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Koc YE, Aycan M, Mitsui T. Exogenous proline suppresses endogenous proline and proline-production genes but improves the salinity tolerance capacity of salt-sensitive rice by stimulating antioxidant mechanisms and photosynthesis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108914. [PMID: 38981207 DOI: 10.1016/j.plaphy.2024.108914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 05/28/2024] [Accepted: 07/03/2024] [Indexed: 07/11/2024]
Abstract
Salinity is a critical environmental stress factor that significantly reduces crop productivity and yield. A mutant B-type response regulator gene (hst1) has been shown to promote salinity tolerance in the YNU genotype. Previous studies on the hst1 gene showed a higher proline production capacity under salt stress. Using almost identical genetic backgrounded salt-tolerant (YNU) and salt-sensitive (Sister line) rice genotypes, we tested the function of proline in the hst1 gene salinity-tolerance mechanism by applying exogenous proline under control and salt-stress conditions. Morpho-physiological, biochemical, and molecular analysis of ST and SS plants was performed to clarify the salinity tolerance mechanism mediated by the exogenous proline. The ST and SS genotypes accumulated exogenous proline, and the ST genotype has higher proline levels than the SS genotype. However, exogenous proline improved salt tolerance only in the SS genotype. Exogenous proline promotes plant and root growth by stimulating photosynthetic pigments and photosynthesis. The exogenous proline has a reductive effect on MDA, and H2O2 protects plants against ROS. Interestingly, exogenous proline lowers Na+ and raises K+ accumulations under salt stress. In the SS genotype, exogenous proline increases the activity of antioxidant enzymes (SOD, CAT, and APX) to protect against salinity-induced damage. The exogenous proline application down-regulates proline-synthesis genes (OsP5CS1 and OsP5CR) and up-regulates proline-degradation genes. Also, exogenous proline increases the expression of the OsSalT and OsGRAS29 genes, improving salinity tolerance in the SS genotype. Our study has demonstrated that proline plays a significant role in conferring salt tolerance with the salinity-tolerance-related hst1 mechanisms.
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Affiliation(s)
- Yunus Emre Koc
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata, 950-21-81, Japan; General Directorate of Agricultural Research and Policies, Ministry of Agriculture and Forestry, Ankara, 06800, Turkiye
| | - Murat Aycan
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan.
| | - Toshiaki Mitsui
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata, 950-21-81, Japan; Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan.
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Ehtaiwesh A, Sunoj VSJ, Djanaguiraman M, Prasad PVV. Response of winter wheat genotypes to salinity stress under controlled environments. FRONTIERS IN PLANT SCIENCE 2024; 15:1396498. [PMID: 38978515 PMCID: PMC11228282 DOI: 10.3389/fpls.2024.1396498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 05/30/2024] [Indexed: 07/10/2024]
Abstract
This study was conducted in controlled environmental conditions to systematically evaluate multi-traits responses of winter wheat (Triticum aestivum L.) genotypes to different salinity levels. Responses were assessed at the germination to early seedling stage (Experiment 1). Seeds of different genotypes (n=292) were subjected to three salinity levels (0 [control], 60, and 120 mM NaCl). Principal Component Analysis (PCA) revealed that among studied traits seedling vigor index (SVI) contributed more towards the diverse response of genotypes to salinity stress. Based on SVI, eight contrasting genotypes assumed to be tolerant (Gage, Guymon, MTS0531, and Tascosa) and susceptible (CO04W320, Carson, TX04M410211) were selected for further physio-biochemical evaluation at the booting stage (Experiment 2) and to monitor grain yield. Higher level of salinity (120 mM NaCl) exposure at the booting stage increased thylakoid membrane damage, lipid peroxidation, sugars, proline, and protein while decreasing photosynthesis, chlorophyll index, starch, and grain yield. Based on grain yield, the assumed magnitude of the genotypic response shown in Experiment 1 was not analogous in Experiment 2. This indicates the necessity of individual screening of genotypes at different sensitive growth stages for identifying true salinity-tolerant and susceptible genotypes at a particular growth stage. However, based on higher grain yield and its least percentage reduction under higher salinity, Guymon and TX04M410211 were identified as tolerant, and Gage and CO04W320 as susceptible at the booting stage, and their biparental population can be used to identify genomic regions for booting stage-specific salinity response.
