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Zhang Y, Yang Z, Yang Y, Han A, Rehneke L, Ding L, Wei Y, Liu Z, Meng Y, Schäfer P, Shan W. A symbiont fungal effector relocalizes a plastidic oxidoreductase to nuclei to induce resistance to pathogens and salt stress. Curr Biol 2024; 34:2957-2971.e8. [PMID: 38917798 DOI: 10.1016/j.cub.2024.05.064] [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: 01/12/2024] [Revised: 04/24/2024] [Accepted: 05/29/2024] [Indexed: 06/27/2024]
Abstract
The root endophytic fungus Serendipita indica establishes beneficial symbioses with a broad spectrum of plants and enhances host resilience against biotic and abiotic stresses. However, little is known about the mechanisms underlying S. indica-mediated plant protection. Here, we report S. indica effector (SIE) 141 and its host target CDSP32, a conserved thioredoxin-like protein, and underlying mechanisms for enhancing pathogen resistance and abiotic salt tolerance in Arabidopsis thaliana. SIE141 binding interfered with canonical targeting of CDSP32 to chloroplasts, leading to its re-location into the plant nucleus. This nuclear translocation is essential for both their interaction and resistance function. Furthermore, SIE141 enhanced oxidoreductase activity of CDSP32, leading to CDSP32-mediated monomerization and activation of NON-EXPRESSOR OF PATHOGENESIS-RELATED 1 (NPR1), a key regulator of systemic resistance. Our findings provide functional insights on how S. indica transfers well-known beneficial effects to host plants and indicate CDSP32 as a genetic resource to improve plant resilience to abiotic and biotic stresses.
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Affiliation(s)
- Yingqi Zhang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ziran Yang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yang Yang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Aiping Han
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Laura Rehneke
- Institute of Phytopathology, Land Use and Nutrition, Research Centre for BioSystems, Justus Liebig University, 35392 Giessen, Germany
| | - Liwen Ding
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yushu Wei
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zeming Liu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuling Meng
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Patrick Schäfer
- Institute of Phytopathology, Land Use and Nutrition, Research Centre for BioSystems, Justus Liebig University, 35392 Giessen, Germany
| | - Weixing Shan
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China.
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Tong L, Lin M, Zhu L, Liao B, Lu L, Lu Y, Chen J, Shi J, Hao Z. Unraveling the Role of the Liriodendron Thioredoxin (TRX) Gene Family in an Abiotic Stress Response. PLANTS (BASEL, SWITZERLAND) 2024; 13:1674. [PMID: 38931106 PMCID: PMC11207409 DOI: 10.3390/plants13121674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 05/25/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024]
Abstract
Thioredoxin (TRX) is a small protein with REDOX activity that plays a crucial role in a plant's growth, development, and stress resistance. The TRX family has been extensively studied in Arabidopsis, rice, and wheat, and so it is likely that its members have similar biological functions in Liriodendron that have not been reported in Liriodendron. In this study, we performed the genome-wide identification of the TRX gene family based on the Liriodendron chinense genome, leading to a total of 42 LcTRX gene members. A phylogenetic analysis categorized these 42 LcTRX proteins into 13 subfamilies. We further characterized their chromosome distributions, gene structures, conserved protein motifs, and cis-elements in the promoter regions. In addition, based on the publicly available transcriptome data for Liriodendron hybrid and following RT-qPCR experiments, we explored the expression patterns of LhTRXs to different abiotic stressors, i.e., drought, cold, and heat stress. Notably, we found that several LhTRXs, especially LhTRX-h3, were significantly upregulated in response to abiotic stress. In addition, the subcellular localization assay showed that LhTRX-h3 was mainly distributed in the cytoplasm. Subsequently, we obtained LhTRX-h3 overexpression (OE) and knockout (KO) callus lines in Liriodendron hybrid. Compared to the wild type (WT) and LhTRX-h3-KO callus proliferation of LhTRX-h3-OE lines was significantly enhanced with reduced reactive oxygen species (ROS) accumulation under drought stress. Our findings that LhTRX-h3 is sufficient to improve drought tolerance. and underscore the significance of the TRX gene family in environmental stress responses in Liriodendron.
