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Genome-Wide Analysis of LIM Family Genes in Foxtail Millet ( Setaria italica L.) and Characterization of the Role of SiWLIM2b in Drought Tolerance. Int J Mol Sci 2019; 20:ijms20061303. [PMID: 30875867 PMCID: PMC6470693 DOI: 10.3390/ijms20061303] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 12/12/2022] Open
Abstract
LIM proteins have been found to play important roles in many life activities, including the regulation of gene expression, construction of the cytoskeleton, signal transduction and metabolic regulation. Because of their important roles in many aspects of plant development, LIM genes have been studied in many plant species. However, the LIM gene family has not yet been characterized in foxtail millet. In this study, we analyzed the whole genome of foxtail millet and identified 10 LIM genes. All LIM gene promoters contain MYB and MYC cis-acting elements that are related to drought stress. Based on the presence of multiple abiotic stress-related cis-elements in the promoter of SiWLIM2b, we chose this gene for further study. We analyzed SiWLIM2b expression under abiotic stress and hormone treatments using qRT-PCR. We found that SiWLIM2b was induced by various abiotic stresses and hormones. Under drought conditions, transgenic rice of SiWLIM2b-overexpression had a higher survival rate, higher relative water content and less cell damage than wild type (WT) rice. These results indicate that overexpression of the foxtail millet SiWLIM2b gene enhances drought tolerance in transgenic rice, and the SiWLIM2b gene can potentially be used for molecular breeding of crops with increased resistance to abiotic stress.
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352
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Chaichi M, Sanjarian F, Razavi K, Gonzalez-Hernandez JL. Analysis of transcriptional responses in root tissue of bread wheat landrace (Triticum aestivum L.) reveals drought avoidance mechanisms under water scarcity. PLoS One 2019; 14:e0212671. [PMID: 30840683 PMCID: PMC6402654 DOI: 10.1371/journal.pone.0212671] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 02/07/2019] [Indexed: 11/24/2022] Open
Abstract
In this study, high-throughput sequencing (RNA-Seq) was utilized to evaluate differential expression of transcripts and their related genes involved in response to terminal drought in root tissues of bread wheat landrace (L-82) and drought-sensitive genotype (Marvdasht). Subsets of 460 differentially expressed genes (DEGs) in drought-tolerant genotype and 236 in drought-sensitive genotype were distinguished and functionally annotated with 105 gene ontology (GO) terms and 77 metabolic pathways. Transcriptome profiling of drought-resistant genotype “L-82” showed up-regulation of genes mostly involved in Oxidation-reduction process, secondary metabolite biosynthesis, abiotic stress response, transferase activity and heat shock proteins. On the other hand, down-regulated genes mostly involved in signaling, oxidation-reduction process, secondary metabolite biosynthesis, auxin-responsive protein and lipid metabolism. We hypothesized that the drought tolerance in “L-82” was a result of avoidance strategies. Up-regulation of genes related to the deeper root system and adequate hydraulic characteristics to allow water uptake under water scarcity confirms our hypothesis. The transcriptomic sequences generated in this study provide information about mechanisms of acclimation to drought in the selected bread wheat landrace, “L-82”, and will help us to unravel the mechanisms underlying the ability of crops to reproduce and keep its productivity even under drought stress.
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Affiliation(s)
- Mehrdad Chaichi
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Forough Sanjarian
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
- * E-mail:
| | - Khadijeh Razavi
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Jose L. Gonzalez-Hernandez
- Agronomy, Horticulture and Plant Sciences Dept., South Dakota State University, Brookings, South Dakota, United States of America
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Hashem A, Kumar A, Al-Dbass AM, Alqarawi AA, Al-Arjani ABF, Singh G, Farooq M, Abd_Allah EF. Arbuscular mycorrhizal fungi and biochar improves drought tolerance in chickpea. Saudi J Biol Sci 2019; 26:614-624. [PMID: 30899180 PMCID: PMC6408710 DOI: 10.1016/j.sjbs.2018.11.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/09/2018] [Accepted: 11/11/2018] [Indexed: 01/26/2023] Open
Abstract
Arbuscular mycorrhizal fungi (AMF) inoculation and biochar amendment has been reported to improve growth of several crop plants however their role in stress amelioration individually as well as in combination has not been worked out. This experiment was conducted to evaluate the application of AMF and biochar on the performance of chickpea under drought stress. The treatments included the individual as well as combined treatment of AMF and biochar to drought stressed and normal chickpea plants. Plants inoculation improved growth in terms of shoot and root length, leaf area and number of branches which was observed to show a steep decline due to drought stress. Drought declined the AMF colonization potential though biochar amendment ameliorated the negative effects of drought significantly by improving the spore population, number of mycelium, vesicle and arbuscules and the percentage of colonization as well. Increased chlorophyll synthesis in biochar and AMF treated plants was obvious, which lead to significant enhancement in the net photosynthetic efficiency. Drought stress also declined the relative water content (RWC) and membrane stability index (MSI), while treatment of biochar and AMF either individually or in combination mitigated the deleterious effects to considerable extent and caused a significant enhancement in RWC and MSI under normal conditions. Amendments with biochar and AMF inoculation increased the nitrogen fixation attributes including the number and weight of nodules, leghemoglobin content and activity of nitrate reductase enzyme leading to greater uptake and assimilation of nitrogen in them when compared to drought stressed plants. Drought stressed chickpea plants exhibited considerable reduction in uptake of nitrogen and phosphorous which was ameliorated by biochar and AMF treatments. It could be suggested that increase in growth and physiological attributes in chickpea due to biochar amendments and AMF inoculation under drought stress were plausibly due to their involvement in nitrogen and phosphorous uptake, chlorophyll synthesis and photosynthesis.
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Affiliation(s)
- Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza 12511, Egypt
| | - Ashwani Kumar
- Metagenomics and Secretomics Research Laboratory, Department of Botany, Dr. Harisingh Gour University (A Central University), Sagar, M.P. 470003, India
| | - Abeer M. Al-Dbass
- Biochemistry Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Abdulaziz A. Alqarawi
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Al-Bandari Fahad Al-Arjani
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
| | - Garima Singh
- Department of Biotechnology, Aizawl, Mizoram University, Mizoram, India
| | - Muhammad Farooq
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud 123, Oman
- The UWA Institute of Agriculture and School of Agriculture & Environment, The University of Western Australia, Perth, WA 6001, Australia
- Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box. 2460, Riyadh 11451, Saudi Arabia
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354
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Marček T, Hamow KÁ, Végh B, Janda T, Darko E. Metabolic response to drought in six winter wheat genotypes. PLoS One 2019; 14:e0212411. [PMID: 30779775 PMCID: PMC6380608 DOI: 10.1371/journal.pone.0212411] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 02/02/2019] [Indexed: 12/13/2022] Open
Abstract
Wheat is one of the most important cereals, whose growth and development is strongly limited by drought. This study investigated the physiological and metabolic response of six winter wheat cultivars to drought with the emphasis on the induction of dominant metabolites affected by the treatment and genotypes or both. The plants were exposed to a moderate (non-lethal) drought stress, which was induced by withholding watering for six days under controlled greenhouse conditions. A decline in CO2 assimilation (Pn) and transpiration rate, stomata closure, a decrease in relative water content (RWC) and increase of malondialdehyde content were observed in drought-treated plants of all cultivars. These changes were most pronounced in Ellvis, while Soissons was able to retain the higher RWC and Pn. Among the studied metabolites, sugars (sucrose, glucose, fructose, several disaccharides), organic acids (malic acid, oxalic acids), amino acids (proline, threonine, gamma-aminobutyric acid (GABA), glutamine) and sugar alcohols such as myo-inositol accumulated to higher levels in the plants exposed to drought stress in comparison with the control. The accumulation of several metabolites in response to drought differed between the genotypes. Drought induced the production of sucrose, malic acid and oxalic acid, unknown organic acid 1, unknown disaccharide 1, 2 and 3, GABA, L-threonine, glutamic acid in four (Soissons, Žitarka, Antonija or Toborzó) out of six genotypes. In addition, Soissons, which was the most drought tolerant genotype, accumulated the highest amount of unknown disaccharide 5, galactonic and phosphoric acids. The two most drought sensitive cultivars, Srpanjka and Ellvis, demonstrated different metabolic adjustment in response to the stress treatment. Srpanjka responded to drought by increasing the amount of glucose and fructose originated from hydrolyses of sucrose and accumulating unidentified sugar alcohols 1 and 2. In Ellvis, drought caused inhibition of photosynthetic carbon metabolism, as evidence by the decreased Pn, gs, RWC and accumulation levels of sugar metabolites (sucrose, glucose and fructose). The results revealed the differences in metabolic response to drought among the genotypes, which drew attention on metabolites related with general response and on those metabolites which are part of specific response that may play an important role in drought tolerance.
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Affiliation(s)
- Tihana Marček
- Department of Food and Nutrition Research, Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Kamirán Áron Hamow
- Department of Zoology, Plant Protection Institute, Centre for Agricultural Research of the Hungarian Academy of Sciences, Budapest, Hungary
- Department of Plant Physiology, Agricultural Institute, Centre for Agricultural Research of the Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Balázs Végh
- Department of Plant Physiology, Agricultural Institute, Centre for Agricultural Research of the Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Tibor Janda
- Department of Plant Physiology, Agricultural Institute, Centre for Agricultural Research of the Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Eva Darko
- Department of Plant Physiology, Agricultural Institute, Centre for Agricultural Research of the Hungarian Academy of Sciences, Martonvásár, Hungary
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355
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Heuchera Creme Brulee and Mahogany Medicinal Value under Water Stress and Oligosaccharide (COS) Treatment. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:4242359. [PMID: 30906414 PMCID: PMC6398046 DOI: 10.1155/2019/4242359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/28/2019] [Indexed: 12/29/2022]
Abstract
Food borne pathogens cause serious human illnesses and diseases and their control using natural bioactive compounds becomes essential for the progress of agricultural and food industries. Developing novel tools to enhance the medicinal values of traditional horticultural medicinal crops is one of the promising methods for achieving food borne pathogens control. In this study, oligosaccharide water solutions were applied to Heuchera Creme Brulee and Mahogany subjected to a normal irrigation interval (2 days) or to prolonged irrigation intervals (6 days) for 6 weeks. Plant morphological, physiological, and metabolic markers associated with the bioactivity of leaf extracts against selected microbes. Oligosaccharide-treated plants showed significant increases in all morphological parameters during normal and prolonged irrigation intervals as compared to those of the controls. Morphological improvement associated with a significant increase in chlorophyll, carbohydrates, proline, K, Ca, phenols, and free and total ascorbate and antioxidants. Superoxide dismutase, catalase, and ascorbate peroxidase activities were higher, while H2O2 accumulated to a lower extent in oligosaccharide-treated plants. These morphological and metabolic changes associated with increased antibacterial and antifungal activities of leaf extracts and their activities were comparable to antibiotics and antifungal agents (minimum inhibitory concentrations values were 0.5 -0.20 mg−1mL for bacteria and 0.08 -0.20 mg−1mL for fungi in Mahogany). The application of oligosaccharide and/or water stress might be of great value for producing natural bioactive compounds for food borne pathogens control.
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356
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Xia H, Luo Z, Xiong J, Ma X, Lou Q, Wei H, Qiu J, Yang H, Liu G, Fan L, Chen L, Luo L. Bi-directional Selection in Upland Rice Leads to Its Adaptive Differentiation from Lowland Rice in Drought Resistance and Productivity. MOLECULAR PLANT 2019; 12:170-184. [PMID: 30584948 DOI: 10.1016/j.molp.2018.12.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 12/13/2018] [Accepted: 12/16/2018] [Indexed: 06/09/2023]
Abstract
Drought resistance is required in rice breeding to address the challenge of frequent droughts. However, the evolutionary mechanism of rice drought resistance is not fully understood. We investigated the genetic differentiation between upland and lowland rice domesticated in agro-ecosystems with contrasting water-soil conditions using genome-wide SNPs. We estimated morphological differences among upland and lowland rice in drought resistance and productivity through common garden experiments. Upland rice had better drought resistance but poorer productivity. The negative correlations between traits of drought resistance and productivity are attributed to the underlying genetic trade-offs through tight linkages (e.g., DCA1 and OsCesA7) or pleiotropic effects (e.g., LAX1). The genetic trade-offs are common and greatly shape the evolution of drought resistance in upland rice. In genomic regions associated with both productivity and drought resistance, signs of balancing selection were detected in upland rice, while signs of directional selection were detected in lowland rice, potentially contributing to their adaptive differentiation. Signs of balancing selection in upland rice resulted from bi-directional selection during its domestication in drought-prone upland agro-ecosystems. Using genome-wide association analysis, we identified several valuable quantitative trait loci associated with drought resistance, for which highly differentiated genes should be considered candidates. Bi-directional selection breaking tight linkages by accumulating recombination events would be applicable in breeding water-saving and drought-resistance rice.
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Affiliation(s)
- Hui Xia
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Zhi Luo
- Shanghai Agrobiological Gene Center, Shanghai, China; College of Plant Sciences & Technology, Huazhong Agricultural University, Wuhan, China
| | - Jie Xiong
- Shanghai Agrobiological Gene Center, Shanghai, China; College of Plant Sciences & Technology, Huazhong Agricultural University, Wuhan, China
| | - Xiaosong Ma
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Qiaojun Lou
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Haibin Wei
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Jie Qiu
- Institute of Crop Science & Institute of Bioinformatics, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Hua Yang
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Guolan Liu
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Longjiang Fan
- Institute of Crop Science & Institute of Bioinformatics, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Liang Chen
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Lijun Luo
- Shanghai Agrobiological Gene Center, Shanghai, China; College of Plant Sciences & Technology, Huazhong Agricultural University, Wuhan, China.
