1
|
Yang Y, Li A, Liu Y, Shu J, Wang J, Guo Y, Li Q, Wang J, Zhou A, Wu C, Wu J. ZmASR1 negatively regulates drought stress tolerance in maize. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 211:108684. [PMID: 38710113 DOI: 10.1016/j.plaphy.2024.108684] [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: 02/21/2024] [Revised: 04/11/2024] [Accepted: 04/30/2024] [Indexed: 05/08/2024]
Abstract
Abscisic acid-, stress-, and ripening-induced (ASR) proteins in plants play a significant role in plant response to diverse abiotic stresses. However, the functions of ASR genes in maize remain unclear. In the present study, we identified a novel drought-induced ASR gene in maize (ZmASR1) and functionally characterized its role in mediating drought tolerance. The transcription of ZmASR1 was upregulated under drought stress and abscisic acid (ABA) treatment, and the ZmASR1 protein was observed to exhibit nuclear and cytoplasmic localization. Moreover, ZmASR1 knockout lines generated with the CRISPR-Cas9 system showed lower ROS accumulation, higher ABA content, and a higher degree of stomatal closure than wild-type plants, leading to higher drought tolerance. Transcriptome sequencing data indicated that the significantly differentially expressed genes in the drought treatment group were mainly enriched in ABA signal transduction, antioxidant defense, and photosynthetic pathway. Taken together, the findings suggest that ZmASR1 negatively regulates drought tolerance and represents a candidate gene for genetic manipulation of drought resistance in maize.
Collapse
Affiliation(s)
- Yun Yang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Aiqi Li
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yuqing Liu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jianguo Shu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jiarong Wang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Yuxin Guo
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Quanzhi Li
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jiahui Wang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Ao Zhou
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Chengyun Wu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jiandong Wu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, 230036, China.
| |
Collapse
|
2
|
Bao H, Cui Y, Ge L, Li Y, Xu X, Tang M, Yi Y, Chen L. OsGEX3 affects anther development and improves osmotic stress tolerance in rice. PLANTA 2024; 259:68. [PMID: 38337086 DOI: 10.1007/s00425-024-04342-0] [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: 09/10/2023] [Accepted: 01/11/2024] [Indexed: 02/12/2024]
Abstract
MAIN CONCLUSION Overexpression and loss of function of OsGEX3 reduce seed setting rates and affect pollen fertility in rice. OsGEX3 positively regulates osmotic stress response by regulating ROS scavenging. GEX3 proteins are conserved in plants. AtGEX3 encodes a plasma membrane protein that plays a crucial role in pollen tube guidance. However, the function of its homolog in rice, OsGEX3, has not been determined. Our results demonstrate that OsGEX3 is localized in the plasma membrane and the nucleus as shown by a transiently transformed assay using Nicotiana benthamiana leaves. The up-regulation of OsGEX3 was detected in response to treatments with polyethylene glycol (PEG) 4000, hydrogen peroxide, and abscisic acid (ABA) via RT-qPCR analysis. Interestingly, we observed a significant decline in the seed setting rates of OsGEX3-OE lines and mutants, compared to the wild type. Further investigations reveal that overexpression and loss of function of OsGEX3 affect pollen maturation. TEM observation revealed a significant decrease in the fertile pollen rates of OsGEX3-OE transgenic lines and Osgex3 mutants due to a delay in pollen development at the late vacuolated stage. Overexpression of OsGEX3 improved osmotic stress and oxidative stress tolerance by enhancing reactive oxygen species (ROS) scavenging in rice seedlings, whereas Osgex3 mutants exhibited an opposite phenotype in osmotic stress. These findings highlight the multifunctional roles of OsGEX3 in pollen development and the response to abiotic stress. The functional characterization of OsGEX3 provides a fundamental basis for rice molecular breeding and can facilitate efforts to cultivate drought resistance and yield-related varieties.
Collapse
Affiliation(s)
- Han Bao
- Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, 361102, China
- School of Life Sciences, Ningxia University, Yinchuan, 750021, China
| | - Yuchao Cui
- Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, 361102, China
| | - Li Ge
- Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, 361102, China
| | - Yan Li
- Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, 361102, China
| | - Xiaorong Xu
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, School of Life Sciences, Guizhou Normal University, Guiyang, 550025, China
| | - Ming Tang
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, School of Life Sciences, Guizhou Normal University, Guiyang, 550025, China
| | - Yin Yi
- Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, School of Life Sciences, Guizhou Normal University, Guiyang, 550025, China
| | - Liang Chen
- Xiamen Key Laboratory for Plant Genetics, School of Life Sciences, Xiamen University, Xiamen, 361102, China.
| |
Collapse
|
3
|
Singh P, Sundaram KT, Vinukonda VP, Venkateshwarlu C, Paul PJ, Pahi B, Gurjar A, Singh UM, Kalia S, Kumar A, Singh VK, Sinha P. Superior haplotypes of key drought-responsive genes reveal opportunities for the development of climate-resilient rice varieties. Commun Biol 2024; 7:89. [PMID: 38216712 PMCID: PMC10786901 DOI: 10.1038/s42003-024-05769-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 01/02/2024] [Indexed: 01/14/2024] Open
Abstract
Haplotype-based breeding is an emerging and innovative concept that enables the development of designer crop varieties by exploiting and exploring superior alleles/haplotypes among target genes to create new traits in breeding programs. In this regard, whole-genome re-sequencing of 399 genotypes (landraces and breeding lines) from the 3000 rice genomes panel (3K-RG) is mined to identify the superior haplotypes for 95 drought-responsive candidate genes. Candidate gene-based association analysis reveals 69 marker-trait associations (MTAs) in 16 genes for single plant yield (SPY) under drought stress. Haplo-pheno analysis of these 16 genes identifies superior haplotypes for seven genes associated with the higher SPY under drought stress. Our study reveals that the performance of lines possessing superior haplotypes is significantly higher (p ≤ 0.05) as measured by single plant yield (SPY), for the OsGSK1-H4, OsDSR2-H3, OsDIL1-H22, OsDREB1C-H3, ASR3-H88, DSM3-H4 and ZFP182-H4 genes as compared to lines without the superior haplotypes. The validation results indicate that a superior haplotype for the DREB transcription factor (OsDREB1C) is present in all the drought-tolerant rice varieties, while it was notably absent in all susceptible varieties. These lines carrying the superior haplotypes can be used as potential donors in haplotype-based breeding to develop high-yielding drought-tolerant rice varieties.
Collapse
Affiliation(s)
- Preeti Singh
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India
| | - Krishna T Sundaram
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India
| | | | | | - Pronob J Paul
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India
| | - Bandana Pahi
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India
| | - Anoop Gurjar
- International Rice Research Institute, South Asia Regional Centre (ISARC), Varanasi, India
| | - Uma Maheshwar Singh
- International Rice Research Institute, South Asia Regional Centre (ISARC), Varanasi, India
| | - Sanjay Kalia
- Department of Biotechnology, CGO Complex, Lodhi Road, New Delhi, India
| | - Arvind Kumar
- International Rice Research Institute, South Asia Regional Centre (ISARC), Varanasi, India
- International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, India
| | - Vikas K Singh
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India.
| | - Pallavi Sinha
- International Rice Research Institute (IRRI), South-Asia Hub, Hyderabad, India.
| |
Collapse
|
4
|
He Z, Li M, Pan X, Peng Y, Shi Y, Han Q, Shi M, She L, Borovskii G, Chen X, Gu X, Cheng X, Zhang W. R-loops act as regulatory switches modulating transcription of COLD-responsive genes in rice. THE NEW PHYTOLOGIST 2024; 241:267-282. [PMID: 37849024 DOI: 10.1111/nph.19315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/22/2023] [Indexed: 10/19/2023]
Abstract
COLD is a major naturally occurring stress that usually causes complex symptoms and severe yield loss in crops. R-loops function in various cellular processes, including development and stress responses, in plants. However, how R-loops function in COLD responses is largely unknown in COLD susceptible crops like rice (Oryza sativa L.). We conducted DRIP-Seq along with other omics data (RNA-Seq, DNase-Seq and ChIP-Seq) in rice with or without COLD treatment. COLD treatment caused R-loop reprogramming across the genome. COLD-biased R-loops had higher GC content and novel motifs for the binding of distinct transcription factors (TFs). Moreover, R-loops can directly/indirectly modulate the transcription of a subset of COLD-responsive genes, which can be mediated by R-loop overlapping TF-centered or cis-regulatory element-related regulatory networks and lncRNAs, accounting for c. 60% of COLD-induced expression of differential genes in rice, which is different from the findings in Arabidopsis. We validated two R-loop loci with contrasting (negative/positive) roles in the regulation of two individual COLD-responsive gene expression, as potential targets for enhanced COLD resistance. Our study provides detailed evidence showing functions of R-loop reprogramming during COLD responses and provides some potential R-loop loci for genetic and epigenetic manipulation toward breeding of rice varieties with enhanced COLD tolerance.
Collapse
Affiliation(s)
- Zexue He
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Mengqi Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Xiucai Pan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
- Xiangyang Academy of Agricultural Sciences, Xiangyang, Hubei Province, 441057, China
| | - Yulian Peng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Yining Shi
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Qi Han
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Manli Shi
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Linwei She
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Gennadii Borovskii
- Siberian Institute of Plant Physiology and Biochemistry, Siberian Branch of Russian Academy of Sciences (SB RAS) Irkutsk, Lermontova, 664033, Russia
| | - Xiaojun Chen
- Key Lab of Agricultural Biotechnology of Ningxia, Ningxia Academy of Agriculture and Forestry Sciences, YinChuan, 750002, China
| | - Xiaofeng Gu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xuejiao Cheng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| | - Wenli Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production Co-Sponsored by Province and Ministry (CIC-MCP), Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China
| |
Collapse
|
5
|
Zheng P, Liu M, Pang L, Sun R, Yao M, Wang X, Kang Z, Liu J. Stripe rust effector Pst21674 compromises wheat resistance by targeting transcription factor TaASR3. PLANT PHYSIOLOGY 2023; 193:2806-2824. [PMID: 37706535 DOI: 10.1093/plphys/kiad497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/15/2023]
Abstract
Pathogens compromise host defense responses by strategically secreting effector proteins. However, the molecular mechanisms by which effectors manipulate disease-resistance factors to evade host surveillance remain poorly understood. In this study, we characterized a Puccinia striiformis f. sp. tritici (Pst) effector Pst21674 with a signal peptide. Pst21674 was significantly upregulated during Pst infections in wheat (Triticum aestivum L.) and knocking down Pst21674 by host-induced gene silencing led to reduced Pst pathogenicity and restricted hyphal spread in wheat. Pst21674 interaction with the abscisic acid-, stress-, and ripening-induced protein TaASR3 was validated mainly in the nucleus. Size exclusion chromatography, bimolecular fluorescence complementation, and luciferase complementation imaging assays confirmed that TaASR3 could form a functional tetramer. Virus-induced gene silencing and overexpression demonstrated that TaASR3 contributes to wheat resistance to stripe rust by promoting accumulation of reactive oxygen species and cell death. Additionally, transcriptome analysis revealed that the expression of defense-related genes was regulated in transgenic wheat plants overexpressing TaASR3. Interaction between Pst21674 and TaASR3 interfered with the polymerization of TaASR3 and suppressed TaASR3-mediated transcriptional activation of defense-related genes. These results indicate that Pst21674 serves as an important virulence factor secreted into the host nucleus to impede wheat resistance to Pst, possibly by targeting and preventing polymerization of TaASR3.
Collapse
Affiliation(s)
- Peijing Zheng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Mengxue Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lijing Pang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Ruyi Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Mohan Yao
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xiaojie Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jie Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| |
Collapse
|
6
|
Zhu X, Chen L, Zhang Z, Li J, Zhang H, Li Z, Pan Y, Wang X. Genetic-based dissection of resistance to bacterial leaf streak in rice by GWAS. BMC PLANT BIOLOGY 2023; 23:396. [PMID: 37596557 PMCID: PMC10436437 DOI: 10.1186/s12870-023-04412-7] [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: 06/28/2023] [Accepted: 08/14/2023] [Indexed: 08/20/2023]
Abstract
BACKGROUND Rice is the second-largest food crop in the world and vulnerable to bacterial leaf streak disease. A thorough comprehension of the genetic foundation of agronomic traits was essential for effective implementation of molecular marker-assisted selection. RESULTS Our study aimed to evaluate the vulnerability of rice to bacterial leaf streak disease (BLS) induced by the gram-negative bacterium Xanthomonas oryzae pv. oryzicola (Xoc). In order to accomplish this, we first analyzed the population structure of 747 accessions and subsequently assessed their phenotypes 20 days after inoculation with a strain of Xoc, GX01. We conducted genome-wide association studies (GWAS) on a population of 747 rice accessions, consisting of both indica and japonica subpopulations, utilizing phenotypic data on resistance to bacterial leaf streak (RBLS) and sequence data. We identified a total of 20 QTLs associated with RBLS in our analysis. Through the integration of linkage mapping, sequence analysis, haplotype analysis, and transcriptome analysis, we were able to identify five potential candidate genes (OsRBLS1-OsRBLS5) that possess the potential to regulate RBLS in rice. In order to gain a more comprehensive understanding of the genetic mechanism behind resistance to bacterial leaf streak, we conducted tests on these genes in both the indica and japonica subpopulations, ultimately identifying superior haplotypes that suggest the potential utilization of these genes in breeding disease-resistant rice varieties. CONCLUSIONS The findings of our study broaden our comprehension of the genetic mechanisms underlying RBLS in rice and offer significant insights that can be applied towards genetic improvement and breeding of disease-resistant rice in rapidly evolving environmental conditions.