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Affiliation(s)
- Lu Tong
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Mengyuan Lin
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Liming Zhu
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Bojun Liao
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Lu Lu
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Ye Lu
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Jinhui Chen
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Jisen Shi
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
| | - Zhaodong Hao
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; (L.T.); (M.L.); (L.Z.); (B.L.); (L.L.); (Y.L.); (J.C.)
- Key Laboratory of Forest Genetics & Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China
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Kim TL, Lim H, Denison MIJ, Oh C. Transcriptomic and Physiological Analysis Reveals Genes Associated with Drought Stress Responses in Populus alba × Populus glandulosa. PLANTS (BASEL, SWITZERLAND) 2023; 12:3238. [PMID: 37765403 PMCID: PMC10535988 DOI: 10.3390/plants12183238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/07/2023] [Accepted: 09/10/2023] [Indexed: 09/29/2023]
Abstract
Drought stress affects plant productivity by altering plant responses at the morphological, physiological, and molecular levels. In this study, we identified physiological and genetic responses in Populus alba × Populus glandulosa hybrid clones 72-30 and 72-31 after 12 days of exposure to drought treatment. After 12 days of drought treatment, glucose, fructose, and sucrose levels were significantly increased in clone 72-30 under drought stress. The Fv/Fo and Fv/Fm values in both clones also decreased under drought stress. The changes in proline, malondialdehyde, and H2O2 levels were significant and more pronounced in clone 72-30 than in clone 72-31. The activities of antioxidant-related enzymes, such as catalase and ascorbate peroxidase, were significantly higher in the 72-31 clone. To identify drought-related genes, we conducted a transcriptomic analysis in P. alba × P. glandulosa leaves exposed to drought stress. We found 883 up-regulated and 305 down-regulated genes in the 72-30 clone and 279 and 303 in the 72-31 clone, respectively. These differentially expressed genes were mainly in synthetic pathways related to proline, abscisic acid, and antioxidants. Overall, clone 72-31 showed better drought tolerance than clone 72-30 under drought stress, and genetic changes also showed different patterns.
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Affiliation(s)
- Tae-Lim Kim
- Department of Forest Bioresources, National Institute of Forest Science, Suwon 16631, Republic of Korea; (T.-L.K.); (C.O.)
| | - Hyemin Lim
- Department of Forest Bioresources, National Institute of Forest Science, Suwon 16631, Republic of Korea; (T.-L.K.); (C.O.)
| | | | - Changyoung Oh
- Department of Forest Bioresources, National Institute of Forest Science, Suwon 16631, Republic of Korea; (T.-L.K.); (C.O.)
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Wang Z, Yang J, Gao Q, He S, Xu Y, Luo Z, Liu P, Wu M, Xu X, Ma L, Zhang Z, Yang Y, Yang J. The transcription factor NtERF13a enhances abiotic stress tolerance and phenylpropanoid compounds biosynthesis in tobacco. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 334:111772. [PMID: 37331634 DOI: 10.1016/j.plantsci.2023.111772] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/19/2023] [Accepted: 06/12/2023] [Indexed: 06/20/2023]
Abstract
The AP2/ERF (APETALA2/ETHYLENE RESPONSE FACTOR) transcription factors play multiple roles in modulating the biosynthesis of diverse specialized metabolites in response to various environmental stresses. ERF13 has been shown to participate in plant resistance to biotic stress as well as in repressing the synthesis of fatty acid. However, its full roles in regulating plant metabolism and stress resistance still remains to be further studied. In this study, we identified two NtERF genes from N. tabacum genome that belong to Ⅸa subgroup of ERF family. Over-expression and knock-out of NtERF13a showed that NtERF13a could enhance plant resistance to salt and drought stresses, as well as promoted the biosynthesis of chlorogenic acid (CGA), flavonoids, and lignin in tobacco. Transcriptome analysis between WT and NtERF13a-OE plants revealed 6 differentially expressed genes (DEGs) that encode enzymes catalyzing the key steps of phenylpropanoid pathway. Chromatin immunoprecipitation, Y1H, and Dual-Luc assays further clarified that NtERF13a could directly bind to the fragments containing GCC box or DRE element in the promoters of NtHCT, NtF3'H, and NtANS genes to induce the transcription of these genes. Knock-out of NtHCT, NtF3'H, or NtANS in the NtERF13a-OE background significantly repressed the increase of phenylpropanoid compound contents caused by over-expression of NtERF13a, indicating that the promotion of NtERF13a on the phenylpropanoid compound contents depends on the activity of NtHCT, NtF3'H, and NtANS. Our study demonstrated new roles of NtERF13a in promoting plant resistance to abiotic stresses, and provided a promising target for modulating the biosynthesis of phenylpropanoid compounds in tobacco.