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357
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Deng X, Yuan S, Cao H, Lam SM, Shui G, Hong Y, Wang X. Phosphatidylinositol-hydrolyzing phospholipase C4 modulates rice response to salt and drought. PLANT, CELL & ENVIRONMENT 2019; 42:536-548. [PMID: 30175516 DOI: 10.1111/pce.13437] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 08/21/2018] [Accepted: 08/28/2018] [Indexed: 05/04/2023]
Abstract
Phosphatidylinositol-specific phospholipase C (PI-PLC) is involved in stress signalling but its signalling function remains largely unknown in crop plants. Here, we report that the PI-PLC4 from rice (Oryza sativa cv), OsPLC4, plays a positive role in osmotic stress response. Two independent knockout mutants, plc4-1 and plc4-2, exhibited decreased seedling growth and survival rate whereas overexpression of OsPLC4 improved survival rate under high salinity and water deficiency, compared with wild type (WT). OsPLC4 hydrolyses PI, phosphatidylinositol 4-phosphate (PI4P), and phosphatidylinositol-4,5-bisphosphate (PIP2 ) to generate diacylglycerol (DAG) in vitro. Knockout of OsPLC4 attenuated salt-induced increase of phosphatidic acid (PA) whereas overexpression of OsPLC4 decreased the level of PI4P and PIP2 under salt treatment. Applications of DAG or PA restored the growth defect of plc4-1 to WT but DAG kinase inhibitor 1 blocked the complementary effect of DAG in plc4-1 under salt stress. In addition, the loss of OsPLC4 compromised the increase of inositol triphosphate and free cytoplasmic Ca2+ ([Ca2+ ]cyt ) and inhibited the induction of genes involved in Ca2+ sensor and osmotic stress response to salt stress. The results indicate that OsPLC4 modulates the activity of two signalling pathways, PA and Ca2+ , to affect rice seedling response to osmotic stress.
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Affiliation(s)
- Xianjun Deng
- National Key Laboratory of Crop Genetic Improvement, College of Life Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Shu Yuan
- National Key Laboratory of Crop Genetic Improvement, College of Life Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Huasheng Cao
- National Key Laboratory of Crop Genetic Improvement, College of Life Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Sin Man Lam
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Guanghou Shui
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yueyun Hong
- National Key Laboratory of Crop Genetic Improvement, College of Life Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xuemin Wang
- Department of Biology, University of Missouri, St. Louis, Missouri, USA
- Donald Danforth Plant Science Center, St. Louis, Missouri, USA
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358
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Hoang GT, Van Dinh L, Nguyen TT, Ta NK, Gathignol F, Mai CD, Jouannic S, Tran KD, Khuat TH, Do VN, Lebrun M, Courtois B, Gantet P. Genome-wide Association Study of a Panel of Vietnamese Rice Landraces Reveals New QTLs for Tolerance to Water Deficit During the Vegetative Phase. RICE (NEW YORK, N.Y.) 2019; 12:4. [PMID: 30701393 PMCID: PMC6357217 DOI: 10.1186/s12284-018-0258-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 12/11/2018] [Indexed: 05/06/2023]
Abstract
BACKGROUND Drought tolerance is a major challenge in breeding rice for unfavorable environments. In this study, we used a panel of 180 Vietnamese rice landraces genotyped with 21,623 single-nucleotide polymorphism markers to perform a genome-wide association study (GWAS) for different drought response and recovery traits during the vegetative stage. These landraces originate from different geographical locations and are adapted to different agrosystems characterized by contrasted water regimes. Vietnamese landraces are often underrepresented in international panels used for GWAS, but they can contain original genetic determinants related to drought resistance. RESULTS The panel of 180 rice varieties was phenotyped under greenhouse conditions for several drought-related traits in an experimental design with 3 replicates. Plants were grown in pots for 4 weeks and drought-stressed by stopping irrigation for an additional 4 weeks. Drought sensitivity scores and leaf relative water content were measured throughout the drought stress. The recovery capacity was measured 2 weeks after plant rewatering. Several QTLs associated with these drought tolerance traits were identified by GWAS using a mixed model with control of structure and kinship. The number of detected QTLs consisted of 14 for leaf relative water content, 9 for slope of relative water content, 12 for drought sensitivity score, 3 for recovery ability and 1 for relative crop growth rate. This set of 39 QTLs actually corresponded to a total of 17 different QTLs because 9 were simultaneously associated with two or more traits, which indicates that these common loci may have pleiotropic effects on drought-related traits. No QTL was found in association with the same traits in both the indica and japonica subpanels. The possible candidate genes underlying the quantitative trait loci are reviewed. CONCLUSIONS Some of the identified QTLs contain promising candidate genes with a function related to drought tolerance by osmotic stress adjustment.
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Affiliation(s)
- Giang Thi Hoang
- National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, LMI RICE-2, Hanoi, 00000, Vietnam.
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam.
| | - Lam Van Dinh
- National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Thom Thi Nguyen
- IRD, Université de Montpellier, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Nhung Kim Ta
- National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, LMI RICE-2, Hanoi, 00000, Vietnam
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Floran Gathignol
- IRD, Université de Montpellier, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Chung Duc Mai
- National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, LMI RICE-2, Hanoi, 00000, Vietnam
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Stefan Jouannic
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam
- IRD, Université de Montpellier, UMR DIADE, 34095, Montpellier, France
| | - Khanh Dang Tran
- Genetic Engineering Division, Agricultural Genetics Institute, Hanoi, 00000, Vietnam
| | - Trung Huu Khuat
- Genetic Engineering Division, Agricultural Genetics Institute, Hanoi, 00000, Vietnam
| | - Vinh Nang Do
- National Key Laboratory for Plant Cell Biotechnology, Agricultural Genetics Institute, LMI RICE-2, Hanoi, 00000, Vietnam
| | - Michel Lebrun
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam
- IRD, Université de Montpellier, LMI RICE-2, Hanoi, 00000, Vietnam
- IRD, Université de Montpellier, UMR LSTM, 34095, Montpellier, France
| | - Brigitte Courtois
- Cirad, UMR-AGAP, F-34398, Montpellier, France
- CIRAD, INRA, Univ Montpellier, Montpellier SupAgro, Montpellier, France
| | - Pascal Gantet
- University of Science and Technology of Hanoi, LMI RICE-2, Hanoi, 00000, Vietnam.
- IRD, Université de Montpellier, LMI RICE-2, Hanoi, 00000, Vietnam.
- IRD, Université de Montpellier, UMR DIADE, 34095, Montpellier, France.
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359
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Lokesh U, Venkatesh B, Kiranmai K, Nareshkumar A, Amarnathareddy V, Rao GL, Anthony Johnson AM, Pandurangaiah M, Sudhakar C. Overexpression of ß-Ketoacyl Co-A Synthase1 Gene Improves Tolerance of Drought Susceptible Groundnut ( Arachis hypogaea L.) Cultivar K-6 by Increased Leaf Epicuticular Wax Accumulation. FRONTIERS IN PLANT SCIENCE 2019; 9:1869. [PMID: 30687340 PMCID: PMC6336926 DOI: 10.3389/fpls.2018.01869] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 12/04/2018] [Indexed: 05/18/2023]
Abstract
Drought is one of the major environmental constraints affecting the crop productivity worldwide. One of the agricultural challenges today is to develop plants with minimized water utilization and reduced water loss in adverse environmental conditions. Epicuticular waxes play a major role in minimizing water loss. Epicuticular wax covers aerial plant parts and also prevents non-stomatal water loss by forming the outermost barrier from the surfaces. Epicuticular wax content (EWC) variation was found to be affiliated with drought tolerance of groundnut cultivars. In the current study, a fatty acid elongase gene, KCS1, which catalyzes a rate limiting step in the epicuticular wax biosynthesis was isolated from drought tolerant cultivar K-9 and overexpressed in drought sensitive groundnut cultivar (K-6) under the control of CaMV35S constitutive promoter. Transgenic groundnut plants overexpressing AhKCS1 exhibited normal growth and displaying greenish dark shiny appearance. Environmental scanning electron microscopy (ESEM) revealed the excess of epicuticular wax crystal depositions on the transgenic plant leaves compared to non-transgenic wild type plants. The findings were further supported by gas chromotography-mass spectroscopic analysis (GC-MS) that revealed enhanced levels of fatty acids, secondary alcohols, primary alcohols, aldehydes, alkanes, and ketones in transgenics compared to wild types. The AhKCS1 overexpressing transgenic groundnut plants exhibited increase in the cuticular wax content, reduction of water loss, lower membrane damage, decreased MDA content, and high proline content compared to that of non-transgenic groundnut plants. Our findings suggest that the AhKCS1 gene plays a major role in combating drought stress by preventing non-stomatal water loss in drought sensitive groundnut cultivar (K-6).
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Affiliation(s)
- Uppala Lokesh
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Boya Venkatesh
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Kurnool Kiranmai
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Ambekar Nareshkumar
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Vennapusa Amarnathareddy
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Gunupuru Lokanadha Rao
- Department of Plant, Food, and Environmental Sciences, Dalhousie University, Truro, NS, Canada
| | | | - Merum Pandurangaiah
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
| | - Chinta Sudhakar
- Plant Molecular Biology Laboratory, Department of Botany, Sri Krishnadevaraya University, Anantapur, India
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360
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Zhang C, Shi S, Liu Z, Yang F, Yin G. Drought tolerance in alfalfa (Medicago sativa L.) varieties is associated with enhanced antioxidative protection and declined lipid peroxidation. JOURNAL OF PLANT PHYSIOLOGY 2019; 232:226-240. [PMID: 30537610 DOI: 10.1016/j.jplph.2018.10.023] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 10/25/2018] [Accepted: 10/25/2018] [Indexed: 05/23/2023]
Abstract
Drought stress is considered the most adverse factor restricting plant survival, growth, and productivity. The identification of the key adaptive mechanisms to drought stress is essential to enhance the drought resistance of plants. In this study, differential responses of three alfalfa varieties to drought, including Medicago sativa L. cv. Longzhong (drought-tolerant), Longdong (moderate drought-tolerant), and Gannong No. 3 (drought-sensitive), were comparatively studied at morphological, physio-biochemical, and transcriptional levels after a 12-day period of drought stress simulated by -1.2 MPa polyethylene glycol (PEG-6000). The results showed that prolonged drought stress dramatically decreased growth and photosynthetic capacity of three alfalfa varieties while it increased the accumulation of malondialdehyde (MDA), reactive oxygen species (ROS), osmolytes and antioxidants including reduced ascorbate and glutathione, ascorbate peroxidase (APX) activities, and gene expression of antioxidative enzymes (MsCu/Zn-SOD, MsFeSOD, MtPOD, MsGPX, MsAPX, MsMDAR, MtDHAR, and MsGR). Nine days of treatment and some key traits, including the maximum quantum yield of photosystem II (Fv/Fm), the levels of MDA, O2-, and H2O2, the redox states of ascorbate and glutathione, APX activity, and the transcript levels of MsFeSOD, MsGR, and MsMDAR, might contribute to differentiating the drought stress tolerance in alfalfa. Overall, drought-tolerant Longzhong showed the highest water retention, photosynthetic performance, and osmoregulation capacity, the lowest lipid peroxidation, and the highest antioxidant enzyme activities and gene expression, which were mainly involved in the ascorbate-glutathione cycle to maintain the balance between the generation and scavenging of intracellular ROS. These findings highlight that enhanced antioxidative protection and declined lipid peroxidation play an important role in alfalfa tolerance against drought.
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Affiliation(s)
- Cuimei Zhang
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, China
| | - Shangli Shi
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, China.
| | - Zhen Liu
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, China
| | - Fan Yang
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, China
| | - Guoli Yin
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, 730070, China
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361
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Zhao J, Yuan S, Zhou M, Yuan N, Li Z, Hu Q, Bethea FG, Liu H, Li S, Luo H. Transgenic creeping bentgrass overexpressing Osa-miR393a exhibits altered plant development and improved multiple stress tolerance. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:233-251. [PMID: 29873883 PMCID: PMC6330543 DOI: 10.1111/pbi.12960] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 05/19/2018] [Accepted: 06/03/2018] [Indexed: 05/12/2023]
Abstract
MicroRNA393 (miR393) has been implicated in plant growth, development and multiple stress responses in annual species such as Arabidopsis and rice. However, the role of miR393 in perennial grasses remains unexplored. Creeping bentgrass (Agrostis stolonifera L.) is an environmentally and economically important C3 cool-season perennial turfgrass. Understanding how miR393 functions in this representative turf species would allow the development of novel strategies in genetically engineering grass species for improved abiotic stress tolerance. We have generated and characterized transgenic creeping bentgrass plants overexpressing rice pri-miR393a (Osa-miR393a). We found that Osa-miR393a transgenics had fewer, but longer tillers, enhanced drought stress tolerance associated with reduced stomata density and denser cuticles, improved salt stress tolerance associated with increased uptake of potassium and enhanced heat stress tolerance associated with induced expression of small heat-shock protein in comparison with wild-type controls. We also identified two targets of miR393, AsAFB2 and AsTIR1, whose expression is repressed in transgenics. Taken together, our results revealed the distinctive roles of miR393/target module in plant development and stress responses between creeping bentgrass and other annual species, suggesting that miR393 would be a promising candidate for generating superior crop cultivars with enhanced multiple stress tolerance, thus contributing to agricultural productivity.
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Affiliation(s)
- Junming Zhao
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
- Animal Science and Technology CollegeSichuan Agricultural UniversityChengduSichuanChina
| | - Shuangrong Yuan
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Man Zhou
- College of Natural, Applied and Health SciencesWenzhou Kean UniversityWenzhouZhejiangChina
| | - Ning Yuan
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Zhigang Li
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Qian Hu
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | - Frank G. Bethea
- Department of Plant and Environmental SciencesClemson UniversityClemsonSCUSA
| | - Haibo Liu
- Department of Plant and Environmental SciencesClemson UniversityClemsonSCUSA
| | - Shigui Li
- Rice Research InstituteSichuan Agricultural UniversityChengduSichuanChina
| | - Hong Luo
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
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362
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Andrade LM, Peixoto-Junior RF, Ribeiro RV, Nóbile PM, Brito MS, Marchiori PER, Carlin SD, Martins APB, Goldman MHS, Llerena JPP, Fregonesi C, Perecin D, Nebó JFCDO, Figueira A, Benatti TR, da Silva J, Mazzafera P, Creste S. Biomass Accumulation and Cell Wall Structure of Rice Plants Overexpressing a Dirigent-Jacalin of Sugarcane ( ShDJ) Under Varying Conditions of Water Availability. FRONTIERS IN PLANT SCIENCE 2019; 10:65. [PMID: 30815002 PMCID: PMC6381051 DOI: 10.3389/fpls.2019.00065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 01/16/2019] [Indexed: 05/03/2023]
Abstract
A sugarcane gene encoding a dirigent-jacalin, ShDJ, was induced under drought stress. To elucidate its biological function, we integrated a ShDJ-overexpression construction into the rice Nipponbare genome via Agrobacterium-mediated transformation. Two transgenic lines with a single copy gene in T0 were selected and evaluated in both the T1 and T4 generations. Transgenic lines had drastically improved survival rate under water deficit conditions, at rates close to 100%, while WT did not survive. Besides, transgenic lines had improved biomass production and higher tillering under water deficit conditions compared with WT plants. Reduced pectin and hemicellulose contents were observed in transgenic lines compared with wild-type plants under both well-watered and water deficit conditions, whereas cellulose content was unchanged in line #17 and reduced in line #29 under conditions of low water availability. Changes in lignin content under water deficit were only observed in line #17. However, improvements in saccharification were found in both transgenic lines along with changes in the expression of OsNTS1/2 and OsMYB58/63 secondary cell wall biosynthesis genes. ShDJ-overexpression up-regulated the expression of the OsbZIP23, OsGRAS23, OsP5CS, and OsLea3 genes in rice stems under well-watered conditions. Taken together, our data suggest that ShDJ has the potential for improving drought tolerance, plant biomass accumulation, and saccharification efficiency.
