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Xu Y, Zhang Y, Ma F, Zhao J, Yang H, Song S, Zhang S. Identification of DREB Family Genes in Banana and Their Function under Drought and Cold Stress. PLANTS (BASEL, SWITZERLAND) 2024; 13:2119. [PMID: 39124237 PMCID: PMC11314547 DOI: 10.3390/plants13152119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/21/2024] [Accepted: 07/25/2024] [Indexed: 08/12/2024]
Abstract
Bananas are one of the most important cash crops in the tropics and subtropics. Drought and low-temperature stress affect the growth of banana. The DREB (dehydration responsive element binding protein) gene family, as one of the major transcription factor families, plays crucial roles in defense against abiotic stress. Currently, systematic analyses of the banana DREB (MaDREB) gene family have not yet been reported. In this study, 103 members of the MaDREB gene family were identified in the banana genome. In addition, transcriptomic analysis results revealed that MaDREBs responded to drought and cold stress. The expression of MaDREB14/22/51 was induced by drought and cold stress; these geneswere selected for further analysis. The qRT-PCR validation results confirmed the transcriptome results. Additionally, transgenic Arabidopsis plants overexpressing MaDREB14/22/51 exhibited enhanced resistance to drought and cold stress by reducing MDA content and increasing PRO and soluble sugar content. This study enhances our understanding of the function of the MaDREB gene family, provides new insights into their regulatory role under abiotic stress, and lays a good foundation for improving drought and cold stress-tolerant banana verities.
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Affiliation(s)
- Yi Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Sanya Institute of Nanjing Agricultural University, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.X.); (Y.Z.)
- State Key Laboratory of Biological Breeding for Tropical Crops, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (F.M.); (J.Z.); (H.Y.)
- Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rual Affairs, Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou 571101, China
- Hainan Seed Industry Laboratory, Sanya 572000, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572000, China
| | - Yanshu Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Sanya Institute of Nanjing Agricultural University, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.X.); (Y.Z.)
| | - Funing Ma
- State Key Laboratory of Biological Breeding for Tropical Crops, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (F.M.); (J.Z.); (H.Y.)
- Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rual Affairs, Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou 571101, China
- Hainan Seed Industry Laboratory, Sanya 572000, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572000, China
| | - Jingxi Zhao
- State Key Laboratory of Biological Breeding for Tropical Crops, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (F.M.); (J.Z.); (H.Y.)
- Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rual Affairs, Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou 571101, China
- Hainan Seed Industry Laboratory, Sanya 572000, China
| | - Huiting Yang
- State Key Laboratory of Biological Breeding for Tropical Crops, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (F.M.); (J.Z.); (H.Y.)
- Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rual Affairs, Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou 571101, China
- Hainan Seed Industry Laboratory, Sanya 572000, China
| | - Shun Song
- State Key Laboratory of Biological Breeding for Tropical Crops, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (F.M.); (J.Z.); (H.Y.)
- Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rual Affairs, Key Laboratory of Tropical Crops Germplasm Resources Genetic Improvement and Innovation of Hainan Province, Haikou 571101, China
- Hainan Seed Industry Laboratory, Sanya 572000, China
- Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Sanya Research Institute, Chinese Academy of Tropical Agricultural Sciences, Sanya 572000, China
| | - Shaoling Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Sanya Institute of Nanjing Agricultural University, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Y.X.); (Y.Z.)
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Prusty A, Panchal A, Singh RK, Prasad M. Major transcription factor families at the nexus of regulating abiotic stress response in millets: a comprehensive review. PLANTA 2024; 259:118. [PMID: 38592589 DOI: 10.1007/s00425-024-04394-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/17/2024] [Indexed: 04/10/2024]
Abstract
Millets stand out as a sustainable crop with the potential to address the issues of food insecurity and malnutrition. These small-seeded, drought-resistant cereals have adapted to survive a broad spectrum of abiotic stresses. Researchers are keen on unravelling the regulatory mechanisms that empower millets to withstand environmental adversities. The aim is to leverage these identified genetic determinants from millets for enhancing the stress tolerance of major cereal crops through genetic engineering or breeding. This review sheds light on transcription factors (TFs) that govern diverse abiotic stress responses and play role in conferring tolerance to various abiotic stresses in millets. Specifically, the molecular functions and expression patterns of investigated TFs from various families, including bHLH, bZIP, DREB, HSF, MYB, NAC, NF-Y and WRKY, are comprehensively discussed. It also explores the potential of TFs in developing stress-tolerant crops, presenting a comprehensive discussion on diverse strategies for their integration.
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Affiliation(s)
- Ankita Prusty
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Anurag Panchal
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Roshan Kumar Singh
- Department of Botany, Mahishadal Raj College, Purba Medinipur, Garh Kamalpur, West Bengal, 721628, India
| | - Manoj Prasad
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India.
- Department of Genetics, University of Delhi, South Campus, Benito-Juarez Road, New Delhi, 110021, India.
