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Jin Y, Zhang Y, Lin L, Ying S, Yu C. Cucumber PGIP2 is involved in resistance to gray mold disease. Gene 2024; 923:148588. [PMID: 38763363 DOI: 10.1016/j.gene.2024.148588] [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: 01/23/2024] [Revised: 05/09/2024] [Accepted: 05/16/2024] [Indexed: 05/21/2024]
Abstract
Polygalacturonase inhibitor protein (PGIP) restricts fungal growth and colonization and functions in plant immunity. Gray mold in cucumber is a common fungal disease caused by Botrytis cinerea, and is widespread and difficult to control in cucumber (Cucumis sativus L.) production. In this study, Cucumis sativus polygalacturonase-inhibiting protein 2 (CsPGIP2) was found to be upregulated in response to gray mold in cucumber. CsPGIP2 was detected in the endoplasmic reticulum, cell membrane, and cell wall after transient transformation of protoplasts and tobacco. A possible interaction between Botrytis cinerea polygalacturonase 3 (BcPG3) and CsPGIP2 was supported by protein interaction prediction and BiFC analysis. Transgenic Arabidopsis plants expressing CsPGIP2 were constructed and exhibited smaller areas of gray mold infection compared to wild type (WT) plants after simultaneous inoculation. Evans blue dye (EBD) confirmed greater damage for WT plants, with more intense dyeing than for the transgenic Arabidopsis. Interestingly, compared to WT, transgenic Arabidopsis exhibited higher superoxide dismutase (AtSOD1) expression, antioxidant enzyme activities, lignin content, net photosynthetic rate (Pn), and photochemical activity. Our results suggest that CsPGIP2 stimulates a variety of plant defense mechanisms to enhance transgenic Arabidopsis resistance against gray mold disease.
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Affiliation(s)
- Yinhe Jin
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas, College of Horticulture Science, Zhejiang A&F University, Hangzhou 311300, China
| | - Yinan Zhang
- People's Government of Xianliang Town, Qingyuan County, Zhejiang Province 323800, China
| | - Lili Lin
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas, College of Horticulture Science, Zhejiang A&F University, Hangzhou 311300, China
| | - Shupeng Ying
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas, College of Horticulture Science, Zhejiang A&F University, Hangzhou 311300, China
| | - Chao Yu
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas, College of Horticulture Science, Zhejiang A&F University, Hangzhou 311300, China; School of Mathematics and Computer Science, Zhejiang A & F University, Hangzhou 311300, China.
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Gao H, Lin X, Yuan X, Zou J, Zhang H, Zhang Y, Liu Z. The salivary chaperone protein NlDNAJB9 of Nilaparvata lugens activates plant immune responses. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6874-6888. [PMID: 37103882 DOI: 10.1093/jxb/erad154] [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: 02/17/2023] [Accepted: 04/25/2023] [Indexed: 06/19/2023]
Abstract
The brown planthopper (BPH) Nilaparvata lugens (Stål) is a main pest on rice. It secretes saliva to regulate plant defense responses, when penetrating rice plant and sucking phloem sap through its stylet. However, the molecular mechanisms of BPH salivary proteins regulating plant defense responses remain poorly understood. A N. lugens DNAJ protein (NlDNAJB9) gene was highly expressed in salivary glands, and the knock down of NlDNAJB9 significantly enhanced honeydew excretion and fecundity of the BPH. NlDNAJB9 could induce plant cell death, and the overexpression of NlDNAJB9 gene in Nicotiana benthamiana induced calcium signaling, mitogen-activated protein kinase (MAPK) cascades, reactive oxygen species (ROS) accumulation, jasmonic acid (JA) hormone signaling and callose deposition. The results from different NlDNAJB9 deletion mutants indicated that the nuclear localization of NlDNAJB9 was not necessary to induce cell death. The DNAJ domain was the key region to induce cell death, and the overexpression of DNAJ domain in N. benthamiana significantly inhibited insect feeding and pathogenic infection. NlDNAJB9 might interact indirectly with NlHSC70-3 to regulate plant defense responses. NlDNAJB9 and its orthologs were highly conserved in three planthopper species, and could induce ROS burst and cell death in plants. Our study provides new insights into the molecular mechanisms of insect-plant interactions.
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Affiliation(s)
- Haoli Gao
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Xumin Lin
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Xiaowei Yuan
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Jianzheng Zou
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Huihui Zhang
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Yixi Zhang
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
| | - Zewen Liu
- Key laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China
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Song M, Hu N, Zhou S, Xie S, Yang J, Ma W, Teng Z, Liang W, Wang C, Bu M, Zhang S, Yang X, He D. Physiological and RNA-Seq Analyses on Exogenous Strigolactones Alleviating Drought by Improving Antioxidation and Photosynthesis in Wheat ( Triticum aestivum L.). Antioxidants (Basel) 2023; 12:1884. [PMID: 37891963 PMCID: PMC10604895 DOI: 10.3390/antiox12101884] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/10/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Drought poses a significant challenge to global wheat production, and the application of exogenous phytohormones offers a convenient approach to enhancing drought tolerance of wheat. However, little is known about the molecular mechanism by which strigolactones (SLs), newly discovered phytohormones, alleviate drought stress in wheat. Therefore, this study is aimed at elucidating the physiological and molecular mechanisms operating in wheat and gaining insights into the specific role of SLs in ameliorating responses to the stress. The results showed that SLs application upregulated the expression of genes associated with the antioxidant defense system (Fe/Mn-SOD, PER1, PER22, SPC4, CAT2, APX1, APX7, GSTU6, GST4, GOR, GRXC1, and GRXC15), chlorophyll biogenesis (CHLH, and CPX), light-harvesting chlorophyll A-B binding proteins (WHAB1.6, and LHC Ib-21), electron transfer (PNSL2), E3 ubiquitin-protein ligase (BB, CHIP, and RHY1A), heat stress transcription factor (HSFA1, HSFA4D, and HSFC2B), heat shock proteins (HSP23.2, HSP16.9A, HSP17.9A, HSP21, HSP70, HSP70-16, HSP70-17, HSP70-8, HSP90-5, and HSP90-6), DnaJ family members (ATJ1, ATJ3, and DJA6), as well as other chaperones (BAG1, CIP73, CIPB1, and CPN60I). but the expression level of genes involved in chlorophyll degradation (SGR, NOL, PPH, PAO, TIC55, and PTC52) as well as photorespiration (AGT2) was found to be downregulated by SLs priming. As a result, the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were enhanced, and chlorophyll content and photosynthetic rate were increased, which indicated the alleviation of drought stress in wheat. These findings demonstrated that SLs alleviate drought stress by promoting photosynthesis through enhancing chlorophyll levels, and by facilitating ROS scavenging through modulation of the antioxidant system. The study advances understandings of the molecular mechanism underlying SLs-mediated drought alleviation and provides valuable insights for implementing sustainable farming practice under water restriction.
