Biological features and regulatory mechanisms of salt tolerance in plants

Li, Jingrui; Liu, Min

doi:10.1002/jcb.28474

Cited by 5 publications

(2 citation statements)

References 97 publications

(223 reference statements)

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“…Moreover, different combinations of Na + exclusion and tissue tolerance might contribute to similar levels of salt tolerance [ 23 ]. In addition, the higher relative K content in the tolerant genotypes helps to maintain a lower Na/K ratio and ion homeostasis under salt stress, thus conferring salt tolerance [ 11 , 14 , 46 , 48 ].…”

Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Wheat Germplasm for Salt Tolerance

Quan

Liang

et al. 2021

Plants

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Salinity is one of the limiting factors of wheat production worldwide. A total of 334 internationally derived wheat genotypes were employed to identify new germplasm resources for salt tolerance breeding. Salt stress caused 39, 49, 58, 55, 21 and 39% reductions in shoot dry weight (SDW), root dry weight (RDW), shoot fresh weight (SFW), root fresh weight (RFW), shoot height (SH) and root length (RL) of wheat, respectively, compared with the control condition at the seedling stage. The wheat genotypes showed a wide genetic and tissue diversity for the determined characteristics in response to salt stress. Finally, 12 wheat genotypes were identified as salt-tolerant through a combination of one-factor (more emphasis on the biomass yield) and multifactor analysis. In general, greater accumulation of osmotic substances, efficient use of soluble sugars, lower Na+/K+ and a higher-efficiency antioxidative system contribute to better growth in the tolerant genotypes under salt stress. In other words, the tolerant genotypes are capable of maintaining stable osmotic potential and ion and redox homeostasis and providing more energy and materials for root growth. The identified genotypes with higher salt tolerance could be useful for developing new salt-tolerant wheat cultivars as well as in further studies to underline the genetic mechanisms of salt tolerance in wheat.

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Section: Discussionmentioning

confidence: 99%

Identification and Characterization of Wheat Germplasm for Salt Tolerance

Quan

Liang

et al. 2021

Plants

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“…PGP bacteria not only increase production of exopolysaccharides, siderophores, alter pH, modify toxic metals and solubilize phosphorus but also help in evacuating stress-alleviating metabolite 1-aminocyclopropane-1-carboxylic acid deaminase. They also play an important role in the secretion of indole-3acetic acid (IAA), cytokinin and gibberellins and the development of antibiotic resistance [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of salt-tolerant bacteria with plant growth-promoting activities from saline agricultural fields of Haryana, India

Sharma

Dev

Sourirajan

et al. 2021

Journal of Genetic Engineering and Biotechnology

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Background Soil salinity has been one of the biggest hurdles in achieving better crop yield and quality. Plant growth-promoting rhizobacteria (PGPR) are the symbiotic heterogeneous bacteria that play an important role in the recycling of plant nutrients through phytostimulation and phytoremediation. In this study, bacterial isolates were isolated from salt-polluted soil of Jhajjar and Panipat districts of Haryana, India. The potential salt-tolerant bacteria were screened for their PGPR activities such as phosphate solubilization, hydrogen cyanide (HCN), indole acetic acid (IAA) and ammonia production. The molecular characterization of potent isolates with salt tolerance and PGPR activity was done by 16S rDNA sequencing. Results Eighteen soil samples from saline soils of Haryana state were screened for salt-tolerant bacteria. The bacterial isolates were analyzed for salt tolerance ranging from 2 to 10%. Thirteen isolates were found salt tolerant at varied salt concentrations. Isolates HB6P2 and HB6J2 showed maximum tolerance to salts at 10% followed by HB4A1, HB4N3 and HB8P1. All the salt-tolerant bacterial isolates showed HCN production with maximum production by HB6J2. Phosphate solubilization was demonstrated by three isolates viz., HB4N3, HB6P2 and HB6J2. IAA production was maximum in HB4A1 (15.89) and HB6P2 (14.01) and least in HB4N3 (8.91). Ammonia production was maximum in HB6P2 (12.3) and least in HB8P1 (6.2). Three isolates HB6J2, HB8P1 and HB4N3 with significant salt tolerance, and PGPR ability were identified through sequencing of amplified 16SrRNA gene and were found to be Bacillus paramycoides, Bacillus amyloliquefaciens and Bacillus pumilus, respectively. Conclusions The salt-tolerant plant growth-promoting rhizobacteria (PGPR) isolated from saline soil can be used to overcome the detrimental effects of salt stress on plants, with beneficial effects of physiological functions of plants such as growth and yield, and overcome disease resistance. Therefore, application of microbial inoculants to alleviate stresses and enhance yield in plants could be a low cost and environmental friendly option for the management of saline soil for better crop productivity.

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