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Affiliation(s)
- Larissa Mara Andrade
- Instituto Agronômico (IAC), Centro de Cana, Ribeirão Preto, Brazil
- PPG - Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Rafael Fávero Peixoto-Junior
- Instituto Agronômico (IAC), Centro de Cana, Ribeirão Preto, Brazil
- PPG - Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | | | | | - Michael Santos Brito
- Instituto Agronômico (IAC), Centro de Cana, Ribeirão Preto, Brazil
- Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, São José dos Campos, Brazil
| | - Paulo Eduardo Ribeiro Marchiori
- Instituto Agronômico (IAC), Centro de Ecofisiologia e Biofísica, Campinas, Brazil
- Departamento de Biologia, Universidade Federal de Lavras, Lavras, Brazil
| | | | - Alexandre Palma Boer Martins
- Instituto Agronômico (IAC), Centro de Cana, Ribeirão Preto, Brazil
- PPG - Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Maria Helena S. Goldman
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | | | | | - Dilermando Perecin
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Jaboticabal, Brazil
| | | | - Antonio Figueira
- Centro de Energia Nuclear na Agricultura (CENA), University of São Paulo, Piracicaba, Brazil
| | | | - Jorge da Silva
- Texas A&M Agrilife Research & Extension Center, Weslaco, TX, United States
| | - Paulo Mazzafera
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil
| | - Silvana Creste
- Instituto Agronômico (IAC), Centro de Cana, Ribeirão Preto, Brazil
- *Correspondence: Silvana Creste,
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363
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Harris-Shultz KR, Hayes CM, Knoll JE. Mapping QTLs and Identification of Genes Associated with Drought Resistance in Sorghum. Methods Mol Biol 2019; 1931:11-40. [PMID: 30652280 DOI: 10.1007/978-1-4939-9039-9_2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Water limits global agricultural production. Increases in global aridity, a growing human population, and the depletion of aquifers will only increase the scarcity of water for agriculture. Water is essential for plant growth and in areas that are prone to drought, the use of drought-resistant crops is a long-term solution for growing more food for more people with less water. Sorghum is well adapted to hot and dry environments and has been used as a dietary staple for millions of people. Increasing the drought resistance in sorghum hybrids with no impact on yield is a continual objective for sorghum breeders. In this review, we describe the loci, quantitative trait loci (QTLs), or genes that have been identified for traits involved in drought avoidance (water-use efficiency, cuticular wax synthesis, trichome development and morphology, root system architecture) and drought tolerance (compatible solutes, pre- and post-flowering drought tolerance). Many of these identified genes and QTL regions have not been tested in hybrids and the effect of these genes, or their interactions, on yield must be understood in normal and drought-stressed conditions to understand the strength and weaknesses of their utility.
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Affiliation(s)
| | - Chad M Hayes
- Plant Stress and Germplasm Development Research, USDA-ARS, Lubbock, TX, USA
| | - Joseph E Knoll
- Crop Genetics and Breeding Research Unit, USDA-ARS, Tifton, GA, USA
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364
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Wong GR, Mazumdar P, Lau SE, Harikrishna JA. Ectopic expression of a Musa acuminata root hair defective 3 (MaRHD3) in Arabidopsis enhances drought tolerance. JOURNAL OF PLANT PHYSIOLOGY 2018; 231:219-233. [PMID: 30292098 DOI: 10.1016/j.jplph.2018.09.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 08/14/2018] [Accepted: 09/20/2018] [Indexed: 05/24/2023]
Abstract
Genetic improvement is an important approach for crop improvement towards yield stability in stress-prone areas. Functional analysis of candidate stress response genes can provide key information to allow the selection and modification of improved crop varieties. In this study, the constitutive expression of a banana cDNA, MaRHD3 in Arabidopsis improved the ability of transgenic lines to adapt to drought conditions. Transgenic Arabidopsis plants expressing MaRHD3 had roots with enhanced branching and more root hairs when challenged with drought stress. The MaRHD3 plants had higher biomass accumulation, higher relative water content, higher chlorophyll content and an increase in activity of reactive oxygen species (ROS) scavenging enzymes; SOD, CAT, GR, POD and APX with reduced water loss rates compared to control plants. The analysis of oxidative damage indicated lower cell membrane damage in transgenic lines compared to control plants. These findings, together with data from higher expression of ABF-3 and higher ABA content of drought-stressed transgenic MaRHD3 expressing plants, support the involvement of the ABA signal pathway and ROS scavenging enzyme systems in MaRHD3 mediated drought tolerance.
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Affiliation(s)
- Gwo Rong Wong
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Purabi Mazumdar
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Su-Ee Lau
- Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jennifer Ann Harikrishna
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; Centre for Research in Biotechnology for Agriculture, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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365
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Khan A, Pan X, Najeeb U, Tan DKY, Fahad S, Zahoor R, Luo H. Coping with drought: stress and adaptive mechanisms, and management through cultural and molecular alternatives in cotton as vital constituents for plant stress resilience and fitness. Biol Res 2018; 51:47. [PMID: 30428929 PMCID: PMC6234603 DOI: 10.1186/s40659-018-0198-z] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 11/07/2018] [Indexed: 12/18/2022] Open
Abstract
Increased levels of greenhouse gases in the atmosphere and associated climatic variability is primarily responsible for inducing heat waves, flooding and drought stress. Among these, water scarcity is a major limitation to crop productivity. Water stress can severely reduce crop yield and both the severity and duration of the stress are critical. Water availability is a key driver for sustainable cotton production and its limitations can adversely affect physiological and biochemical processes of plants, leading towards lint yield reduction. Adaptation of crop husbandry techniques suitable for cotton crop requires a sound understanding of environmental factors, influencing cotton lint yield and fiber quality. Various defense mechanisms e.g. maintenance of membrane stability, carbon fixation rate, hormone regulation, generation of antioxidants and induction of stress proteins have been found play a vital role in plant survival under moisture stress. Plant molecular breeding plays a functional role to ascertain superior genes for important traits and can offer breeder ready markers for developing ideotypes. This review highlights drought-induced damage to cotton plants at structural, physiological and molecular levels. It also discusses the opportunities for increasing drought tolerance in cotton either through modern gene editing technology like clustered regularly interspaced short palindromic repeat (CRISPR/Cas9), zinc finger nuclease, molecular breeding as well as through crop management, such as use of appropriate fertilization, growth regulator application and soil amendments.
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Affiliation(s)
- Aziz Khan
- The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, 832003 People’s Republic of China
- Key Laboratory of Plant Genetic and Breeding, College of Agriculture, Guangxi University, Nanning, 530005 People’s Republic of China
| | - Xudong Pan
- The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, 832003 People’s Republic of China
| | - Ullah Najeeb
- Queensland Alliance for Agriculture and Food Innovation, Centre for Plant Science, The University of Queensland, Toowoomba, QLD 4350 Australia
- Plant Breeding Institute, Sydney Institute of Agriculture, School of Life and Environmental Faculty of Science, The University of Sydney, Sydney, NSW 2006 Australia
| | - Daniel Kean Yuen Tan
- Plant Breeding Institute, Sydney Institute of Agriculture, School of Life and Environmental Faculty of Science, The University of Sydney, Sydney, NSW 2006 Australia
| | - Shah Fahad
- Department of Plant Sciences and Technology, Huazhong Agriculture University, Wuhan, 430000 People’s Republic of China
- Department of Agronomy, The University of Swabi, Swabi, Pakistan
- College of Life Science, Linyi University, Linyi, 276000 Shandong China
| | - Rizwan Zahoor
- Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, 210095 People’s Republic of China
| | - Honghai Luo
- The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, 832003 People’s Republic of China
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366
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Brito C, Dinis LT, Meijón M, Ferreira H, Pinto G, Moutinho-Pereira J, Correia C. Salicylic acid modulates olive tree physiological and growth responses to drought and rewatering events in a dose dependent manner. JOURNAL OF PLANT PHYSIOLOGY 2018; 230:21-32. [PMID: 30142470 DOI: 10.1016/j.jplph.2018.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 08/09/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
The predicted accentuation of drought events highlights the importance of optimize plants capacity to tolerate drought, but also the capacity to recovery from it, especially in species, as olive tree (Olea europaea L.), that grows in particularly susceptible regions. Three different concentrations (10, 100 and 1000 μM) of salicylic acid (SA), a stress signaling phytohormone, was sprayed on 3-year-old potted olive trees subjected to three successive drought and rewatering events. Trees responses to SA application are concentration dependent, being 100 μM the most effective concentration to improve drought tolerance and recovery capacity. During drought events, this effectiveness was achieved by osmolytes accumulation, leaf water status maintenance, reduced photosynthetic systems drought-associated damages, and by optimizing shoot/root ratio. The better plant fitness during drought allowed a fast recovery of the physiological functions upon rewatering and reduced the necessity to invest in extra repair damages, allowing the regrowth. The intense abscisic acid (ABA) signal close to upper epidermis in stressed controls suggests a "memory" of the worst water status displayed by those plants. SA attenuated the limitation of total biomass accumulation imposed by drought, mainly in root system, increased water use efficiency and lead to a higher intense signal of indoleacetic acid (IAA) in leaves during recovery period. In summary, in a suitable concentration, SA demonstrate to be a promising tool to increase drought adaptability of olive trees.
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Affiliation(s)
- Cátia Brito
- CITAB - Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Lia-Tânia Dinis
- CITAB - Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Mónica Meijón
- Plant Physiology, Department B.O.S., Faculty of Biology, University of Oviedo, Oviedo, Asturias, Spain
| | - Helena Ferreira
- CITAB - Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Glória Pinto
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - José Moutinho-Pereira
- CITAB - Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Carlos Correia
- CITAB - Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal.
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367
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Dash PK, Rai R, Rai V, Pasupalak S. Drought Induced Signaling in Rice: Delineating Canonical and Non-canonical Pathways. Front Chem 2018; 6:264. [PMID: 30258837 PMCID: PMC6143666 DOI: 10.3389/fchem.2018.00264] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 06/12/2018] [Indexed: 11/13/2022] Open
Abstract
Drought induced stress is often a bottleneck of agricultural crop production. Invariably, field crops across all agro-ecological regions succumb to it with an yield penalty. Drought massively affects the growth and harvestable yield in crops and has become an imminent problem necessitating breeding of tolerant crops. It induces myriad changes of biochemical, molecular, and physiological nature that manifest into aberrant plant morphology. The response to drought in plants incites a signaling cascade that involves perception and translation of drought signal leading to concomitant modulation of gene expression and de novo osmolyte synthesis. The intricate patterns of expression of these genes vary from early induction to late responsive genes. While one class of genes codes for products imparting osmotolerance and protection to plants, the second class predominantly modulates target gene expression by an intricate signal transduction mechanism. This review summarizes both canonical and non-canonical cascades of drought stress response in plants, delineating the mechanism in rice (Oryza sativa) and emphasizes hydropenia induced lipid signaling.
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Affiliation(s)
- Prasanta K. Dash
- ICAR-NRC on Plant Biotechnology, Pusa Institute, New Delhi, India
| | - Rhitu Rai
- ICAR-NRC on Plant Biotechnology, Pusa Institute, New Delhi, India
| | - Vandna Rai
- ICAR-NRC on Plant Biotechnology, Pusa Institute, New Delhi, India
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Cullis C, Chimwamurombe P, Barker N, Kunert K, Vorster J. Orphan Legumes Growing in Dry Environments: Marama Bean as a Case Study. FRONTIERS IN PLANT SCIENCE 2018; 9:1199. [PMID: 30158948 PMCID: PMC6104163 DOI: 10.3389/fpls.2018.01199] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/26/2018] [Indexed: 05/28/2023]
Abstract
Plants have developed morphological, physiological, biochemical, cellular, and molecular mechanisms to survive in drought-stricken environments with little or no water caused by below-average precipitation. In this mini-review, we highlight the characteristics that allows marama bean [Tylosema esculentum (Burchell) Schreiber], an example of an orphan legume native to arid regions of southwestern Southern Africa, to flourish under an inhospitable climate and dry soil conditions where no other agricultural crop competes in this agro-ecological zone. Orphan legumes are often better suited to withstand such harsh growth environments due to development of survival strategies using a combination of different traits and responses. Recent findings on questions on marama bean speciation, hybridization, population dynamics, and the evolutionary history of the bean and mechanisms by which the bean is able to extract and conserve water and nutrients from its environment as well as aspects of morphological and physiological adaptation will be reviewed. The importance of the soil microbiome and the genetic diversity in this species, and their interplay, as a reservoir for improvement will also be considered. In particular, the application of the newly established marama bean genome sequence will facilitate both the identification of important genes involved in the interaction with the soil microbiome and the identification of the diversity within the wild germplasm for genes involved drought tolerance. Since predicted future changes in climatic conditions, with less water availability for plant growth, will severely affect agricultural productivity, an understanding of the mechanisms of unique adaptations in marama bean to such conditions may also provide insights as to how to improve the performance of the major crops.