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Affiliation(s)
- Miao Song
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
- Collaborative Innovation Center of Henan Grain Crops, Zhengzhou 450046, China
| | - Naiyue Hu
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Sumei Zhou
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
- Collaborative Innovation Center of Henan Grain Crops, Zhengzhou 450046, China
| | - Songxin Xie
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Jian Yang
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Wenqi Ma
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Zhengkai Teng
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Wenxian Liang
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Chunyan Wang
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Mingna Bu
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Shuo Zhang
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
| | - Xiwen Yang
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
- Collaborative Innovation Center of Henan Grain Crops, Zhengzhou 450046, China
| | - Dexian He
- College of Agronomy, Henan Agricultural University, Zhengzhou 450046, China; (M.S.); (N.H.); (S.Z.); (S.X.); (J.Y.); (W.M.); (Z.T.); (W.L.); (C.W.); (M.B.); (S.Z.)
- Co-Construction State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046, China
- Collaborative Innovation Center of Henan Grain Crops, Zhengzhou 450046, China
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Gautam R, Meena RK, Rampuria S, Shukla P, Kirti PB. Ectopic expression of DnaJ type-I protein homolog of Vigna aconitifolia ( VaDJI) confers ABA insensitivity and multiple stress tolerance in transgenic tobacco plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1135552. [PMID: 37152162 PMCID: PMC10154610 DOI: 10.3389/fpls.2023.1135552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 03/31/2023] [Indexed: 05/09/2023]
Abstract
Reduced crop productivity results from altered plant physiological processes caused by dysfunctional proteins due to environmental stressors. In this study, a novel DnaJ Type-I encoding gene, VaDJI having a zinc finger motif in its C-terminal domain was found to be induced early upon treatment with heat stress (within 5 min) in a heat tolerant genotype of Vigna aconitifolia RMO-40. VaDJI is induced by multiple stresses. In tobacco, ectopic expression of VaDJI reduced ABA sensitivity during seed germination and the early stages of seedling growth of transgenic tobacco plants. Concomitantly, it also improved the ability of transgenic tobacco plants to withstand drought stress by modulating the photosynthetic efficiency, with the transgenic plants having higher Fv/Fm ratios and reduced growth inhibition. Additionally, transgenic plants showed a reduced build-up of H2O2 and lower MDA levels and higher chlorophyll content during drought stress, which attenuated cell damage and reduced oxidative damage. An analysis using the qRT-PCR study demonstrated that VaDJI overexpression is associated with the expression of some ROS-detoxification-related genes and stress-marker genes that are often induced during drought stress responses. These findings suggest a hypothesis whereby VaDJI positively influences drought stress tolerance and ABA signalling in transgenic tobacco, and suggests that it is a potential gene for genetic improvement of drought and heat stress tolerance in crop plants.
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Affiliation(s)
- Ranjana Gautam
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
- Department of Life Sciences and Biotechnology, Chhatrapati Shahu Ji Maharaj University, Kanpur, Uttar Pradesh, India
- *Correspondence: Ranjana Gautam, ; P. B. Kirti,
| | - Rajesh Kumar Meena
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Sakshi Rampuria
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Pawan Shukla
- Seri-Biotech Research Laboratory, Central Silk Board, Bangalore, India
| | - P. B. Kirti
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
- *Correspondence: Ranjana Gautam, ; P. B. Kirti,
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Khodaeiaminjan M, Knoch D, Ndella Thiaw MR, Marchetti CF, Kořínková N, Techer A, Nguyen TD, Chu J, Bertholomey V, Doridant I, Gantet P, Graner A, Neumann K, Bergougnoux V. Genome-wide association study in two-row spring barley landraces identifies QTL associated with plantlets root system architecture traits in well-watered and osmotic stress conditions. FRONTIERS IN PLANT SCIENCE 2023; 14:1125672. [PMID: 37077626 PMCID: PMC10106628 DOI: 10.3389/fpls.2023.1125672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/15/2023] [Indexed: 05/03/2023]
Abstract
Water availability is undoubtedly one of the most important environmental factors affecting crop production. Drought causes a gradual deprivation of water in the soil from top to deep layers and can occur at diverse stages of plant development. Roots are the first organs that perceive water deficit in soil and their adaptive development contributes to drought adaptation. Domestication has contributed to a bottleneck in genetic diversity. Wild species or landraces represent a pool of genetic diversity that has not been exploited yet in breeding program. In this study, we used a collection of 230 two-row spring barley landraces to detect phenotypic variation in root system plasticity in response to drought and to identify new quantitative trait loci (QTL) involved in root system architecture under diverse growth conditions. For this purpose, young seedlings grown for 21 days in pouches under control and osmotic-stress conditions were phenotyped and genotyped using the barley 50k iSelect SNP array, and genome-wide association studies (GWAS) were conducted using three different GWAS methods (MLM GAPIT, FarmCPU, and BLINK) to detect genotype/phenotype associations. In total, 276 significant marker-trait associations (MTAs; p-value (FDR)< 0.05) were identified for root (14 and 12 traits under osmotic-stress and control conditions, respectively) and for three shoot traits under both conditions. In total, 52 QTL (multi-trait or identified by at least two different GWAS approaches) were investigated to identify genes representing promising candidates with a role in root development and adaptation to drought stress.