Collapse
Affiliation(s)
- Xiaoyang Zhu
- State Key Laboratory of Agrobiotechnology / Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China
| | - Lei Chen
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, 572025, People's Republic of China
- Guangxi Key Laboratory of Rice Genetics and Breeding, Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, China
| | - Zhanying Zhang
- State Key Laboratory of Agrobiotechnology / Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China
| | - Jinjie Li
- State Key Laboratory of Agrobiotechnology / Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China
| | - Hongliang Zhang
- State Key Laboratory of Agrobiotechnology / Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China
| | - Zichao Li
- State Key Laboratory of Agrobiotechnology / Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China
| | - Yinghua Pan
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, 572025, People's Republic of China.
- Guangxi Key Laboratory of Rice Genetics and Breeding, Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, China.
| | - Xueqiang Wang
- Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, 572025, People's Republic of China.
- Zhejiang Provincial Key Laboratory of Crop Genetic Resources, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
7
|
Chaudhary J, Gautam T, Gahlaut V, Singh K, Kumar S, Batra R, Gupta PK. Identification and characterization of RuvBL DNA helicase genes for tolerance against abiotic stresses in bread wheat (Triticum aestivum L.) and related species. Funct Integr Genomics 2023; 23:255. [PMID: 37498392 DOI: 10.1007/s10142-023-01177-y] [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: 11/02/2022] [Revised: 07/13/2023] [Accepted: 07/13/2023] [Indexed: 07/28/2023]
Abstract
Recombination UVB (sensitivity) like (RuvBL) helicase genes represent a conserved family of genes, which are known to be involved in providing tolerance against abiotic stresses like heat and drought. We identified nine wheat RuvBL genes, one each on nine different chromosomes, belonging to homoeologous groups 2, 3, and 4. The lengths of genes ranged from 1647 to 2197 bp and exhibited synteny with corresponding genes in related species including Ae. tauschii, Z. mays, O. sativa, H. vulgare, and B. distachyon. The gene sequences were associated with regulatory cis-elements and transposable elements. Two genes, namely TaRuvBL1a-4A and TaRuvBL1a-4B, also carried targets for a widely known miRNA, tae-miR164. Gene ontology revealed that these genes were closely associated with ATP-dependent formation of histone acetyltransferase complex. Analysis of the structure and function of RuvBL proteins revealed that the proteins were localized mainly in the cytoplasm. A representative gene, namely TaRuvBL1a-4A, was also shown to be involved in protein-protein interactions with ten other proteins. On the basis of phylogeny, RuvBL proteins were placed in two sub-divisions, namely RuvBL1 and RuvBL2, which were further classified into clusters and sub-clusters. In silico studies suggested that these genes were differentially expressed under heat/drought. The qRT-PCR analysis confirmed that expression of TaRuvBL genes differed among wheat cultivars, which differed in the level of thermotolerance. The present study advances our understanding of the biological role of wheat RuvBL genes and should help in planning future studies on RuvBL genes in wheat including use of RuvBL genes in breeding thermotolerant wheat cultivars.
Collapse
Affiliation(s)
- Jyoti Chaudhary
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, 250004, Meerut, India
| | - Tinku Gautam
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, 250004, Meerut, India
- Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, SK, Canada
| | - Vijay Gahlaut
- Council of Scientific & Industrial Research-Institute of Himalayan Bioresource Technology, Palampur, India
- Department of Biotechnology, University Center for Research and Development, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India
| | - Kalpana Singh
- Department of Bioinformatics, College of animal Biotechnology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Sourabh Kumar
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, 250004, Meerut, India
| | - Ritu Batra
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, 250004, Meerut, India
- IIMT University, 'O' Pocket, Ganga Nagar, Meerut, India
| | - Pushpendra Kumar Gupta
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, 250004, Meerut, India.
| |
Collapse
|
8
|
Zhang Y, Ma H, Zhou T, Zhu Z, Zhang Y, Zhao X, Wang C. ThASR3 confers salt and osmotic stress tolerances in transgenic Tamarix and Arabidopsis. BMC PLANT BIOLOGY 2022; 22:586. [PMID: 36517747 PMCID: PMC9749169 DOI: 10.1186/s12870-022-03942-w] [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: 07/28/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND ASR (abscisic acid-, stress-, and ripening-induced) gene family plays a crucial role in responding to abiotic stresses in plants. However, the roles of ASR genes protecting plants against high salt and drought stresses remain unknown in Tamarix hispida. RESULTS In this study, a salt and drought-induced ASR gene, ThASR3, was isolated from Tamarix hispida. Transgenic Arabidopsis overexpressing ThASR3 exhibited stimulating root growth and increasing fresh weight compared with wild-type (WT) plants under both salt and water deficit stresses. To further analyze the gain- and loss-of-function of ThASR3, the transgenic T. hispida plants overexpressing or RNA interference (RNAi)-silencing ThASR3 were generated using transient transformation. The overexpression of ThASR3 in Tamarix and Arabidopsis plants displayed enhanced reactive oxygen species (ROS) scavenging capability under high salt and osmotic stress conditions, including increasing the activities of antioxidant enzymes and the contents of proline and betaine, and reducing malondialdehyde (MDA) content and electrolyte leakage rates. CONCLUSION Our results indicate that ThASR3 functions as a positive regulator in Tamarix responses to salt and osmotic stresses and confers multiple abiotic stress tolerances in transgenic plants, which may have an important application value in the genetic improvement of forest tree resistance.
Collapse
Affiliation(s)
- Yu Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Huijun Ma
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
| | - Tianchang Zhou
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
| | - Zhenyu Zhu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
| | - Yue Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
| | - Xin Zhao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China
| | - Chao Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China.
| |
Collapse
|
9
|
Zheng Y, Zong J, Liu J, Wang R, Chen J, Guo H, Kong W, Liu J, Chen Y. Mining for salt-tolerant genes from halophyte Zoysia matrella using FOX system and functional analysis of ZmGnTL. FRONTIERS IN PLANT SCIENCE 2022; 13:1063436. [PMID: 36466287 PMCID: PMC9714509 DOI: 10.3389/fpls.2022.1063436] [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: 10/07/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
Zoysia matrella is a salt-tolerant turfgrass grown in areas with high soil salinity irrigated with effluent water. Previous studies focused on explaining the regulatory mechanism of Z. matrella salt-tolerance at phenotypic and physiological levels. However, the molecular mechanism associated with salt tolerance of Z. matrella remained unclear. In this study, a high-efficient method named FOX (full-length cDNA overexpression) hunting system was used to search for salt-tolerant genes in Z. matrella. Eleven candidate genes, including several known or novel salt-tolerant genes involved in different metabolism pathways, were identified. These genes exhibited inducible expression under salt stress condition. Furthermore, a novel salt-inducible candidate gene ZmGnTL was transformed into Arabidopsis for functional analysis. ZmGnTL improved salt-tolerance through regulating ion homeostasis, reactive oxygen species scavenging, and osmotic adjustment. In summary, we demonstrated that FOX is a reliable system for discovering novel genes relevant to salt tolerance and several candidate genes were identified from Z. matrella that can assist molecular breeding for plant salt-tolerance improvement.
Collapse
Affiliation(s)
- Yuying Zheng
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Junqin Zong
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Jun Liu
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Ruying Wang
- Department of Horticulture, Oregon State University, Corvallis, OR, United States
| | - Jingbo Chen
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Hailin Guo
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Weiyi Kong
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Jianxiu Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Yu Chen
- College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
10
|
Asati R, Tripathi MK, Tiwari S, Yadav RK, Tripathi N. Molecular Breeding and Drought Tolerance in Chickpea. LIFE (BASEL, SWITZERLAND) 2022; 12:life12111846. [PMID: 36430981 PMCID: PMC9698494 DOI: 10.3390/life12111846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 11/16/2022]
Abstract
Cicer arietinum L. is the third greatest widely planted imperative pulse crop worldwide, and it belongs to the Leguminosae family. Drought is the utmost common abiotic factor on plants, distressing their water status and limiting their growth and development. Chickpea genotypes have the natural ability to fight drought stress using certain strategies viz., escape, avoidance and tolerance. Assorted breeding methods, including hybridization, mutation, and marker-aided breeding, genome sequencing along with omics approaches, could be used to improve the chickpea germplasm lines(s) against drought stress. Root features, for instance depth and root biomass, have been recognized as the greatest beneficial morphological factors for managing terminal drought tolerance in the chickpea. Marker-aided selection, for example, is a genomics-assisted breeding (GAB) strategy that can considerably increase crop breeding accuracy and competence. These breeding technologies, notably marker-assisted breeding, omics, and plant physiology knowledge, underlined the importance of chickpea breeding and can be used in future crop improvement programmes to generate drought-tolerant cultivars(s).
Collapse
Affiliation(s)
- Ruchi Asati
- Department of Genetics & Plant Breeding, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
| | - Manoj Kumar Tripathi
- Department of Genetics & Plant Breeding, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
- Department of Plant Molecular Biology & Biotechnology, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
- Correspondence: (M.K.T.); (N.T.)
| | - Sushma Tiwari
- Department of Genetics & Plant Breeding, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
- Department of Plant Molecular Biology & Biotechnology, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
| | - Rakesh Kumar Yadav
- Department of Genetics & Plant Breeding, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior 474002, India
| | - Niraj Tripathi
- Directorate of Research Services, Jawaharlal Nehru Agricultural University, Jabalpur 482004, India
- Correspondence: (M.K.T.); (N.T.)
| |
Collapse
|
11
|
Srivastava D, Verma G, Chawda K, Chauhan AS, Pande V, Chakrabarty D. Overexpression of Asr6, abscisic acid stress-ripening protein, enhances drought tolerance and modulates gene expression in rice (Oryza sativa L.). ENVIRONMENTAL AND EXPERIMENTAL BOTANY 2022; 202:105005. [DOI: 10.1016/j.envexpbot.2022.105005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
|
12
|
Zhang Q, Liu Y, Jiang Y, Li A, Cheng B, Wu J. OsASR6 Enhances Salt Stress Tolerance in Rice. Int J Mol Sci 2022; 23:ijms23169340. [PMID: 36012605 PMCID: PMC9408961 DOI: 10.3390/ijms23169340] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 11/18/2022] Open
Abstract
High salinity seriously affects crop growth and yield. Abscisic acid-, stress-, and ripening-induced (ASR) proteins play an important role in plant responses to multiple abiotic stresses. In this study, we identified a new salt-induced ASR gene in rice (OsASR6) and functionally characterized its role in mediating salt tolerance. Transcript levels of OsASR6 were upregulated under salinity stress, H2O2 and abscisic acid (ABA) treatments. Nuclear and cytoplasmic localization of the OsASR6 protein were confirmed. Meanwhile, a transactivation activity assay in yeast demonstrated no self-activation ability. Furthermore, transgenic rice plants overexpressing OsASR6 showed enhanced salt and oxidative stress tolerance as a result of reductions in H2O2, malondialdehyde (MDA), Na/K and relative electrolyte leakage. In contrast, OsASR6 RNAi transgenic lines showed opposite results. A higher ABA content was also measured in the OsASR6 overexpressing lines compared with the control. Moreover, OsNCED1, a key enzyme of ABA biosynthesis, was found to interact with OsASR6. Collectively, these results suggest that OsASR6 serves primarily as a functional protein, enhancing tolerance to salt stress, representing a candidate gene for genetic manipulation of new salinity-resistant lines in rice.
Collapse
|
13
|
Sharma H, Batra R, Kumar S, Kumar M, Kumar S, Balyan HS, Gupta PK. Identification and characterization of 20S proteasome genes and their relevance to heat/drought tolerance in bread wheat. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
14
|
Dominguez PG, Conti G, Duffy T, Insani M, Alseekh S, Asurmendi S, Fernie AR, Carrari F. Multiomics analyses reveal the roles of the ASR1 transcription factor in tomato fruits. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:6490-6509. [PMID: 34100923 DOI: 10.1093/jxb/erab269] [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: 01/24/2021] [Accepted: 06/05/2021] [Indexed: 06/12/2023]
Abstract
The transcription factor ASR1 (ABA, STRESS, RIPENING 1) plays multiple roles in plant responses to abiotic stresses as well as being involved in the regulation of central metabolism in several plant species. However, despite the high expression of ASR1 in tomato fruits, large scale analyses to uncover its function in fruits are still lacking. In order to study its function in the context of fruit ripening, we performed a multiomics analysis of ASR1-antisense transgenic tomato fruits at the transcriptome and metabolome levels. Our results indicate that ASR1 is involved in several pathways implicated in the fruit ripening process, including cell wall, amino acid, and carotenoid metabolism, as well as abiotic stress pathways. Moreover, we found that ASR1-antisense fruits are more susceptible to the infection by the necrotrophic fungus Botrytis cinerea. Given that ASR1 could be regulated by fruit ripening regulators such as FRUITFULL1/FRUITFULL2 (FUL1/FUL2), NON-RIPENING (NOR), and COLORLESS NON-RIPENING (CNR), we positioned it in the regulatory cascade of red ripe tomato fruits. These data extend the known range of functions of ASR1 as an important auxiliary regulator of tomato fruit ripening.
