Rice Shaker potassium channel OsAKT2 positively regulates salt tolerance and grain yield by mediating K + redistribution

2021 ◽  
Author(s):  
Quanxiang Tian ◽  
Like Shen ◽  
Junxia Luan ◽  
Zhenzhen Zhou ◽  
Dongshu Guo ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Potassium Channel ◽  
Grain Yield ◽  
Shaker Potassium Channel

scholarly journals Evaluation of salinity tolerance indices in North African barley accessions at reproductive stage

2019 ◽  
Vol 55 (No. 2) ◽  
pp. 61-69 ◽  
Author(s):  
Dorsaf Allel ◽  
Anis BenAmar ◽  
Mounawer Badri ◽  
Chedly Abdelly
Keyword(s):  
Salt Tolerance ◽  
Grain Yield ◽  
Salinity Tolerance ◽  
Selection Criteria ◽  
Reproductive Stage ◽  
Shoot Biomass ◽  
Salt Tolerant ◽  
North African ◽  
Grain Number ◽  
Selection Indices

Soil salinity is one of the main factors limiting cereal productivity in worldwide agriculture. Exploitation of natural variation in local barley germplasm is an effective approach to overcome yield losses. Three gene pools of North African Hordeum vulgare L. grown in Tunisia, Algeria and Egypt were evaluated at the reproductive stage under control and saline conditions. Assessment of stress tolerance was monitored using morphological, yield-related traits and phenological parameters of reproductive organs showing significant genetic variation. High heritability and positive relationships were found suggesting that some traits associated with salt tolerance could be used as selection criteria. The phenotypic correlations revealed that vegetative traits including shoot biomass, tiller number and leaf number along with yield-related traits such as spike number, one spike dry weight, grain number/plant and grain number/spike were highly positively correlated with grain yield under saline conditions. Hence, these traits can be used as reliable selection criteria to improve barley grain yield. Keeping a higher shoot biomass and longer heading and maturity periods as well as privileged filling ability might contribute to higher grain production in barley and thus could be potential target traits in barley crop breeding toward improvement of salinity tolerance. Multiple selection indices revealed that salt tolerance trait index provided a better discrimination of barley landraces allowing selection of highly salt-tolerant and highly productive genotypes under severe salinity level. Effective evaluation of salt tolerance requires an integration of selection indices to successfully identify and characterize salt tolerant lines required for valuable exploitation in the management of salt-affected areas.  

scholarly journals Biophysical Properties of Three Omega Gaps Along the Voltage Sensor S4 of Shaker Potassium Channel

2010 ◽  
Vol 98 (3) ◽  
pp. 521a
Author(s):  
Tamer M. Gamal El-Din ◽  
Hansjakob Heldstab ◽  
Claudia Lehmann ◽  
Nikolaus G. Greeff
Keyword(s):  
Potassium Channel ◽  
Voltage Sensor ◽  
Biophysical Properties ◽  
Shaker Potassium Channel

scholarly journals A shaker Potassium Channel with a Miniature Engineered Voltage Sensor

2011 ◽  
Vol 100 (3) ◽  
pp. 367a
Author(s):  
Yajamana Ramu ◽  
Yanping Xu ◽  
Zhe Lu
Keyword(s):  
Potassium Channel ◽  
Voltage Sensor ◽  
Shaker Potassium Channel

scholarly journals Dynamics of Pore Domain Affected by Single Mutations in S4 Segment of Shaker Potassium Channel

2019 ◽  
Vol 116 (3) ◽  
pp. 101a
Author(s):  
Carlos Alberto ◽  
Z. Bassetto Jr ◽  
Joao Luis Carvalho-de-Souza ◽  
Francisco Bezanilla
Keyword(s):  
Potassium Channel ◽  
Shaker Potassium Channel ◽  
Pore Domain ◽  
S4 Segment

scholarly journals Identification of genes for salt tolerance and yield-related traits in rice plants grown hydroponically and under saline field conditions by genome-wide association study

Rice ◽  
2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Chen Liu ◽  
Kai Chen ◽  
Xiuqin Zhao ◽  
Xiaoqian Wang ◽  
Congcong Shen ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Grain Yield ◽  
Association Study ◽  
Genome Wide Association Study ◽  
Field Conditions ◽  
Genome Wide Association ◽  
Saline Stress ◽  
Rice Breeding ◽  
Genome Wide

Abstract Background Soil salinity is one of the main environmental conditions that affects rice production. Identifying the genetic loci that affect rice salt tolerance (ST)-related traits at the seedling stage, especially under saline field conditions, is crucial for ST rice breeding by pyramiding ST genes that act at different developmental stages. Results Large phenotypic variations were observed in 708 rice accessions, and yield and its related traits were considerably limited when exposed to salt stress. In a genome-wide association study (GWAS), 2255 marker-trait association signals were detected for all measured traits, and the significant SNPs were distributed in 903 genes. Of these, 43 genes processed same functional annotation, and the gene ontology terms “biological processes” and “molecular function” with the known genes responsive to salt stress in rice. Further haplotype analysis detected 15 promising candidates significantly associated with the target traits, including five known genes and 10 novel genes. We identified seven accessions carrying favorable haplotypes of four genes significantly associated with grain yield that performed well under saline stress conditions. Conclusions Using high density SNPs within genes to conduct GWAS is an effective way to identify candidate genes for salt tolerance in rice. Five known genes (OsMYB6, OsGAMYB, OsHKT1;4, OsCTR3, and OsSUT1) and two newly identified genes (LOC_Os02g49700, LOC_Os03g28300) significantly associated with grain yield and its related traits under saline stress conditions were identified. These promising candidates provide valuable resources for validating potential ST-related genes and will facilitate rice breeding for salt tolerance through marker-assisted selection.

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