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Affiliation(s)
- Christopher Cullis
- Department of Biology, Case Western Reserve University, Cleveland, OH, United States
| | - Percy Chimwamurombe
- Department of Natural and Applied Sciences, Namibia University of Science and Technology, Windhoek, Namibia
| | - Nigel Barker
- Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Karl Kunert
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Juan Vorster
- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
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369
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Challabathula D, Zhang Q, Bartels D. Protection of photosynthesis in desiccation-tolerant resurrection plants. JOURNAL OF PLANT PHYSIOLOGY 2018; 227:84-92. [PMID: 29778495 DOI: 10.1016/j.jplph.2018.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 04/30/2018] [Accepted: 05/01/2018] [Indexed: 05/14/2023]
Abstract
Inhibition of photosynthesis is a central, primary response that is observed in both desiccation-tolerant and desiccation-sensitive plants affected by drought stress. Decreased photosynthesis during drought stress can either be due to the limitation of carbon dioxide entry through the stomata and the mesophyll cells, due to increased oxidative stress or due to decreased activity of photosynthetic enzymes. Although the photosynthetic rates decrease in both desiccation-tolerant and sensitive plants during drought, the remarkable difference lies in the complete recovery of photosynthesis after rehydration in desiccation-tolerant plants. Desiccation of sensitive plants leads to irreparable damages of the photosynthetic membranes, in contrast the photosynthetic apparatus is deactivated during desiccation in desiccation-tolerant plants. Desiccation-tolerant plants employ different strategies to protect and/or maintain the structural integrity of the photosynthetic apparatus to reactivate photosynthesis upon water availability. Two major mechanisms are distinguished. Homoiochlorophyllous desiccation-tolerant plants preserve chlorophyll and thylakoid membranes and require active protection mechanisms, while poikilochlorophyllous plants degrade chlorophyll in a regulated manner but then require de novo synthesis during rehydration. Desiccation-tolerant plants, particularly homoiochlorophyllous plants, employ conserved and novel antioxidant enzymes/metabolites to minimize the oxidative damage and to protect the photosynthetic machinery. De novo synthesized, stress-induced proteins in combination with antioxidants are localized in chloroplasts and are important components of the protective network. Genome sequence informations provide some clues on selection of genes involved in protecting photosynthetic structures; e.g. ELIP genes (early light inducible proteins) are enriched in the genomes and more abundantly expressed in homoiochlorophyllous desiccation-tolerant plants. This review focuses on the mechanisms that operate in the desiccation-tolerant plants to protect the photosynthetic apparatus during desiccation.
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Affiliation(s)
- Dinakar Challabathula
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Kirschallee 1, 53115 Bonn, Germany; Department of Life Sciences, School of Basic and Applied Sciences, Central University of Tamil Nadu, Thiruvarur, India
| | - Qingwei Zhang
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Kirschallee 1, 53115 Bonn, Germany
| | - Dorothea Bartels
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, Kirschallee 1, 53115 Bonn, Germany.
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370
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Britto DT, Kronzucker HJ. From aquaporin to ecosystem: Plants in the water cycle. JOURNAL OF PLANT PHYSIOLOGY 2018; 227:1-2. [PMID: 29960803 DOI: 10.1016/j.jplph.2018.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Vascular plants are major intermediaries in the global water cycle, and are highly adapted to both facilitate and resist water fluxes, such as during root uptake, translocation in the xylem, and transpiration by leaves. Here, we summarize the contributions to a Special Issue on water in the Journal of Plant Physiology, which cluster around the theme of control and facilitation of water movement in plants. We conclude with an editorial view of the need for plant physiologists to consider larger cultural issues surrounding water use, especially in terms of the increasing agricultural demand for water to produce animal feed, with its associated trophic nutritive losses and environmental damage.
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Affiliation(s)
- Dev T Britto
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Herbert J Kronzucker
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia.
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371
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Gudys K, Guzy-Wrobelska J, Janiak A, Dziurka MA, Ostrowska A, Hura K, Jurczyk B, Żmuda K, Grzybkowska D, Śróbka J, Urban W, Biesaga-Koscielniak J, Filek M, Koscielniak J, Mikołajczak K, Ogrodowicz P, Krystkowiak K, Kuczyńska A, Krajewski P, Szarejko I. Prioritization of Candidate Genes in QTL Regions for Physiological and Biochemical Traits Underlying Drought Response in Barley ( Hordeum vulgare L.). FRONTIERS IN PLANT SCIENCE 2018; 9:769. [PMID: 29946328 PMCID: PMC6005862 DOI: 10.3389/fpls.2018.00769] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 05/18/2018] [Indexed: 05/27/2023]
Abstract
Drought is one of the most adverse abiotic factors limiting growth and productivity of crops. Among them is barley, ranked fourth cereal worldwide in terms of harvested acreage and production. Plants have evolved various mechanisms to cope with water deficit at different biological levels, but there is an enormous challenge to decipher genes responsible for particular complex phenotypic traits, in order to develop drought tolerant crops. This work presents a comprehensive approach for elucidation of molecular mechanisms of drought tolerance in barley at the seedling stage of development. The study includes mapping of QTLs for physiological and biochemical traits associated with drought tolerance on a high-density function map, projection of QTL confidence intervals on barley physical map, and the retrievement of positional candidate genes (CGs), followed by their prioritization based on Gene Ontology (GO) enrichment analysis. A total of 64 QTLs for 25 physiological and biochemical traits that describe plant water status, photosynthetic efficiency, osmoprotectant and hormone content, as well as antioxidant activity, were positioned on a consensus map, constructed using RIL populations developed from the crosses between European and Syrian genotypes. The map contained a total of 875 SNP, SSR and CGs, spanning 941.86 cM with resolution of 1.1 cM. For the first time, QTLs for ethylene, glucose, sucrose, maltose, raffinose, α-tocopherol, γ-tocotrienol content, and catalase activity, have been mapped in barley. Based on overlapping confidence intervals of QTLs, 11 hotspots were identified that enclosed more than 60% of mapped QTLs. Genetic and physical map integration allowed the identification of 1,101 positional CGs within the confidence intervals of drought response-specific QTLs. Prioritization resulted in the designation of 143 CGs, among them were genes encoding antioxidants, carboxylic acid biosynthesis enzymes, heat shock proteins, small auxin up-regulated RNAs, nitric oxide synthase, ATP sulfurylases, and proteins involved in regulation of flowering time. This global approach may be proposed for identification of new CGs that underlies QTLs responsible for complex traits.
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Affiliation(s)
- Kornelia Gudys
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
- Department of Botany and Nature Protection, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Justyna Guzy-Wrobelska
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Agnieszka Janiak
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Michał A. Dziurka
- Department of Developmental Biology, Institute of Plant Physiology, Polish Academy of Sciences, Krakow, Poland
| | - Agnieszka Ostrowska
- Department of Developmental Biology, Institute of Plant Physiology, Polish Academy of Sciences, Krakow, Poland
| | - Katarzyna Hura
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Barbara Jurczyk
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Katarzyna Żmuda
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Daria Grzybkowska
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Joanna Śróbka
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Wojciech Urban
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Jolanta Biesaga-Koscielniak
- Department of Developmental Biology, Institute of Plant Physiology, Polish Academy of Sciences, Krakow, Poland
| | - Maria Filek
- Department of Developmental Biology, Institute of Plant Physiology, Polish Academy of Sciences, Krakow, Poland
| | - Janusz Koscielniak
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture, Krakow, Poland
| | - Krzysztof Mikołajczak
- Department of Biotechnology, Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Piotr Ogrodowicz
- Department of Biotechnology, Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Karolina Krystkowiak
- Department of Biotechnology, Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
- Department of Plant Functional Metabolomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Anetta Kuczyńska
- Department of Biotechnology, Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Paweł Krajewski
- Department of Biometry and Bioinformatics, Institute of Plant Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Iwona Szarejko
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
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372
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Guo Z, Yang W, Chang Y, Ma X, Tu H, Xiong F, Jiang N, Feng H, Huang C, Yang P, Zhao H, Chen G, Liu H, Luo L, Hu H, Liu Q, Xiong L. Genome-Wide Association Studies of Image Traits Reveal Genetic Architecture of Drought Resistance in Rice. MOLECULAR PLANT 2018; 11:789-805. [PMID: 29614319 DOI: 10.1016/j.molp.2018.03.018] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 02/14/2018] [Accepted: 03/26/2018] [Indexed: 05/19/2023]
Abstract
Understanding how plants respond to drought can benefit drought resistance (DR) breeding. Using a non-destructive phenotyping facility, 51 image-based traits (i-traits) for 507 rice accessions were extracted. These i-traits can be used to monitor drought responses and evaluate DR. High heritability and large variation of these traits was observed under drought stress in the natural population. A genome-wide association study (GWAS) of i-traits and traditional DR traits identified 470 association loci, some containing known DR-related genes. Of these 470 loci, 443 loci (94%) were identified using i-traits, 437 loci (93%) co-localized with previously reported DR-related quantitative trait loci, and 313 loci (66.6%) were reproducibly identified by GWAS in different years. Association networks, established based on GWAS results, revealed hub i-traits and hub loci. This demonstrates the feasibility and necessity of dissecting the complex DR trait into heritable and simple i-traits. As proof of principle, we illustrated the power of this integrated approach to identify previously unreported DR-related genes. OsPP15 was associated with a hub i-trait, and its role in DR was confirmed by genetic transformation experiments. Furthermore, i-traits can be used for DR linkage analyses, and 69 i-trait locus associations were identified by both GWAS and linkage analysis of a recombinant inbred line population. Finally, we confirmed the relevance of i-traits to DR in the field. Our study provides a promising novel approach for the genetic dissection and discovery of causal genes for DR.
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Affiliation(s)
- Zilong Guo
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Wanneng Yang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Agricultural Bioinformatics, Huazhong Agricultural University, Wuhan 430070, China; College of Engineering, Huazhong Agricultural University, Wuhan 430070, China.
| | - Yu Chang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaosong Ma
- Shanghai Agrobiological Gene Center, Shanghai 201106, China
| | - Haifu Tu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Fang Xiong
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Ni Jiang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hui Feng
- Hubei Key Laboratory of Agricultural Bioinformatics, Huazhong Agricultural University, Wuhan 430070, China
| | - Chenglong Huang
- College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
| | - Peng Yang
- College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
| | - Hu Zhao
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Guoxing Chen
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, Huazhong Agricultural University, Wuhan 430070, China
| | - Hongyan Liu
- Shanghai Agrobiological Gene Center, Shanghai 201106, China
| | - Lijun Luo
- Shanghai Agrobiological Gene Center, Shanghai 201106, China
| | - Honghong Hu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Qian Liu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lizhong Xiong
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China.
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373
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Anupama A, Bhugra S, Lall B, Chaudhury S, Chugh A. Assessing the correlation of genotypic and phenotypic responses of indica rice varieties under drought stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 127:343-354. [PMID: 29655154 DOI: 10.1016/j.plaphy.2018.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
Drought is one of the severe abiotic stress that affects the productivity of rice, an important staple crop that is consumed all over the world. The traits responsible for enhancing or adapting drought resistance in rice plants can be selected and studied to improve their growth under stress conditions. Experiments have been conducted on indica rice varieties comprising Sahabhagidhan as drought tolerant variety and IR64, MTU1010 categorized as drought sensitive varieties. Various root related biochemical and morphological traits such as root length, relative water content (RWC), xylem number, xylem area, proline content, and malondialdehyde content have been investigated for a comparative study of the plant response to drought stress in different rice varieties. The results of differential root transcriptome analysis have revealed that there is a notable difference in gene expression of OsPIP2;5 and OsNIP2;1 in various indica varieties of rice at different time periods of stress. The present work aims at assessing the correlation between genotypic and phenotypic traits that can contribute towards the emerging field of rice phenomics.
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Affiliation(s)
- Anupama Anupama
- Kusuma School of Biological Sciences, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Swati Bhugra
- Department of Electrical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Brejesh Lall
- Department of Electrical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Santanu Chaudhury
- Department of Electrical Engineering, Indian Institute of Technology, Delhi, New Delhi 110016, India.
| | - Archana Chugh
- Kusuma School of Biological Sciences, Indian Institute of Technology, Delhi, New Delhi 110016, India.
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374
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Vigani G, Rolli E, Marasco R, Dell'Orto M, Michoud G, Soussi A, Raddadi N, Borin S, Sorlini C, Zocchi G, Daffonchio D. Root bacterial endophytes confer drought resistance and enhance expression and activity of a vacuolar H + -pumping pyrophosphatase in pepper plants. Environ Microbiol 2018; 21:3212-3228. [PMID: 29786171 DOI: 10.1111/1462-2920.14272] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 05/03/2018] [Accepted: 05/07/2018] [Indexed: 11/29/2022]
Abstract
It has been previously shown that the transgenic overexpression of the plant root vacuolar proton pumps H+ -ATPase (V-ATPase) and H+ -PPase (V-PPase) confer tolerance to drought. Since plant-root endophytic bacteria can also promote drought tolerance, we hypothesize that such promotion can be associated to the enhancement of the host vacuolar proton pumps expression and activity. To test this hypothesis, we selected two endophytic bacteria endowed with an array of in vitro plant growth promoting traits. Their genome sequences confirmed the presence of traits previously shown to confer drought resistance to plants, such as the synthesis of nitric oxide and of organic volatile organic compounds. We used the two strains on pepper (Capsicuum annuum L.) because of its high sensitivity to drought. Under drought conditions, both strains stimulated a larger root system and enhanced the leaves' photosynthetic activity. By testing the expression and activity of the vacuolar proton pumps, H+ -ATPase (V-ATPase) and H+ -PPase (V-PPase), we found that bacterial colonization enhanced V-PPase only. We conclude that the enhanced expression and activity of V-PPase can be favoured by the colonization of drought-tolerance-inducing bacterial endophytes.
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Affiliation(s)
- Gianpiero Vigani
- Department of Life Sciences and Systems Biology, University of Turin, Plant Physiology Unit, 10135, Turin, Italy
| | - Eleonora Rolli
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, 20133, Milan, Italy
| | - Ramona Marasco
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Marta Dell'Orto
- Department of Agricultural and Environmental Sciences, Production, Landscape, Agroenergy (DISAA), University of Milan, 20133, Milan, Italy
| | - Grégoire Michoud
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Asma Soussi
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Noura Raddadi
- Department of Civil, Alma Mater Studiorum University of Bologna, Chemical, Environmental and Materials Engineering (DICAM), Bologna, Italy
| | - Sara Borin
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, 20133, Milan, Italy
| | - Claudia Sorlini
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, 20133, Milan, Italy
| | - Graziano Zocchi
- Department of Agricultural and Environmental Sciences, Production, Landscape, Agroenergy (DISAA), University of Milan, 20133, Milan, Italy
| | - Daniele Daffonchio
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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375
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Goñi O, Quille P, O'Connell S. Ascophyllum nodosum extract biostimulants and their role in enhancing tolerance to drought stress in tomato plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 126:63-73. [PMID: 29501894 DOI: 10.1016/j.plaphy.2018.02.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 02/21/2018] [Accepted: 02/22/2018] [Indexed: 05/21/2023]
Abstract
Global changes in climate are leading to increased occurrence and duration of drought episodes with concurrent reduction in crop yields. Expansion of the irrigated land area does not appear to be a viable solution in many regions to deliver crop productivity. The development of crop drought tolerance traits by either genetic modification or plant breeding represent the principal approaches to meeting this challenge to date. Biostimulants are an emerging category of crop management products which can enhance crop productivity under abiotic stress conditions. The ability of some biostimulant products such as Ascophyllum nodosum extracts (ANE) to enhance the tolerance of crops to drought stress has been observed by growers. The objective of this study was to investigate if different commercial ANE biostimulants provided the same tolerance to tomato plants (cv. Moneymaker) subjected to a defined drought period. A compositional characterisation of the key macromolecules of ANEs was performed. In addition, the role of ANE biostimulants in inducing changes of chlorophyll and osmolytes levels, MDA production, dehydrin isoform pattern and dehydrin gene expression levels was assessed. The three ANE biostimulants evaluated were found to provide different levels of tolerance to drought stressed tomato plants. The level of drought tolerance provided was related to changes in the concentration of osmolytes and expression of tas14 dehydrin gene. Taken together, our results highlight that despite the fact all ANE biostimulants were manufactured from the same raw material, their ability to maintain crop productivity during and after drought stress was not the same.