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Kalleku JN, Ihsan S, Al-Azzawi TNI, Khan M, Hussain A, Chebitok F, Das AK, Moon YS, Mun BG, Lee IJ, Ali S, Yun BW. Halotolerant Pseudomonas koreensis S4T10 mitigate salt and drought stress in Arabidopsis thaliana. PHYSIOLOGIA PLANTARUM 2024; 176:e14258. [PMID: 38522952 DOI: 10.1111/ppl.14258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/18/2024] [Accepted: 03/02/2024] [Indexed: 03/26/2024]
Abstract
Salt and drought are documented among the most detrimental and persistent abiotic stresses for crop production. Here, we investigated the impact of Pseudomonas koreensis strain S4T10 on plant performance under salt and drought stress. Arabidopsis thaliana Col-0 wild type and atnced3 mutant plants were inoculated with P. koreensis or tap water and exposed to NaCl (100 mM) for five days and drought stress by withholding water for seven days. P. koreensis significantly enhanced plant biomass and photosynthetic pigments under salt and drought stress conditions. Moreover, P. koreensis activated the antioxidant defence by modulating glutathione (GSH), superoxide dismutase (SOD), peroxidase (POD), and polyphenol oxidase (PPO) activities to scavenge the reactive oxygen species produced due to the stress. In addition, the application of P. koreensis upregulated the expression of genes associated with antioxidant responses, such as AtCAT1, AtCAT3, and AtSOD. Similarly, genes linked to salt stress, such as AtSOS1, AtSOS2, AtSOS3, AtNHX1, and AtHKT1, were also upregulated, affirming the positive role of P. koreensis S4T10 in streamlining the cellular influx and efflux transport systems during salt stress. Likewise, the PGPB inoculation was observed to regulate the expression of drought-responsive genes AtDREB2A, AtDREB2B, and ABA-responsive genes AtAO3, AtABA3 indicating that S4T10 enhanced drought tolerance via modulation of the ABA pathway. The results of this study affirm that P. koreensis S4T10 could be further developed as a biofertilizer to mitigate salt and drought stress at the same time.
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Affiliation(s)
- Justine Nathanael Kalleku
- Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea
- Institute of International Research and Development, Kyungpook National University, Republic of Korea
| | - Samsoor Ihsan
- Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea
- Institute of International Research and Development, Kyungpook National University, Republic of Korea
| | - Tiba Nazar Ibrahim Al-Azzawi
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
| | - Murtaza Khan
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
| | - Adil Hussain
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
- Department of Agriculture, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Felistus Chebitok
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
| | - Ashim Kumar Das
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
| | - Yong-Sun Moon
- Department of Horticulture and Life Science, Yeungnam University, Republic of Korea
| | - Bong-Gyu Mun
- Department of Environmental and Biological Chemistry, Chungbuk National University, Cheongju, Republic of Korea
| | - In-Jung Lee
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
| | - Sajid Ali
- Department of Horticulture and Life Science, Yeungnam University, Republic of Korea
| | - Byung-Wook Yun
- Department of Food Security and Agricultural Development, Kyungpook National University, Republic of Korea
- Institute of International Research and Development, Kyungpook National University, Republic of Korea
- Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Republic of Korea
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Mao K, Yang J, Sun Y, Guo X, Qiu L, Mei Q, Li N, Ma F. MdbHLH160 is stabilized via reduced MdBT2-mediated degradation to promote MdSOD1 and MdDREB2A-like expression for apple drought tolerance. PLANT PHYSIOLOGY 2024; 194:1181-1203. [PMID: 37930306 DOI: 10.1093/plphys/kiad579] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 11/07/2023]
Abstract
Drought stress is a key environmental factor limiting the productivity, quality, and geographic distribution of crops worldwide. Abscisic acid (ABA) plays an important role in plant drought stress responses, but the molecular mechanisms remain unclear. Here, we report an ABA-responsive bHLH transcription factor, MdbHLH160, which promotes drought tolerance in Arabidopsis (Arabidopsis thaliana) and apple (Malus domestica). Under drought conditions, MdbHLH160 is directly bound to the MdSOD1 (superoxide dismutase 1) promoter and activated its transcription, thereby triggering reactive oxygen species (ROS) scavenging and enhancing apple drought tolerance. MdbHLH160 also promoted MdSOD1 enzyme activity and accumulation in the nucleus through direct protein interactions, thus inhibiting excessive nuclear ROS levels. Moreover, MdbHLH160 directly upregulated the expression of MdDREB2A-like, a DREB (dehydration-responsive element binding factor) family gene that promotes apple drought tolerance. Protein degradation and ubiquitination assays showed that drought and ABA treatment stabilized MdbHLH160. The BTB protein MdBT2 was identified as an MdbHLH160-interacting protein that promoted MdbHLH160 ubiquitination and degradation, and ABA treatment substantially inhibited this process. Overall, our findings provide insights into the molecular mechanisms of ABA-modulated drought tolerance at both the transcriptional and post-translational levels via the ABA-MdBT2-MdbHLH160-MdSOD1/MdDREB2A-like cascade.