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Affiliation(s)
- Mortaza Khodaeiaminjan
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
- *Correspondence: Mortaza Khodaeiaminjan, ; Véronique Bergougnoux,
| | - Dominic Knoch
- Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | - Cintia F. Marchetti
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
| | - Nikola Kořínková
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
| | - Alexie Techer
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
| | - Thu D. Nguyen
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
| | - Jianting Chu
- Department of Breeding Research, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Valentin Bertholomey
- Limagrain Field Seeds, Traits and Technologies, Groupe Limagrain Centre de Recherche, Chappes, France
| | - Ingrid Doridant
- Limagrain Field Seeds, Traits and Technologies, Groupe Limagrain Centre de Recherche, Chappes, France
| | - Pascal Gantet
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
- Unité Mixte de Recherche DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France
| | - Andreas Graner
- Department Genebank, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Kerstin Neumann
- Department of Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Véronique Bergougnoux
- Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Olomouc, Czechia
- *Correspondence: Mortaza Khodaeiaminjan, ; Véronique Bergougnoux,
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Cai G, Xu Y, Zhang S, Chen T, Liu G, Li Z, Zhu Y, Wang G. A tomato chloroplast-targeted DnaJ protein, SlDnaJ20 maintains the stability of photosystem I/II under chilling stress. PLANT SIGNALING & BEHAVIOR 2022; 17:2139116. [PMID: 36408837 PMCID: PMC9683050 DOI: 10.1080/15592324.2022.2139116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
DnaJ proteins are key molecular chaperones that act as a part of the stress response to stabilize plant proteins, thereby maintaining protein homeostasis under stressful conditions. Herein we used transgenic plants to explore the role of the tomato (Solanum lycopersicum) SlDnaJ20 chloroplast DnaJ protein in to the resistance of these proteins to cold. When chilled, transgenic plants exhibited superior cold resistance, with reduced growth inhibition and cellular damage and increased fresh mass and chlorophyll content relative to control. These transgenic plants further exhibited increased Fv/Fm, P700 oxidation, φRo, and δRo relative to control plants under chilling conditions. Under these same cold conditions, these transgenic plants also exhibited higher levels of core proteins in the photosystem I (PSI) and II (PSII) complexes (PsaA and PsaB; D1 and D2) relative to control wild-type plants. Together these results suggested that the overexpression of SlDnaJ20 is sufficient to maintain PSI and PSII complex stability and to alleviate associated photoinhibition of these complexes, thereby increasing transgenic plant resistance to cold stress.
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Affiliation(s)
- Guohua Cai
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Yujie Xu
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Shuxia Zhang
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Tingting Chen
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Gan Liu
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Zhengyue Li
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Youshuang Zhu
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
| | - Guodong Wang
- School of Biological Sciences, Jining Medical University, Ri’zhao, 276800, P.R. China
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Pongprayoon W, Panya A, Jaresitthikunchai J, Phaonakrop N, Roytrakul S. Phosphoprotein Profile of Rice ( Oryza sativa L.) Seedlings under Osmotic Stress after Pretreatment with Chitosan. PLANTS (BASEL, SWITZERLAND) 2022; 11:2729. [PMID: 36297750 PMCID: PMC9611960 DOI: 10.3390/plants11202729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
This study aims to identify novel chitosan (CTS)-responsive phosphoproteins in Leung Pratew 123 (LPT123) and Khao Dawk Mali 105 (KDML105) as drought-sensitive rice cultivars and differences in the CTS response. Rice seeds were soaked in CTS solution before germination, and 2- and 4-week-old rice seedlings sprayed with CTS before osmotic stress comprised the following four groups: (1) seedlings treated with distilled water; (2) seedlings treated with CTS; (3) seedlings pretreated with distilled water and subjected to osmotic stress; and (4) seedlings pretreated with CTS and subjected to osmotic stress. Phosphoproteins of leaf tissues were enriched using immobilized metal affinity chromatography (IMAC) before tryptic digestion and analysis via LC-MS. Phosphoprotein profiling analyses led to the identification of 4721 phosphoproteins representing 1052 and 1040 unique phosphoproteins in the LPT123 and KDML105 seedlings, respectively. In response to CTS pretreatment before osmotic stress, 22 differently expressed proteins were discovered, of which 10 and 12 were identified in the LPT123 and KDML105, respectively. These proteins are typically involved in signaling, transport, protein folding, protein degradation, and metabolism. This study provides fruitful data to understand the signal transduction mechanisms of rice seedlings pretreated with CTS before exposure to osmotic stress.
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Affiliation(s)
- Wasinee Pongprayoon
- Department of Biology, Faculty of Science, Burapha University, 169 Longhaad Bangsaen Rd, Saensook, Mueang, Chonburi 20131, Thailand
| | - Atikorn Panya
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phaholyothin Rd., Klong Luang, Pathum Thani 12120, Thailand
| | - Janthima Jaresitthikunchai
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phaholyothin Rd., Klong Luang, Pathum Thani 12120, Thailand
| | - Narumon Phaonakrop
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phaholyothin Rd., Klong Luang, Pathum Thani 12120, Thailand
| | - Sittiruk Roytrakul
- Functional Ingredients and Food Innovation Research Group, National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phaholyothin Rd., Klong Luang, Pathum Thani 12120, Thailand
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Jiao Q, Zhang M, Zada A, Hu X, Jia T. DJC78 is a cochaperone that interacts with cpHsc70-1 in the chloroplasts. Biochem Biophys Res Commun 2022; 626:236-242. [DOI: 10.1016/j.bbrc.2022.07.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 07/20/2022] [Indexed: 11/26/2022]
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9
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Kundrátová K, Bartas M, Pečinka P, Hejna O, Rychlá A, Čurn V, Červeň J. Transcriptomic and Proteomic Analysis of Drought Stress Response in Opium Poppy Plants during the First Week of Germination. PLANTS 2021; 10:plants10091878. [PMID: 34579414 PMCID: PMC8465278 DOI: 10.3390/plants10091878] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/30/2021] [Accepted: 09/08/2021] [Indexed: 11/16/2022]
Abstract
Water deficiency is one of the most significant abiotic stresses that negatively affects growth and reduces crop yields worldwide. Most research is focused on model plants and/or crops which are most agriculturally important. In this research, drought stress was applied to two drought stress contrasting varieties of Papaver somniferum (the opium poppy), a non-model plant species, during the first week of its germination, which differ in responses to drought stress. After sowing, the poppy seedlings were immediately subjected to drought stress for 7 days. We conducted a large-scale transcriptomic and proteomic analysis for drought stress response. At first, we found that the transcriptomic and proteomic profiles significantly differ. However, the most significant findings are the identification of key genes and proteins with significantly different expressions relating to drought stress, e.g., the heat-shock protein family, dehydration responsive element-binding transcription factors, ubiquitin E3 ligase, and others. In addition, metabolic pathway analysis showed that these genes and proteins were part of several biosynthetic pathways most significantly related to photosynthetic processes, and oxidative stress responses. A future study will focus on a detailed analysis of key genes and the development of selection markers for the determination of drought-resistant varieties and the breeding of new resistant lineages.