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Affiliation(s)
- Oscar Goñi
- Plant Biostimulant Group, Shannon Applied Biotechnology Centre, Institute of Technology Tralee, Clash, Tralee, Co. Kerry, Ireland
| | - Patrick Quille
- Plant Biostimulant Group, Shannon Applied Biotechnology Centre, Institute of Technology Tralee, Clash, Tralee, Co. Kerry, Ireland
| | - Shane O'Connell
- Plant Biostimulant Group, Shannon Applied Biotechnology Centre, Institute of Technology Tralee, Clash, Tralee, Co. Kerry, Ireland.
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376
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Duan L, Han J, Guo Z, Tu H, Yang P, Zhang D, Fan Y, Chen G, Xiong L, Dai M, Williams K, Corke F, Doonan JH, Yang W. Novel Digital Features Discriminate Between Drought Resistant and Drought Sensitive Rice Under Controlled and Field Conditions. FRONTIERS IN PLANT SCIENCE 2018; 9:492. [PMID: 29719548 PMCID: PMC5913589 DOI: 10.3389/fpls.2018.00492] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 04/03/2018] [Indexed: 05/21/2023]
Abstract
Dynamic quantification of drought response is a key issue both for variety selection and for functional genetic study of rice drought resistance. Traditional assessment of drought resistance traits, such as stay-green and leaf-rolling, has utilized manual measurements, that are often subjective, error-prone, poorly quantified and time consuming. To relieve this phenotyping bottleneck, we demonstrate a feasible, robust and non-destructive method that dynamically quantifies response to drought, under both controlled and field conditions. Firstly, RGB images of individual rice plants at different growth points were analyzed to derive 4 features that were influenced by imposition of drought. These include a feature related to the ability to stay green, which we termed greenness plant area ratio (GPAR) and 3 shape descriptors [total plant area/bounding rectangle area ratio (TBR), perimeter area ratio (PAR) and total plant area/convex hull area ratio (TCR)]. Experiments showed that these 4 features were capable of discriminating reliably between drought resistant and drought sensitive accessions, and dynamically quantifying the drought response under controlled conditions across time (at either daily or half hourly time intervals). We compared the 3 shape descriptors and concluded that PAR was more robust and sensitive to leaf-rolling than the other shape descriptors. In addition, PAR and GPAR proved to be effective in quantification of drought response in the field. Moreover, the values obtained in field experiments using the collection of rice varieties were correlated with those derived from pot-based experiments. The general applicability of the algorithms is demonstrated by their ability to probe archival Miscanthus data previously collected on an independent platform. In conclusion, this image-based technology is robust providing a platform-independent tool for quantifying drought response that should be of general utility for breeding and functional genomics in future.
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Affiliation(s)
- Lingfeng Duan
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Jiwan Han
- National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - Zilong Guo
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Haifu Tu
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Peng Yang
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Dong Zhang
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Yuan Fan
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Guoxing Chen
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Lizhong Xiong
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Mingqiu Dai
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
| | - Kevin Williams
- National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - Fiona Corke
- National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - John H. Doonan
- National Plant Phenomics Centre, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - Wanneng Yang
- National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research, Agricultural Bioinformatics Key Laboratory of Hubei Province, College of Engineering, Huazhong Agricultural University, Wuhan, China
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377
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Drought delays development of the sorghum root microbiome and enriches for monoderm bacteria. Proc Natl Acad Sci U S A 2018; 115:E4284-E4293. [PMID: 29666229 PMCID: PMC5939072 DOI: 10.1073/pnas.1717308115] [Citation(s) in RCA: 252] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Drought remains a critical obstacle to meeting the food demands of the coming century. Understanding the interplay between drought stress, plant development, and the plant microbiome is central to meeting this challenge. Here, we demonstrate that drought causes enrichment of a distinct set of microbes in roots, composed almost entirely of monoderms, which lack outer membranes and have thick cell walls. We demonstrate that under drought, roots increase the production of many metabolites, and that monoderms inhabiting the drought-treated rhizosphere exhibit increased activity of transporters connected with some of these same compounds. The discovery of this drought-induced enrichment and associated shifts in metabolite exchange between plant and microbe reveal a potential blueprint for manipulating plant microbiomes for improved crop fitness. Drought stress is a major obstacle to crop productivity, and the severity and frequency of drought are expected to increase in the coming century. Certain root-associated bacteria have been shown to mitigate the negative effects of drought stress on plant growth, and manipulation of the crop microbiome is an emerging strategy for overcoming drought stress in agricultural systems, yet the effect of drought on the development of the root microbiome is poorly understood. Through 16S rRNA amplicon and metatranscriptome sequencing, as well as root metabolomics, we demonstrate that drought delays the development of the early sorghum root microbiome and causes increased abundance and activity of monoderm bacteria, which lack an outer cell membrane and contain thick cell walls. Our data suggest that altered plant metabolism and increased activity of bacterial ATP-binding cassette (ABC) transporter genes are correlated with these shifts in community composition. Finally, inoculation experiments with monoderm isolates indicate that increased colonization of the root during drought can positively impact plant growth. Collectively, these results demonstrate the role that drought plays in restructuring the root microbiome and highlight the importance of temporal sampling when studying plant-associated microbiomes.
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378
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Cyriac D, Hofmann RW, Stewart A, Sathish P, Winefield CS, Moot DJ. Intraspecific differences in long-term drought tolerance in perennial ryegrass. PLoS One 2018; 13:e0194977. [PMID: 29617413 PMCID: PMC5884532 DOI: 10.1371/journal.pone.0194977] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 03/14/2018] [Indexed: 11/18/2022] Open
Abstract
Lolium perenne L. (perennial ryegrass) is the most important pasture grass species in temperate regions of the world. However, its growth is restricted in summer dry environments. Germplasm screening can be used to identify accessions or individual plants for incorporation into breeding programs for drought tolerance. We selected nine perennial ryegrass accessions from different global origins and from a range of climatic and environmental conditions. In addition, the perennial ryegrass cultivar ‘Grasslands Impact’ was chosen as a reference. The accessions were grown for 360 days in a controlled environment through six consecutive drought stress and recovery cycles. We observed intraspecific differences in drought stress responsiveness for shoot biomass and survival from the third stress cycle. An accession from Norway had 50% more shoot dry matter than the next best-performing accession after six drought cycles. Compared with the reference cultivar ‘Grasslands Impact’, shoot dry matter of the accession from Norway was more than seven times higher after six drought cycles, indicating superior performance of this ecotype under drought stress. Drought tolerance was characterized by osmotic adjustment and higher relative leaf water content at low soil moisture levels. Furthermore, the findings of this study identify solute potential as an early predictor of drought stress tolerance. These intraspecific differences can be used in breeding programs for the development of drought-tolerant perennial ryegrass cultivars.
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Affiliation(s)
- Daliya Cyriac
- Agriculture and Life Sciences Division, Lincoln University, Lincoln, Christchurch, Canterbury, New Zealand
- * E-mail: (DC); (RH)
| | - Rainer W. Hofmann
- Agriculture and Life Sciences Division, Lincoln University, Lincoln, Christchurch, Canterbury, New Zealand
- * E-mail: (DC); (RH)
| | - Alan Stewart
- PGG-Wrightson, Christchurch, Canterbury, New Zealand
| | | | - Christopher S. Winefield
- Agriculture and Life Sciences Division, Lincoln University, Lincoln, Christchurch, Canterbury, New Zealand
| | - Derrick J. Moot
- Agriculture and Life Sciences Division, Lincoln University, Lincoln, Christchurch, Canterbury, New Zealand
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379
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Jin M, Guo M, Yue G, Li J, Yang S, Zhao P, Su Y. An unusual strategy of stomatal control in the desert shrub Ammopiptanthus mongolicus. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 125:13-26. [PMID: 29413627 DOI: 10.1016/j.plaphy.2018.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/05/2018] [Accepted: 01/22/2018] [Indexed: 05/27/2023]
Abstract
Water deficit is one of the main environmental constraints that limit plant growth. Accordingly, plants evoke rather complex strategies to respond and/or acclimate to such frustrating circumstances. Due to insufficient understandings of acclimatory mechanisms of plants' tolerance to persistent water deficit, a desert shrub of an ancient origin, Ammopiptanthus mongolicus, has recently attracted growing attentions. Differed from Arabidopsis, the opening of stomata of A. mongolicus is constrained by low external K+ concentration of the guard cells. Although as a general consequence, a raised level of ABA is also induced in A. mongolicus following water deficit, this does not accordingly result in efficient stomatal closure. In consistent with this phenomenon, the expression of genes coding for the negative regulators of the ABA signaling cascade-the type 2C protein phosphatases (PP2Cs) are notably induced, whereas the transcription of the downstream SnRK2 protein kinase genes or the destination ion fluxing channel genes remain almost unaffected under water deficit treatments. Therefore, in term of stomatal control in response to water deficit, A. mongolicus seemingly employs an unusual strategy: a constrained stomatal opening controlled by extracellular K+ concentrations rather than a prompt stomatal closure triggered by ABA-induced signaling pathway. Additionally, an acute accumulation of proline is induced by water deficit which may partly compromise the activation of antioxidant enzymes in A. mongolicus. Such strategy of stomatal control found in A. mongolicus may in certain extents, reflect the acclimatory divergence for plants' coping with persistent stress of water deficit.
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Affiliation(s)
- Man Jin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Manyuan Guo
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Guangzhen Yue
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China
| | - Junlin Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Shunying Yang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China
| | - Pengshu Zhao
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yanhua Su
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No. 71, East Beijing Road, Nanjing, China.
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380
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Drought Sensitivity of Norway Spruce at the Species' Warmest Fringe: Quantitative and Molecular Analysis Reveals High Genetic Variation Among and Within Provenances. G3-GENES GENOMES GENETICS 2018; 8:1225-1245. [PMID: 29440346 PMCID: PMC5873913 DOI: 10.1534/g3.117.300524] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Norway spruce (Picea abies) is by far the most important timber species in Europe, but its outstanding role in future forests is jeopardized by its high sensitivity to drought. We analyzed drought response of Norway spruce at the warmest fringe of its natural range. Based on a 35-year old provenance experiment we tested for genetic variation among and within seed provenances across consecutively occurring strong drought events using dendroclimatic time series. Moreover, we tested for associations between ≈1,700 variable SNPs and traits related to drought response, wood characteristics and climate-growth relationships. We found significant adaptive genetic variation among provenances originating from the species’ Alpine, Central and Southeastern European range. Genetic variation between individuals varied significantly among provenances explaining up to 44% of the phenotypic variation in drought response. Varying phenotypic correlations between drought response and wood traits confirmed differences in selection intensity among seed provenances. Significant associations were found between 29 SNPs and traits related to drought, climate-growth relationships and wood properties which explained between 11 and 43% of trait variation, though 12 of them were due to single individuals having extreme phenotypes of the respective trait. The majority of these SNPs are located within exons of genes and the most important ones are preferentially expressed in cambium and xylem expansion layers. Phenotype-genotype associations were stronger if only provenances with significant quantitative genetic variation in drought response were considered. The present study confirms the high adaptive variation of Norway spruce in Central and Southeastern Europe and demonstrates how quantitative genetic, dendroclimatic and genomic data can be linked to understand the genetic basis of adaptation to climate extremes in trees.
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381
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Gallino JP, Ruibal C, Casaretto E, Fleitas AL, Bonnecarrère V, Borsani O, Vidal S. A Dehydration-Induced Eukaryotic Translation Initiation Factor iso4G Identified in a Slow Wilting Soybean Cultivar Enhances Abiotic Stress Tolerance in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2018; 9:262. [PMID: 29552022 PMCID: PMC5840855 DOI: 10.3389/fpls.2018.00262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 02/14/2018] [Indexed: 05/31/2023]
Abstract
Water is usually the main limiting factor for soybean productivity worldwide and yet advances in genetic improvement for drought resistance in this crop are still limited. In the present study, we investigated the physiological and molecular responses to drought in two soybean contrasting genotypes, a slow wilting N7001 and a drought sensitive TJS2049 cultivars. Measurements of stomatal conductance, carbon isotope ratios and accumulated dry matter showed that N7001 responds to drought by employing mechanisms resulting in a more efficient water use than TJS2049. To provide an insight into the molecular mechanisms that these cultivars employ to deal with water stress, their early and late transcriptional responses to drought were analyzed by suppression subtractive hybridization. A number of differentially regulated genes from N7001 were identified and their expression pattern was compared between in this genotype and TJS2049. Overall, the data set indicated that N7001 responds to drought earlier than TJ2049 by up-regulating a larger number of genes, most of them encoding proteins with regulatory and signaling functions. The data supports the idea that at least some of the phenotypic differences between slow wilting and drought sensitive plants may rely on the regulation of the level and timing of expression of specific genes. One of the genes that exhibited a marked N7001-specific drought induction profile encoded a eukaryotic translation initiation factor iso4G (GmeIFiso4G-1a). GmeIFiso4G-1a is one of four members of this protein family in soybean, all of them sharing high sequence identity with each other. In silico analysis of GmeIFiso4G-1 promoter sequences suggested a possible functional specialization between distinct family members, which can attain differences at the transcriptional level. Conditional overexpression of GmeIFiso4G-1a in Arabidopsis conferred the transgenic plants increased tolerance to osmotic, salt, drought and low temperature stress, providing a strong experimental evidence for a direct association between a protein of this class and general abiotic stress tolerance mechanisms. Moreover, the results of this work reinforce the importance of the control of protein synthesis as a central mechanism of stress adaptation and opens up for new strategies for improving crop performance under stress.
