reported to play crucial roles in diverse biological processes. However, no systematic identification of lncRNAs associated with leaf senescence in plants has been studied. In this study, a genome-wide high throughput sequencing analysis was performed using rice flag leaves developing from normal to senescence. A total of 3953 lncRNAs and 38757 mRNAs were identified, of which 343 lncRNAs and 9412 mRNAs were differentially expressed. Through weighted gene co-expression network analysis (WGCNA), 22 continuously down-expressed lncRNAs targeting 812 co-expressed mRNAs and 48 continuously up-expressed lncRNAs targeting 1209 co-expressed mRNAs were considered to be significantly associated with flag leaf senescence. Gene Ontology results suggested that the senescence-associated lncRNAs targeted mRNAs involving in many biological processes, including transcription, hormone response, oxidation-reduction process and substance metabolism. Additionally, 43 senescence-associated lncRNAs were predicted to target 111 co-expressed transcription factors. Interestingly, 8 down-expressed lncRNAs and 29 up-expressed lncRNAs were found to separately target 12 and 20 well-studied senescence-associated genes (SAGs). Furthermore, analysis on the competing endogenous RNA (CeRNA) network revealed that 6 down-expressed lncRNAs possibly regulated 51 co-expressed mRNAs through 15 miRNAs, and 14 up-expressed lncRNAs possibly regulated 117 co-expressed mRNAs through 21 miRNAs. Importantly, by expression validation, a conserved miR164-NAC regulatory pathway was found to be possibly involved in leaf senescence, where lncRNA MSTRG.62092.1 may serve as a ceRNA binding with miR164a and miR164e to regulate three transcription factors. And two key lncRNAs MSTRG.31014.21 and MSTRG.31014.36 also could regulate the abscisic-acid biosynthetic gene BGIOSGA025169 (OsNCED4) and BGIOSGA016313 (NAC family) through osa-miR5809. The possible regulation networks of lncRNAs involving in leaf senescence were discussed, and several candidate lncRNAs were recommended for prior transgenic analysis. These findings will extend the understanding on the regulatory roles of lncRNAs in leaf senescence, and lay a foundation for functional research on candidate lncRNAs.
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Affiliation(s)
- Xiaoping Huang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Hongyu Zhang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Qiang Wang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Rong Guo
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Lingxia Wei
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Haiyan Song
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
| | - Weigang Kuang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
| | - Jianglin Liao
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, Hunan Province, China
| | - Yingjin Huang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China.
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China.
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, Hunan Province, China.
| | - Zhaohai Wang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, 330045, Jiangxi Province, China.
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang City, 330045, Jiangxi Province, China.
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha, 410128, Hunan Province, China.
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