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Affiliation(s)
- Ke Mao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Jie Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Yunxia Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Xin Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Lina Qiu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Quanlin Mei
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Na Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A & F University, Yangling 712100, Shaanxi, China
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Ferrante R, Campagni C, Vettori C, Checcucci A, Garosi C, Paffetti D. Meta-analysis of plant growth-promoting rhizobacteria interaction with host plants: implications for drought stress response gene expression. FRONTIERS IN PLANT SCIENCE 2024; 14:1282553. [PMID: 38288406 PMCID: PMC10823023 DOI: 10.3389/fpls.2023.1282553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/18/2023] [Indexed: 01/31/2024]
Abstract
Introduction The molecular and physiological mechanisms activated in plants during drought stress tolerance are regulated by several key genes with both metabolic and regulatory roles. Studies focusing on crop gene expression following plant growth-promoting rhizobacteria (PGPR) inoculation may help understand which bioinoculant is closely related to the induction of abiotic stress responses. Methods Here, we performed a meta-analysis following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines to summarise information regarding plant-PGPR interactions, focusing on the regulation of nine genes involved in plant drought stress response. The literature research yielded 3,338 reports, of which only 41 were included in the meta-analysis based on the chosen inclusion criteria. The meta-analysis was performed on four genes (ACO, APX, ACS and DREB2); the other five genes (ERD15, MYB, MYC, acdS, WRKY) had an insufficient number of eligible articles. Results Forest plots obtained through each meta-analysis showed that the overexpression of ACO, APX, ACS and DREB2 genes was not statistically significant. Unlike the other genes, DREB2 showed statistically significant results in both the presence and absence of PGPR. Considering I2>75 %, the results showed a high heterogeneity among the studies included, and the cause for this was examined using subgroup analysis. Moreover, the funnel plot and Egger's test showed that the analyses were affected by strong publication bias. Discussion This study argues that the presence of PGPR may not significantly influence the expression of drought stress response-related crop genes. This finding may be due to high heterogeneity, lack of data on the genes examined, and significant publication bias.
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Affiliation(s)
- Roberta Ferrante
- National Biodiversity Future Center (NBFC), Palermo, Italy
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
| | - Chiara Campagni
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
| | - Cristina Vettori
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
- Istituto di Bioscienze e Biorisorse (IBBR), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino, Italy
| | - Alice Checcucci
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
| | - Cesare Garosi
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
| | - Donatella Paffetti
- National Biodiversity Future Center (NBFC), Palermo, Italy
- Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali (DAGRI), Università degli Studi di Firenze, Florence, Italy
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Fan S, Chen J, Yang R. Candidate Genes for Salt Tolerance in Forage Sorghum under Saline Conditions from Germination to Harvest Maturity. Genes (Basel) 2023; 14:genes14020293. [PMID: 36833220 PMCID: PMC9956952 DOI: 10.3390/genes14020293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/23/2022] [Accepted: 01/16/2023] [Indexed: 01/26/2023] Open
Abstract
To address the plant adaptability of sorghum (Sorghum bicolor) in salinity, the research focus should shift from only selecting tolerant varieties to understanding the precise whole-plant genetic coping mechanisms with long-term influence on various phenotypes of interest to expanding salinity, improving water use, and ensuring nutrient use efficiency. In this review, we discovered that multiple genes may play pleiotropic regulatory roles in sorghum germination, growth, and development, salt stress response, forage value, and the web of signaling networks. The conserved domain and gene family analysis reveals a remarkable functional overlap among members of the bHLH (basic helix loop helix), WRKY (WRKY DNA-binding domain), and NAC (NAM, ATAF1/2, and CUC2) superfamilies. Shoot water and carbon partitioning, for example, are dominated by genes from the aquaporins and SWEET families, respectively. The gibberellin (GA) family of genes is prevalent during pre-saline exposure seed dormancy breaking and early embryo development at post-saline exposure. To improve the precision of the conventional method of determining silage harvest maturity time, we propose three phenotypes and their underlying genetic mechanisms: (i) the precise timing of transcriptional repression of cytokinin biosynthesis (IPT) and stay green (stg1 and stg2) genes; (ii) the transcriptional upregulation of the SbY1 gene and (iii) the transcriptional upregulation of the HSP90-6 gene responsible for grain filling with nutritive biochemicals. This work presents a potential resource for sorghum salt tolerance and genetic studies for forage and breeding.
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Stimulation of Tomato Drought Tolerance by PHYTOCHROME A and B1B2 Mutations. Int J Mol Sci 2023; 24:ijms24021560. [PMID: 36675076 PMCID: PMC9864191 DOI: 10.3390/ijms24021560] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/20/2022] [Accepted: 01/07/2023] [Indexed: 01/14/2023] Open
Abstract
Drought stress is a severe environmental issue that threatens agriculture at a large scale. PHYTOCHROMES (PHYs) are important photoreceptors in plants that control plant growth and development and are involved in plant stress response. The aim of this study was to identify the role of PHYs in the tomato cv. 'Moneymaker' under drought conditions. The tomato genome contains five PHYs, among which mutant lines in tomato PHYA and PHYB (B1 and B2) were used. Compared to the WT, phyA and phyB1B2 mutants exhibited drought tolerance and showed inhibition of electrolyte leakage and malondialdehyde accumulation, indicating decreased membrane damage in the leaves. Both phy mutants also inhibited oxidative damage by enhancing the expression of reactive oxygen species (ROS) scavenger genes, inhibiting hydrogen peroxide (H2O2) accumulation, and enhancing the percentage of antioxidant activities via DPPH test. Moreover, expression levels of several aquaporins were significantly higher in phyA and phyB1B2, and the relative water content (RWC) in leaves was higher than the RWC in the WT under drought stress, suggesting the enhancement of hydration status in the phy mutants. Therefore, inhibition of oxidative damage in phyA and phyB1B2 mutants may mitigate the harmful effects of drought by preventing membrane damage and conserving the plant hydrostatus.