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Affiliation(s)
- Juan P. Gallino
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Cecilia Ruibal
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Esteban Casaretto
- Laboratorio de Bioquímica, Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay
| | - Andrea L. Fleitas
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Victoria Bonnecarrère
- Unidad de Biotecnología, Instituto Nacional de Investigación Agropecuaria, Montevideo, Uruguay
| | - Omar Borsani
- Laboratorio de Bioquímica, Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay
| | - Sabina Vidal
- Laboratorio de Biología Molecular Vegetal, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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382
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Park YC, Chapagain S, Jang CS. A Negative Regulator in Response to Salinity in Rice: Oryza sativa Salt-, ABA- and Drought-Induced RING Finger Protein 1 (OsSADR1). PLANT & CELL PHYSIOLOGY 2018; 59:575-589. [PMID: 29361060 DOI: 10.1093/pcp/pcy009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 01/12/2018] [Indexed: 05/20/2023]
Abstract
RING (Really Interesting New Gene) finger proteins play crucial roles in abiotic stress responses in plants. We report the RING finger E3 ligase gene, an Oryza sativa salt, ABA and drought stress-induced RING finger protein 1 gene (OsSADR1). We demonstrated that although OsSAR1 possesses E3 ligase activity, a single amino acid substitution (OsSADR1C168A) in the RING domain resulted in no E3 ligase activity, suggesting that the activity of most E3s is specified by the RING domain. Additional assays substantiated that OsSADR1 interacts with three substrates-no E3 ligase acti and OsPIRIN, and mediates their proteolysis via the 26S proteasome pathway. For OsSADR1, approximately 62% of the transient signals were in the cytosol and 38% in the nucleus. However, transiently expressed OsSADR1 was primarily expressed in the nucleus (70%) in 200 mM salt-treated rice protoplasts. The two nucleus-localized proteins (OsSNAC2 and OsGRAS44) interacted with OsSADR1 in the cytosol and nucleus. Heterogeneous overexpression of OsSADR1 in Arabidopsis resulted in sensitive phenotypes for salt- and mannitol-responsive seed germination and seedling growth. With ABA, OsSADR1 overexpression in plants produced highly tolerant phenotypes, with morphological changes in root length and stomatal closure. The ABA-tolerant transgenic plants also showed hypersensitivity phenotypes under severe water deficit conditions. Taken together, OsSADR1 may act as a regulator in abiotic stress responses by modulating target protein levels.
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Affiliation(s)
- Yong Chan Park
- Plant Genomics Lab, Department of Applied Plant Sciences, Kangwon National University, Chuncheon 200-713, Republic of Korea
| | - Sandeep Chapagain
- Plant Genomics Lab, Department of Applied Plant Sciences, Kangwon National University, Chuncheon 200-713, Republic of Korea
| | - Cheol Seong Jang
- Plant Genomics Lab, Department of Applied Plant Sciences, Kangwon National University, Chuncheon 200-713, Republic of Korea
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383
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Zhang C, Shi S. Physiological and Proteomic Responses of Contrasting Alfalfa ( Medicago sativa L.) Varieties to PEG-Induced Osmotic Stress. FRONTIERS IN PLANT SCIENCE 2018; 9:242. [PMID: 29541085 PMCID: PMC5835757 DOI: 10.3389/fpls.2018.00242] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/12/2018] [Indexed: 05/23/2023]
Abstract
Drought severely limits global plant distribution and agricultural production. Elucidating the physiological and molecular mechanisms governing alfalfa stress responses will contribute to the improvement of drought tolerance in leguminous crops. In this study, the physiological and proteomic responses of two alfalfa (Medicago sativa L.) varieties contrasting in drought tolerance, Longzhong (drought-tolerant) and Gannong No. 3 (drought-sensitive), were comparatively assayed when seedlings were exposed to -1.2 MPa polyethylene glycol (PEG-6000) treatments for 15 days. The results showed that the levels of proline, malondialdehyde (MDA), hydrogen peroxide (H2O2), hydroxyl free radical (OH•) and superoxide anion free radical (O2•-) in both varieties were significantly increased, while the root activity, the superoxide dismutase (SOD) and glutathione reductase (GR) activities, and the ratios of reduced/oxidized ascorbate (AsA/DHA) and reduced/oxidized glutathione (GSH/GSSG) were significantly decreased. The soluble protein and soluble sugar contents, the total antioxidant capability (T-AOC) and the activities of peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) first increased and then decreased with the increase in treatment days. Under osmotic stress, Longzhong exhibited lower levels of MDA, H2O2, OH• and O2•- but higher levels of SOD, CAT, APX, T-AOC and ratios of AsA/DHA and GSH/GSSG compared with Gannong No.3. Using isobaric tags for relative and absolute quantification (iTRAQ), 142 differentially accumulated proteins (DAPs) were identified from two alfalfa varieties, including 52 proteins (34 up-regulated and 18 down-regulated) in Longzhong, 71 proteins (28 up-regulated and 43 down-regulated) in Gannong No. 3, and 19 proteins (13 up-regulated and 6 down-regulated) shared by both varieties. Most of these DAPs were involved in stress and defense, protein metabolism, transmembrane transport, signal transduction, as well as cell wall and cytoskeleton metabolism. In conclusion, the stronger drought-tolerance of Longzhong was attributed to its higher osmotic adjustment capacity, greater ability to orchestrate its enzymatic and non-enzymatic antioxidant systems and thus avoid great oxidative damage in comparison to Gannong No. 3. Moreover, the involvement of other pathways, including carbohydrate metabolism, ROS detoxification, secondary metabolism, protein processing, ion and water transport, signal transduction, and cell wall adjustment, are important mechanisms for conferring drought tolerance in alfalfa.
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Affiliation(s)
- Cuimei Zhang
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, China
| | - Shangli Shi
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Pratacultural Engineering Laboratory of Gansu Province, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Gansu Agricultural University, Lanzhou, China
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384
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Yadav R, Lone SA, Gaikwad K, Singh NK, Padaria JC. Transcriptome sequence analysis and mining of SSRs in Jhar Ber (Ziziphus nummularia (Burm.f.) Wight & Arn) under drought stress. Sci Rep 2018; 8:2406. [PMID: 29402924 PMCID: PMC5799245 DOI: 10.1038/s41598-018-20548-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 01/02/2018] [Indexed: 11/09/2022] Open
Abstract
Ziziphus nummularia (Burm.f.) Wight & Arn., a perennial shrub that thrives in the arid regions, is naturally tolerant to drought. However, there are limited studies on the genomics of drought tolerance in Ziziphus sp. In this study, RNA-sequencing of one month old seedlings treated with PEG 6000 was performed using Roche GS-FLX454 Titanium pyrosequencing. A total of 367,176 raw sequence reads were generated, and upon adapter trimming and quality filtration 351,872 reads were assembled de novo into 32,739 unigenes. Further characterization of the unigenes indicated that 73.25% had significant hits in the protein database. Kyoto encyclopedia of genes and genomes database (KEGG) identified 113 metabolic pathways from the obtained unigenes. A large number of drought-responsive genes were obtained and among them differential gene expression of 16 highly induced genes was validated by qRT-PCR analysis. To develop genic-markers, 3,425 simple sequence repeats (SSRs) were identified in 2,813 unigene sequences. The data generated shall serve as an important reservoir for the identification and characterization of drought stress responsive genes for development of drought tolerant crops.
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Affiliation(s)
- Radha Yadav
- Biotechnology and Climate Change Group, National Research Centre on Plant Biotechnology (ICAR-NRCPB), New Delhi, 110012, India
| | - Showkat Ahmad Lone
- Biotechnology and Climate Change Group, National Research Centre on Plant Biotechnology (ICAR-NRCPB), New Delhi, 110012, India
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Kishor Gaikwad
- Biotechnology and Climate Change Group, National Research Centre on Plant Biotechnology (ICAR-NRCPB), New Delhi, 110012, India
| | - Nagendra Kumar Singh
- Biotechnology and Climate Change Group, National Research Centre on Plant Biotechnology (ICAR-NRCPB), New Delhi, 110012, India
| | - Jasdeep Chatrath Padaria
- Biotechnology and Climate Change Group, National Research Centre on Plant Biotechnology (ICAR-NRCPB), New Delhi, 110012, India.
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385
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Liu X, Li L, Li M, Su L, Lian S, Zhang B, Li X, Ge K, Li L. AhGLK1 affects chlorophyll biosynthesis and photosynthesis in peanut leaves during recovery from drought. Sci Rep 2018. [PMID: 29396501 DOI: 10.1038/s41598-018-20542-20547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
Peanut is an important edible oil crop plant whose quality and yield are greatly affected by drought. The process and molecular mechanisms of recovery from drought are also critical to its productivity, but are currently poorly characterized. Here, we investigate the involvement of peanut AhGLK1 in recovery from drought, and in particular its relationship with AhPORA, which encodes a key enzyme in chlorophyll biosynthesis. We found that chlorophyll content, chlorophyll fluorescence, AhPORA protein level and genes related to chlorophyll biosynthesis and photosynthesis declined markedly under drought conditions, but all increased during recovery. Consistent with this, AhGLK1 expression decreased during water stress and increased when the stress was removed. When AhGLK1 was transformed into Arabidopsis glk1glk2 mutant, it increased the survival rate of the mutant during recovery from drought and fully rescued the mutant's pale-green phenotype. In addition, chlorophyll content and fluorescence, and the expression of genes related to chlorophyll biosynthesis and photosynthesis, were all increased. Bioinformatics analysis and experimental evidence suggested that AhGLK1 augments the expression of AhPORA by binding to its promoter. Our findings confirm that AhGLK1 plays a role as a transcription factor that upregulates expression of AhPORA during post-drought recovery, thereby stimulating chlorophyll biosynthesis and photosynthesis.
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Affiliation(s)
- Xing Liu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Limei Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Meijuan Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Liangchen Su
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Siman Lian
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Baihong Zhang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Xiaoyun Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Kui Ge
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Ling Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China.
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386
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Liu X, Li L, Li M, Su L, Lian S, Zhang B, Li X, Ge K, Li L. AhGLK1 affects chlorophyll biosynthesis and photosynthesis in peanut leaves during recovery from drought. Sci Rep 2018; 8:2250. [PMID: 29396501 PMCID: PMC5796971 DOI: 10.1038/s41598-018-20542-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 01/22/2018] [Indexed: 01/01/2023] Open
Abstract
Peanut is an important edible oil crop plant whose quality and yield are greatly affected by drought. The process and molecular mechanisms of recovery from drought are also critical to its productivity, but are currently poorly characterized. Here, we investigate the involvement of peanut AhGLK1 in recovery from drought, and in particular its relationship with AhPORA, which encodes a key enzyme in chlorophyll biosynthesis. We found that chlorophyll content, chlorophyll fluorescence, AhPORA protein level and genes related to chlorophyll biosynthesis and photosynthesis declined markedly under drought conditions, but all increased during recovery. Consistent with this, AhGLK1 expression decreased during water stress and increased when the stress was removed. When AhGLK1 was transformed into Arabidopsis glk1glk2 mutant, it increased the survival rate of the mutant during recovery from drought and fully rescued the mutant’s pale-green phenotype. In addition, chlorophyll content and fluorescence, and the expression of genes related to chlorophyll biosynthesis and photosynthesis, were all increased. Bioinformatics analysis and experimental evidence suggested that AhGLK1 augments the expression of AhPORA by binding to its promoter. Our findings confirm that AhGLK1 plays a role as a transcription factor that upregulates expression of AhPORA during post-drought recovery, thereby stimulating chlorophyll biosynthesis and photosynthesis.
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Affiliation(s)
- Xing Liu
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Limei Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Meijuan Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Liangchen Su
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Siman Lian
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Baihong Zhang
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Xiaoyun Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Kui Ge
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Ling Li
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, China.
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387
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Yusuf CYL, Abdullah JO, Shaharuddin NA, Abu Seman I, Abdullah MP. Characterization of promoter of EgPAL1, a novel PAL gene from the oil palm Elaeis guineensis Jacq. PLANT CELL REPORTS 2018; 37:265-278. [PMID: 29090330 DOI: 10.1007/s00299-017-2228-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 10/18/2017] [Indexed: 06/07/2023]
Abstract
The oil palm EgPAL1 gene promoter and its regulatory region were functional as a promoter in the heterologous system of Arabidopsis according to the cis-acting elements present in that region. The promoter was developmentally regulated, vascular tissue specific and responsive to water stress agents. Phenylalanine ammonia lyase (PAL, EC 4.3.1.24) is the key enzyme of the phenylpropanoid pathway which plays important roles in plant development and adaptation. To date, there is no report on the study of PAL from oil palm (Elaeis guineensis), an economically important oil crop. In this study, the 5' regulatory sequence of a highly divergent oil palm PAL gene (EgPAL1) was isolated and fused with GUS in Arabidopsis to create two transgenic plants carrying the minimal promoter with (2302 bp) and without its regulatory elements (139 bp). The regulatory sequence contained cis-acting elements known to be important for plant development and stress response including the AC-II element for lignin biosynthesis and several stress responsive elements. The promoter and its regulatory region were fully functional in Arabidopsis. Its activities were characterised by two common fundamental features of PAL which are responsive to plant internal developmental programme and external factors. The promoter was developmentally regulated in certain organs; highly active in young organs but less active or inactive in mature organs. The presence of the AC elements and global activity of the EgPAL1 promoter in all organs resembled the property of lignin-related genes. The existence of the MBS element and enhancement of the promoter activity by PEG reflected the behaviour of drought-responsive genes. Our findings provide a platform for evaluating oil palm gene promoters in the heterologous system of Arabidopsis and give insights into the activities of EgPAL1 promoter in oil palm.