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Affiliation(s)
- Kristýna Kundrátová
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic; (K.K.); (M.B.); (P.P.)
| | - Martin Bartas
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic; (K.K.); (M.B.); (P.P.)
| | - Petr Pečinka
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic; (K.K.); (M.B.); (P.P.)
| | - Ondřej Hejna
- Department of Genetics and Agricultural Biotechnology, Faculty of Agriculture, University of South Bohemia, Studentská 1668, 370 05 České Budějovice, Czech Republic;
| | - Andrea Rychlá
- Research Institute of Oilseed Crops, OSEVA PRO. Ltd., Purkyňova 10, 764 01 Opava, Czech Republic;
| | - Vladislav Čurn
- Department of Genetics and Agricultural Biotechnology, Faculty of Agriculture, University of South Bohemia, Studentská 1668, 370 05 České Budějovice, Czech Republic;
- Correspondence: (V.Č.); (J.Č.)
| | - Jiří Červeň
- Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Ostrava, Czech Republic; (K.K.); (M.B.); (P.P.)
- Correspondence: (V.Č.); (J.Č.)
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10
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Khan R, Ma X, Zhang J, Wu X, Iqbal A, Wu Y, Zhou L, Wang S. Circular drought-hardening confers drought tolerance via modulation of the antioxidant defense system, osmoregulation, and gene expression in tobacco. PHYSIOLOGIA PLANTARUM 2021; 172:1073-1088. [PMID: 33755204 DOI: 10.1111/ppl.13402] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 03/14/2021] [Accepted: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Drought stress hinders the growth and development of crop plants and ultimately its productivity. It is expected that drought stress will be frequent and intense in the future due to drastic changes in the global climate. It is necessary to make crop plants more resilient to drought stress through various techniques; drought-hardening is one of them. Defining various metabolic strategies used by tobacco plants to confer drought tolerance will be important for maintaining plant physiological functions, but studies addressing this topic are limited. This study was designed to elucidate the drought tolerance and adaptation strategies used by tobacco plants via the application of different circular drought-hardening cycles (control: no drought-hardening, T1: one cycle of drought hardening, T2: two cycles of drought-hardening, and T3: three cycles of drought-hardening) to two tobacco varieties namely Honghuadajinyuan (H) and Yun Yan-100 (Y). The results revealed that drought-hardening decreased the fresh and dry biomass of the tobacco plants. The decrease was more pronounced in the T3 treatment for both H (23 and 29%, respectively) and Y (26 and 31%, respectively) under drought stress. The MDA contents, especially in T1 and T2 in both varieties, were statistically similar compared with control under drought stress. Similarly, higher POD, APX, and GR activities were observed, especially in T3, and elevated amounts of AsA and GSH were also observed among the different circular drought-hardening treatments under drought stress. Thus circular drought-hardening mitigated the oxidative damage by increasing the antioxidant enzyme activities and elevated the content of antioxidant substances, a key metabolic strategy under drought stress. Similarly, another important plant metabolic strategy is the osmotic adjustment. Different circular drought-hardening treatments improved the accumulation of proline and soluble sugars contents which contributed to osmoregulation. Finally, at the molecular level, circular drought-hardening improved the transcript levels of antioxidant enzyme-related genes (CAT, APX1, and GR2), proline and polyamines biosynthesis-related genes (P5CS1 and ADC2), and ABA signaling (SnRK2), and transcription factors (AREB1 and WRKY6) in response to drought stress. As a result, circular drought-hardening (T2 and T3 treatments) promoted tolerance to water stress via affecting the anti-oxidative capacity, osmotic adjustment, and regulation of gene expression in tobacco.
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Affiliation(s)
- Rayyan Khan
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xinghua Ma
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
| | - Juan Zhang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaoying Wu
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Anas Iqbal
- Key Laboratory of Crop Cultivation and Farming System, College of Agriculture, Guangxi University, Nanning, China
| | - Yuanhua Wu
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
| | - Lei Zhou
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shusheng Wang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao, China
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DnaJs, the critical drivers of Hsp70s: genome-wide screening, characterization and expression of DnaJ family genes in Sorghum bicolor. Mol Biol Rep 2020; 47:7379-7390. [PMID: 32880065 DOI: 10.1007/s11033-020-05793-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/28/2020] [Indexed: 01/09/2023]
Abstract
The DnaJ/Hsp40s, are important components in the chaperone machine, and play pivotal roles in plant growth, development and stress tolerance. Sorghum, the semi-arid crop, is the drought resilient, model C4 crop. However, no reports of DnaJs have been available. Genome-wide analysis of Sorghum bicolor revealed 113 DnaJ/Hsp40 genes, classified into four groups; 8 genes in SbDnaJ-A class, 10 in SbDnaJ-B, 82 in SbDnaJ-C and 13 in SbDnaJ-D distributed unevenly on all the 10 chromosomes. Chromosomes 1 and 3 were found hot spots with 22 and 20 genes respectively. All genes displayed large number of introns, with an exception of 11 of the SbDnaJ-C which is devoid of introns. Out of 36 paralogous duplications, 7 tandem and 29 segmental duplications were noticed, indicating the major role of segmental duplications in the expansion. Analysis of digital data revealed tissue and stage-specific expressions. Transcriptional profiling of 12 selected genes representing all 4 classes revealed highly significant expression in leaf followed by root tissues. No expression was noticed in stems with an exception of SbDnaJ-C76. The SbDnaJ-A1, D1, and C subgroup genes displayed upregulation in roots, stems and leaves under cold, inferring the involvement of Hsp40s for cellular protection during cold stress. The results demonstrate that C76 and D1 are the candidate genes associated with multiple abiotic stresses. Present research furnishes valuable information about the role of sorghum DnaJs in abiotic stress response and establishes a foundation for understanding the molecular mechanisms associated with plant development and stress tolerance.