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Filyushin MA, Kochieva EZ, Shchennikova AV. ZmDREB2.9 Gene in Maize ( Zea mays L.): Genome-Wide Identification, Characterization, Expression, and Stress Response. PLANTS (BASEL, SWITZERLAND) 2022; 11:3060. [PMID: 36432789 PMCID: PMC9694119 DOI: 10.3390/plants11223060] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
Dehydration-responsive element-binding (DREB) transcription factors of the A2 subfamily play key roles in plant stress responses. In this study, we identified and characterized a new A2-type DREB gene, ZmDREB2.9, in the Zea mays cv. B73 genome and compared its expression profile with those of the known A2-type maize genes ZmDREB2.1-2.8. ZmDREB2.9 was mapped to chromosome 8, contained 18 predicted hormone- and stress-responsive cis-elements in the promoter, and had two splice isoforms: short ZmDREB2.9-S preferentially expressed in the leaves, embryos, and endosperm and long ZmDREB2.9-L expressed mostly in the male flowers, stamens, and ovaries. Phylogenetically, ZmDREB2.9 was closer to A. thaliana DREB2A than the other ZmDREB2 factors. ZmDREB2.9-S, ZmDREB2.2, and ZmDREB2.1/2A were upregulated in response to cold, drought, and abscisic acid and may play redundant roles in maize stress resistance. ZmDREB2.3, ZmDREB2.4, and ZmDREB2.6 were not expressed in seedlings and could be pseudogenes. ZmDREB2.7 and ZmDREB2.8 showed similar transcript accumulation in response to cold and abscisic acid and could be functionally redundant. Our results provide new data on Z. mays DREB2 factors, which can be used for further functional studies as well as in breeding programs to improve maize stress tolerance.
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Barquero M, Poveda J, Laureano-Marín AM, Ortiz-Liébana N, Brañas J, González-Andrés F. Mechanisms involved in drought stress tolerance triggered by rhizobia strains in wheat. FRONTIERS IN PLANT SCIENCE 2022; 13:1036973. [PMID: 36438093 PMCID: PMC9686006 DOI: 10.3389/fpls.2022.1036973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 10/06/2022] [Indexed: 05/29/2023]
Abstract
Rhizobium spp. is a well-known microbial plant biostimulant in non-legume crops, but little is known about the mechanisms by which rhizobia enhance crop productivity under drought stress. This work analyzed the mechanisms involved in drought stress alleviation exerted by Rhizobium leguminosarum strains in wheat plants under water shortage conditions. Two (LBM1210 and LET4910) of the four R. leguminosarum strains significantly improved the growth parameters (fresh and dry aerial weight, FW and DW, respectively), chlorophyll content, and relative water content (RWC) compared to a non-inoculated control under water stress, providing values similar to or even higher for FW (+4%) and RWC (+2.3%) than the non-inoculated and non-stressed control. Some other biochemical parameters and gene expression explain the observed drought stress alleviation, namely the reduction of MDA, H2O2 (stronger when inoculating with LET4910), and ABA content (stronger when inoculating with LBM1210). In agreement with these results, inoculation with LET4910 downregulated DREB2 and CAT1 genes in plants under water deficiency and upregulated the CYP707A1 gene, while inoculation with LBM1210 strongly upregulated the CYP707A1 gene, which encodes an ABA catabolic enzyme. Conversely, from our results, ethylene metabolism did not seem to be involved in the alleviation of drought stress exerted by the two strains, as the expression of the CTR1 gene was very similar in all treatments and controls. The obtained results regarding the effect of the analyzed strains in alleviating drought stress are very relevant in the present situation of climate change, which negatively influences agricultural production.
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Affiliation(s)
- Marcia Barquero
- Institute of Environment, Natural Resources and Biodiversity, University of León, León, Spain
| | - Jorge Poveda
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Universidad Pública de Navarra, Pamplona, Spain
| | - Ana M. Laureano-Marín
- Centro de Tecnologías Agroambientales (CTA) Fertiberia - Edificio CITIUS (Centro de Investigación, Tecnología e Innovación) 1, Sevilla, Spain
| | - Noemí Ortiz-Liébana
- Institute of Environment, Natural Resources and Biodiversity, University of León, León, Spain
| | - Javier Brañas
- Centro de Tecnologías Agroambientales (CTA) Fertiberia - Edificio CITIUS (Centro de Investigación, Tecnología e Innovación) 1, Sevilla, Spain
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Bublyk OM, Andreev IO, Kunakh VA. Comparative Analysis of Promoters of DREB2B Transcription Factor Genes in Deschampsia antarctica and Other Grasses. CYTOL GENET+ 2022. [DOI: 10.3103/s0095452722050048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wu Y, Zhang L, Nie L, Zheng Y, Zhu S, Hou J, Li R, Chen G, Tang X, Wang C, Yuan L. Genome-wide analysis of the DREB family genes and functional identification of the involvement of BrDREB2B in abiotic stress in wucai (Brassica campestris L.). BMC Genomics 2022; 23:598. [PMID: 35978316 PMCID: PMC9382803 DOI: 10.1186/s12864-022-08812-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/30/2022] [Indexed: 11/10/2022] Open
Abstract
Dehydration responsive element binding protein (DREB) is a significant transcription factor class known to be implicated in abiotic stresses. In this study, we systematically conducted a genome-wide identification and expression analysis of the DREB gene family, including gene structures, evolutionary relationships, chromosome distribution, conserved domains, and expression patterns. A total of 65 DREB family gene members were identified in Chinese cabbage (Brassica rapa L.) and were classified into five subgroups based on phylogenetic analysis. Through analysis of the conserved domains of BrDREB family genes, only one exon existed in the gene structure. Through the analysis of cis-acting elements, these genes were mainly involved in hormone regulation and adversity stress. In order to identify the function of BrDREB2B, overexpressed transgenic Arabidopsis was constructed. After different stress treatments, the germination rate, root growth, survival rate, and various plant physiological indicators were measured. The results showed that transgenic Arabidopsis thaliana plants overexpressing BrDREB2B exhibited enhanced tolerance to salt, heat and drought stresses. Taken together, our results are the first to report the BrDREB2B gene response to drought and heat stresses in Chinese cabbage and provide a basis for further studies to determine the function of BrDREBs in response to abiotic stresses.