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Affiliation(s)
- Chong Yu Lok Yusuf
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
- Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA, Kampus Jasin, 77300, Merlimau, Melaka, Malaysia
| | - Janna Ong Abdullah
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Noor Azmi Shaharuddin
- Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
- Institute of Plantation Studies, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Idris Abu Seman
- Malaysian Palm Oil Board (MPOB), No. 6, Persiaran Institusi, Bandar Baru Bangi, 43000, Kajang, Selangor, Malaysia
| | - Mohd Puad Abdullah
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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388
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Yu JQ, Wang JH, Sun CH, Zhang QY, Hu DG, Hao YJ. Ectopic expression of the apple nucleus-encoded thylakoid protein MdY3IP1 triggers early-flowering and enhanced salt-tolerance in Arabidopsis thaliana. BMC PLANT BIOLOGY 2018; 18:18. [PMID: 29352810 PMCID: PMC5775602 DOI: 10.1186/s12870-018-1232-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 01/11/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND The roles in photosystem I (PSI) assembly of the nucleus-encoded thylakoid protein Y3IP1 who interacts with the plastid-encoded Ycf3 protein that has been well-characterized in plants. However, its function and potential mechanisms in other aspects remain poorly understood. RESULTS We identified the apple MdY3IP1 gene, which encodes a protein highly homologous to the Arabidopsis Y3IP1 (AtY3IP1). Ectopic expression of MdY3IP1 triggered early-flowering and enhanced salt tolerance in Arabidopsis plants. MdY3IP1 controlled floral transition by accelerating sugar metabolism process in plant cells, thereby influencing the expression of flowering-associated genes. The increase in salt stress tolerance in MdY3IP1-expressing plants correlated with reduced reactive oxygen species (ROS) accumulation, and an increase in lateral root development by regulating both auxin biosynthesis and transport, as followed by enhancement of salt tolerance in Arabidopsis. Overall, these findings provide new evidences for additional functions of Y3IP1-like proteins and their underlying mechanisms of which Y3IP1 confers early-flowering and salt tolerance phenotypes in plants. CONCLUSIONS These observations suggest that plant growth and stress resistance can be affected by the regulation of the MdY3IP1 gene. Further molecular and genetic approaches will accelerate our knowledge of MdY3IP1 functions in PSI complex formation and plants stress resistance, and inform strategies for creating transgenic crop varieties with early maturity and high-resistant to adverse environmental conditions.
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Affiliation(s)
- Jian-Qiang Yu
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
| | - Jia-Hui Wang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
| | - Cui-Hui Sun
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
| | - Quan-Yan Zhang
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
| | - Da-Gang Hu
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
| | - Yu-Jin Hao
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
- National Key Laboratory of Crop Biology, MOA Key Laboratory of Horticultural Crop Biology and Germplasm Innovation, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An, Shandong 271018 China
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Zhang W, Wang J, Xu L, Wang A, Huang L, Du H, Qiu L, Oelmüller R. Drought stress responses in maize are diminished by Piriformospora indica. PLANT SIGNALING & BEHAVIOR 2018; 13:e1414121. [PMID: 29219729 PMCID: PMC5790412 DOI: 10.1080/15592324.2017.1414121] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 11/27/2017] [Accepted: 12/04/2017] [Indexed: 05/21/2023]
Abstract
As an endophytic fungus of Sebacinales, Piriformospora indica promotes plant growth and resistance to abiotic stress, including drought. Colonization of maize roots promoted the leaf size, root length and number of tap roots. Under drought stress, the maize seedlings profited from the presence of the fungus and performed visibly better than the uncolonized controls. To identify genes and biological processes involved in growth promotion and drought tolerance conferred by P. indica, the root transcriptome of colonized and uncolonized seedlings was analyzed 0, 6 and 12 h after drought stress (20% polyethylene glycol 6000). The number of P. indica-responsive genes increased from 464 (no stress at 0 h) to 1337 (6 h drought) and 2037 (12 h drought). Gene Ontology analyses showed that the carbon and sulfur metabolisms are major targets of the fungus. Furthermore, the growth promoting effect of P. indica is reflected by higher transcript levels for microtubule associated processes. Under drought stress, the fungus improved the oxidative potential of the roots, and stimulated genes for hormone functions, including those which respond to abscisic acid, auxin, salicylic acid and cytokinins. The comparative analyses of our study provides systematic insight into the molecular mechanism how P. indica promotes plant performance under drought stress, and presents a collection of genes which are specifically targeted by the fungus under drought stress in maize roots.
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MESH Headings
- Adaptation, Physiological/drug effects
- Adaptation, Physiological/genetics
- Basidiomycota/drug effects
- Basidiomycota/growth & development
- Basidiomycota/physiology
- Colony Count, Microbial
- Droughts
- Gene Expression Profiling
- Gene Expression Regulation, Plant/drug effects
- Gene Ontology
- Genes, Plant
- Plant Growth Regulators/pharmacology
- Plant Roots/drug effects
- Plant Roots/genetics
- Plant Roots/microbiology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Seedlings/drug effects
- Seedlings/growth & development
- Sequence Analysis, RNA
- Stress, Physiological/drug effects
- Stress, Physiological/genetics
- Zea mays/anatomy & histology
- Zea mays/drug effects
- Zea mays/microbiology
- Zea mays/physiology
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Affiliation(s)
- Wenying Zhang
- Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, Hubei, China
- CONTACT Wenying Zhang Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou 434025, Hubei, China
| | - Jun Wang
- Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, Hubei, China
| | - Le Xu
- Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, Hubei, China
| | - Aiai Wang
- Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, Hubei, China
| | - Lan Huang
- Department of Computer Science, Yangtze University, Jingzhou, Hubei, China
| | - Hewei Du
- Hubei Collaborative Innovation Center for Grain Industry/ Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, Hubei, China
| | - Lijuan Qiu
- Key Laboratory of Crop Germplasm Utilization, Ministry of Agriculture/Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ralf Oelmüller
- Friedrich Schiller University Jena, Institute of General Botany and Plant Physiology, Jena, Freistaat Thüringen, Germany
- Ralf Oelmüller Friedrich Schiller University Jena, Institute of General Botany and Plant Physiology, Jena Am Planetarium 1 D-07743, Freistaat Thüringen, Germany
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390
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Hou S, Zhu G, Li Y, Li W, Fu J, Niu E, Li L, Zhang D, Guo W. Genome-Wide Association Studies Reveal Genetic Variation and Candidate Genes of Drought Stress Related Traits in Cotton ( Gossypium hirsutum L.). FRONTIERS IN PLANT SCIENCE 2018; 9:1276. [PMID: 30233620 PMCID: PMC6129771 DOI: 10.3389/fpls.2018.01276] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/14/2018] [Indexed: 05/18/2023]
Abstract
Cotton is an important industrial crop worldwide and upland cotton (Gossypium hirsutum L.) is most widely cultivated in the world. Due to ever-increasing water deficit, drought stress brings a major threat to cotton production. Thus, it is important to reveal the genetic basis under drought stress and develop drought tolerant cotton cultivars. To address this issue, in present study, 319 upland cotton accessions were genotyped by 55,060 single nucleotide polymorphisms (SNPs) from high-density CottonSNP80K array and phenotyped nine drought tolerance related traits. The two datasets were used to identify quantitative trait nucleotides (QTNs) for the above nine traits using multi-locus random-SNP-effect mixed linear model method. As a result, a total of 20 QTNs distributed on 16 chromosomes were found to be significantly associated with six drought tolerance related traits. Of the 1,326 genes around the 20 QTNs, 205 were induced after drought stress treatment, and 46 were further mapped to Gene ontology (GO) term "response to stress." Taken genome-wide association study (GWAS) analysis, RNA-seq data and qRT-PCR verification, four genes, RD2 encoding a response to desiccation 2 protein, HAT22 encoding a homeobox-leucine zipper protein, PIP2 encoding a plasma membrane intrinsic protein 2, and PP2C encoding a protein phosphatase 2C, were proposed to be potentially important for drought tolerance in cotton. These results will deepen our understanding of the genetic basis of drought stress tolerance in cotton and provide candidate markers to accelerate the development of drought-tolerant cotton cultivars.
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391
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Fan Y, Yu M, Liu M, Zhang R, Sun W, Qian M, Duan H, Chang W, Ma J, Qu C, Zhang K, Lei B, Lu K. Genome-Wide Identification, Evolutionary and Expression Analyses of the GALACTINOL SYNTHASE Gene Family in Rapeseed and Tobacco. Int J Mol Sci 2017; 18:E2768. [PMID: 29261107 PMCID: PMC5751367 DOI: 10.3390/ijms18122768] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/16/2017] [Accepted: 12/17/2017] [Indexed: 11/16/2022] Open
Abstract
Galactinol synthase (GolS) is a key enzyme in raffinose family oligosaccharide (RFO) biosynthesis. The finding that GolS accumulates in plants exposed to abiotic stresses indicates RFOs function in environmental adaptation. However, the evolutionary relationships and biological functions of GolS family in rapeseed (Brassica napus) and tobacco (Nicotiana tabacum) remain unclear. In this study, we identified 20 BnGolS and 9 NtGolS genes. Subcellular localization predictions showed that most of the proteins are localized to the cytoplasm. Phylogenetic analysis identified a lost event of an ancient GolS copy in the Solanaceae and an ancient duplication event leading to evolution of GolS4/7 in the Brassicaceae. The three-dimensional structures of two GolS proteins were conserved, with an important DxD motif for binding to UDP-galactose (uridine diphosphate-galactose) and inositol. Expression profile analysis indicated that BnGolS and NtGolS genes were expressed in most tissues and highly expressed in one or two specific tissues. Hormone treatments strongly induced the expression of most BnGolS genes and homologous genes in the same subfamilies exhibited divergent-induced expression. Our study provides a comprehensive evolutionary analysis of GolS genes among the Brassicaceae and Solanaceae as well as an insight into the biological function of GolS genes in hormone response in plants.
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Affiliation(s)
- Yonghai Fan
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Mengna Yu
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Miao Liu
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Rui Zhang
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Wei Sun
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Mingchao Qian
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Huichun Duan
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Wei Chang
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Jinqi Ma
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Cunmin Qu
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Kai Zhang
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
| | - Bo Lei
- Key Laboratory of Molecular Genetics, China National Tobacco Corporation, Guizhou Academy of Tobacco Science, Guiyang 550081, China.
- Upland Flue-Cured Tobacco Quality and Ecology Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China.
| | - Kun Lu
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
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392
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Naylor D, DeGraaf S, Purdom E, Coleman-Derr D. Drought and host selection influence bacterial community dynamics in the grass root microbiome. THE ISME JOURNAL 2017; 11:2691-2704. [PMID: 28753209 PMCID: PMC5702725 DOI: 10.1038/ismej.2017.118] [Citation(s) in RCA: 256] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/20/2017] [Accepted: 06/07/2017] [Indexed: 12/30/2022]
Abstract
Root endophytes have been shown to have important roles in determining host fitness under periods of drought stress, and yet the effect of drought on the broader root endosphere bacterial community remains largely uncharacterized. In this study, we present phylogenetic profiles of bacterial communities associated with drought-treated root and rhizosphere tissues of 18 species of plants with varying degrees of drought tolerance belonging to the Poaceae family, including important crop plants. Through 16S rRNA gene profiling across two distinct watering regimes and two developmental time points, we demonstrate that there is a strong correlation between host phylogenetic distance and the microbiome dissimilarity within root tissues, and that drought weakens this correlation by inducing conserved shifts in bacterial community composition. We identify a significant enrichment in a wide variety of Actinobacteria during drought within the roots of all hosts, and demonstrate that this enrichment is higher within the root than it is in the surrounding environments. Furthermore, we show that this observed enrichment is the result of an absolute increase in Actinobacterial abundance and that previously hypothesized mechanisms for observed enrichments in Actinobacteria in drought-treated soils are unlikely to fully account for the phenomena observed here within the plant root.
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Affiliation(s)
- Dan Naylor
- Department of Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, CA, USA
- Plant Gene Expression Center, UC Berkeley, USDA-ARS, Albany, CA, USA
| | - Stephanie DeGraaf
- Department of Statistics, University of California, Berkeley, CA, USA
| | - Elizabeth Purdom
- Department of Statistics, University of California, Berkeley, CA, USA
| | - Devin Coleman-Derr
- Department of Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, CA, USA
- Plant Gene Expression Center, UC Berkeley, USDA-ARS, Albany, CA, USA
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393
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Tiwari S, Lata C, Chauhan PS, Prasad V, Prasad M. A Functional Genomic Perspective on Drought Signalling and its Crosstalk with Phytohormone-mediated Signalling Pathways in Plants. Curr Genomics 2017; 18:469-482. [PMID: 29204077 PMCID: PMC5684651 DOI: 10.2174/1389202918666170605083319] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 10/03/2016] [Accepted: 10/15/2016] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Drought stress is one of the most important abiotic stresses that negatively influence crop performance and productivity. Plants acclimatize to drought stress conditions through altered molecular, biochemical and physiological responses. Gene and/or protein expression and regulation are thought to be modulated upon stress perception and signal transduction for providing requisite endurance to plants.Plant growth regulators or phytohormones are important molecules required for various biological processes in plants and are also central to stress signalling pathways. Among various phytohormones, Abscisic Acid (ABA) and Ethylene (ET) are considered to be the most vital growth regulators implicated in drought stress signalling and tolerance. Besides the above two known classical phytohormones, Salicylic Acid (SA) and Jasmonic Acid (JA) have also been found to potentially enhance abiotic stress tolerance particularly that of drought, salinity, and heat stress tolerance in plants. Apart from these several other growth regulators such as Cytokinins (CKs), Auxin (AUX), Gibberellic Acid (GA), Brassinosteroids (BRs) and Strigolactones (SLs) have also been reported to actively participate in abiotic stress responses and tolerance in plants. The abiotic stress signalling in plants regulated by these hormones further depends upon the nature, intensity, and duration of exposure to various environmental stresses. It has been reported that all these phytohormones are also involved in extensive crosstalk and signal transduction among themselves and/or with other factors. CONCLUSION This review thus summarizes the molecular mechanism of drought signalling and its crosstalk with various phytohormone signalling pathways implicated in abiotic stress response and tolerance.