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12
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Wang G, Li M, Cheng H, Zhang C, Deng W, Li T. Expression profiling of Cordyceps DnaJ protein family in Tolypocladium guangdongense during developmental and temperature stress processes. Gene 2020; 743:144563. [PMID: 32165290 DOI: 10.1016/j.gene.2020.144563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/08/2020] [Indexed: 11/15/2022]
Abstract
DnaJ is an important molecular chaperone, with significant roles in growth, development, and stress resistance. Studies on the DnaJ gene family in macro-fungi such as Cordyceps spp. s.l. is scare. In this study, 22, 20, and 24 putative DnaJ genes were identified in Tolypocladium guangdongense, Ophiocordyceps sinensis, and C. militaris, respectively. They were classified into four groups based on the presence of the J, zinc finger, and C-terminal domains. We mainly studied the T. guangdongense DnaJ genes being located in the endoplasmic reticulum, cytoplasm, mitochondrion, and nucleus. Phylogenetic analysis revealed gene duplications during the evolutionary process. Multiple cis-elements and transcription factor binding sites were observed in the promoter, suggesting their involvement in the response to multiple stresses. qRT-PCR analysis showed that 63.63% and 45.45% of T. guangdongense DnaJ genes were differentially expressed under cold and heat stress, respectively, indicating their involvement in the response to temperature stress. Many T. guangdongense DnaJ genes in the primordium and fruiting body exhibited differential expression, in comparison to those in the mycelium, suggesting a regulatory role in its growth and development process. These findings will facilitate further functional analysis, and provide information on the classification and conservative functions of DnaJ proteins in macro-fungi.
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Affiliation(s)
- Gangzheng Wang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Min Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; College of Agriculture and Animal Husbandry, Tibet University, Nyingchi 860000, Tibet, China
| | - Huijiao Cheng
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; South China Agricultural University, Guangzhou 510642, China
| | - Chenghua Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Wangqiu Deng
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China.
| | - Taihui Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China.
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Verma AK, Tamadaddi C, Tak Y, Lal SS, Cole SJ, Hines JK, Sahi C. The expanding world of plant J-domain proteins. CRITICAL REVIEWS IN PLANT SCIENCES 2019; 38:382-400. [PMID: 33223602 PMCID: PMC7678915 DOI: 10.1080/07352689.2019.1693716] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Plants maintain cellular proteostasis during different phases of growth and development despite a barrage of biotic and abiotic stressors in an ever-changing environment. This requires a collaborative effort of a cadre of molecular chaperones. Hsp70s and their obligate co-chaperones, J-domain proteins (JDPs), are arguably the most ubiquitous and formidable components of the cellular chaperone network, facilitating numerous and diverse cellular processes and allowing survival under a plethora of stressful conditions. JDPs are also among the most versatile chaperones. Compared to Hsp70s, the number of JDP-encoding genes has proliferated, suggesting the emergence of highly complex Hsp70-JDP networks, particularly in plants. Recent studies indicate that besides the increase in the number of JDP encoding genes; regulatory differences, neo- and sub-functionalization, and inter- and intra-class combinatorial interactions, is rapidly expanding the repertoire of Hsp70-JDP systems. This results in highly robust and functionally diverse chaperone networks in plants. Here, we review the current status of plant JDP research and discuss how the paradigm shift in the field can be exploited toward a better understanding of JDP function and evolution.
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Affiliation(s)
- Amit K. Verma
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Chetana Tamadaddi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Yogesh Tak
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Silviya S. Lal
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Sierra J. Cole
- Department of Chemistry, Lafayette College, Easton, PA, USA
| | | | - Chandan Sahi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
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Elucidating Drought Stress Tolerance in European Oaks Through Cross-Species Transcriptomics. G3-GENES GENOMES GENETICS 2019; 9:3181-3199. [PMID: 31395652 PMCID: PMC6778798 DOI: 10.1534/g3.119.400456] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The impact of climate change that comes with a dramatic increase of long periods of extreme summer drought associated with heat is a fundamental challenge for European forests. As a result, forests are expected to shift their distribution patterns toward north-east, which may lead to a dramatic loss in value of European forest land. Consequently, unraveling key processes that underlie drought stress tolerance is not only of great scientific but also of utmost economic importance for forests to withstand future heat and drought wave scenarios. To reveal drought stress-related molecular patterns we applied cross-species comparative transcriptomics of three major European oak species: the less tolerant deciduous pedunculate oak (Quercus robur), the deciduous but quite tolerant pubescent oak (Q. pubescens), and the very tolerant evergreen holm oak (Q. ilex). We found 415, 79, and 222 differentially expressed genes during drought stress in Q. robur, Q. pubescens, and Q. ilex, respectively, indicating species-specific response mechanisms. Further, by comparative orthologous gene family analysis, 517 orthologous genes could be characterized that may play an important role in drought stress adaptation on the genus level. New regulatory candidate pathways and genes in the context of drought stress response were identified, highlighting the importance of the antioxidant capacity, the mitochondrial respiration machinery, the lignification of the water transport system, and the suppression of drought-induced senescence - providing a valuable knowledge base that could be integrated in breeding programs in the face of climate change.
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15
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Luo Y, Fang B, Wang W, Yang Y, Rao L, Zhang C. Genome-wide analysis of the rice J-protein family: identification, genomic organization, and expression profiles under multiple stresses. 3 Biotech 2019; 9:358. [PMID: 31544012 PMCID: PMC6730974 DOI: 10.1007/s13205-019-1880-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 08/20/2019] [Indexed: 12/17/2022] Open
Abstract
J-proteins which function as molecular chaperone played critical roles in plant growth, development, and response to various environment stresses, but little was reported on this gene family in rice. Here, we identified 115 putative rice J-proteins and classified them into nine major clades (I–IX) according to their phylogenetic relationships. Gene-structure analysis revealed that each member of the same clade has same or similar exon–intron structure, and most rice J-protein genes of clade VII were intronless. Chromosomes mapping suggested that tandem duplication was occurred in evolution. Expression profile showed that the 61 rice J-protein genes were expressed in at least one tissue. The result implied that they could be involved in the process of rice growth and development. The RNA-sequencing data identified 96 differentially expressed genes, 59.38% (57/96), 67.71% (65/96), and 62.50% (60/96) genes were induced by heat stress, drought stress, and salt stress, respectively. The results indicated that J-protein genes could participated in rice response to different stresses. The findings in this study would provide a foundation for further analyzing the function of J-proteins in rice.