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Affiliation(s)
- Ying Wu
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Liting Zhang
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Libing Nie
- College of Horticulture and Forestry, Huazhong Agricultural University, 430070, Wuhan, Hubei, China
| | - Yushan Zheng
- College of Horticulture, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, China
| | - Shidong Zhu
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China.,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China
| | - Jinfeng Hou
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China.,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China
| | - Renjie Li
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China
| | - Guohu Chen
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China.,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China
| | - Xiaoyan Tang
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China.,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China
| | - Chenggang Wang
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China. .,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China.
| | - Lingyun Yuan
- College of Horticulture, Anhui Agricultural University, 230036, Hefei, Anhui, China. .,Wanjiang Vegetable Industrial Technology Institute, 238200, Maanshan, Anhui, China.
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12
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Defense Strategies: The Role of Transcription Factors in Tomato-Pathogen Interaction. BIOLOGY 2022; 11:biology11020235. [PMID: 35205101 PMCID: PMC8869667 DOI: 10.3390/biology11020235] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/25/2022] [Accepted: 01/28/2022] [Indexed: 01/21/2023]
Abstract
Simple Summary Tomato is one of the most cultivated and economically important vegetable crops throughout the world. It is affected by a panoply of different pathogens that cause infectious diseases that reduce tomato yield and affect product quality, with the most common symptoms being wilts, leaf spots/blights, fruit spots, and rots. To survive, tomato, as other plants, have developed elaborate defense mechanisms against plant pathogens. Among several genes already identified in tomato response to pathogens, we highlight those encoding the transcription factors (TFs). TFs are regulators of gene expression and are involved in large-scale biological phenomena. Here, we present an overview of recent studies of tomato TFs regarding defense responses to pathogen attack, selected for their abundance, importance, and availability of functionally well-characterized members. Tomato TFs’ roles and the possibilities related to their use for genetic engineering in view of crop breeding are presented. Abstract Tomato, one of the most cultivated and economically important vegetable crops throughout the world, is affected by a panoply of different pathogens that reduce yield and affect product quality. The study of tomato–pathogen system arises as an ideal system for better understanding the molecular mechanisms underlying disease resistance, offering an opportunity of improving yield and quality of the products. Among several genes already identified in tomato response to pathogens, we highlight those encoding the transcription factors (TFs). TFs act as transcriptional activators or repressors of gene expression and are involved in large-scale biological phenomena. They are key regulators of central components of plant innate immune system and basal defense in diverse biological processes, including defense responses to pathogens. Here, we present an overview of recent studies of tomato TFs regarding defense responses to biotic stresses. Hence, we focus on different families of TFs, selected for their abundance, importance, and availability of functionally well-characterized members in response to pathogen attack. Tomato TFs’ roles and possibilities related to their use for engineering pathogen resistance in tomato are presented. With this review, we intend to provide new insights into the regulation of tomato defense mechanisms against invading pathogens in view of plant breeding.
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Liu Z, Zhang Y, Altaf MA, Hao Y, Zhou G, Li X, Zhu J, Ma W, Wang Z, Bao W. Genome-wide identification of myeloblastosis gene family and its response to cadmium stress in Ipomoea aquatica. FRONTIERS IN PLANT SCIENCE 2022; 13:979988. [PMID: 36082298 PMCID: PMC9445626 DOI: 10.3389/fpls.2022.979988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 07/29/2022] [Indexed: 05/14/2023]
Abstract
The myeloblastosis (MYB) proteins perform key functions in mediating cadmium (Cd) tolerance of plants. Ipomoea aquatica has strong adaptability to Cd Stress, while the roles of the I. aquatica MYB gene family with respect to Cd stress are still unclear. Here, we identified a total of 183 MYB genes in the I. aquatica genome (laMYB), which were classified into 66 1R-type IaMYB, 112 2R-type IaMYB, four 3R-type IaMYB, and one 4R-type IaMYB based on the number of the MYB repeat in each gene. The analysis of phylogenetic tree indicated that most of IaMYB genes are associated with the diverse biological processes including defense, development and metabolism. Analysis of sequence features showed that the IaMYB genes within identical subfamily have the similar patterns of the motif distributions and gene structures. Analysis of gene duplication events revealed that the dispersed duplication (DSD) and whole-genome duplication (WGD) modes play vital roles in the expansion of the IaMYB gene family. Expression profiling manifests that approximately 20% of IaMYB genes had significant role in the roots of I. aquatica under Cd stress. Promoter profiling implied that the differentially expressed genes might be induced by environmental factors or inherent hormones and thereby execute their function in Cd response. Remarkably, the 2R-type IaMYB157 with abundant light-responsive element G-box and ABA-responsive element ABRE in its promoter region exhibited very strong response to Cd stress. Taken together, our findings provide an important candidate IaMYB gene for further deciphering the molecular regulatory mechanism in plant with respect to Cd stress.