Collapse
Affiliation(s)
- Pia Guadalupe Dominguez
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Buenos Aires, Argentina
| | - Gabriela Conti
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Buenos Aires, Argentina
- Facultad de Agronomía. Cátedra de Genética. Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Tomás Duffy
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Buenos Aires, Argentina
| | - Marina Insani
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Buenos Aires, Argentina
| | - Saleh Alseekh
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Sebastián Asurmendi
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Hurlingham, Buenos Aires, Argentina
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Fernando Carrari
- Facultad de Agronomía. Cátedra de Genética. Universidad de Buenos Aires, Buenos Aires, Argentina
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE-UBA-CONICET), Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| |
Collapse
|
15
|
Qiu D, Hu W, Zhou Y, Xiao J, Hu R, Wei Q, Zhang Y, Feng J, Sun F, Sun J, Yang G, He G. TaASR1-D confers abiotic stress resistance by affecting ROS accumulation and ABA signalling in transgenic wheat. PLANT BIOTECHNOLOGY JOURNAL 2021; 19:1588-1601. [PMID: 33638922 PMCID: PMC8384601 DOI: 10.1111/pbi.13572] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 02/14/2021] [Accepted: 02/18/2021] [Indexed: 05/20/2023]
Abstract
Cultivating new crop cultivars with multiple abiotic stress tolerances is important for crop production. The abscisic acid-stress-ripening (ASR) protein has been shown to confer abiotic stress tolerance in plants. However, the mechanisms of ASR function under stress condition remain largely unclear. In this study, we characterized all ASR family members in common wheat and constitutively overexpressed TaASR1-D in a commercial hexaploid wheat cultivar Zhengmai 9023. The transgenic wheat plants exhibited increased tolerance to multiple abiotic stresses and increased grain yields under salt stress condition. Overexpression of TaASR1-D conferred enhanced antioxidant capacity and ABA sensitivity in transgenic wheat plants. Further, RNA in situ hybridization results showed that TaASR1-D had higher expression levels in the vascular tissues of leaves and the parenchyma cells around the vascular tissues of roots and stems. Yeast one-hybrid and electrophoretic mobility shift assays revealed that TaASR1-D could directly bind the specific cis-elements in the promoters of TaNCED1 and TaGPx1-D. In conclusion, our findings suggest that TaASR1-D can be used to breed new wheat cultivars with increased multiple abiotic stress tolerances, and TaASR1-D enhances abiotic stress tolerances by reinforcing antioxidant capacity and ABA signalling.
Collapse
Affiliation(s)
- Ding Qiu
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical CropsInstitute of Tropical Bioscience and BiotechnologyChinese Academy of Tropical Agricultural SciencesHaikouChina
| | - Yu Zhou
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Jie Xiao
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Rui Hu
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Qiuhui Wei
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Yang Zhang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Jialu Feng
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Fusheng Sun
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Jiutong Sun
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Guangxiao Yang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| | - Guangyuan He
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and TechnologyKey Laboratory of Molecular Biophysics of Chinese Ministry of EducationCollege of Life Science and TechnologyHuazhong University of Science and Technology (HUST)WuhanChina
| |
Collapse
|
16
|
Yoon JS, Kim JY, Kim DY, Seo YW. A novel wheat ASR gene, TaASR2D, enhances drought tolerance in Brachypodium distachyon. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 159:400-414. [PMID: 33229191 DOI: 10.1016/j.plaphy.2020.11.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/13/2020] [Indexed: 06/11/2023]
Abstract
Abscisic acid-, stress-, and ripening-induced (ASR) proteins play an important role in protecting plants against adverse environmental conditions. Here, we identified 24 ASR genes in the wheat genome and analyzed their characteristics. Among these, five ASR genes highly induced by abscisic acid (ABA) and polyethylene glycol were cloned and further characterized. The TaASR genes were expressed in response to different abiotic stresses and ABA and were found to be localized in the nucleus and plasma membrane of transformed tobacco cells. Brachypodium distachyon transgenic plants overexpressing TaASR2D showed enhanced drought tolerance by regulating leaf transpiration. The expression levels of stress-related and ABA-responsive genes were higher in transgenic plants than in wild-type plants under drought stress conditions. Moreover, overexpression of TaASR2D increased the levels of both endogenous ABA and hydrogen peroxide in response to drought stress, and these plants showed hypersensitivity to exogenous ABA at the germination stage. Furthermore, plants overexpressing TaASR2D showed increased stomatal closure. Further analysis revealed that TaASR2D interacts with ABA biosynthesis and stress-related proteins in yeast and tobacco plants. Collectively, these findings indicate that TaASR2D plays an important role in the response of plants to drought stress by regulating the ABA biosynthesis pathway and redox homeostasis system.
Collapse
Affiliation(s)
- Jin Seok Yoon
- Department of Plant Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Jae Yoon Kim
- Department of Plant Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea; Department of Plant Resources, Kongju National University, Yesan, Chungnam, 32439, Republic of Korea
| | - Dae Yeon Kim
- Department of Plant Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Yong Weon Seo
- Department of Plant Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea.
| |
Collapse
|
17
|
Meena RP, Vishwakarma H, Ghosh G, Gaikwad K, Chellapilla TS, Singh MP, Padaria JC. Novel ASR isolated from drought stress responsive SSH library in pearl millet confers multiple abiotic stress tolerance in PgASR3 transgenic Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 156:7-19. [PMID: 32891968 DOI: 10.1016/j.plaphy.2020.07.031] [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: 05/10/2020] [Revised: 07/09/2020] [Accepted: 07/15/2020] [Indexed: 05/09/2023]
Abstract
A genomic resource of drought stress responsive genes/ESTs was generated using Suppression Subtractive Hybridization (SSH) approach in a drought stress tolerant Pennisetum glaucum genotype 841B. Fifty five days old plants were subjected to drought stress after withholding water for different time intervals (10 days, 15 days, 20 days and 25 days). A forward subtractive cDNA library was prepared from isolated RNA of leaf tissue. Differential gene expression under drought stress was validated for selected nine contigs by RT-qPCR. A transcript homologous to Setaria italica ASR3 upregulated under drought stress was isolated from genotype 841B and characterized. Heterologous expression of PgASR3 was validated in Arabidopsis and confirmed under multiple abiotic stress conditions. A total of four independent transgenic lines overexpressing gene PgASR3 were analyzed by Southern blot at T1 stage. For drought stress tolerance, three independent lines (T2 stage) were analyzed by biochemical and physiological assays at seedling stage. The growth rate (shoot and root length) of transgenic seedlings improved as compared to WT seedling under differenct abiotic stress conditions. The three transgenic lines were also validated for drought stress tolerance and RT-qPCR analysis, at maturity stage. Under drought stress conditions, the mature transgenic lines showed higher levels of RWC, chlorophyll and proline but lower levels of MDA as compared to WT plants. PgASR3 gene isolated and validated in this study can be utilized for developing abiotic stress tolerant crops.
Collapse
Affiliation(s)
| | | | - Gourab Ghosh
- National Institute for Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Kishor Gaikwad
- National Institute for Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Tara Satyavathi Chellapilla
- National Institute for Plant Biotechnology, Pusa Campus, New Delhi, India; Division of Genetics, IARI, Pusa Campus, New Delhi, India
| | - Madan Pal Singh
- Division of Plant Physiology, IARI Pusa Campus, New Delhi, India
| | | |
Collapse
|
18
|
Yang L, Lei L, Liu H, Wang J, Zheng H, Zou D. Whole-genome mining of abiotic stress gene loci in rice. PLANTA 2020; 252:85. [PMID: 33052473 DOI: 10.1007/s00425-020-03488-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 10/01/2020] [Indexed: 06/11/2023]
Abstract
We projected meta-QTL (MQTL) for drought, salinity, cold state, and high metal ion tolerance in rice using a meta-analysis based on high-density consensus maps. In addition, a genome-wide association analysis was used to validate the results of the meta-analysis, and four new chromosome intervals for mining abiotic stress candidate genes were obtained. Drought, severe cold, high salinity, and high metallic ion concentrations severely restrict rice production. Consequently, the breeding of abiotic stress-tolerant variety is being paid increasingly more attention. This study aimed to identify meta-quantitative trait loci (MQTL) for abiotic stress tolerance in rice, as well as the molecular markers and potential candidate genes of the MQTL regions. We summarized 2785 rice QTL and conducted a meta-analysis of 159 studies. We found 82 drought tolerance (DT), 70 cold tolerance (CT), 70 salt tolerance (ST), and 51 heavy metal ion tolerance (IT) meta-QTL, as well as 20 DT, 11 CT, 22 ST, and 5 IT candidate genes in the MQTL interval. Thirty-one multiple-tolerance related MQTL regions, which were highly enriched, were also detected, and 13 candidate genes related to multiple-tolerance were obtained. In addition, the correlation between DT, CT, and ST was significant in the rice genome. Four candidate genes and four MM-QTL regions were detected simultaneously by GWAS and meta-analysis. The four candidate genes showed distinct genetic differentiation and substantial genetic distance between indica and japonica rice, and the four MM-QTL are potential intervals for mining abiotic stress-related candidate genes. The candidate genes identified in this study will not only be useful for marker-assisted selection and pyramiding but will also accelerate the fine mapping and cloning of the candidate genes associated with abiotic stress-tolerance mechanisms in rice.
Collapse
Affiliation(s)
- Luomiao Yang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Lei Lei
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - HuaLong Liu
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Jingguo Wang
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Hongliang Zheng
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China
| | - Detang Zou
- Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin, China.
| |
Collapse
|
19
|
Wu M, Liu R, Gao Y, Xiong R, Shi Y, Xiang Y. PheASR2, a novel stress-responsive transcription factor from moso bamboo (Phyllostachys edulis), enhances drought tolerance in transgenic rice via increased sensitivity to abscisic acid. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 154:184-194. [PMID: 32563042 DOI: 10.1016/j.plaphy.2020.06.014] [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: 03/30/2020] [Revised: 06/09/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
Abscisic acid, stress and ripening (ASR) transcription factors comprise a small family of proteins that play a key role in stress responses in plants. ASR genes involved in drought tolerance in moso bamboo (Phyllostachys edulis) are largely unknown. In our study, an ASR gene, PheASR2, was isolated and characterized. The expression of PheASR2 was up-regulated under various abiotic stresses, including drought, salt and abscisic acid (ABA). PheASR2 was localized in the nucleus in tobacco cells, and displayed transactivation activity in yeast. Ectopic expression of PheASR2 in rice conferred enhanced tolerance to drought stress, as determined through physiological analyses of germination rate, plant height, water loss and survival rate. The PheASR2-overexpressing transgenic plants showed an increase in reactive oxygen species (ROS), electrolyte leakage and malondialdehyde levels, reduced enzyme (CAT and SOD) activities, and higher expression of genes encoding ROS-scavenging enzymes. Consequently, the transgenic plants exhibited increased tolerance to oxidative stress compared with wild-type plants. Moreover, following ABA treatment, the seed germination rate and plant height of the PheASR2-overexpressing lines were inhibited, and stomatal closure was reduced. The expression of marker genes, including, OsAREB, OsP5CS1, OsLEA, and OsNCED2, was up-regulated in the PheASR2-overexpressing lines when subjected to drought treatment. Together, these results indicate that PheASR2 functions in drought stress tolerance through ABA signaling.
Collapse
Affiliation(s)
- Min Wu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Rui Liu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Yameng Gao
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China
| | - Rui Xiong
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Yanan Shi
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China; National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China.
| |
Collapse
|
20
|
Characterization of ASR gene and its role in drought tolerance in chickpea (Cicer arietinum L.). PLoS One 2020; 15:e0234550. [PMID: 32663226 PMCID: PMC7360048 DOI: 10.1371/journal.pone.0234550] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 05/28/2020] [Indexed: 02/06/2023] Open
Abstract
Chickpea has a profound nutritional and economic value in vegetarian society. Continuous decline in chickpea productivity is attributed to insufficient genetic variability and different environmental stresses. Chickpea like several other legumes is highly susceptible to terminal drought stress. Multiple genes control drought tolerance and ASR gene plays a key role in regulating different plant stresses. The present study describes the molecular characterization and functional role of Abscissic acid and stress ripening (ASR) gene from chickpea (Cicer arietinum) and the gene sequence identified was submitted to NCBI Genbank (MK937569). Molecular analysis using MUSCLE software proved that the ASR nucleotide sequences in different legumes show variations at various positions though ASR genes are conserved in chickpea with only few variations. Sequence similarity of ASR gene to chickpea putative ABA/WDS induced protein mRNA clearly indicated its potential involvement in drought tolerance. Physiological screening and qRT-PCR results demonstrated increased ASR gene expression under drought stress possibly enabled genotypes to perform better under stress. Conserved domain search, protein structure analysis, prediction and validation, network analysis using Phyre2, Swiss-PDB viewer, ProSA and STRING analysis established the role of hypothetical ASR protein NP_001351739.1 in mediating drought responses. NP_001351739.1 might have enhanced the ASR gene activity as a transcription factor regulating drought stress tolerance in chickpea. This study could be useful in identification of new ASR genes that play a major role in drought tolerance and also develop functional markers for chickpea improvement.