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Affiliation(s)
- Ying Luo
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410125 Changsha, China
- College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou, China
| | - Baohua Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410125 Changsha, China
- Key Laboratory of Indica Rice Genetics and Breeding in the Middle and Lower Reaches of Yangtze River Valley, Ministry of Agriculture, 410125 Changsha, China
| | - Weiping Wang
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, 410125 Changsha, China
| | - Ying Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410125 Changsha, China
| | - Liqun Rao
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410125 Changsha, China
| | - Chao Zhang
- College of Bioscience and Biotechnology, Hunan Agricultural University, 410125 Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, 410125 Changsha, China
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16
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Upadhyay A, Gaonkar T, Upadhyay AK, Jogaiah S, Shinde MP, Kadoo NY, Gupta VS. Global transcriptome analysis of grapevine (Vitis vinifera L.) leaves under salt stress reveals differential response at early and late stages of stress in table grape cv. Thompson Seedless. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 129:168-179. [PMID: 29885601 DOI: 10.1016/j.plaphy.2018.05.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/30/2018] [Accepted: 05/30/2018] [Indexed: 05/08/2023]
Abstract
Among the different abiotic stresses, salt stress has a significant effect on the growth and yield of grapevine (Vitis vinifera L.). In this study, we employed RNA sequence based transcriptome analysis to study salinity stress response in grape variety Thompson Seedless. Salt stress adversely affected the growth related and physiological parameters and the effect on physiological parameters was significant within 10 days of stress imposition. A total of 343 genes were differentially expressed in response to salt stress. Among the differentially expressed genes (DEGs) only 42 genes were common at early and late stages of stress. The gene enrichment analysis revealed that GO terms related to transcription factors were over-represented. Among the DEGs, 52 were transcription factors belonging to WRKY, EREB, MYB, NAC and bHLH families. Salt stress significantly affected several pathways like metabolic pathways, biosynthesis of secondary metabolites, membrane transport development related pathways etc. 343 DEGs were distributed on all the 19 chromosomes, however clustered regions of DEGs were present on chromosomes 2, 5, 6 and 12 suggesting probable QTLs for imparting tolerance to salt and other abiotic stresses. Real-time PCR of selected genes in control and treated samples of grafted and own root vines demonstrated that rootstock influenced expression of salt stress responsive genes. Microsatellite regions were identified in ten selected salt responsive genes and highly polymorphic markers were identified using fifteen grape genotypes. This information will be useful for the identification of key genes involved in salt stress tolerance in grape. The identified DEGs could also be useful for genome wide analysis for the identification of polymorphic markers for their subsequent use in molecular breeding for developing salt tolerant grape genotypes.
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Affiliation(s)
- Anuradha Upadhyay
- ICAR-National Research Centre for Grapes, Manjari Farm Post, Solapur Road, Pune, Maharashtra, India.
| | - Tulsi Gaonkar
- ICAR-National Research Centre for Grapes, Manjari Farm Post, Solapur Road, Pune, Maharashtra, India
| | - Ajay Kumar Upadhyay
- ICAR-National Research Centre for Grapes, Manjari Farm Post, Solapur Road, Pune, Maharashtra, India
| | - Satisha Jogaiah
- ICAR-National Research Centre for Grapes, Manjari Farm Post, Solapur Road, Pune, Maharashtra, India
| | - Manisha P Shinde
- ICAR-National Research Centre for Grapes, Manjari Farm Post, Solapur Road, Pune, Maharashtra, India
| | - Narendra Y Kadoo
- CSIR - National Chemical Laboratory, Pashan, Pune, Maharashtra, India
| | - Vidya S Gupta
- CSIR - National Chemical Laboratory, Pashan, Pune, Maharashtra, India
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Wang G, Zhou S, Luo Y, Ma C, Gong Y, Zhou Y, Gao S, Huang Z, Yan L, Hu Y, Bian Y. The heat shock protein 40 LeDnaJ regulates stress resistance and indole-3-acetic acid biosynthesis in Lentinula edodes. Fungal Genet Biol 2018; 118:37-44. [PMID: 30003956 DOI: 10.1016/j.fgb.2018.07.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/22/2022]
Abstract
DnaJ proteins, termed heat shock proteins based on their molecular weight, function as molecular chaperones that play critical roles in regulating organism growth and development as well as adaptation to the environment. However, little has been reported on their gene function in higher basidiomycetes. Here, the heat shock protein 40 (LeDnaJ) gene was cloned and characterized from Lentinula edodes. RNA interference was used to explore the function of LeDnaJ in response to heat stress and Trichoderma atroviride. Integration of the target gene into the L. edodes genome was confirmed by Southern blot analysis, and the silence efficiency of LeDnaJ was analyzed by qRT-PCR. The results revealed that LeDnaJ silence caused defects in mycelial growth and resistance to heat stress and T. atroviride, but increased the mycelial density compared with the wild type (WT) strain S606. Additionally, the IAA content showed a more than 10-fold increase in the WT after heat stress, but an about two-fold increase in the two LeDnaJ RNAi transfortants (LeDnaJ-i-6 and LeDnaJ-i-8). Previous study has shown that enhanced IAA (indole-3-acetic acid) content enhanced the thermotolerance of the heat-sensitive strain YS3357. In this study, it was documented that IAA amendments could partly restore the resistance to T. atroviride and thermotolerance of the two LeDnaJ RNAi transformants. Overall, LeDnaJ is nvolved in fungal growth, T. atroviride resistance, and thermotolerance by regulating the IAA biosynthesis in L. edodes.
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Affiliation(s)
- Gangzheng Wang
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - ShaSha Zhou
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yi Luo
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Chaojun Ma
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yuhua Gong
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yan Zhou
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Shuangshuang Gao
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Zhicheng Huang
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Lianlian Yan
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yue Hu
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yinbing Bian
- Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Key Laboratory of Agro-Microbial Resource Comprehensive Utilization, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei, China.
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Zhang B, Qiu HL, Qu DH, Ruan Y, Chen DH. Phylogeny-dominant classification of J-proteins in Arabidopsis thaliana and Brassica oleracea. Genome 2018; 61:405-415. [PMID: 29620479 DOI: 10.1139/gen-2017-0206] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hsp40s or DnaJ/J-proteins are evolutionarily conserved in all organisms as co-chaperones of molecular chaperone HSP70s that mainly participate in maintaining cellular protein homeostasis, such as protein folding, assembly, stabilization, and translocation under normal conditions as well as refolding and degradation under environmental stresses. It has been reported that Arabidopsis J-proteins are classified into four classes (types A-D) according to domain organization, but their phylogenetic relationships are unknown. Here, we identified 129 J-proteins in the world-wide popular vegetable Brassica oleracea, a close relative of the model plant Arabidopsis, and also revised the information of Arabidopsis J-proteins based on the latest online bioresources. According to phylogenetic analysis with domain organization and gene structure as references, the J-proteins from Arabidopsis and B. oleracea were classified into 15 main clades (I-XV) separated by a number of undefined small branches with remote relationship. Based on the number of members, they respectively belong to multigene clades, oligo-gene clades, and mono-gene clades. The J-protein genes from different clades may function together or separately to constitute a complicated regulatory network. This study provides a constructive viewpoint for J-protein classification and an informative platform for further functional dissection and resistant genes discovery related to genetic improvement of crop plants.