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Affiliation(s)
- Zheng Liu
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Yuxin Zhang
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Muhammad Ahsan Altaf
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Yuanyuan Hao
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Guangzhen Zhou
- College of Tropical Crops, Hainan University, Haikou, China
| | - Xinyu Li
- College of Tropical Crops, Hainan University, Haikou, China
| | - Jie Zhu
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Wuqiang Ma
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
| | - Zhiwei Wang
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Wenlong Bao
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, College of Horticulture, Hainan University, Haikou, China
- *Correspondence: Wenlong Bao,
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14
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Maharajan T, Krishna TPA, Kiriyanthan RM, Ignacimuthu S, Ceasar SA. Improving abiotic stress tolerance in sorghum: focus on the nutrient transporters and marker-assisted breeding. PLANTA 2021; 254:90. [PMID: 34609619 DOI: 10.1007/s00425-021-03739-5] [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: 07/04/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
Identification of molecular markers and characterization of nutrient transporters could help to improve the tolerance under abiotic and low nutrient stresses in sorghum ensuring higher yield to conserve food security Sorghum is an important cereal crop delivering food and energy security in the semi-arid tropics of the world. Adverse climatic conditions induced by global warming and low input agriculture system in developing countries demand for the improvement of sorghum to tolerate various abiotic stresses. In this review, we discuss the application of marker-assisted breeding and nutrient transporter characterization studies targeted towards improving the tolerance of sorghum under drought, salinity, cold, low phosphate and nitrogen stresses. Family members of some nutrient transporters such as nitrate transporter (NRT), phosphate transporter (PHT) and sulphate transporter (SULTR) were identified and characterized for improving the low nutrient stress tolerance in sorghum. Several quantitative trait loci (QTL) were identified for drought, salinity and cold stresses with an intention to enhance the tolerance of sorghum under these stresses. A very few QTL and nutrient transporters have been identified and validated under low nitrogen and phosphorus stresses compared to those under drought, salinity and cold stresses. Marker-assisted breeding and nutrient transporter characterization have not yet been attempted in sorghum under other macro- and micro-nutrient stresses. We hope this review will raise awareness among plant breeders, scientists and biotechnologists about the importance of sorghum and need to conduct the studies on marker-assisted breeding and nutrient transporter under low nutrient stresses to improve the sorghum production.
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Affiliation(s)
- T Maharajan
- Department of Biosciences, Rajagiri College of Social Sciences, Kochi, Kerala, India
| | - T P Ajeesh Krishna
- Department of Biosciences, Rajagiri College of Social Sciences, Kochi, Kerala, India
| | - Rose Mary Kiriyanthan
- PG and Research Department of Botany, Bharathi Women's College, Chennai, Tamil Nadu, India
| | - S Ignacimuthu
- Xavier Research Foundation, St. Xavier's College, Palayamkottai, India
| | - S Antony Ceasar
- Department of Biosciences, Rajagiri College of Social Sciences, Kochi, Kerala, India.
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15
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Naeem M, Iqbal M, Ul-Allah S, Chaudhary HJ, Nazeer W, Ashraf J, Baloch FS. Expression studies of stress responsive genes in cotton Gossypium hirsutum L. Mol Biol Rep 2021; 48:7077-7085. [PMID: 34535835 DOI: 10.1007/s11033-021-06696-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 08/30/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Cotton is the world's richest source of natural fiber. Meanwhile cotton plant is top ranked stress sensitive plant thereby affecting its yield and fiber quality. But, in climate change scenario, fiber yield and quality are being affected due to environmental stresses, especially heat, drought and salinity. Present study is aimed to identify cotton genotype harboring prominently expressed stress responsive genes. METHODS Four cotton genotypes (IUB-13, IUB-222, IUB-09 and MM-58) were evaluated under drought and salinity stress for yield traits and expression of different stress responsive genes (GhWRKY3, GhDREB2 and GhRDR6). RESULTS Pronounced expression of GhWRKY3, GhDREB2and GhRDR6 was observed in cotton variety IUB-13 in stress condition (drought and salinity) as compared to control followed by IUB-222 which revealed that these genotypes might possess substantial potential to cope with environmental hazards encountered in growing season CONCLUSION: Utilization of cotton genotypes i.e., IUB-13 and IUB-222 in cotton breeding program can be very much fruitful for developing cotton genotypes adoptable to climate change.
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Affiliation(s)
- Muhammad Naeem
- Department of Plant Breeding and Genetics, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.
| | - Muhammad Iqbal
- Department of Plant Breeding and Genetics, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Sami Ul-Allah
- College of Agriculture, Bahadur Sub Campus Layyah, Bahauddin Zakariya University, Multan, Pakistan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Wajad Nazeer
- Department of Plant Breeding and Genetics, Ghazi University, Dera Ghazi Khan, Pakistan
| | - Javeria Ashraf
- Department of Plant Breeding and Genetics, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Faheem Shahzad Baloch
- Faculty of Agricultural Sciences and Technologies, Sivas University of Science and Technology, Sivas, Turkey.