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Affiliation(s)
- Zhong Wang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Jinchu Yang
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China
| | - Qian Gao
- Yunnan Key Laboratory of Tobacco Chemistry, R&D Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming 650202, China
| | - Shun He
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Yongming Xu
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China
| | - Zhaopeng Luo
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Pingping Liu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Mingzhu Wu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Xin Xu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Lanxin Ma
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China
| | - Zhan Zhang
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China
| | - Yongfeng Yang
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China.
| | - Jun Yang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, China.
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Rostampour P, Hamidian M, Movahhedi Dehnavi M, Saeidimajd GA. Evaluation of osmoregulation and morpho-physiological responses of Borago officinalis under drought and salinity stress with equal osmotic potential. BIOCHEM SYST ECOL 2023. [DOI: 10.1016/j.bse.2022.104567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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6
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Geng L, Ren J, Ji X, Yan S, Song XS. Over-expression of DREB46 enhances drought tolerance in Populus trichocarpa. JOURNAL OF PLANT PHYSIOLOGY 2023; 281:153923. [PMID: 36657232 DOI: 10.1016/j.jplph.2023.153923] [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: 10/16/2022] [Revised: 12/20/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
The drought responsive element binding (DREB) gene family has a significant role in plant abiotic stress responses. Here, we cloned a drought-inducible DREB gene, DREB46 (Potri.019G075500), and investigated its function in drought tolerance in Populus trichocarpa. Under treatment with exogenous abscisic acid and 6% PEG6000, DREB46 was rapidly and abundantly expressed. We successfully inserted P. trichocarpa DREB46 constructs into P. trichocarpa. After 11 d of drought stress and 3 d of rehydration treatment, the DREB46 over-expression (OE) lines exhibited significantly increased survival rates relative to the wild type (WT). Histochemical staining showed that the accumulation of reactive oxygen species (ROS) in transgenic plants under drought stress was lower than that in WT plants. Furthermore, OE plants displayed higher superoxide dismutase, peroxidase, and catalase activities and proline content, but lower malondialdehyde content than the WT plants under drought stress. In contrast, DREB46-RNA interference (RNAi) lines exhibited the opposite phenotype. Under PEG-6000 stress, OE plants produced significantly more adventitious roots (ARs) than WT plants. In contrast, RNAi-mediated DREB46-inhibited poplar exhibited fewer ARs. Quantitative real-time PCR indicated that WOX11/12a (Potri.013G066900), a gene related to root growth and development regulation, was significantly increased in OE plants. Additionally, yeast two-hybrid (Y2H) assays showed that DREB46 could interact with protein kinase MPK1 (Potri.002G032100) and protein phosphatase PP2C47 (Potri.007G058700), respectively, and this result was also verified by luciferase complementation assay. Transient co-expression results of leaves showed that PP2C47 and DREB46 Agrobacterium-transformed leaves had strong drought tolerance. These results show that DREB46 plays a key role in drought tolerance by inducing the ROS scavenging system and increasing the number of ARs.
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Affiliation(s)
- Liangzhuang Geng
- Department of Genetics, College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Jing Ren
- College of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Xiaolong Ji
- Department of Genetics, College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Shaopeng Yan
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China; Department of Genetics, College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Xing Shun Song
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, 150040, China; Department of Genetics, College of Life Science, Northeast Forestry University, Harbin, 150040, China.