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Affiliation(s)
- Bin Zhang
- a Key Laboratory of Education, Department of Hunan Province on Plant Genetics and Molecular Biology, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Han-Lin Qiu
- b State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, Zhejiang 311300, China
| | - Dong-Hai Qu
- a Key Laboratory of Education, Department of Hunan Province on Plant Genetics and Molecular Biology, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Ying Ruan
- a Key Laboratory of Education, Department of Hunan Province on Plant Genetics and Molecular Biology, College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Dong-Hong Chen
- b State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, Zhejiang 311300, China
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19
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Zhong X, Yang J, Shi Y, Wang X, Wang G. The DnaJ protein OsDjA6 negatively regulates rice innate immunity to the blast fungus Magnaporthe oryzae. MOLECULAR PLANT PATHOLOGY 2018; 19:607-614. [PMID: 28220688 PMCID: PMC6638105 DOI: 10.1111/mpp.12546] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 02/13/2017] [Accepted: 02/17/2017] [Indexed: 05/22/2023]
Abstract
Rice blast, caused by Magnaporthe oryzae (synonym: Pyricularia oryzae), severely reduces rice production and grain quality. The molecular mechanism of rice resistance to M. oryzae is not fully understood. In this study, we identified a chaperone DnaJ protein, OsDjA6, which is involved in basal resistance to M. oryzae in rice. The OsDjA6 protein is distributed in the entire rice cell. The expression of OsDjA6 is significantly induced in rice after infection with a compatible isolate. Silencing of OsDjA6 in transgenic rice enhances resistance to M. oryzae and also results in an increased burst of reactive oxygen species after flg22 and chitin treatments. In addition, the expression levels of WRKY45, NPR1 and PR5 are increased in OsDjA6 RNAi plants, indicating that OsDjA6 may mediate resistance by affecting the salicylic acid pathway. Finally, we found that OsDjA6 interacts directly with the E3 ligase OsZFP1 in vitro and in vivo. These results suggest that the DnaJ protein OsDjA6 negatively regulates rice innate immunity, probably via the ubiquitination proteasome degradation pathway.
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Affiliation(s)
- Xionghui Zhong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China
| | - Jiuxia Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China
| | - Yanlong Shi
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China
| | - Xuli Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China
| | - Guo‐Liang Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China
- Department of Plant PathologyOhio State UniversityColumbusOH43210USA
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20
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Lopes KL, Rodrigues RAO, Silva MC, Braga WGS, Silva-Filho MC. The Zinc-Finger Thylakoid-Membrane Protein FIP Is Involved With Abiotic Stress Response in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2018; 9:504. [PMID: 29720990 PMCID: PMC5915565 DOI: 10.3389/fpls.2018.00504] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 04/03/2018] [Indexed: 05/15/2023]
Abstract
Many plant genes have their expression modulated by stress conditions. Here, we used Arabidopsis FtsH5 protease, which expression is regulated by light stress, as bait in a yeast two-hybrid screen to search for new proteins involved in the stress response. As a result, we found FIP (FtsH5 Interacting Protein), which possesses an amino proximal cleavable transit peptide, a hydrophobic membrane-anchoring region, and a carboxyl proximal C4-type zinc-finger domain. In vivo experiments using FIP fused to green fluorescent protein (GFP) showed a plastid localization. This finding was corroborated by chloroplast import assays that showed FIP inserted in the thylakoid membrane. FIP expression was down-regulated in plants exposed to high light intensity, oxidative, salt, and osmotic stresses, whereas mutant plants expressing low levels of FIP were more tolerant to these abiotic stresses. Our data shows a new thylakoid-membrane protein involved with abiotic stress response in Arabidopsis thaliana.
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21
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Fan F, Yang X, Cheng Y, Kang Y, Chai X. The DnaJ Gene Family in Pepper ( Capsicum annuum L.): Comprehensive Identification, Characterization and Expression Profiles. FRONTIERS IN PLANT SCIENCE 2017; 8:689. [PMID: 28507559 PMCID: PMC5410566 DOI: 10.3389/fpls.2017.00689] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 04/13/2017] [Indexed: 05/24/2023]
Abstract
The DnaJ proteins which function as molecular chaperone played critical roles in plant growth and development and response to heat stress (HS) and also called heat shock protein 40 based on molecular weight. However, little was reported on this gene family in pepper. Recently, the release of the whole pepper genome provided an opportunity for identifying putative DnaJ homologous. In this study, a total of 76 putative pepper DnaJ genes (CaDnaJ01 to CaDnaJ76) were identified using bioinformatics methods and classified into five groups by the presence of the complete three domains (J-domain, zinc finger domain, and C-terminal domain). Chromosome mapping suggested that segmental duplication and tandem duplication were occurred in evolution. The multiple stress-related cis-elements were found in the promoter region of these CaDnaJ genes, which indicated that the CaDnaJs might be involved in the process of responding to complex stress conditions. In addition, expression profiles based on RNA-seq showed that the 47 CaDnaJs were expressed in at least one tissue tested. The result implied that they could be involved in the process of pepper growth and development. qRT-PCR analysis found that 80.60% (54/67) CaDnaJs were induced by HS, indicated that they could participated in pepper response to high temperature treatments. In conclusion, all these results would provide a comprehensive basis for further analyzing the function of CaDnaJ members and be also significant for elucidating the evolutionary relationship in pepper.