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16
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Li Z, Wang G, Liu X, Wang Z, Zhang M, Zhang J. Genome-wide identification and expression profiling of DREB genes in Saccharum spontaneum. BMC Genomics 2021; 22:456. [PMID: 34139993 PMCID: PMC8212459 DOI: 10.1186/s12864-021-07799-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/10/2021] [Indexed: 12/02/2022] Open
Abstract
Background The dehydration-responsive element-binding proteins (DREBs) are important transcription factors that interact with a DRE/CRT (C-repeat) sequence and involve in response to multiple abiotic stresses in plants. Modern sugarcane are hybrids from the cross between Saccharum spontaneum and Saccharum officinarum, and the high sugar content is considered to the attribution of S. officinaurm, while the stress tolerance is attributed to S. spontaneum. To understand the molecular and evolutionary characterization and gene functions of the DREBs in sugarcane, based on the recent availability of the whole genome information, the present study performed a genome-wide in silico analysis of DREB genes and transcriptome analysis in the polyploidy S. spontaneum. Results Twelve DREB1 genes and six DREB2 genes were identified in S. spontaneum genome and all proteins contained a conserved AP2/ERF domain. Eleven SsDREB1 allele genes were assumed to be originated from tandem duplications, and two of them may be derived after the split of S. spontaneum and the proximal diploid species sorghum, suggesting tandem duplication contributed to the expansion of DREB1-type genes in sugarcane. Phylogenetic analysis revealed that one DREB2 gene was lost during the evolution of sugarcane. Expression profiling showed different SsDREB genes with variable expression levels in the different tissues, indicating seven SsDREB genes were likely involved in the development and photosynthesis of S. spontaneum. Furthermore, SsDREB1F, SsDREB1L, SsDREB2D, and SsDREB2F were up-regulated under drought and cold condition, suggesting that these four genes may be involved in both dehydration and cold response in sugarcane. Conclusions These findings demonstrated the important role of DREBs not only in the stress response, but also in the development and photosynthesis of S. spontaneum. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07799-5.
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Affiliation(s)
- Zhen Li
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Gang Wang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Yancheng Teachers University, Yancheng, 224051, China
| | - Xihui Liu
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, Guangxi, China
| | - Zhengchao Wang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Muqing Zhang
- Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, 530004, Guangxi, China.
| | - Jisen Zhang
- Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. .,Guangxi Key Laboratory of Sugarcane Biology, Guangxi University, Nanning, 530004, Guangxi, China.
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Mao L, Deng M, Jiang S, Zhu H, Yang Z, Yue Y, Zhao K. Characterization of the DREBA4-Type Transcription Factor (SlDREBA4), Which Contributes to Heat Tolerance in Tomatoes. FRONTIERS IN PLANT SCIENCE 2020; 11:554520. [PMID: 33101326 PMCID: PMC7554514 DOI: 10.3389/fpls.2020.554520] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 09/11/2020] [Indexed: 06/09/2023]
Abstract
Dehydration-responsive element binding (DREB) transcription factors play crucial regulatory roles in abiotic stress. The only DREB transcription factor in tomato (Solanum lycopersicum), SlDREBA4 (Accession No. MN197531), which was determined to be a DREBA4 subfamily member, was isolated from cv. Microtom using high-temperature-induced digital gene expression (DGE) profiling technology. The constitutive expression of SlDREBA4 was detected in different tissues of Microtom plants. In addition to responding to high temperature, SlDREBA4 was up-regulated after exposure to abscisic acid (ABA), cold, drought and high-salt conditions. Transgenic overexpression and silencing systems revealed that SlDREBA4 could alter the resistance of transgenic Microtom plants to heat stress by altering the content of osmolytes and stress hormones, and the activities of antioxidant enzymes at the physiologic level. Moreover, SlDREBA4 regulated the downstream gene expression of many heat shock proteins (Hsp), as well as calcium-binding protein enriched in the pathways of protein processing in endoplasmic reticulum (ko04141) and plant-pathogen interaction (ko04626) at the molecular level. SlDREBA4 also induces the expression of biosynthesis genes in jasmonic acid (JA), salicylic acid (SA), and ethylene (ETH), and specifically binds to the DRE elements (core sequence, A/GCCGAC) of the Hsp genes downstream from SlDREBA4. This study provides new genetic resources and rationales for tomato heat-tolerance breeding and the heat-related regulatory mechanisms of DREBs.