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Affiliation(s)
- Shalini Tiwari
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, India
- Department of Botany, University of Lucknow, Lucknow-226007, India
| | - Charu Lata
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, India
| | - Puneet Singh Chauhan
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, India
| | - Vivek Prasad
- Department of Botany, University of Lucknow, Lucknow-226007, India
| | - Manoj Prasad
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi-110067, India
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394
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395
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Aguilar E, Cutrona C, Del Toro FJ, Vallarino JG, Osorio S, Pérez-Bueno ML, Barón M, Chung BN, Canto T, Tenllado F. Virulence determines beneficial trade-offs in the response of virus-infected plants to drought via induction of salicylic acid. PLANT, CELL & ENVIRONMENT 2017; 40:2909-2930. [PMID: 28718885 DOI: 10.1111/pce.13028] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 06/28/2017] [Accepted: 07/02/2017] [Indexed: 05/21/2023]
Abstract
It has been hypothesized that plants can get beneficial trade-offs from viral infections when grown under drought conditions. However, experimental support for a positive correlation between virus-induced drought tolerance and increased host fitness is scarce. We investigated whether increased virulence exhibited by the synergistic interaction involving Potato virus X (PVX) and Plum pox virus (PPV) improves tolerance to drought and host fitness in Nicotiana benthamiana and Arabidopsis thaliana. Infection by the pair PPV/PVX and by PPV expressing the virulence protein P25 of PVX conferred an enhanced drought-tolerant phenotype compared with single infections with either PPV or PVX. Decreased transpiration rates in virus-infected plants were correlated with drought tolerance in N. benthamiana but not in Arabidopsis. Metabolite and hormonal profiles of Arabidopsis plants infected with the different viruses showed a range of changes that positively correlated with a greater impact on drought tolerance. Virus infection enhanced drought tolerance in both species by increasing salicylic acid accumulation in an abscisic acid-independent manner. Viable offspring derived from Arabidopsis plants infected with PPV increased relative to non-infected plants, when exposed to drought. By contrast, the detrimental effect caused by the more virulent viruses overcame potential benefits associated with increased drought tolerance on host fitness.
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Affiliation(s)
- Emmanuel Aguilar
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, 28040, Spain
| | - Carmen Cutrona
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, 28040, Spain
| | - Francisco J Del Toro
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, 28040, Spain
| | - José G Vallarino
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea, Universidad de Málaga-CSIC, Málaga, 2907, Spain
| | - Sonia Osorio
- Departamento de Biología Molecular y Bioquímica, Instituto de Hortofruticultura Subtropical y Mediterránea, Universidad de Málaga-CSIC, Málaga, 2907, Spain
| | - María Luisa Pérez-Bueno
- Departamento de Bioquímica, Biología Celular y Molecular de Plantas, Estación Experimental del Zaidín, CSIC, Granada, 18008, Spain
| | - Matilde Barón
- Departamento de Bioquímica, Biología Celular y Molecular de Plantas, Estación Experimental del Zaidín, CSIC, Granada, 18008, Spain
| | - Bong-Nam Chung
- National Institute of Horticultural and Herbal Science, Rural Development Administration, Wanju, 55365, Republic of Korea
| | - Tomás Canto
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, 28040, Spain
| | - Francisco Tenllado
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, Madrid, 28040, Spain
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396
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Shavrukov Y, Kurishbayev A, Jatayev S, Shvidchenko V, Zotova L, Koekemoer F, de Groot S, Soole K, Langridge P. Early Flowering as a Drought Escape Mechanism in Plants: How Can It Aid Wheat Production? FRONTIERS IN PLANT SCIENCE 2017; 8:1950. [PMID: 29204147 PMCID: PMC5698779 DOI: 10.3389/fpls.2017.01950] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 10/30/2017] [Indexed: 05/18/2023]
Abstract
Drought escape (DE) is a classical adaptive mechanism which involves rapid plant development to enable the completion of the full life-cycle prior to a coming drought event. This strategy is widely used in populations of native plants, and is also applicable to cereal crops such as wheat. Early flowering time and a shorter vegetative phase can be very important for wheat production in conditions of terminal drought since this can minimize exposure to dehydration during the sensitive flowering and post-anthesis grain filling periods. A gradual shift toward early flowering has been observed over the last century of wheat breeding in countries with a Mediterranean-type climate and frequent terminal drought. This trend is predicted to continue for wheat production in the coming years in response to global climate warming. The advantage of early flowering wheat is apparent under conditions of impending terminal drought, and modern varieties are significantly more productive due to minimization of the risk associated with drought stress. Under favorable conditions, a short vegetative phase can result in reduced plant biomass due to the reduction in time available for photosynthetic production and seed nutrient accumulation. However, high yield potential has been reported for the development of both shallow and deep roots, representing plasticity in response to drought in combination with the early flowering trait. Wheat productivity can be high both in well-watered and drought-affected field trials, where an efficient strategy of DE was associated with quick growth, yield potential and water use efficiency. Therefore, early flowering provides a promising strategy for the production of advanced drought-adapted wheat cultivars.
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Affiliation(s)
- Yuri Shavrukov
- School of Biological Sciences, Flinders University, Bedford Park, SA, Australia
- School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA, Australia
| | - Akhylbek Kurishbayev
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Astana, Kazakhstan
| | - Satyvaldy Jatayev
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Astana, Kazakhstan
| | - Vladimir Shvidchenko
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Astana, Kazakhstan
| | - Lyudmila Zotova
- Faculty of Agronomy, S. Seifullin Kazakh AgroTechnical University, Astana, Kazakhstan
| | | | | | - Kathleen Soole
- School of Biological Sciences, Flinders University, Bedford Park, SA, Australia
| | - Peter Langridge
- School of Agriculture, Food and Wine, University of Adelaide, Urrbrae, SA, Australia
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397
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Griffiths CA, Paul MJ. Targeting carbon for crop yield and drought resilience. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:4663-4671. [PMID: 28653336 PMCID: PMC5655914 DOI: 10.1002/jsfa.8501] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/12/2017] [Accepted: 06/18/2017] [Indexed: 05/21/2023]
Abstract
Current methods of crop improvement are not keeping pace with projected increases in population growth. Breeding, focused around key traits of stem height and disease resistance, delivered the step-change yield improvements of the green revolution of the 1960s. However, subsequently, yield increases through conventional breeding have been below the projected requirement of 2.4% per year required by 2050. Genetic modification (GM) mainly for herbicide tolerance and insect resistance has been transformational, akin to a second green revolution, although GM has yet to make major inroads into intrinsic yield processes themselves. Drought imposes the major restriction on crop yields globally but, as yet, has not benefited substantially from genetic improvement and still presents a major challenge to agriculture. Much still has to be learnt about the complex process of how drought limits yield and what should be targeted. Mechanisms of drought adaptation from the natural environment cannot be taken into crops without significant modification for the agricultural environment because mechanisms of drought tolerance are often in contrast with mechanisms of high productivity required in agriculture. However, through convergence of fundamental and translational science, it would appear that a mechanism of sucrose allocation in crops can be modified for both productivity and resilience to drought and other stresses. Recent publications show how this mechanism can be targeted by GM, natural variation and a new chemical approach. Here, with an emphasis on drought, we highlight how understanding fundamental science about how crops grow, develop and what limits their growth and yield can be combined with targeted genetic selection and pioneering chemical intervention technology for transformational yield improvements. © 2017 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Cara A Griffiths
- Plant Science, Rothamsted ResearchHarpendenHertfordshireAL5 2JQUK
| | - Matthew J Paul
- Plant Science, Rothamsted ResearchHarpendenHertfordshireAL5 2JQUK
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398
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Neves DM, Almeida LADH, Santana-Vieira DDS, Freschi L, Ferreira CF, Soares Filho WDS, Costa MGC, Micheli F, Coelho Filho MA, Gesteira ADS. Recurrent water deficit causes epigenetic and hormonal changes in citrus plants. Sci Rep 2017; 7:13684. [PMID: 29057930 PMCID: PMC5651809 DOI: 10.1038/s41598-017-14161-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 10/06/2017] [Indexed: 11/09/2022] Open
Abstract
The present study evaluated the physiological, molecular and hormonal parameters from scion/rootstock interaction of citrus plants during recurrent water deficit. Responses of the Valencia (VO) scion variety grafted on two rootstocks with different soil water extraction capacities, Rangpur Lime (RL) and Sunki Maravilha (SM), during three successive periods of water deficit: plants exposed to a single episode of water deficit (WD1) and plants exposed to two (WD2) and three (WD3) recurrent periods of WD were compared. The combinations VO/RL and VO/SM presented polymorphic alterations of epigenetic marks and hormonal (i.e. abscisic acid, auxins and salicylicacid) profiles, which were particularly prominent when VO/SM plantswere exposed toWD3 treatment. Upon successive drought events, the VO/SM combination presented acclimatization characteristics that enable higher tolerance to water deficit by increasing transpiration (E), stomatal conductance (g s ) and photosynthetic rate (A), which in turn may have facilitated the whole plant survival. Besides providing comprehensive data on the scion/rootstock interactions upon successive stress events, this study brings the first dataset suggesting that epigenetic alterations in citrus plants triggered by recurrent water deficit lead to improved drought tolerance in this crop species.
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Affiliation(s)
- Diana Matos Neves
- Departamento de Biologia, Centro de Genética e Biologia Molecular, Universidade Estadual de Santa Cruz, Ilhéus-Bahia, 45662-900, Brazil
| | | | - Dayse Drielly Souza Santana-Vieira
- Departamento de Ciências Exatas e Tecnológicas, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista-Bahia, 45083-900, Brazil.,Departamento de Ciências Agrárias, Universidade Federal do Recôncavo da Bahia, Cruz das Almas-Bahia, 44380-000, Brazil
| | - Luciano Freschi
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, 05508-090, Brazil
| | | | | | - Marcio Gilberto Cardoso Costa
- Departamento de Biologia, Centro de Genética e Biologia Molecular, Universidade Estadual de Santa Cruz, Ilhéus-Bahia, 45662-900, Brazil
| | - Fabienne Micheli
- Departamento de Biologia, Centro de Genética e Biologia Molecular, Universidade Estadual de Santa Cruz, Ilhéus-Bahia, 45662-900, Brazil.,CIRAD -UMR AGAP, F-34398, Montpellier, France
| | | | - Abelmon da Silva Gesteira
- Departamento de Biologia, Centro de Genética e Biologia Molecular, Universidade Estadual de Santa Cruz, Ilhéus-Bahia, 45662-900, Brazil. .,Embrapa-Mandioca e Fruticultura, Cruz das Almas-Bahia, 44380-000, Brazil.
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399
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Cagirici HB, Alptekin B, Budak H. RNA Sequencing and Co-expressed Long Non-coding RNA in Modern and Wild Wheats. Sci Rep 2017; 7:10670. [PMID: 28878329 PMCID: PMC5587677 DOI: 10.1038/s41598-017-11170-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 08/21/2017] [Indexed: 12/01/2022] Open
Abstract
There is an urgent need for the improvement of drought-tolerant bread and durum wheat. The huge and complex genome of bread wheat (BBAADD genome) stands as a vital obstruction for understanding the molecular mechanism underlying drought tolerance. However, tetraploid wheat (Triticum turgidum ssp., BBAA genome) is an ancestor of modern bread wheat and offers an important model for studying the drought response due to its less complex genome. Additionally, several wild relatives of tetraploid wheat have already shown a significant drought tolerance. We sequenced root transcriptome of three tetraploid wheat varieties with varying stress tolerance profiles, and built differential expression library of their transcripts under control and drought conditions. More than 5,000 differentially expressed transcripts were identified from each genotype. Functional characterization of transcripts specific to drought-tolerant genotype, revealed their association with osmolytes production and secondary metabolite pathways. Comparative analysis of differentially expressed genes and their non-coding RNA partners, long noncoding RNAs and microRNAs, provided valuable insight to gene expression regulation in response to drought stress. LncRNAs as well as coding transcripts share similar structural features in different tetraploid species; yet, lncRNAs slightly differ from coding transcripts. Several miRNA-lncRNA target pairs were detected as differentially expressed in drought stress. Overall, this study suggested an important pool of transcripts where their manipulations confer a better performance of wheat varieties under drought stress.
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Affiliation(s)
- Halise Busra Cagirici
- Sabanci University, Molecular Biology, Genetics and Bioengineering Program, Istanbul, Turkey
| | - Burcu Alptekin
- Cereal Genomics Lab, Montana State University, Department of Plant Sciences and Plant Pathology, Bozeman, MT, USA
| | - Hikmet Budak
- Sabanci University, Molecular Biology, Genetics and Bioengineering Program, Istanbul, Turkey.
- Cereal Genomics Lab, Montana State University, Department of Plant Sciences and Plant Pathology, Bozeman, MT, USA.
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400
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El-Hendawy S, Al-Suhaibani N, Hassan W, Tahir M, Schmidhalter U. Hyperspectral reflectance sensing to assess the growth and photosynthetic properties of wheat cultivars exposed to different irrigation rates in an irrigated arid region. PLoS One 2017; 12:e0183262. [PMID: 28829809 PMCID: PMC5567659 DOI: 10.1371/journal.pone.0183262] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 08/01/2017] [Indexed: 11/18/2022] Open
Abstract
Simultaneous indirect assessment of multiple and diverse plant parameters in an exact and expeditious manner is becoming imperative in irrigated arid regions, with a view toward creating drought-tolerant genotypes or for the management of precision irrigation. This study aimed to evaluate whether spectral reflectance indices (SRIs) in three parts of the electromagnetic spectrum ((visible-infrared (VIS), near-infrared (NIR)), and shortwave-infrared (SWIR)) could be used to track changes in morphophysiological parameters of wheat cultivars exposed to 1.00, 0.75, and 0.50 of the estimated evapotranspiration (ETc). Significant differences were found in the parameters of growth and photosynthetic efficiency, and canopy spectral reflectance among the three cultivars subjected to different irrigation rates. All parameters were highly and significantly correlated with each other particularly under the 0.50 ETc treatment. The VIS/VIS- and NIR/VIS-based indices were sufficient and suitable for assessing the growth and photosynthetic properties of wheat cultivars similar to those indices based on NIR/NIR, SWIR/NIR, or SWIR/SWIR. Almost all tested SRIs proved to assess growth and photosynthetic parameters, including transpiration rate, more efficiently when regressions were analyzed for each water irrigation rate individually. This study, the type of which has rarely been conducted in irrigated arid regions, indicates that spectral reflectance data can be used as a rapid and non-destructive alternative method for assessment of the growth and photosynthetic efficiency of wheat under a range of water irrigation rates.
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Affiliation(s)
- Salah El-Hendawy
- Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
- Department of Agronomy, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt
| | - Nasser Al-Suhaibani
- Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Wael Hassan
- Department of Agricultural Botany, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt
- Department of Biology, Quwayiyah College of Science and Humanities, Shaqra University, Shaqra, Saudi Arabia
| | - Mohammad Tahir
- Department of Plant Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Urs Schmidhalter
- Chair of Plant Nutrition, Department of Plant Sciences, Technical University of Munich, Freising-Weihenstephan, Germany
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