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Yang F, Lv G. Characterization of the gene expression profile response to drought stress in Haloxylon using PacBio single-molecule real-time and Illumina sequencing. FRONTIERS IN PLANT SCIENCE 2022; 13:981029. [PMID: 36051288 PMCID: PMC9424927 DOI: 10.3389/fpls.2022.981029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Haloxylon ammodendron and Haloxylon persicum are important drought-tolerant plants in northwest China. The whole-genome sequencing of H. ammodendron and H. persicum grown in their natural environment is incomplete, and their transcriptional regulatory network in response to drought environment remains unclear. To reveal the transcriptional responses of H. ammodendron and H. persicum to an arid environment, we performed single-molecule real-time (SMRT) and Illumina RNA sequencing. In total, 20,246,576 and 908,053 subreads and 435,938 and 210,334 circular consensus sequencing (CCS) reads were identified by SMRT sequencing of H. ammodendron and H. persicum, and 15,238 and 10,135 unigenes, respectively, were successfully obtained. In addition, 9,794 and 7,330 simple sequence repeats (SSRs) and 838 and 71 long non-coding RNAs were identified. In an arid environment, the growth of H. ammodendron was restricted; plant height decreased significantly; basal and branch diameters became thinner and hydrogen peroxide (H2O2) content and peroxidase (POD) activity were increased. Under dry and wet conditions, 11,803 and 15,217 differentially expressed genes (DEGs) were identified in H. ammodendron and H. persicum, respectively. There were 319 and 415 DEGs in the signal transduction pathways related to drought stress signal perception and transmission, including the Ca2+ signal pathway, the ABA signal pathway, and the MAPK signal cascade. In addition, 217 transcription factors (TFs) and 398 TFs of H. ammodendron and H. persicum were differentially expressed, including FAR1, MYB, and AP2/ERF. Bioinformatic analysis showed that under drought stress, the expression patterns of genes related to active oxygen [reactive oxygen species (ROS)] scavenging, functional proteins, lignin biosynthesis, and glucose metabolism pathways were altered. Thisis the first full-length transcriptome report concerning the responses of H. ammodendron and H. persicum to drought stress. The results provide a foundation for further study of the adaptation to drought stress. The full-length transcriptome can be used in genetic engineering research.
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Affiliation(s)
- Fang Yang
- School of Ecology and Environment, Xinjiang University, Ürümqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Ürümqi, China
- Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem, Ministry of Education, Ürümqi, China
| | - Guanghui Lv
- School of Ecology and Environment, Xinjiang University, Ürümqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Ürümqi, China
- Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem, Ministry of Education, Ürümqi, China
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Raja V, Wani UM, Wani ZA, Jan N, Kottakota C, Reddy MK, Kaul T, John R. Pyramiding ascorbate-glutathione pathway in Lycopersicum esculentum confers tolerance to drought and salinity stress. PLANT CELL REPORTS 2022; 41:619-637. [PMID: 34383122 DOI: 10.1007/s00299-021-02764-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Stacking Glutathione-Ascorbate pathway genes (PgSOD, PgAPX, PgGR, PgDHAR and PgMDHAR) under stress inducible promoter RD29A imparts significant tolerance to drought and salinity stress in Solanum lycopersicum. Although the exposure of plants to different environmental stresses results in overproduction of reactive oxygen species (ROS), many plants have developed some unique systems to alleviate the ROS production and mitigate its deleterious effect. One of the key pathways that gets activated in plants is ascorbate glutathione (AsA-GSH) pathway. To demonstrate the effect of this pathway in tomato, we developed the AsA-GSH overexpression lines by stacking the genes of the AsA-GSH pathway genes isolated from Pennisetum glaucoma (Pg) including PgSOD, PgAPX, PgGR, PgDHAR and PgMDHAR under stress inducible promoter RD29A. The overexpression lines have an improved germination and seedling growth with concomitant elevation in the survival rate. The exposure of transgenic seedlings to varying stress regiments exhibited escalation in the antioxidant enzyme activity and lesser membrane damage as reflected by decreased electrolytic leakage and little accumulation of malondialdehyde and H2O2. Furthermore, the transgenic lines accumulated high levels of osmoprotectants with increase in the relative water content. The increased photosynthetic activity and enhanced gaseous exchange parameters further confirmed the enhanced tolerance of AsA-GSH overexpression lines. We concluded that pyramiding of AsA-GSH pathway genes is an effective strategy for developing stress resistant crops.