Collapse
|
21
|
Genome-wide identification and abiotic stress response patterns of abscisic acid stress ripening protein family members in Triticum aestivum L. Genomics 2020; 112:3794-3802. [PMID: 32304713 DOI: 10.1016/j.ygeno.2020.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 02/06/2023]
Abstract
ASR (ABA-stress-ripening) genes play important roles in regulating plant growth and stress responses. This study identified 29 ASR genes in wheat. 23 pairs of tandem duplication genes and six pairs of segmental duplication genes were found in wheat ASR (TaASR) gene family, respectively. It is speculated that gene duplication event is the main driving force of TaASR genes evolution. Using published RNA-seq data and the qRT-PCR results of 12 TaASR genes, we analyzed the expression profiles for TaASR genes under abiotic stresses. It found that most of the genes mainly responded to salt and low temperature stress. Finally, subcellular localization and self-activation experiments showed that the proteins encoded by 12 TaASR genes were all located in the nucleus and cell membrane, and the full-length proteins had self-activation activity, which supported their role as transcription factors. This study provides a scientific basis for a comprehensive understanding of the TaASR gene family.
Collapse
|
22
|
Guo J, Li C, Zhang X, Li Y, Zhang D, Shi Y, Song Y, Li Y, Yang D, Wang T. Transcriptome and GWAS analyses reveal candidate gene for seminal root length of maize seedlings under drought stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 292:110380. [PMID: 32005385 DOI: 10.1016/j.plantsci.2019.110380] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 05/21/2023]
Abstract
Water deficits are a major constraint on maize growth and yield, and deep roots are one of the major mechanisms of drought tolerance. In this study, four root and shoot traits were evaluated within an association panel consisting of 209 diverse maize accessions under well-watered (WW) and water-stressed (WS) conditions. A significant positive correlation was observed between seminal root length (SRL) under WS treatment and the drought tolerance index (DI) of maize seedlings. The transcriptome profiles of maize seminal roots were compared between four drought-tolerant lines and four drought-sensitive lines under both water conditions to identify genes associated with the drought stress response. After drought stress, 343 and 177 common differentially expressed genes (DEGs) were identified in the drought-tolerant group and drought-sensitive group, respectively. In parallel, a coexpression network underlying SRL was constructed on the basis of transcriptome data, and 10 hub genes involved in two significant associated modules were identified. Additionally, a genome-wide association study (GWAS) of the SRL revealed 62 loci for the two water treatments. By integrating the results of the GWAS, the common DEGs and the coexpression network analysis, 7 promising candidate genes were prioritized for further research. Together, our results provide a foundation for the enhanced understanding of seminal root changes in response to drought stress in maize.
Collapse
Affiliation(s)
- Jian Guo
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - Chunhui Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
| | | | - Yongxiang Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dengfeng Zhang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yunsu Shi
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanchun Song
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yu Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Deguang Yang
- College of Agriculture, Northeast Agricultural University, Harbin, China.
| | - Tianyu Wang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
| |
Collapse
|
23
|
Park SI, Kim JJ, Shin SY, Kim YS, Yoon HS. ASR Enhances Environmental Stress Tolerance and Improves Grain Yield by Modulating Stomatal Closure in Rice. FRONTIERS IN PLANT SCIENCE 2020; 10:1752. [PMID: 32117337 PMCID: PMC7033646 DOI: 10.3389/fpls.2019.01752] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/13/2019] [Indexed: 05/24/2023]
Abstract
Abscisic acid-, stress-, and ripening-induced (ASR) genes are involved in responding to abiotic stresses, but their precise roles in enhancing grain yield under stress conditions remain to be determined. We cloned a rice (Oryza sativa) ASR gene, OsASR1, and characterized its function in rice plants. OsASR1 expression was induced by abscisic acid (ABA), salt, and drought treatments. Transgenic rice plants overexpressing OsASR1 displayed improved water regulation under salt and drought stresses, which was associated with osmolyte accumulation, improved modulation of stomatal closure, and reduced transpiration rates. OsASR1-overexpressing plants were hypersensitive to exogenous ABA and accumulated higher endogenous ABA levels under salt and drought stresses, indicating that OsASR1 is a positive regulator of the ABA signaling pathway. The growth of OsASR1-overexpressing plants was superior to that of wild-type (WT) plants under paddy field conditions when irrigation was withheld, likely due to improved modulation of stomatal closure via modified ABA signaling. The transgenic plants had higher grain yields than WT plants for four consecutive generations. We conclude that OsASR1 has a crucial role in ABA-mediated regulation of stomatal closure to conserve water under salt- and drought-stress conditions, and OsASR1 overexpression can enhance salinity and drought tolerance, resulting in improved crop yields.
Collapse
Affiliation(s)
- Seong-Im Park
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
| | - Jin-Ju Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
| | - Sun-Young Shin
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
| | - Young-Saeng Kim
- Research Institute for Dok-do and Ulleung-do, Kyungpook National University, Daegu, South Korea
| | - Ho-Sung Yoon
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
- Advanced Bio-Resource Research Center, Kyungpook National University, Daegu, South Korea
| |
Collapse
|
24
|
Liu YL, Shen ZJ, Simon M, Li H, Ma DN, Zhu XY, Zheng HL. Comparative Proteomic Analysis Reveals the Regulatory Effects of H 2S on Salt Tolerance of Mangrove Plant Kandelia obovata. Int J Mol Sci 2019; 21:ijms21010118. [PMID: 31878013 PMCID: PMC6981851 DOI: 10.3390/ijms21010118] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/17/2019] [Accepted: 12/19/2019] [Indexed: 12/27/2022] Open
Abstract
As a dominant mangrove species, Kandelia obovata is distributed in an intertidal marsh with an active H2S release. Whether H2S participates in the salt tolerance of mangrove plants is still ambiguous, although increasing evidence has demonstrated that H2S functions in plant responses to multiple abiotic stresses. In this study, NaHS was used as an H2S donor to investigate the regulatory mechanism of H2S on the salt tolerance of K. obovata seedlings by using a combined physiological and proteomic analysis. The results showed that the reduction in photosynthesis (Pn) caused by 400 mM of NaCl was recovered by the addition of NaHS (200 μM). Furthermore, the application of H2S enhanced the quantum efficiency of photosystem II (PSII) and the membrane lipid stability, implying that H2S is beneficial to the survival of K. obovata seedlings under high salinity. We further identified 37 differentially expressed proteins by proteomic approaches under salinity and NaHS treatments. Among them, the proteins that are related to photosynthesis, primary metabolism, stress response and hormone biosynthesis were primarily enriched. The physiological and proteomic results highlighted that exogenous H2S up-regulated photosynthesis and energy metabolism to help K. obovata to cope with high salinity. Specifically, H2S increased photosynthetic electron transfer, chlorophyll biosynthesis and carbon fixation in K. obovata leaves under salt stress. Furthermore, the abundances of other proteins related to the metabolic pathway, such as antioxidation (ascorbic acid peroxidase (APX), copper/zinc superoxide dismutase (CSD2), and pancreatic and duodenal homeobox 1 (PDX1)), protein synthesis (heat-shock protein (HSP), chaperonin family protein (Cpn) 20), nitrogen metabolism (glutamine synthetase 1 and 2 (GS2), GS1:1), glycolysis (phosphoglycerate kinase (PGK) and triosephosphate isomerase (TPI)), and the ascorbate–glutathione (AsA–GSH) cycle were increased by H2S under high salinity. These findings provide new insights into the roles of H2S in the adaptations of the K. obovata mangrove plant to high salinity environments.
Collapse
|
25
|
Agarwal P, Singh PC, Chaudhry V, Shirke PA, Chakrabarty D, Farooqui A, Nautiyal CS, Sane AP, Sane VA. PGPR-induced OsASR6 improves plant growth and yield by altering root auxin sensitivity and the xylem structure in transgenic Arabidopsis thaliana. JOURNAL OF PLANT PHYSIOLOGY 2019; 240:153010. [PMID: 31352021 DOI: 10.1016/j.jplph.2019.153010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 05/02/2023]
Abstract
Plant-growth-promoting rhizobacteria (PGPR) improve plant growth by altering the root architecture, although the mechanisms underlying this alteration have yet to be unravelled. Through microarray analysis of PGPR-treated rice roots, a large number of differentially regulated genes were identified. Ectopic expression of one of these genes, OsASR6 (ABA STRESS RIPENING6), had a remarkable effect on plant growth in Arabidopsis. Transgenic lines over-expressing OsASR6 had larger leaves, taller inflorescence bolts and greater numbers of siliques and seeds. The most prominent effect was observed in root growth, with the root biomass increasing four-fold compared with the shoot biomass increase of 1.7-fold. Transgenic OsASR6 over-expressing plants showed higher conductance, transpiration and photosynthesis rates, leading to an ˜30% higher seed yield compared with the control. Interestingly, OsASR6 expression led to alterations in the xylem structure, an increase in the xylem vessel size and altered lignification, which correlated with higher conductance. OsASR6 is activated by auxin and, in turn, increases auxin responses and root auxin sensitivity, as observed by the increased expression of auxin-responsive genes, such as SAUR32 and PINOID, and the key auxin transcription factor, ARF5. Collectively, these phenomena led to an increased root density. The effects of OsASR6 expression largely mimic the beneficial effects of PGPRs in rice, indicating that OsASR6 activation may be a key factor governing PGPR-mediated changes in rice. OsASR6 is a potential candidate for the manipulation of rice for improved productivity.
Collapse
Affiliation(s)
- Pallavi Agarwal
- Plant Gene Expression Lab, CSIR- National Botanical Research Institute, Lucknow, 226001, India; Integral University, Lucknow, India
| | - Poonam C Singh
- Microbiology Division, CSIR- National Botanical Research Institute, Lucknow, 226001, India
| | - Vasvi Chaudhry
- Microbiology Division, CSIR- National Botanical Research Institute, Lucknow, 226001, India
| | - Pramod A Shirke
- Plant Physiology, CSIR- National Botanical Research Institute, Lucknow, 226001, India
| | - Debasis Chakrabarty
- Genetics and Molecular Biology Division, CSIR- National Botanical Research Institute, Lucknow-226001, India
| | | | | | - Aniruddha P Sane
- Plant Gene Expression Lab, CSIR- National Botanical Research Institute, Lucknow, 226001, India
| | - Vidhu A Sane
- Plant Gene Expression Lab, CSIR- National Botanical Research Institute, Lucknow, 226001, India.
| |
Collapse
|
26
|
Joo J, Choi DH, Lee YH, Seo HS, Song SI. The rice SUMO conjugating enzymes OsSCE1 and OsSCE3 have opposing effects on drought stress. JOURNAL OF PLANT PHYSIOLOGY 2019; 240:152993. [PMID: 31212102 DOI: 10.1016/j.jplph.2019.152993] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 03/18/2019] [Accepted: 06/08/2019] [Indexed: 05/16/2023]
Abstract
Posttranslational modification of proteins by the small ubiquitin-related modifier (SUMO) protein is involved in diverse cellular processes. In sumoylation, SUMO-conjugating enzyme (SCE) conjugates SUMO to substrate proteins. Similarly to yeast and animals, Arabidopsis encodes a single SCE gene, but other plants encode at least two SCE genes. In this study, we report the molecular characterization of three Oryza sativa SCE genes. Their levels of expression are commonly upregulated by drought stress but are differentially regulated by hormones and sugars. Only the OsSCE1 gene showed photoperiod- and light-dependent diurnal oscillations in the leaves. Yeast two-hybrid assays showed that OsSCEs do not show SUMO isoform specificity. Three rice OsSCE proteins localize primarily to the nucleus. Interestingly, OsSCE1 is distributed in specific parts of the nucleus and shows sumoylation activities in the absence of a SUMO ligase in E. coli. In addition, overexpression of the OsSCE1 gene alters the biomass and grain yield parameters in transgenic rice plants. Overexpression of the OsSCE3 gene in transgenic rice plants enhances drought stress tolerance. In contrast, OsSCE1-OX transgenic rice plants are hypersensitive to drought stress. Our results suggest that these genes may be involved in different cellular processes.