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Affiliation(s)
- Amal Ehtaiwesh
- Department of Agronomy, Crop Physiology Lab, 2004 Throckmorton Plant Science Center, Kansas State University, Manhattan, KS, United States
| | - V. S. John Sunoj
- Department of Agronomy, Crop Physiology Lab, 2004 Throckmorton Plant Science Center, Kansas State University, Manhattan, KS, United States
- Crop Eco-physiology, Texas A&M AgriLife Research and Extension Center, Uvalde, TX, United States
| | - Maduraimuthu Djanaguiraman
- Department of Agronomy, Crop Physiology Lab, 2004 Throckmorton Plant Science Center, Kansas State University, Manhattan, KS, United States
- Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, India
| | - P. V. Vara Prasad
- Department of Agronomy, Crop Physiology Lab, 2004 Throckmorton Plant Science Center, Kansas State University, Manhattan, KS, United States
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Alghabari F, Shah ZH. Comparative adaptability assessment of bread wheat and synthetic hexaploid genotypes under saline conditions using physiological, biochemical, and genetic indices. FRONTIERS IN PLANT SCIENCE 2024; 15:1336571. [PMID: 38916034 PMCID: PMC11194433 DOI: 10.3389/fpls.2024.1336571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 05/22/2024] [Indexed: 06/26/2024]
Abstract
The tolerance to salinity stress is an intricate phenomenon at cellular and whole plant level that requires the knowledge of contributing physiological and biochemical processes and the genetic control of participating traits. In this context, present study was conducted with objective to evaluate the physiological, biochemical, and genetic responses of different wheat genotypes including bread wheat (BW) and synthetic hexaploids (SHs) under saline and control environment. The experiment was conducted in two factorial arrangement in randomized complete block design (RCBD), with genotypes as one factor and treatments as another factor. A significant decline in physiological traits (chlorophyll, photosynthesis, stomatal conductance, transpiration, and cell membrane stability) was observed in all genotypes due to salt stress; however, this decline was higher in BW genotypes as compared to four SH genotypes. In addition, the biochemical traits including enzymes [superoxide dismutase, catalase, and peroxidase (POD)] activity, proline, and glycine betaine (GB) illustrated significant increase along with increase in the expression of corresponding genes (TaCAT1, TaSOD, TaPRX2A, TaP5CS, and TaBADH-A1) due to salt stress in SHs as compared to BW. Correspondingly, highly overexpressed genes, TaHKT1;4, TaNHX1, and TaAKT1 caused a significant decline in Na+/K+ in SH as compared to BW genotypes under salt stress. Moreover, correlation analysis, principal component analysis (PCA), and heatmap analysis have further confirmed that the association and expression of physiological and biochemical traits varied significantly with salinity stress and type of genotype. Overall, the physiological, biochemical, and genetic evaluation proved SHs as the most useful stock for transferring salinity tolerance to other superior BW cultivars via the right breeding program.
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Affiliation(s)
- Fahad Alghabari
- Department of Arid Land Agriculture, King Abdulaziz University, Jaddah, Saudi Arabia
| | - Zahid Hussain Shah
- Department of Plant Breeding and Genetics, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Pakistan
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Han X, Yang R, Zhang L, Wei Q, Zhang Y, Wang Y, Shi Y. A Review of Potato Salt Tolerance. Int J Mol Sci 2023; 24:10726. [PMID: 37445900 DOI: 10.3390/ijms241310726] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/16/2023] [Accepted: 06/24/2023] [Indexed: 07/15/2023] Open
Abstract
Potato is the world's fourth largest food crop. Due to limited arable land and an ever-increasing demand for food from a growing population, it is critical to increase crop yields on existing acreage. Soil salinization is an increasing problem that dramatically impacts crop yields and restricts the growing area of potato. One possible solution to this problem is the development of salt-tolerant transgenic potato cultivars. In this work, we review the current potato planting distribution and the ways in which it overlaps with salinized land, in addition to covering the development and utilization of potato salt-tolerant cultivars. We also provide an overview of the current progress toward identifying potato salt tolerance genes and how they may be deployed to overcome the current challenges facing potato growers.