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Affiliation(s)
- Vaseem Raja
- Plant Molecular Biology Laboratory, Department of Botany, University of Kashmir, Srinagar, Kashmir, 190006, India
| | - Umer Majeed Wani
- Plant Molecular Biology Laboratory, Department of Botany, University of Kashmir, Srinagar, Kashmir, 190006, India
- Department of Biotechnology, University of Kashmir, Srinagar, 190006, India
| | - Zubair Ahmad Wani
- Department of Biotechnology, University of Kashmir, Srinagar, 190006, India
| | - Nelofer Jan
- Plant Molecular Biology Laboratory, Department of Botany, University of Kashmir, Srinagar, Kashmir, 190006, India
| | - Chandrasekhar Kottakota
- International Center for Genetic Engineering and Biotechnology (ICGEB), New Delhi, 1100067, India
| | - Malireddy K Reddy
- International Center for Genetic Engineering and Biotechnology (ICGEB), New Delhi, 1100067, India
| | - Tanushri Kaul
- International Center for Genetic Engineering and Biotechnology (ICGEB), New Delhi, 1100067, India
| | - Riffat John
- Plant Molecular Biology Laboratory, Department of Botany, University of Kashmir, Srinagar, Kashmir, 190006, India.
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Zhai J, Qi Q, Wang M, Yan J, Li K, Xu H. Overexpression of tomato thioredoxin h (SlTrxh) enhances excess nitrate stress tolerance in transgenic tobacco interacting with SlPrx protein. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 315:111137. [PMID: 35067307 DOI: 10.1016/j.plantsci.2021.111137] [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: 07/01/2021] [Revised: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
The thioredoxin (Trx) system plays a vital function in cellular antioxidative defense. However, little is known about Trx in tomato under excess nitrate. In this study, we isolated the tomato gene encoding h-type Trx gene (SlTrxh). The mRNA transcript of SlTrxh in roots and leaves of tomato was induced incrementally under excess nitrate for 24 h. Subcellular localization showed that SlTrxh might localize in the cytoplasm, nucleus and plasma membrane. Enzymatic activity characterization revealed that SlTrxh protein possesses the disulfide reductase function and Cysteine (Cys) 54 is important for its activity. Overexpressing SlTrxh in tobacco resulted in increasing seed germination rate, root length and decreasing H2O2 and O2- accumulation, compared with the wild type (WT) tobacco under nitrate stress. While overexpressing SlTrxhC54S (Cysteine 54 mutated to Serine) in tobacco showed decreased germination rate and root length compared with the WT after nitrate treatment. After nitrate stress treatment, SlTrxh overexpressing transgenic tobacco plants have lower malonaldehyde (MDA), H2O2 contents and Reactive Oxygen Species (ROS) accumulation, and higher mRNA transcript level of NtP5CS, NtDREB2, higher ratio of ASA/DHA and GSH/GSSG, higher activities of ascorbate peroxidase and NADP thioredoxin reductase. Besides, SlTrxh overexpressing plants showed higher tolerance to Methyl Viologen (MV) in the seed germination and seedling stage. The yeast two-hybrid, pull-down, Co-immunoprecipitation and Bimolecular luciferase complementation assay confirmed that SlTrxh physically interacted with tomato peroxiredoxin (SlPrx). These results suggest that SlTrxh contributes to maintaining ROS homeostasis under excess nitrate stress interacting with SlPrx and Cys54 is important for its enzyme activity.
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Affiliation(s)
- Jiali Zhai
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China
| | - Qi Qi
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China
| | - Manqi Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China
| | - Jinping Yan
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China
| | - Kunzhi Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China
| | - Huini Xu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Jingming South Street, Kunming, Yunnan, 650224, PR China.