Collapse
Affiliation(s)
- Joungsu Joo
- Department of Bioscience and Bioinformatics, Myongji University, Yongin, 17058, Republic of Korea
| | - Dong Hee Choi
- Department of Bioscience and Bioinformatics, Myongji University, Yongin, 17058, Republic of Korea
| | - Youn Hab Lee
- Department of Bioscience and Bioinformatics, Myongji University, Yongin, 17058, Republic of Korea
| | - Hak Soo Seo
- Department of Plant Science, Seoul National University, Seoul, 00826, Republic of Korea
| | - Sang Ik Song
- Department of Bioscience and Bioinformatics, Myongji University, Yongin, 17058, Republic of Korea.
| |
Collapse
|
27
|
Yoon JS, Kim JY, Lee MB, Seo YW. Over-expression of the Brachypodium ASR gene, BdASR4, enhances drought tolerance in Brachypodium distachyon. PLANT CELL REPORTS 2019; 38:1109-1125. [PMID: 31134348 DOI: 10.1007/s00299-019-02429-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/21/2019] [Indexed: 05/13/2023]
Abstract
BdASR4 expression was up-regulated during abiotic stress and hormone treatments. Plants over-expressing BdASR4 improved drought tolerant. BdASR4 may regulate antioxidant activities and transcript levels of stress-related and abscisic acid-responsive genes. Abiotic stress conditions negatively affect plant growth and developmental processes, causing a reduction in crop productivity. The abscisic acid-, stress-, ripening-induced (ASR) proteins play important roles in the protection of plants from abiotic stress. Brachypodium distachyon L. is a well-studied monocot model plant. However, ASR proteins of Brachypodium have not been widely studied. In this study, five ASR genes of Brachypodium plant were cloned and characterized. The BdASR genes were expressed in response to various abiotic stresses and hormones. In particular, BdASR4 was shown to encode a protein containing a nuclear localization signal in its C-terminal region, which enabled protein localization in the nucleus. To further examine functions of BdASR4, transgenic Brachypodium plants harboring BdASR4 were generated. Over-expression of BdASR4 was associated with strong drought tolerance, and plants over-expressing BdASR4 preserved more water and displayed higher antioxidant enzyme activities than did the wild-type plants. The transcript levels of stress-responsive genes, reactive oxygen species scavenger-associated genes, and abscisic acid-responsive genes tended to be higher in transgenic plants than in WT plants. Moreover, plants over-expressing BdASR4 were hypersensitive to exogenous abscisic acid at the germination stage. Taken together, these findings suggest multiple roles for BdASR4 in the plant response to drought stress by regulating antioxidant enzymes and the transcription of stress- and abscisic acid-responsive genes.
Collapse
Affiliation(s)
- Jin Seok Yoon
- Department of Biosystems and Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Jae Yoon Kim
- Department of Biosystems and Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea
- Department of Plant Resources, Kongju National University, Yesan, Chungnam, 32439, Republic of Korea
| | - Man Bo Lee
- Department of Biosystems and Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea
| | - Yong Weon Seo
- Department of Biosystems and Biotechnology, Korea University, Seongbuk-Gu, Seoul, 02841, Republic of Korea.
| |
Collapse
|
28
|
Woodhouse MR, Hufford MB. Parallelism and convergence in post-domestication adaptation in cereal grasses. Philos Trans R Soc Lond B Biol Sci 2019; 374:20180245. [PMID: 31154975 DOI: 10.1098/rstb.2018.0245] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The selection of desirable traits in crops during domestication has been well studied. Many crops share a suite of modified phenotypic characteristics collectively known as the domestication syndrome. In this sense, crops have convergently evolved. Previous work has demonstrated that, at least in some instances, convergence for domestication traits has been achieved through parallel molecular means. However, both demography and selection during domestication may have placed limits on evolutionary potential and reduced opportunities for convergent adaptation during post-domestication migration to new environments. Here we review current knowledge regarding trait convergence in the cereal grasses and consider whether the complexity and dynamism of cereal genomes (e.g., transposable elements, polyploidy, genome size) helped these species overcome potential limitations owing to domestication and achieve broad subsequent adaptation, in many cases through parallel means. This article is part of the theme issue 'Convergent evolution in the genomics era: new insights and directions'.
Collapse
Affiliation(s)
- M R Woodhouse
- Iowa State University, Ecology, Evolution, and Organismal Biology , Ames, IA 50011 , USA
| | - M B Hufford
- Iowa State University, Ecology, Evolution, and Organismal Biology , Ames, IA 50011 , USA
| |
Collapse
|
29
|
Benny J, Pisciotta A, Caruso T, Martinelli F. Identification of key genes and its chromosome regions linked to drought responses in leaves across different crops through meta-analysis of RNA-Seq data. BMC PLANT BIOLOGY 2019; 19:194. [PMID: 31077147 PMCID: PMC6511156 DOI: 10.1186/s12870-019-1794-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 04/22/2019] [Indexed: 05/08/2023]
Abstract
BACKGROUND Our study is the first to provide RNA-Seq data analysis related to transcriptomic responses towards drought across different crops. The aim was to identify and map which genes play a key role in drought response on leaves across different crops. Forty-two RNA-seq samples were analyzed from 9 published studies in 7 plant species (Arabidopsis thaliana, Solanum lycopersicum, Zea mays, Vitis vinifera, Malus X domestica, Solanum tuberosum, Triticum aestivum). RESULTS Twenty-seven (16 up-regulated and 11 down-regulated) drought-regulated genes were commonly present in at least 7 of 9 studies, while 351 (147 up-regulated and 204 down-regulated) were commonly drought-regulated in 6 of 9 studies. Across all kind of leaves, the drought repressed gene-ontologies were related to the cell wall and membrane re-structuring such as wax biosynthesis, cell wall organization, fatty acid biosynthesis. On the other hand, drought-up-regulated biological processes were related to responses to osmotic stress, abscisic acid, water deprivation, abscisic-activated signalling pathway, salt stress, hydrogen peroxide treatment. A common metabolic feature linked to drought response in leaves is the repression of terpenoid pathways. There was an induction of AL1 (alfin-like), UGKYAH (trihelix), WRKY20, homeobox genes and members of the SET domain family in 6 of 9 studies. Several genes involved in detoxifying and antioxidant reactions, signalling pathways and cell protection were commonly modulated by drought across the 7 species. The chromosome (Chr) mapping of these key abiotic stress genes highlighted that Chr 4 in Arabidopsis thaliana, Chr 1 in Zea mays, Chr 2 and Chr 5 in Triticum aestivum contained a higher presence of drought-related genes compared to the other remaining chromosomes. In seedling studies, it is worth notice the up-regulation of ERF4 and ESE3 (ethylene), HVA22 (abscisic acid), TIR1 (auxin) and some transcription factors (MYB3, MYB94, MYB1, WRKY53 and WRKY20). In mature leaves, ERF1 and Alfin-like 1 were induced by drought while other transcription factors (YABBY5, ARR2, TRFL2) and genes involved phospholipid biosynthesis were repressed. CONCLUSIONS The identified and mapped genes might be potential targets of molecular breeding activities to develop cultivars with enhanced drought resistance and tolerance across different crops.
Collapse
Affiliation(s)
- Jubina Benny
- Dipartimento di Biologia, Università degli Studi di Firenze, Via Madonna del Piano 6, Sesto Fiorentino, FI 50019 Italy
| | - Antonino Pisciotta
- Dipartimento di Biologia, Università degli Studi di Firenze, Via Madonna del Piano 6, Sesto Fiorentino, FI 50019 Italy
| | - Tiziano Caruso
- Dipartimento di Biologia, Università degli Studi di Firenze, Via Madonna del Piano 6, Sesto Fiorentino, FI 50019 Italy
| | - Federico Martinelli
- Dipartimento di Biologia, Università degli Studi di Firenze, Via Madonna del Piano 6, Sesto Fiorentino, FI 50019 Italy
| |
Collapse
|
30
|
Liang Y, Jiang Y, Du M, Li B, Chen L, Chen M, Jin D, Wu J. ZmASR3 from the Maize ASR Gene Family Positively Regulates Drought Tolerance in Transgenic Arabidopsis. Int J Mol Sci 2019; 20:E2278. [PMID: 31072025 PMCID: PMC6539908 DOI: 10.3390/ijms20092278] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/04/2019] [Accepted: 05/06/2019] [Indexed: 01/08/2023] Open
Abstract
Abscisic acid (ABA)-, stress-, and ripening-induced (ASR) proteins are reported to be involved in drought stress responses. However, the function of maize ASR genes in enhancing drought tolerance is not known. Here, nine maize ASR members were cloned, and the molecular features of these genes were analyzed. Phenotype results of overexpression of maize ZmASR3 gene in Arabidopsis showed lower malondialdehyde (MDA) levels and higher relative water content (RWC) and proline content than the wild type under drought conditions, demonstrating that ZmASR3 can improve drought tolerance. Further experiments showed that ZmASR3-overexpressing transgenic lines displayed increased stomatal closure and reduced reactive oxygen species (ROS) accumulation by increasing the enzyme activities of superoxide dismutase (SOD) and catalase (CAT) under drought conditions. Moreover, overexpression of ZmASR3 in Arabidopsis increased ABA content and reduced sensitivity to exogenous ABA in both the germination and post-germination stages. In addition, the ROS-related, stress-responsive, and ABA-dependent pathway genes were activated in transgenic lines under drought stress. Taken together, these results suggest that ZmASR3 acts as a positive regulator of drought tolerance in plants.
Collapse
Affiliation(s)
- Yani Liang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Yingli Jiang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Ming Du
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Baoyan Li
- Institute of Plant Protection, Yantai Academy of Agricultural Sciences, Yantai 265500, China.
| | - Long Chen
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Mingchao Chen
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Demiao Jin
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Jiandong Wu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| |
Collapse
|
31
|
Joo J, Lee YH, Song SI. OsbZIP42 is a positive regulator of ABA signaling and confers drought tolerance to rice. PLANTA 2019; 249:1521-1533. [PMID: 30712129 DOI: 10.1007/s00425-019-03104-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/30/2019] [Indexed: 05/21/2023]
Abstract
OsbZIP42 is a positive regulator of ABA signaling and drought stress tolerance. The activation of OsbZIP42 depends on stress-/ABA-activated protein kinase 4 (SAPK4) and an additional ABA-dependent modification of OsbZIP42. Basic leucine zipper transcription factors (bZIP TFs) play important roles in the ABA signaling pathway in plants. Rice OsbZIP42 is a member of the group E bZIP, which is an ortholog of Arabidopsis group A bZIP. This latter group includes abscisic acid-responsive element (ABRE)-binding factors (ABFs) involved in abiotic stress tolerance. The expression of OsbZIP42 was induced by ABA treatment, although it was not induced by drought and salt stresses. Unlike other bZIP TFs, OsbZIP42 contained two transcriptional activation domains. Although the full-length OsbZIP42 protein did not, the N-terminus of the protein interacted with SAPK4. Our results suggest that the activation of OsbZIP42 by SAPK4 requires another ABA-dependent modification of OsbZIP42. Transgenic rice overexpressing OsbZIP42 (OsbZIP42-OX) exhibited a rapidly elevated expression of the ABA-responsive LEA3 and Rab16 genes and was hypersensitive to ABA. Analyses of the OsbZIP42-OX plants revealed enhanced tolerance to drought stress. These results suggest that OsbZIP42 is a positive regulator of ABA signaling and drought stress tolerance depending on its activation, which is followed by an additional ABA-dependent modification. We propose that OsbZIP42 is an important player in rice for conferring ABA-dependent drought tolerance.
Collapse
Affiliation(s)
- Joungsu Joo
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, 449-728, Korea
| | - Youn Hab Lee
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, 449-728, Korea
| | - Sang Ik Song
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, 449-728, Korea.
| |
Collapse
|
32
|
Stein RJ, Duarte GL, Scheunemann L, Spohr MG, de Araújo Júnior AT, Ricachenevsky FK, Rosa LMG, Zanchin NIT, dos Santos RP, Fett JP. Genotype Variation in Rice ( Oryza sativa L.) Tolerance to Fe Toxicity Might Be Linked to Root Cell Wall Lignification. FRONTIERS IN PLANT SCIENCE 2019; 10:746. [PMID: 31244872 PMCID: PMC6581717 DOI: 10.3389/fpls.2019.00746] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/21/2019] [Indexed: 05/09/2023]
Abstract
Iron (Fe) is an essential element to plants, but can be harmful if accumulated to toxic concentrations. Fe toxicity can be a major nutritional disorder in rice (Oryza sativa) when cultivated under waterlogged conditions, as a result of excessive Fe solubilization of in the soil. However, little is known about the basis of Fe toxicity and tolerance at both physiological and molecular level. To identify mechanisms and potential candidate genes for Fe tolerance in rice, we comparatively analyzed the effects of excess Fe on two cultivars with distinct tolerance to Fe toxicity, EPAGRI 108 (tolerant) and BR-IRGA 409 (susceptible). After excess Fe treatment, BR-IRGA 409 plants showed reduced biomass and photosynthetic parameters, compared to EPAGRI 108. EPAGRI 108 plants accumulated lower amounts of Fe in both shoots and roots compared to BR-IRGA 409. We conducted transcriptomic analyses of roots from susceptible and tolerant plants under control and excess Fe conditions. We found 423 up-regulated and 92 down-regulated genes in the susceptible cultivar, and 42 up-regulated and 305 down-regulated genes in the tolerant one. We observed striking differences in root gene expression profiles following exposure to excess Fe: the two cultivars showed no genes regulated in the same way (up or down in both), and 264 genes were oppositely regulated in both cultivars. Plants from the susceptible cultivar showed down-regulation of known Fe uptake-related genes, indicating that plants are actively decreasing Fe acquisition. On the other hand, plants from the tolerant cultivar showed up-regulation of genes involved in root cell wall biosynthesis and lignification. We confirmed that the tolerant cultivar has increased lignification in the outer layers of the cortex and in the vascular bundle compared to the susceptible cultivar, suggesting that the capacity to avoid excessive Fe uptake could rely in root cell wall remodeling. Moreover, we showed that increased lignin concentrations in roots might be linked to Fe tolerance in other rice cultivars, suggesting that a similar mechanism might operate in multiple genotypes. Our results indicate that changes in root cell wall and Fe permeability might be related to Fe toxicity tolerance in rice natural variation.
