External potassium (K+) application improves salinity tolerance by promoting Na+-exclusion, K+-accumulation and osmotic adjustment in contrasting peanut cultivars

Chakraborty, Koushik; Bhaduri, Debarati; Meena, H. N.; Kalariya, Kuldeepsingh A.

doi:10.1016/j.plaphy.2016.02.039

Cited by 123 publications

(68 citation statements)

References 42 publications

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“…Tolerant genotypes are able to maintain K + homeostasis during all the salt stress stages (Shabala and Cuin 2008; Hauser and Horie 2010). Therefore, K + is considered as a key regulatory element in plant metabolic process by promoting Na + exclusion and osmotic adjustment (Chakraborty et al 2016). In our experiments, leaves of tolerant and sensitive tomato genotypes behaved similarly, at the later stage of salt treatment, although the tolerant genotype accumulated significantly more K + in its roots.…”

Section: Discussionmentioning

confidence: 99%

Effect of salt stress on ion concentration, proline content, antioxidant enzyme activities and gene expression in tomato cultivars

Gharsallah¹,

Fakhfakh²,

Grubb³

et al. 2015

AoB PLANTS

212

113

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Understanding plant response to salinity, one of the major abiotic stresses, provides insights into the improvement of tomato salt tolerance. This work focuses on the responses of tomato cultivars to salt stress. Genotypes, representative of content and enzyme activities. QPCR analysis of WRKY, ERF, LeNHX and HKT genes was also performed. A high K+, Ca2+ and proline accumulation as well as a decrease in Na+ concentration mediated salt tolerance. Concomitant with a pattern of high antioxidant enzyme activities, tolerant genotypes also displayed differential patterns of gene expression.

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Section: Discussionmentioning

confidence: 99%

Effect of salt stress on ion concentration, proline content, antioxidant enzyme activities and gene expression in tomato cultivars

Gharsallah¹,

Fakhfakh²,

Grubb³

et al. 2015

AoB PLANTS

212

113

View full text Add to dashboard Cite

show abstract

“…Ion channels regulate osmotic balance during environmental stress (Haynes, 1990), SNP IWB35315 at q6D was linked to FW _C_H and Na + _C_2018 . Moreover, enhancing K acquisition improves salinity tolerance of plants by Na + exclusion (Chakraborty et al, 2016). Five of the 11 stable loci had SNPs from hydroponics as well as field traits ( Table 3), which suggests that the hydroponic experiment for Kdeficiency stress can be used to evaluate a large-scale field study.…”

Section: Novel Snp-trait Associations and Mqtlmentioning

confidence: 99%

Genome-Wide Association Study and QTL Meta-Analysis Identified Novel Genomic Loci Controlling Potassium Use Efficiency and Agronomic Traits in Bread Wheat

et al. 2020

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Potassium use efficiency, a complex trait, directly impacts the yield potential of crop plants. Low potassium efficiency leads to a high use of fertilizers, which is not only farmer unfriendly but also deteriorates the environment. Genome-wide association studies (GWAS) are widely used to dissect complex traits. However, most studies use singlelocus one-dimensional GWAS models which do not provide true information about complex traits that are controlled by multiple loci. Here, both single-locus GWAS (MLM) and multi-locus GWAS (pLARmEB, FASTmrMLM, mrMLM, FASTmrEMMA) models were used with genotyping from 90 K Infinium SNP array and phenotype derived from four normal and potassium-stress environments, which identified 534 significant marker-trait associations (MTA) for agronomic and potassium related traits: pLARmEB = 279, FASTmrMLM = 213, mrMLM = 35, MLM = 6, FASTmrEMMA = 1. Further screening of these MTA led to the detection of eleven stable loci: q1A, q1D, q2B-1, q2B-2, q2D, q4D, q5B-1, q5B-2, q5B-3, q6D, and q7A. Moreover, Meta-QTL (MQTL) analysis of four independent QTL studies for potassium deficiency in bread wheat located 16 MQTL on 13 chromosomes. One locus identified in this study (q5B-1) colocalized with an MQTL (MQTL _11 ), while the other ten loci were novel associations. Gene ontology of these loci identified 20 putative candidate genes encoding functional proteins involved in key pathways related to stress tolerance, sugar metabolism, and nutrient transport. These findings provide potential targets for breeding potassium stress resistant wheat cultivars and advocate the advantages of multi-locus GWAS models for studying complex traits.

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“…Peanut or groundnut (Arachis hypogaea L.), an important nutritious food and cash crop, is consumed both as oilseed and livestock fodder, forming an important revenue source for farmers [1,2]. As a moderately salt-sensitive species, cultivation of peanuts was attempted in low-salinity fields in China to gain more crop production [3,4]. Peanuts growing in these types of fields are impaired by soil salinity throughout their life cycle and their seed germination is the more sensitive stage to salt stress [3,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Salt Stress on Growth of Spermosphere Bacterial Communities in Different Peanut (Arachis hypogaea L.) Cultivars

Zhang

Dai

et al. 2020

IJMS

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Background: Exposure of seeds to high salinity can cause reduced germination and poor seedling establishment. Improving the salt tolerance of peanut (Arachis hypogaea L.) seeds during germination is an important breeding goal of the peanut industry. Bacterial communities in the spermosphere soils may be of special importance to seed germination under salt stress, whereas extant results in oilseed crop peanut are scarce. Methods: Here, bacterial communities colonizing peanut seeds with salt stress were characterized using 16S rRNA gene sequencing. Results: Peanut spermosphere was composed of four dominant genera: Bacillus, Massilia, Pseudarthrobacter, and Sphingomonas. Comparisons of bacterial community structure revealed that the beneficial bacteria (Bacillus), which can produce specific phosphatases to sequentially mineralize organic phosphorus into inorganic phosphorus, occurred in relatively higher abundance in salt-treated spermosphere soils. Further soil enzyme activity assays showed that phosphatase activity increased in salt-treated spermosphere soils, which may be associated with the shift of Bacillus. Conclusion: This study will form the foundation for future improvement of salt tolerance of peanuts at the seed germination stage via modification of the soil microbes.

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External potassium (K+) application improves salinity tolerance by promoting Na+-exclusion, K+-accumulation and osmotic adjustment in contrasting peanut cultivars

Cited by 123 publications

References 42 publications

Effect of salt stress on ion concentration, proline content, antioxidant enzyme activities and gene expression in tomato cultivars

Effect of salt stress on ion concentration, proline content, antioxidant enzyme activities and gene expression in tomato cultivars

Genome-Wide Association Study and QTL Meta-Analysis Identified Novel Genomic Loci Controlling Potassium Use Efficiency and Agronomic Traits in Bread Wheat

Influence of Salt Stress on Growth of Spermosphere Bacterial Communities in Different Peanut (Arachis hypogaea L.) Cultivars

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