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Affiliation(s)
- FangFei Fan
- College of Horticulture, South China Agricultural UniversityGuangzhou, China
| | - Xian Yang
- College of Horticulture, South China Agricultural UniversityGuangzhou, China
| | - Yuan Cheng
- State key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Vegetables, Zhejiang Academy of Agricultural SciencesHangzhou, China
| | - Yunyan Kang
- College of Horticulture, South China Agricultural UniversityGuangzhou, China
| | - Xirong Chai
- College of Horticulture, South China Agricultural UniversityGuangzhou, China
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22
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Xia Z, Huo Y, Wei Y, Chen Q, Xu Z, Zhang W. The Arabidopsis LYST INTERACTING PROTEIN 5 Acts in Regulating Abscisic Acid Signaling and Drought Response. FRONTIERS IN PLANT SCIENCE 2016; 7:758. [PMID: 27313589 PMCID: PMC4887465 DOI: 10.3389/fpls.2016.00758] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 05/17/2016] [Indexed: 05/19/2023]
Abstract
Multivesicular bodies (MVBs) are unique endosomes containing vesicles in the lumens and play essential roles in many eukaryotic cellular processes. The Arabidopsis LYST INTERACTING PROTEIN 5 (LIP5), a positive regulator of MVB biogenesis, has critical roles in biotic and abiotic stress responses. However, whether the abscisic acid (ABA) signaling is involved in LIP5-mediated stress response is largely unknown. Here, we report that LIP5 functions in regulating ABA signaling and drought response in Arabidopsis. Analyses of a LIP5 promoter-β-glucuronidase (GUS) construct revealed substantial GUS activity in whole seedlings. The expression of LIP5 was induced by ABA and drought, and overexpression of LIP5 led to ABA hypersensitivity, enhanced stomatal closure, reduced water loss, and, therefore, increased drought tolerance. On the contrary, LIP5 knockdown mutants showed ABA-insensitive phenotypes and reduced drought tolerance; suggesting that LIP5 acts in regulating ABA response. Further analysis using a fluorescent dye revealed that ABA and water stress induced cell endocytosis or vesicle trafficking in a largely LIP5-dependent manner. Furthermore, expression of several drought- or ABA-inducible marker genes was significantly down-regulated in the lip5 mutant seedlings. Collectively, our data suggest that LIP5 positively regulates drought tolerance through ABA-mediated cell signaling.
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Affiliation(s)
- Zongliang Xia
- College of Life Science, Henan Agricultural UniversityZhengzhou, China
- *Correspondence: Zongliang Xia,
| | - Yongjin Huo
- College of Life Science, Henan Agricultural UniversityZhengzhou, China
| | - Yangyang Wei
- College of Life Science, Henan Agricultural UniversityZhengzhou, China
| | - Qiansi Chen
- Zhengzhou Tobacco Research Institute of CNTCZhengzhou, China
| | - Ziwei Xu
- College of Life Science, Henan Agricultural UniversityZhengzhou, China
| | - Wei Zhang
- China National Tobacco Quality Supervision and Test CentreZhengzhou, China
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23
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Lee DK, Kim HI, Jang G, Chung PJ, Jeong JS, Kim YS, Bang SW, Jung H, Choi YD, Kim JK. The NF-YA transcription factor OsNF-YA7 confers drought stress tolerance of rice in an abscisic acid independent manner. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 241:199-210. [PMID: 26706071 DOI: 10.1016/j.plantsci.2015.10.006] [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: 08/14/2015] [Revised: 10/07/2015] [Accepted: 10/11/2015] [Indexed: 05/24/2023]
Abstract
The mechanisms of plant response and adaptation to drought stress require the regulation of transcriptional networks via the induction of drought-responsive transcription factors. Nuclear Factor Y (NF-Y) transcription factors have aroused interest in roles of plant drought stress responses. However, the molecular mechanism of the NF-Y-induced drought tolerance is not well understood. Here, we functionally analyzed two rice NF-YA genes, OsNF-YA7 and OsNF-YA4. Expression of OsNF-YA7 was induced by drought stress and its overexpression in transgenic rice plants improved their drought tolerance. In contrast, OsNF-YA4 expression was not increased by drought stress and its overexpression in transgenic rice plants did not affect their sensitivity to drought stress. OsNF-YA4 expression was highly induced by the stress-related hormone abscisic acid (ABA), while OsNF-YA7 was not, indicating that OsNF-YA7 mediates drought tolerance in an ABA-independent manner. Analysis of the OsNF-YA7 promoter revealed three ABA-independent DRE/CTR elements and RNA-seq analysis identified 48 genes downstream of OsNFYA7 action putatively involved in the OsNF-YA7-mediated drought tolerance pathway. Taken together, our results suggest an important role for OsNF-YA7 in rice drought stress tolerance.
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Affiliation(s)
- Dong-Keun Lee
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Hyung Il Kim
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Geupil Jang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, South Korea.
| | - Pil Joong Chung
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Jin Seo Jeong
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Youn Shic Kim
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Seung Woon Bang
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Harin Jung
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
| | - Yang Do Choi
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, South Korea.
| | - Ju-Kon Kim
- Crop Biotechnology Institute, Green Bio Science & Technology, Seoul National University, Gangwon-do 25354, South Korea.
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24
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Huo Y, Wang M, Wei Y, Xia Z. Overexpression of the Maize psbA Gene Enhances Drought Tolerance Through Regulating Antioxidant System, Photosynthetic Capability, and Stress Defense Gene Expression in Tobacco. FRONTIERS IN PLANT SCIENCE 2015; 6:1223. [PMID: 26793207 PMCID: PMC4709446 DOI: 10.3389/fpls.2015.01223] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 12/18/2015] [Indexed: 05/20/2023]
Abstract
The psbA (encoding D1 protein) plays an important role in protecting photosystem II (PSII) from oxidative damage in higher plants. In our previous study, the role of the psbA from maize (Zea mays. L) in response to SO2 stress was characterized. To date, information about the involvement of the psbA gene in drought response is scarce. Here we found that overexpression (OE) of ZmpsbA showed increased D1 protein abundance and enhanced drought stress tolerance in tobacco. The drought-tolerant phenotypes of the OE lines were accompanied by increases of key antioxidant enzymes SOD, CAT, and POD activities, but decreases of hydrogen peroxide, malondialdehyde, and ion leakage. Further investigation showed that the OE plants had much less reductions than the wild-type in the net photosynthesis rate (Pn), stomatal conductance (Gs), and the maximal photochemical efficiency of PSII (Fv/Fm) during drought stress; indicating that OE of ZmpsbA may alleviate photosynthesis inhibition during drought. qRT-PCR analysis revealed that there was significantly increased expression of NtLEA5, NtERD10C, NtAREB, and NtCDPK2 in ZmpsbA-OE lines. Together, our results indicate that ZmpsbA improves drought tolerance in tobacco possibly by alleviating photosynthesis reduction, reducing reactive oxygen species accumulation and membrane damage, and modulating stress defense gene expression. ZmpsbA could be exploited for engineering drought-tolerant plants in molecular breeding of crops.
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