Collapse
Affiliation(s)
| | | | - Lívia Scheunemann
- Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Marta Gomes Spohr
- Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Luis Mauro Gonçalves Rosa
- Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | | | - Janette Palma Fett
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- *Correspondence: Janette Palma Fett,
| |
Collapse
|
33
|
Comprehensive Analysis of the Cadmium Tolerance of Abscisic Acid-, Stress- and Ripening-Induced Proteins (ASRs) in Maize. Int J Mol Sci 2019; 20:ijms20010133. [PMID: 30609672 PMCID: PMC6337223 DOI: 10.3390/ijms20010133] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 12/21/2018] [Accepted: 12/25/2018] [Indexed: 01/07/2023] Open
Abstract
In plants, abscisic acid-, stress-, and ripening-induced (ASR) proteins have been shown to impart tolerance to multiple abiotic stresses such as drought and salinity. However, their roles in metal stress tolerance are poorly understood. To screen plant Cd-tolerance genes, the yeast-based gene hunting method which aimed to screen Cd-tolerance colonies from maize leaf cDNA library hosted in yeast was carried out. Here, maize ZmASR1 was identified to be putative Cd-tolerant through this survival screening strategy. In silico analysis of the functional domain organization, phylogenetic classification and tissue-specific expression patterns revealed that maize ASR1 to ASR5 are typical ASRs with considerable expression in leaves. Further, four of them were cloned for testifying Cd tolerance using yeast complementation assay. The results indicated that they all confer Cd tolerance in Cd-sensitive yeast. Then they were transiently expressed in tobacco leaves for subcellular localization analysis and for Cd-challenged lesion assay, continuously. The results demonstrated that all 4 maize ASRs tested are localized to the cell nucleus and cytoplasm in tobacco leaves. Moreover, they were confirmed to be Cd-tolerance genes in planta through lesion analysis in Cd-infiltrated leaves transiently expressing them. Taken together, our results demonstrate that maize ASRs play important roles in Cd tolerance, and they could be used as promising candidate genes for further functional studies toward improving the Cd tolerance in plants.
Collapse
|
34
|
Kumar A, Batra R, Gahlaut V, Gautam T, Kumar S, Sharma M, Tyagi S, Singh KP, Balyan HS, Pandey R, Gupta PK. Genome-wide identification and characterization of gene family for RWP-RK transcription factors in wheat (Triticum aestivum L.). PLoS One 2018; 13:e0208409. [PMID: 30540790 PMCID: PMC6291158 DOI: 10.1371/journal.pone.0208409] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 11/17/2018] [Indexed: 02/07/2023] Open
Abstract
RWP-RKs represent a small family of transcription factors (TFs) that are unique to plants and function particularly under conditions of nitrogen starvation. These RWP-RKs have been classified in two sub-families, NLPs (NIN-like proteins) and RKDs (RWP-RK domain proteins). NLPs regulate tissue-specific expression of genes involved in nitrogen use efficiency (NUE) and RKDs regulate expression of genes involved in gametogenesis/embryogenesis. During the present study, using in silico approach, 37 wheat RWP-RK genes were identified, which included 18 TaNLPs (2865 to 7340 bp with 4/5 exons), distributed on 15 chromosomes from 5 homoeologous groups (with two genes each on 4B,4D and 5A) and 19 TaRKDs (1064 to 5768 bp with 1 to 6 exons) distributed on 12 chromosomes from 4 homoeologous groups (except groups 1, 4 and 5); 2–3 splice variants were also available in 9 of the 37 genes. Sixteen (16) of these genes also carried 24 SSRs (simple sequence repeats), while 11 genes had targets for 13 different miRNAs. At the protein level, MD simulation analysis suggested their interaction with nitrate-ions. Significant differences were observed in the expression of only two (TaNLP1 and TaNLP2) of the nine representative genes that were used for in silico expression analysis under varying levels of N at post-anthesis stage (data for other genes was not available for in silico expression analysis). Differences in expression were also observed during qRT-PCR, when expression of four representative genes (TaNLP2, TaNLP7, TaRKD6 and TaRKD9) was examined in roots and shoots of seedlings (under different conditions of N supply) in two contrasting genotypes which differed in NUE (C306 with low NUE and HUW468 with high NUE). These four genes for qRT-PCR were selected on the basis of previous literature, level of homology and the level of expression (in silico study). In particular, the TaNLP7 gene showed significant up-regulation in the roots and shoots of HUW468 (with higher NUE) during N-starvation; this gene has already been characterized in Arabidopsis and tobacco, and is known to be involved in nitrate-signal transduction pathway.
Collapse
Affiliation(s)
- Anuj Kumar
- Advance Center for Computational & Applied Biotechnology, Uttarakhand Council for Biotechnology (UCB), Dehradun, India
| | - Ritu Batra
- Department of Genetics and Plant Breeding, CCS University, Meerut, India
| | - Vijay Gahlaut
- Department of Plant Molecular Biology, South Campus, University of Delhi, Delhi, India
| | - Tinku Gautam
- Department of Genetics and Plant Breeding, CCS University, Meerut, India
| | - Sanjay Kumar
- Bioinformatics Centre, Biotech Park, Lucknow, India
| | - Mansi Sharma
- ICMR- National Institute of Cancer Prevention and Research, Noida, India
| | - Sandhya Tyagi
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Krishna Pal Singh
- Advance Center for Computational & Applied Biotechnology, Uttarakhand Council for Biotechnology (UCB), Dehradun, India
- Ch. Charan Singh Haryana Agricultural University, Hisar, India
| | | | - Renu Pandey
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | | |
Collapse
|
35
|
Sharma C, Kumar S, Saripalli G, Jain N, Raghuvanshi S, Sharma JB, Prabhu KV, Sharma PK, Balyan HS, Gupta PK. H3K4/K9 acetylation and Lr28-mediated expression of six leaf rust responsive genes in wheat (Triticum aestivum). Mol Genet Genomics 2018; 294:227-241. [PMID: 30298213 DOI: 10.1007/s00438-018-1500-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/28/2018] [Indexed: 10/28/2022]
Abstract
Development of leaf rust-resistant cultivars is a priority during wheat breeding, since leaf rust causes major losses in yield. Resistance against leaf rust due to Lr genes is partly controlled by epigenetic modifications including histone acetylation that is known to respond to biotic/abiotic stresses. In the present study, enrichment of H3K4ac and H3K9ac in promoters of six defense responsive genes (N-acetyltransferase, WRKY 40, WRKY 70, ASR1, Peroxidase 12 and Sarcosine oxidase) was compared with their expression in a pair of near-isogenic lines (NILs) for the gene Lr28 following inoculation with leaf rust pathotype '77-5'; ChIP-qPCR was used for this purpose. The proximal and distal promoters of these genes contained a number of motifs that are known to respond to biotic stresses. The enrichment of two acetylation marks changed with passage of time; changes in expression of two of the six genes (N-acetyltransferase and peroxidase12), largely matched with changes in H3K4/H3K9 acetylation patterns of the two promoter regions. For example, enrichment of both the marks matched with higher expression of N-acetyltransferase gene in susceptible NIL and the deacetylation (H3K4ac) largely matched with reduced gene expression in resistant NIL. In peroxidase12, enrichment of H3K4ac and H3K9ac largely matched with higher expression in both the NILs. In the remaining four genes, changes in H3 acetylation did not always match with gene expression levels. This indicated complexity in the regulation of the expression of these remaining four genes, which may be controlled by other epigenetic/genetic regulatory mechanisms that need further analysis.
Collapse
Affiliation(s)
- Chanchal Sharma
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India.,Department of Biotechnology, College of Engineering, Daegu University, Gyeongsan, Gyeongbuk, 38453, South Korea
| | - Santosh Kumar
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, 110021, India
| | - Gautam Saripalli
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India
| | - Neelu Jain
- Division of Genetics, ICAR-Indian Agricultural Research Institute (IARI), Pusa, New Delhi, 110022, India
| | - Saurabh Raghuvanshi
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, 110021, India
| | - J B Sharma
- Division of Genetics, ICAR-Indian Agricultural Research Institute (IARI), Pusa, New Delhi, 110022, India
| | - K V Prabhu
- Division of Genetics, ICAR-Indian Agricultural Research Institute (IARI), Pusa, New Delhi, 110022, India
| | - P K Sharma
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India
| | - H S Balyan
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India
| | - P K Gupta
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, 250004, India.
| |
Collapse
|
36
|
Wang B, Lv XQ, He L, Zhao Q, Xu MS, Zhang L, Jia Y, Zhang F, Liu FL, Liu QL. Whole-Transcriptome Sequence Analysis of Verbena bonariensis in Response to Drought Stress. Int J Mol Sci 2018; 19:E1751. [PMID: 29899256 PMCID: PMC6032440 DOI: 10.3390/ijms19061751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/05/2018] [Accepted: 06/08/2018] [Indexed: 11/16/2022] Open
Abstract
Drought is an important abiotic factor that threatens the growth and development of plants. Verbena bonariensis is a widely used landscape plant with a very high ornamental value. We found that Verbena has drought tolerance in production practice, so in order to delve into its mechanism of drought resistance and screen out its drought-resistance genes, we used the RNA-Seq platform to perform a de novo transcriptome assembly to analyze Verbena transcription response to drought stress. By high-throughput sequencing with Illumina Hiseq Xten, a total of 44.59 Gb clean data was obtained from T01 (control group) and T02 (drought experiment group). After assembly, 111,313 unigenes were obtained, and 53,757 of them were annotated by compared databases. In this study, 4829 differentially expressed genes were obtained, of which 4165 were annotated. We performed GO (Gene Ontology) and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathway enrichment analyses, and explored a lot of differently expressed genes related to plant energy production, hormone synthesis, cell signal transduction, and metabolism to understand the stress response of Verbena in drought stress. In addition, we also found that a series of TFs related to drought-resistance of Verbena and provide excellent genetic resources for improving the drought tolerance of crops.
Collapse
Affiliation(s)
- Bei Wang
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Xue-Qi Lv
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Ling He
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Qian Zhao
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Mao-Sheng Xu
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Lei Zhang
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Yin Jia
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Fan Zhang
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| | - Feng-Luan Liu
- Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, The Chinese Academy of Science, Shanghai Chenshan Botanical Garden, 3888 Huagong Road, Songjiang District, Shanghai 201602, China.
| | - Qing-Lin Liu
- Department of Ornamental Horticulture, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu 611130, Sichuan, China.
| |
Collapse
|
37
|
Li N, Wei S, Chen J, Yang F, Kong L, Chen C, Ding X, Chu Z. OsASR2 regulates the expression of a defence-related gene, Os2H16, by targeting the GT-1 cis-element. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:771-783. [PMID: 28869785 PMCID: PMC5814579 DOI: 10.1111/pbi.12827] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 08/23/2017] [Indexed: 05/11/2023]
Abstract
The GT-1 cis-element widely exists in many plant gene promoters. However, the molecular mechanism that underlies the response of the GT-1 cis-element to abiotic and biotic stresses remains elusive in rice. We previously isolated a rice short-chain peptide-encoding gene, Os2H16, and demonstrated that it plays important roles in both disease resistance and drought tolerance. Here, we conducted a promoter assay of Os2H16 and identified GT-1 as an important cis-element that mediates Os2H16 expression in response to pathogen attack and osmotic stress. Using the repeated GT-1 as bait, we characterized an abscisic acid, stress and ripening 2 (ASR2) protein from yeast-one hybridization screening. Sequence alignments showed that the carboxy-terminal domain of OsASR2 containing residues 80-138 was the DNA-binding domain. Furthermore, we identified that OsASR2 was specifically bound to GT-1 and activated the expression of the target gene Os2H16, as well as GFP driven by the chimeric promoter of 2 × GT-1-35S mini construct. Additionally, the expression of OsASR2 was elevated by pathogens and osmotic stress challenges. Overexpression of OsASR2 enhanced the resistance against Xanthomonas oryzae pv. oryzae and Rhizoctonia solani, and tolerance to drought in rice. These results suggest that the interaction between OsASR2 and GT-1 plays an important role in the crosstalk of the response of rice to biotic and abiotic stresses.