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Li R, Su X, Zhou R, Zhang Y, Wang T. Molecular mechanism of mulberry response to drought stress revealed by complementary transcriptomic and iTRAQ analyses. BMC PLANT BIOLOGY 2022; 22:36. [PMID: 35039015 PMCID: PMC8762937 DOI: 10.1186/s12870-021-03410-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND The use of mulberry leaves has long been limited to raising silkworms, but with the continuous improvement of mulberry (Morus alba) resource development and utilization, various mulberry leaf extension products have emerged. However, the fresh leaves of mulberry trees have a specific window of time for picking and are susceptible to adverse factors, such as drought stress. Therefore, exploring the molecular mechanism by which mulberry trees resist drought stress and clarifying the regulatory network of the mulberry drought response is the focus of the current work. RESULTS In this study, natural and drought-treated mulberry grafted seedlings were used for transcriptomic and proteomic analyses (CK vs. DS9), aiming to clarify the molecular mechanism of the mulberry drought stress response. Through transcriptome and proteome sequencing, we identified 9889 DEGs and 1893 DEPs enriched in stress-responsive GO functional categories, such as signal transducer activity, antioxidant activity, and transcription regulator activity. KEGG enrichment analysis showed that a large number of codifferentially expressed genes were enriched in flavonoid biosynthesis pathways, hormone signalling pathways, lignin metabolism and other pathways. Through subsequent cooperation analysis, we identified 818 codifferentially expressed genes in the CK vs. DS9 comparison group, including peroxidase (POD), superoxide dismutase (SOD), aldehyde dehydrogenase (ALDHs), glutathione s-transferase (GST) and other genes closely related to the stress response. In addition, we determined that the mulberry gene MaWRKYIII8 (XP_010104968.1) underwent drought- and abscisic acid (ABA)-induced expression, indicating that it may play an important role in the mulberry response to drought stress. CONCLUSIONS Our research shows that mulberry can activate proline and ABA biosynthesis pathways and produce a large amount of proline and ABA, which improves the drought resistance of mulberry. MaWRKYIII8 was up-regulated and induced by drought and exogenous ABA, indicating that MaWRKYIII8 may be involved in the mulberry response to drought stress. These studies will help us to analyse the molecular mechanism underlying mulberry drought tolerance and provide important gene information and a theoretical basis for improving mulberry drought tolerance through molecular breeding in the future.
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Affiliation(s)
- Ruixue Li
- Sericultural Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China
| | - Xueqiang Su
- Sericultural Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China
| | - Rong Zhou
- Sericultural Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China
| | - Yuping Zhang
- Sericultural Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China
| | - Taichu Wang
- Sericultural Research Institute, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China.
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Li W, Lee J, Yu S, Wang F, Lv W, Zhang X, Li C, Yang J. Characterization and analysis of the transcriptome response to drought in Larix kaempferi using PacBio full-length cDNA sequencing integrated with de novo RNA-seq reads. PLANTA 2021; 253:28. [PMID: 33423138 DOI: 10.1007/s00425-020-03555-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
A hypothetical model of drought tolerance mechanism of Larix kaempferi was established through SMRT-seq and Illumina HiSeq. Larix kaempferi is an important economic and ecological species and a major afforestation species in north-eastern China. To date, no information has been reliably derived regarding full-length cDNA sequencing information on L. kaempferi. By single-molecule long-read isoform sequencing (SMRT-seq), here we report a total of 26,153,342 subreads (21.24 Gb) and 330,371 circular consensus sequence (CCS) reads after the modification of site mismatch, and 35,414 unigenes were successfully collected. To gain deeper insights into the molecular mechanisms of L. kaempferi response to drought stress, we combined Illumina HiSeq with SMRT-seq to decode full-length transcripts. In this study, we report 27 differentially expressed genes (DEGs) involved in the perception and transmission of drought stress signals in L. kaempferi. A large number of DEGs responding to drought stress were detected in L. kaempferi, especially DEGs involved in the reactive oxygen species (ROS) scavenging, lignin biosynthesis, and sugar metabolism, and DEGs encoding drought stress proteins. We detected 73 transcription factors (TFs) under drought stress, including AP2/ERF, bZIP, TCP, and MYB. This study provides basic full sequence resources for L. kaempferi research and will help us to better understand the functions of drought-resistance genes in L. kaempferi.
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Affiliation(s)
- Wenlong Li
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
| | - Joobin Lee
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
| | - Sen Yu
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
| | - Fude Wang
- Institute of Forestry Science of Heilongjiang Province, 134 Haping Road, Harbin, 150040, China
| | - Wanqiu Lv
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
| | - Xin Zhang
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China
| | - Chenghao Li
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China.
| | - Jingli Yang
- State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China.
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