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Affiliation(s)
| | | | | | | | | | | | - Kai Zhao
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, China
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Deng MH, Lv JH, Wang ZR, Zhu HS, Yang ZA, Yue YL, Zhao K. Two promoter regions confer heat-induced activation of SlDREBA4 in Solanum lycopersicum. Biochem Biophys Res Commun 2020; 524:689-695. [PMID: 32033747 DOI: 10.1016/j.bbrc.2020.01.153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 11/29/2022]
Abstract
Dehydration-responsive element binding (DREB) transcription factors activate the expression of downstream functional genes in combination with a dehydration-responsive element (DRE), and thereby improve the resistance of plants to abiotic stresses such as heat. However, the upstream regulatory mechanism of DREB genes under heat is unclear. A DREBA4 subfamily transcription factor (SlDREBA4), which is heat-responsive and improves heat resistance, was isolated from Solanum lycopersicum 'Microtom'. In this study, promoter truncation experiments were performed to verify changes in β-glucuronidase (GUS) enzyme activity and GUS gene expression levels in transgenic plants with different lengths of promoter fragments under heat and to identify specific regions in the promoter that respond to heat. Our results showed that the GUS reporter gene was constitutively expressed in tissues of the full-length promoter transgenic 'Microtom' plants, with higher expression in conducting tissues of root, stem, and leaf, as well as sepals of flowers and fruits. Under heat treatment, GUS enzyme activity and GUS gene expression levels in tissues of the full-length promoter transgenic plants increased. Promoter deletion analysis identified two positive regulatory regions (-1095 to -730 bp and -162 to -38 bp) responsible for the promoter's response to heat. These results indicated that the heat shock element (HSE) and MYC recognition sequences may cooperate in heat-induced activation of SlDREBA4 promoter.
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Affiliation(s)
- Ming Hua Deng
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Jun Heng Lv
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Zi Ran Wang
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Hai Shan Zhu
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Zheng An Yang
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Yan Ling Yue
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China
| | - Kai Zhao
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, 650224, PR China.
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Baillo EH, Kimotho RN, Zhang Z, Xu P. Transcription Factors Associated with Abiotic and Biotic Stress Tolerance and Their Potential for Crops Improvement. Genes (Basel) 2019; 10:E771. [PMID: 31575043 PMCID: PMC6827364 DOI: 10.3390/genes10100771] [Citation(s) in RCA: 236] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 09/17/2019] [Accepted: 09/17/2019] [Indexed: 01/24/2023] Open
Abstract
In field conditions, crops are adversely affected by a wide range of abiotic stresses including drought, cold, salt, and heat, as well as biotic stresses including pests and pathogens. These stresses can have a marked effect on crop yield. The present and future effects of climate change necessitate the improvement of crop stress tolerance. Plants have evolved sophisticated stress response strategies, and genes that encode transcription factors (TFs) that are master regulators of stress-responsive genes are excellent candidates for crop improvement. Related examples in recent studies include TF gene modulation and overexpression approaches in crop species to enhance stress tolerance. However, much remains to be discovered about the diverse plant TFs. Of the >80 TF families, only a few, such as NAC, MYB, WRKY, bZIP, and ERF/DREB, with vital roles in abiotic and biotic stress responses have been intensively studied. Moreover, although significant progress has been made in deciphering the roles of TFs in important cereal crops, fewer TF genes have been elucidated in sorghum. As a model drought-tolerant crop, sorghum research warrants further focus. This review summarizes recent progress on major TF families associated with abiotic and biotic stress tolerance and their potential for crop improvement, particularly in sorghum. Other TF families and non-coding RNAs that regulate gene expression are discussed briefly. Despite the emphasis on sorghum, numerous examples from wheat, rice, maize, and barley are included. Collectively, the aim of this review is to illustrate the potential application of TF genes for stress tolerance improvement and the engineering of resistant crops, with an emphasis on sorghum.
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Affiliation(s)
- Elamin Hafiz Baillo
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
- Agricultural Research Corporation (ARC), Ministry of Agriculture, Gezira 21111, Sudan.
| | - Roy Njoroge Kimotho
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Zhengbin Zhang
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
| | - Ping Xu
- Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, University of Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
- Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China.
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An M, Zhou T, Guo Y, Zhao X, Wu Y. Molecular Regulation of Host Defense Responses Mediated by Biological Anti-TMV Agent Ningnanmycin. Viruses 2019; 11:E815. [PMID: 31484426 PMCID: PMC6784071 DOI: 10.3390/v11090815] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 12/28/2022] Open
Abstract
Ningnanmycin (NNM) belongs to microbial pesticides that display comprehensive antiviral activity against plant viruses. NNM treatment has been shown to efficiently delay or suppress the disease symptoms caused by tobacco mosaic virus (TMV) infection in local-inoculated or systemic-uninoculated tobacco leaves, respectively. However, the underlying molecular mechanism of NNM-mediated antiviral activity remains to be further elucidated. In this study, 414 differentially expressed genes (DEGs), including 383 which were up-regulated and 31 down-regulated, caused by NNM treatment in TMV-infected BY-2 protoplasts, were discovered by RNA-seq. In addition, KEGG analysis indicated significant enrichment of DEGs in the plant-pathogen interaction and MAPK signaling pathway. The up-regulated expression of crucial DEGs, including defense-responsive genes, such as the receptor-like kinase FLS2, RLK1, and the mitogen-activated protein kinase kinase kinase MAPKKK, calcium signaling genes, such as the calcium-binding protein CML19, as well as phytohormone responsive genes, such as the WRKY transcription factors WRKY40 and WRKY70, were confirmed by RT-qPCR. These findings provided valuable insights into the antiviral mechanisms of NNM, which indicated that the agent induces tobacco systemic resistance against TMV via activating multiple plant defense signaling pathways.
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Affiliation(s)
- Mengnan An
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China
| | - Tao Zhou
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China
| | - Yi Guo
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China
| | - Xiuxiang Zhao
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China.
| | - Yuanhua Wu
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, Liaoning, China.
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