Collapse
Affiliation(s)
- Ning Li
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTaianShandongChina
| | - Shutong Wei
- Shandong Provincial Key Laboratory for Biology of Vegetable Disease and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaianShandongChina
| | - Jing Chen
- Shandong Provincial Key Laboratory for Biology of Vegetable Disease and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaianShandongChina
| | - Fangfang Yang
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTaianShandongChina
| | - Lingguang Kong
- Shandong Provincial Key Laboratory for Biology of Vegetable Disease and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaianShandongChina
| | - Cuixia Chen
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTaianShandongChina
| | - Xinhua Ding
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTaianShandongChina
- Shandong Provincial Key Laboratory for Biology of Vegetable Disease and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaianShandongChina
| | - Zhaohui Chu
- State Key Laboratory of Crop BiologyCollege of AgronomyShandong Agricultural UniversityTaianShandongChina
| |
Collapse
|
38
|
Zhong M, Li S, Huang F, Qiu J, Zhang J, Sheng Z, Tang S, Wei X, Hu P. The Phosphoproteomic Response of Rice Seedlings to Cadmium Stress. Int J Mol Sci 2017; 18:ijms18102055. [PMID: 28953215 PMCID: PMC5666737 DOI: 10.3390/ijms18102055] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 09/19/2017] [Accepted: 09/22/2017] [Indexed: 01/16/2023] Open
Abstract
The environmental damage caused by cadmium (Cd) pollution is of increasing concern in China. While the overall plant response to Cd has been investigated in some depth, the contribution (if any) of protein phosphorylation to the detoxification of Cd and the expression of tolerance is uncertain. Here, the molecular basis of the plant response has been explored in hydroponically raised rice seedlings exposed to 10 μΜ and 100 μΜ Cd2+ stress. An analysis of the seedlings’ quantitative phosphoproteome identified 2454 phosphosites, associated with 1244 proteins. A total of 482 of these proteins became differentially phosphorylated as a result of exposure to Cd stress; the number of proteins affected in this way was six times greater in the 100 μΜ Cd2+ treatment than in the 10 μΜ treatment. A functional analysis of the differentially phosphorylated proteins implied that a significant number was involved in signaling, in stress tolerance and in the neutralization of reactive oxygen species, while there was also a marked representation of transcription factors.
Collapse
Affiliation(s)
- Min Zhong
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
- College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China.
| | - Sanfeng Li
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Fenglin Huang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China.
| | - Jiehua Qiu
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Jian Zhang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Zhonghua Sheng
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Shaoqing Tang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Xiangjin Wei
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Peisong Hu
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| |
Collapse
|
39
|
Kim SW, Lee SK, Jeong HJ, An G, Jeon JS, Jung KH. Crosstalk between diurnal rhythm and water stress reveals an altered primary carbon flux into soluble sugars in drought-treated rice leaves. Sci Rep 2017; 7:8214. [PMID: 28811563 PMCID: PMC5557844 DOI: 10.1038/s41598-017-08473-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 06/30/2017] [Indexed: 12/13/2022] Open
Abstract
Plants retain rhythmic physiological responses when adapting to environmental challenges. However, possible integrations between drought conditions and those responses have not received much focus, especially regarding crop plants, and the relationship between abiotic stress and the diurnal cycle is generally not considered. Therefore, we conducted a genome-wide analysis to identify genes showing both diurnal regulation and water-deficiency response in rice (Oryza sativa). Among the 712 drought-responsive genes primary identified, 56.6% are diurnally expressed while 47.6% of the 761 that are down-regulated by drought are also diurnal. Using the β-glucuronidase reporter system and qRT-PCR analyses, we validated expression patterns of two candidate genes, thereby supporting the reliability of our transcriptome data. MapMan analysis indicated that diurnal genes up-regulated by drought are closely associated with the starch-sucrose pathway while those that are down-regulated are involved in photosynthesis. We then confirmed that starch-sucrose contents and chlorophyll fluorescence are altered in a diurnal manner under drought stress, suggesting these metabolic diurnal alterations as a novel indicator to evaluate the drought response in rice leaves. We constructed a functional gene network associated with the starch-sucrose KEGG metabolic pathway for further functional studies, and also developed a regulatory pathway model that includes OsbZIP23 transcription factor.
Collapse
Affiliation(s)
- Seo-Woo Kim
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Sang-Kyu Lee
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Hee-Jeong Jeong
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Gynheung An
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Jong-Seong Jeon
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea.
| | - Ki-Hong Jung
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea.
| |
Collapse
|
40
|
Zhang X, Jiang H, Wang H, Cui J, Wang J, Hu J, Guo L, Qian Q, Xue D. Transcriptome Analysis of Rice Seedling Roots in Response to Potassium Deficiency. Sci Rep 2017; 7:5523. [PMID: 28717149 PMCID: PMC5514036 DOI: 10.1038/s41598-017-05887-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/02/2017] [Indexed: 12/20/2022] Open
Abstract
Rice is one of the most important food crops in the world, and its growth, development, yield, and grain quality are susceptible to a deficiency of the macronutrient potassium (K+). The molecular mechanism for K+ deficiency tolerance remains poorly understood. In this study, K+ deficient conditions were employed to investigate the resulting changes in the transcriptome of rice seedling roots. Using ribonucleic acid sequencing (RNA-Seq) and analysis, a total of 805 differentially expressed genes were obtained, of which 536 genes were upregulated and 269 were downregulated. Gene functional classification showed that the expression of genes involved in nutrient transport, protein kinases, transcription processes, and plant hormones were particularly altered in the roots. Although these changes were significant, the expression of most genes remained constant even in K+-deficient conditions. Interestingly, when our RNA-Seq results were compared to public microarray data, we found that most of the genes that were differentially expressed in low K+ conditions also exhibited changes in expression in other environmental stress conditions.
Collapse
Affiliation(s)
- Xiaoqin Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Hua Jiang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Hua Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Zhejiang Academy of Agricultural Science, Hangzhou, China.,Institute of Crop Germplasm and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Jun Cui
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Jiahui Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Jiang Hu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Longbiao Guo
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Qian Qian
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China.
| | - Dawei Xue
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China.
| |
Collapse
|
41
|
Jiang W, Zhou S, Zhang Q, Song H, Zhou DX, Zhao Y. Transcriptional regulatory network of WOX11 is involved in the control of crown root development, cytokinin signals, and redox in rice. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:2787-2798. [PMID: 28830102 PMCID: PMC5853245 DOI: 10.1093/jxb/erx153] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The rice root system is mainly composed of post-embryonic shoot-borne roots called crown roots. WOX11, encoding a WUSCHEL-related homeobox domain transcription factor, is a key regulator of crown root growth and development in rice (Oryza sativa. L). In addition to specifically activating crown root development, WOX11 is also involved in lateral root initiation, root hair formation, and abiotic stresses. However, the gene regulatory network downstream of WOX11 remains largely unknown. Here, we studied the transcriptome of wox11 root tips by RNA-Seq and determined direct WOX11-binding targets by bioinformatic and biochemical analysis. The transcriptomic analysis revealed 664 differentially expressed genes, which covered a wide range of functions related to root development, cytokinin homeostasis/signaling, stress response, and redox metabolic processes. Bioinformatic analysis also revealed that the WOX11-binding motif was distributed over 41% (273/664) of the differentially expressed genes, and was mostly enriched in the promoter and intron regions. We used qRT-PCR and/or in situ hybridization to confirm co-expression of some of the WOX11-regulated genes in crown root development. We also used electrophoretic mobility shift assay and chromatin immunoprecipitation with anti-WOX11 antibody to validate direct regulation of these genes by WOX11. The analysis identified several genes that acted downstream of WOX11 in controlling crown root formation, cytokinin signaling, stress response, and redox metabolism. This work built a hierarchical regulatory model of WOX11 in rice crown root development.
Collapse
Affiliation(s)
- Wei Jiang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Shaoli Zhou
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Qian Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Huazhi Song
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
| | - Dao-Xiu Zhou
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Institute of Plant Sciences Paris-Saclay (IPS2), Université Paris-Saclay, Université Paris-Sud, Orsay, France
| | - Yu Zhao
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Correspondence:
| |
Collapse
|
42
|
Li J, Li Y, Yin Z, Jiang J, Zhang M, Guo X, Ye Z, Zhao Y, Xiong H, Zhang Z, Shao Y, Jiang C, Zhang H, An G, Paek N, Ali J, Li Z. OsASR5 enhances drought tolerance through a stomatal closure pathway associated with ABA and H 2 O 2 signalling in rice. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:183-196. [PMID: 27420922 PMCID: PMC5258865 DOI: 10.1111/pbi.12601] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/28/2016] [Accepted: 07/06/2016] [Indexed: 05/18/2023]
Abstract
Drought is one of the major abiotic stresses that directly implicate plant growth and crop productivity. Although many genes in response to drought stress have been identified, genetic improvement to drought resistance especially in food crops is showing relatively slow progress worldwide. Here, we reported the isolation of abscisic acid, stress and ripening (ASR) genes from upland rice variety, IRAT109 (Oryza sativa L. ssp. japonica), and demonstrated that overexpression of OsASR5 enhanced osmotic tolerance in Escherichia coli and drought tolerance in Arabidopsis and rice by regulating leaf water status under drought stress conditions. Moreover, overexpression of OsASR5 in rice increased endogenous ABA level and showed hypersensitive to exogenous ABA treatment at both germination and postgermination stages. The production of H2 O2 , a second messenger for the induction of stomatal closure in response to ABA, was activated in overexpression plants under drought stress conditions, consequently, increased stomatal closure and decreased stomatal conductance. In contrast, the loss-of-function mutant, osasr5, showed sensitivity to drought stress with lower relative water content under drought stress conditions. Further studies demonstrated that OsASR5 functioned as chaperone-like protein and interacted with stress-related HSP40 and 2OG-Fe (II) oxygenase domain containing proteins in yeast and plants. Taken together, we suggest that OsASR5 plays multiple roles in response to drought stress by regulating ABA biosynthesis, promoting stomatal closure, as well as acting as chaperone-like protein that possibly prevents drought stress-related proteins from inactivation.
Collapse
Affiliation(s)
- Jinjie Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yang Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhigang Yin
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Jihong Jiang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Minghui Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Xiao Guo
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhujia Ye
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yan Zhao
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Haiyan Xiong
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhanying Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yujie Shao
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Conghui Jiang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Hongliang Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Gynheung An
- Department of Plant Systems Biotech and Crop Biotech InstituteKyung Hee UniversityYonginKorea
| | - Nam‐Chon Paek
- Department of Plant Science, Plant Genomics and Breeding InstituteResearch Institute for Agriculture and Life SciencesSeoul National UniversitySeoulKorea
| | - Jauhar Ali
- International Rice Research InstituteMetro ManilaPhilippines
| | - Zichao Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| |
Collapse
|
43
|
Arenhart RA, Schunemann M, Neto LB, Margis R, Wang ZY, Margis-Pinheiro M. Rice ASR1 and ASR5 are complementary transcription factors regulating aluminium responsive genes. PLANT, CELL & ENVIRONMENT 2016; 39:645-51. [PMID: 26476017 PMCID: PMC7256019 DOI: 10.1111/pce.12655] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/28/2015] [Accepted: 10/05/2015] [Indexed: 05/18/2023]
Abstract
Rice is the most tolerant staple crop to aluminium (Al) toxicity, which is a limiting stress for grain production worldwide. This Al tolerance is the result of combined mechanisms that are triggered in part by the transcription factor ASR5. ASRs are dual target proteins that participate as chaperones in the cytoplasm and as transcription factors in the nucleus. Moreover, these proteins respond to biotic and abiotic stresses, including salt, drought and Al. Rice plants with silenced ASR genes are highly sensitive to Al. ASR5, a well-characterized protein, binds to specific cis elements in Al responsive genes and regulates their expression. Because the Al sensitive phenotype found in silenced rice plants could be due to the mutual silencing of ASR1 and ASR5, we investigated the effect of the specific silencing of ASR5. Plants with artificial microRNA silencing of ASR5 present a non-transformed phenotype in response to Al because of the induction of ASR1. ASR1 has the same subcellular localization as ASR5, binds to ASR5 cis-regulatory elements, regulates ASR5 regulated genes in a non-preferential manner and might replace ASR5 under certain conditions. Our results indicate that ASR1 and ASR5 act in concert and complementarily to regulate gene expression in response to Al.