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Affiliation(s)
- Xue Han
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Ruijie Yang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Lili Zhang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Qiaorong Wei
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Yu Zhang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Yazhi Wang
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
| | - Ying Shi
- College of Agriculture, Northeast Agricultural University, Harbin 150030, China
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Wang Y, Ma W, Fu H, Li L, Ruan X, Zhang X. Effects of Salinity Stress on Growth and Physiological Parameters and Related Gene Expression in Different Ecotypes of Sesuvium portulacastrum on Hainan Island. Genes (Basel) 2023; 14:1336. [PMID: 37510241 PMCID: PMC10380013 DOI: 10.3390/genes14071336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/17/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
We conducted a study to examine the growth and physiological changes in 12 different ecotypes of Sesuvium portulacastrum collected from Hainan Island in China. These ecotypes were subjected to different concentrations (0, 200, 400, and 600 mmol/L) of sodium chloride (NaCl) salt stress for 14 days. We also analyzed the expression of metabolic genes related to stress response. Under low salt stress, indicators such as plant height in region K (0 mmol/L: 45% and highest at 200 mmol/L: 80%), internode length (0 mmol/L: 0.38, 200 mmol/L: 0.87, 400 mmol/L: 0.25, and 600 mmol/L: 1.35), as well as leaf area, relative water content, fresh weight, and dry weight exhibited an overall increasing trend with the increase in salt concentration. However, as the salt concentration increased, these indicators showed a decreasing trend. Proline and malondialdehyde contents increased with higher salt concentrations. When the NaCl concentration was 400 mmol/L, MDA content in the leaves was highest in the regions E (196.23%), F (94.28%), J (170.10%), and K (136.08%) as compared to the control group, respectively. Most materials demonstrated a significant decrease in chlorophyll a, chlorophyll b, and total chlorophyll content compared to the control group. Furthermore, the ratio of chlorophyll a to chlorophyll b (Rab) varied among different materials. Using principal component analysis, we identified three ecotypes (L from Xinglong Village, Danzhou City; B from Shuigoupo Village, Lingshui County; and J from Haidongfang Park, Dongfang City) that represented high, medium, and low salt tolerance levels, respectively, based on the above growth and physiological indexes. To further investigate the expression changes of related genes at the transcriptional level, we employed qRT-PCR. The results showed that the relative expression of SpP5CS1, SpLOX1, and SpLOX1 genes increased with higher salt concentrations, which corresponded to the accumulation of proline and malondialdehyde content, respectively. However, the relative expression of SpCHL1a and SpCHL1b did not exhibit a consistent pattern. This study contributes to our understanding of the salt tolerance mechanism in the true halophyte S. portulacastrum, providing a solid theoretical foundation for further research in this field.