Collapse
Affiliation(s)
- Rafael Augusto Arenhart
- Programa de Pós-Graduação em Genética e Biologia Molecular – Departamento de Genética-Universidade Federal do Rio Grande do Sul
| | - Mariana Schunemann
- Programa de Pós-Graduação em Genética e Biologia Molecular – Departamento de Genética-Universidade Federal do Rio Grande do Sul
| | - Lauro Bucker Neto
- Programa de Pós-Graduação em Genética e Biologia Molecular – Departamento de Genética-Universidade Federal do Rio Grande do Sul
| | - Rogerio Margis
- Programa de Pós-Graduação em Genética e Biologia Molecular – Departamento de Genética-Universidade Federal do Rio Grande do Sul
- Centro de Biotecnologia-Universidade Federal do Rio Grande do Sul
| | - Zhi-Yong Wang
- Department of Plant Biology-Carnegie Institution for Science, Stanford, CA 94305
| | - Marcia Margis-Pinheiro
- Programa de Pós-Graduação em Genética e Biologia Molecular – Departamento de Genética-Universidade Federal do Rio Grande do Sul
- Corresponding address: Dr. Marcia Margis-Pinheiro, Avenida Bento Gonçalves 9500, Departamento de Genética, sala 207, prédio 43312, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, Brasil. Phone: 55 (51) 3308-9814.
| |
Collapse
|
44
|
Li J, Dong Y, Li C, Pan Y, Yu J. SiASR4, the Target Gene of SiARDP from Setaria italica, Improves Abiotic Stress Adaption in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:2053. [PMID: 28127300 PMCID: PMC5227095 DOI: 10.3389/fpls.2016.02053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/22/2016] [Indexed: 05/05/2023]
Abstract
Drought and other types of abiotic stresses negatively affect plant growth and crop yields. The abscisic acid-, stress-, and ripening-induced (ASR) proteins play important roles in the protection of plants against abiotic stress. However, the regulatory pathway of the gene encoding this protein remains to be elucidated. In this study, the foxtail millet (Setaria italica) ASR gene, SiASR4, was cloned and characterized. SiASR4 localized to the cell nucleus, cytoplasm and cytomembrane, and the protein contained 102 amino acids, including an ABA/WDS (abscisic acid/water-deficit stress) domain, with a molecular mass of 11.5 kDa. The abundance of SiASR4 transcripts increased after treatment with ABA, NaCl, and PEG in foxtail millet seedlings. It has been reported that the S. italica ABA-responsive DRE-binding protein (SiARDP) binds to a DNA sequence with a CCGAC core and that there are five dehydration-responsive element (DRE) motifs within the SiASR4 promoter. Our analyses demonstrated that the SiARDP protein could bind to the SiASR4 promoter in vitro and in vivo. The expression of SiASR4 increased in SiARDP-overexpressing plants. SiASR4-transgenic Arabidopsis and SiASR4-overexpressing foxtail millet exhibited enhanced tolerance to drought and salt stress. Furthermore, the transcription of stress-responsive and reactive oxygen species (ROS) scavenger-associated genes was activated in SiASR4 transgenic plants. Together, these findings show that SiASR4 functions in the adaption to drought and salt stress and is regulated by SiARDP via an ABA-dependent pathway.
Collapse
|
45
|
Neto LB, Arenhart RA, de Oliveira LFV, de Lima JC, Bodanese-Zanettini MH, Margis R, Margis-Pinheiro M. ASR5 is involved in the regulation of miRNA expression in rice. PLANT CELL REPORTS 2015; 34:1899-1907. [PMID: 26183952 DOI: 10.1007/s00299-015-1836-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/25/2015] [Accepted: 06/30/2015] [Indexed: 06/04/2023]
Abstract
The work describes an ASR knockdown transcriptomic analysis by deep sequencing of rice root seedlings and the transactivation of ASR cis-acting elements in the upstream region of a MIR gene. MicroRNAs are key regulators of gene expression that guide post-transcriptional control of plant development and responses to environmental stresses. ASR (ABA, Stress and Ripening) proteins are plant-specific transcription factors with key roles in different biological processes. In rice, ASR proteins have been suggested to participate in the regulation of stress response genes. This work describes the transcriptomic analysis by deep sequencing two libraries, comparing miRNA abundance from the roots of transgenic ASR5 knockdown rice seedlings with that of the roots of wild-type non-transformed rice seedlings. Members of 59 miRNA families were detected, and 276 mature miRNAs were identified. Our analysis detected 112 miRNAs that were differentially expressed between the two libraries. A predicted inverse correlation between miR167abc and its target gene (LOC_Os07g29820) was confirmed using RT-qPCR. Protoplast transactivation assays showed that ASR5 is able to recognize binding sites upstream of the MIR167a gene and drive its expression in vivo. Together, our data establish a comparative study of miRNAome profiles and is the first study to suggest the involvement of ASR proteins in miRNA gene regulation.
Collapse
Affiliation(s)
- Lauro Bücker Neto
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, prédio 43312, Porto Alegre, RS, 91501-970, Brazil.
| | - Rafael Augusto Arenhart
- Centro Nacional de Pesquisa de Uva e Vinho, Empresa Brasileira de Pesquisa Agropecuária, Rua Livramento 515, Bento Gonçalves, RS, 95700-000, Brazil.
| | - Luiz Felipe Valter de Oliveira
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, prédio 43431, Porto Alegre, RS, 91501-970, Brazil.
| | - Júlio Cesar de Lima
- Universidade de Passo Fundo, Laboratório de Genética Molecular, BR285, Passo Fundo, RS, 99052-900, Brazil.
| | - Maria Helena Bodanese-Zanettini
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, prédio 43312, Porto Alegre, RS, 91501-970, Brazil.
| | - Rogerio Margis
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, prédio 43431, Porto Alegre, RS, 91501-970, Brazil.
| | - Márcia Margis-Pinheiro
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, prédio 43312, Porto Alegre, RS, 91501-970, Brazil.
| |
Collapse
|
46
|
Dominguez PG, Carrari F. ASR1 transcription factor and its role in metabolism. PLANT SIGNALING & BEHAVIOR 2015; 10:e992751. [PMID: 25794140 PMCID: PMC4623331 DOI: 10.4161/15592324.2014.992751] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 11/06/2014] [Accepted: 11/11/2014] [Indexed: 05/23/2023]
Abstract
Asr1 (ABA, stress, ripening) is a plant gene widely distributed in many species which was discovered by differential induction levels in tomato plants subjected to drought stress conditions. ASR1 also regulates the expression of a hexose transporter in grape and is involved in sugar and amino acid accumulation in some species like maize and potato. The control that ASR1 exerts on hexose transport is interesting from a biotechnological perspective because both sugar partitioning and content in specific organs affect the yield and the quality of many agronomically important crops. ASR1 affect plant metabolism by its dual activity as a transcription factor and as a chaperone-like protein. In this paper, we review possible mechanisms by which ASR1 affects metabolism, the differences observed among tissues and species, and the possible physiological implications of its role in metabolism.
Collapse
Affiliation(s)
- Pia Guadalupe Dominguez
- Instituto de Biotecnología; Instituto Nacional de Tecnología Agropecuaria (IB-INTA); and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Castelar, Argentina
| | - Fernando Carrari
- Instituto de Biotecnología; Instituto Nacional de Tecnología Agropecuaria (IB-INTA); and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Castelar, Argentina
| |
Collapse
|
47
|
Zhang L, Hu W, Wang Y, Feng R, Zhang Y, Liu J, Jia C, Miao H, Zhang J, Xu B, Jin Z. The MaASR gene as a crucial component in multiple drought stress response pathways in Arabidopsis. Funct Integr Genomics 2014; 15:247-60. [DOI: 10.1007/s10142-014-0415-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/06/2014] [Accepted: 11/07/2014] [Indexed: 10/24/2022]
|
48
|
Golan I, Dominguez PG, Konrad Z, Shkolnik-Inbar D, Carrari F, Bar-Zvi D. Tomato ABSCISIC ACID STRESS RIPENING (ASR) gene family revisited. PLoS One 2014; 9:e107117. [PMID: 25310287 PMCID: PMC4195575 DOI: 10.1371/journal.pone.0107117] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 08/12/2014] [Indexed: 01/10/2023] Open
Abstract
Tomato ABSCISIC ACID RIPENING 1 (ASR1) was the first cloned plant ASR gene. ASR orthologs were then cloned from a large number of monocot, dicot and gymnosperm plants, where they are mostly involved in response to abiotic (drought and salinity) stress and fruit ripening. The tomato genome encodes five ASR genes: ASR1, 2, 3 and 5 encode low-molecular-weight proteins (ca. 110 amino acid residues each), whereas ASR4 encodes a 297-residue polypeptide. Information on the expression of the tomato ASR gene family is scarce. We used quantitative RT-PCR to assay the expression of this gene family in plant development and in response to salt and osmotic stresses. ASR1 and ASR4 were the main expressed genes in all tested organs and conditions, whereas ASR2 and ASR3/5 expression was two to three orders of magnitude lower (with the exception of cotyledons). ASR1 is expressed in all plant tissues tested whereas ASR4 expression is limited to photosynthetic organs and stamens. Essentially, ASR1 accounted for most of ASR gene expression in roots, stems and fruits at all developmental stages, whereas ASR4 was the major gene expressed in cotyledons and young and fully developed leaves. Both ASR1 and ASR4 were expressed in flower organs, with ASR1 expression dominating in stamens and pistils, ASR4 in sepals and petals. Steady-state levels of ASR1 and ASR4 were upregulated in plant vegetative organs following exposure to salt stress, osmotic stress or the plant abiotic stress hormone abscisic acid (ABA). Tomato plants overexpressing ASR1 displayed enhanced survival rates under conditions of water stress, whereas ASR1-antisense plants displayed marginal hypersensitivity to water withholding.
Collapse
Affiliation(s)
- Ido Golan
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Pia Guadalupe Dominguez
- Instituto de Biotecnología, Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
| | - Zvia Konrad
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Doron Shkolnik-Inbar
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Fernando Carrari
- Instituto de Biotecnología, Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
| | - Dudy Bar-Zvi
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
- * E-mail:
| |
Collapse
|
49
|
Golan I, Dominguez PG, Konrad Z, Shkolnik-Inbar D, Carrari F, Bar-Zvi D. Tomato ABSCISIC ACID STRESS RIPENING (ASR) gene family revisited. PLoS One 2014; 9:e107117. [PMID: 25310287 DOI: 10.1071/pp00134] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 08/12/2014] [Indexed: 05/26/2023] Open
Abstract
Tomato ABSCISIC ACID RIPENING 1 (ASR1) was the first cloned plant ASR gene. ASR orthologs were then cloned from a large number of monocot, dicot and gymnosperm plants, where they are mostly involved in response to abiotic (drought and salinity) stress and fruit ripening. The tomato genome encodes five ASR genes: ASR1, 2, 3 and 5 encode low-molecular-weight proteins (ca. 110 amino acid residues each), whereas ASR4 encodes a 297-residue polypeptide. Information on the expression of the tomato ASR gene family is scarce. We used quantitative RT-PCR to assay the expression of this gene family in plant development and in response to salt and osmotic stresses. ASR1 and ASR4 were the main expressed genes in all tested organs and conditions, whereas ASR2 and ASR3/5 expression was two to three orders of magnitude lower (with the exception of cotyledons). ASR1 is expressed in all plant tissues tested whereas ASR4 expression is limited to photosynthetic organs and stamens. Essentially, ASR1 accounted for most of ASR gene expression in roots, stems and fruits at all developmental stages, whereas ASR4 was the major gene expressed in cotyledons and young and fully developed leaves. Both ASR1 and ASR4 were expressed in flower organs, with ASR1 expression dominating in stamens and pistils, ASR4 in sepals and petals. Steady-state levels of ASR1 and ASR4 were upregulated in plant vegetative organs following exposure to salt stress, osmotic stress or the plant abiotic stress hormone abscisic acid (ABA). Tomato plants overexpressing ASR1 displayed enhanced survival rates under conditions of water stress, whereas ASR1-antisense plants displayed marginal hypersensitivity to water withholding.
Collapse
Affiliation(s)
- Ido Golan
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Pia Guadalupe Dominguez
- Instituto de Biotecnología, Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
| | - Zvia Konrad
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Doron Shkolnik-Inbar
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Fernando Carrari
- Instituto de Biotecnología, Instituto Nacional de Tecnología Agropecuaria, Buenos Aires, Argentina
| | - Dudy Bar-Zvi
- Department of Life Sciences and Doris and Bertie Black Center for Bioenergetics in Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| |
Collapse
|
50
|
Joo J, Choi HJ, Lee YH, Lee S, Lee CH, Kim CH, Cheong JJ, Choi YD, Song SI. Over-expression of BvMTSH, a fusion gene for maltooligosyltrehalose synthase and maltooligosyltrehalose trehalohydrolase, enhances drought tolerance in transgenic rice. BMB Rep 2014; 47:27-32. [PMID: 24209631 PMCID: PMC4163841 DOI: 10.5483/bmbrep.2014.47.1.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/05/2013] [Accepted: 05/16/2013] [Indexed: 11/20/2022] Open
Abstract
Plant abiotic stress tolerance has been modulated by engineering the trehalose synthesis pathway. However, many stress-tolerant plants that have been genetically engineered for the trehalose synthesis pathway also show abnormal development. The metabolic intermediate trehalose 6-phosphate has the potential to cause aberrations in growth. To avoid growth inhibition by trehalose 6-phosphate, we used a gene that encodes a bifunctional in-frame fusion (BvMTSH) of maltooligosyltrehalose synthase (BvMTS) and maltooligosyltrehalose trehalohydrolase (BvMTH) from the nonpathogenic bacterium Brevibacterium helvolum. BvMTS converts maltooligosaccharides into maltooligosyltrehalose and BvMTH releases trehalose. Transgenic rice plants that over-express BvMTSH under the control of the constitutive rice cytochrome c promoter (101MTSH) or the ABA-inducible Ai promoter (105MTSH) show enhanced drought tolerance without growth inhibition. Moreover, 101MTSH and 105MTSH showed an ABA-hyposensitive phenotype in the roots. Our results suggest that over-expression of BvMTSH enhances drought-stress tolerance without any abnormal growth and showes ABA hyposensitive phenotype in the roots.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Sang Ik Song
- Division of Bioscience and Bioinformatics, Myongji University, Yongin 449-728, Korea
| |
Collapse
|