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Affiliation(s)
- Yong Wang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Wei Ma
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Haijiang Fu
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Liting Li
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Xueyu Ruan
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Xueyan Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
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Nahar L, Aycan M, Lopes Hornai EM, Baslam M, Mitsui T. Tolerance with High Yield Potential Is Provided by Lower Na + Ion Accumulation and Higher Photosynthetic Activity in Tolerant YNU31-2-4 Rice Genotype under Salinity and Multiple Heat and Salinity Stress. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091910. [PMID: 37176968 PMCID: PMC10180928 DOI: 10.3390/plants12091910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/18/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023]
Abstract
The yield-reduction effect of abiotic stressors such as salinity and heat stresses with the growing world population threatens food security. Although adverse effects of salinity and heat stress on plant growth and production parameters have been documented, in nature, abiotic stresses occur sequentially or simultaneously. In this study, the stress tolerance and yield capacity of Yukinkomai, YNU31-2-4, and YNU SL rice genotypes tested under control (26 °C, 0 mM NaCl), salinity (26 °C, 75 mM NaCl), heat (31 °C, 0 mM NaCl), and heat and salinity (31 °C, 75 mM NaCl) stress combinations at vegetative and reproductive stages with six different scenarios. The results show that salinity and the heat and salinity combination stresses highly reduce plant growth performance and yield capacity. Heat stress during reproduction does not affect the yield but reduces the grain quality. The YNU31-2-4 genotype performs better under heavy salt and heat and salinity stress then the Yukinkomai and YNU SL genotypes. YNU31-2-4 genotypes accumulate less Na+ and more K+ under salt and multiple stresses. In the YNU31-2-4 genotype, low Na+ ion accumulation increases photosynthetic activity and pigment deposition, boosting the yield. Stress lowers the glucose accumulation in dry seeds, but the YNU31-2-4 genotype has a higher glucose accumulation.
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Affiliation(s)
- Lutfun Nahar
- Department of Life and Food Science, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
- Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Murat Aycan
- JSPS International Research Fellow, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
| | - Ermelinda Maria Lopes Hornai
- Department of Life and Food Science, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
- National Division of Research and Statistics, Timor-Leste Ministry of Agriculture and Fisheries, Dili 626, Timor-Leste
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
- Centre d'Agrobiotechnologie et Bioinge' Nierie, Unite' deRecherche labellise' e CNRST (Centre AgroBio-tech-URL-CNRST-05), Universite' Cadi Ayyad, Marrakech 40000, Morocco
- Laboratory of Agro-Food, Biotechnologies, and Valorization of PlantBioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh 40000, Morocco
| | - Toshiaki Mitsui
- Department of Life and Food Science, Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan
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Aycan M, Nahar L, Baslam M, Mitsui T. B-type response regulator hst1 controls salinity tolerance in rice by regulating transcription factors and antioxidant mechanisms. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 196:542-555. [PMID: 36774910 DOI: 10.1016/j.plaphy.2023.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/19/2023] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
Salinity is a serious environmental problem that limits plant yield in almost half of the agricultural fields. The hitomebore salt tolerant 1(hst1) is a mutant B-type response regulator gene that was reported to improve salinity tolerance in the 'YNU31-2-4' (YNU) genotype. The sister line (SL) is salt-sensitive, and the nearest genomic relative of the YNU plant has the OsRR22 gene, which is the non-mutant form of the hst1 gene. Biochemical and comprehensive transcriptome analysis of SL and YNU plants was performed to clarify the salinity tolerance mechanism(s) mediated by the hst1 gene. The hst1 gene reduced Na+ ions, lipid peroxidation, and H2O2 content, and improve proline and antioxidant enzymes activities under salt stress. Various transporter and gene-specific transcriptional regulator genes up-regulated in presence of the hst1 gene under saline conditions, identifying that post-stress transcription factors (OsbHLH056, OsH43, OsGRAS29, and OsMADS1) contributed to improved salinity tolerance in YNU plants. Specifically, OsSalT, miR156, and OsLPT1.16 genes were up-regulated, while upstream (OsHKs and OsHPs) and downstream regulators of the OsRR22 gene were down-regulated in YNU plants under saline conditions. Notably, the transcription factors reprogramming, upstream and downstream genes, indicate that these pathways are transcriptionally regulated by the hst1 gene. The findings of the regulatory role of the hst1 gene on plant transcriptome provide a greater understanding of hst1-mediated salt tolerance in rice plants. This knowledge will contribute to understanding the salinity tolerance mechanisms in rice and the evolution of salt-tolerant crops with the ability to withstand higher salinity to ensure food security during climate change.
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Affiliation(s)
- Murat Aycan
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan.
| | - Lutfun Nahar
- Department of Life and Food Sciences, Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan; Department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan
| | - Toshiaki Mitsui
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, 950-2181, Japan.
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