Approaches to Increasing Salt Tolerance in Crop Plants

Karan, Ratna; Subudhi, Prasanta K.

doi:10.1007/978-1-4614-0634-1_4

Cited by 20 publications

(8 citation statements)

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“…). Genetic variation in leaf Na + and K + /Na + ratio indicates the possibility of genetic improvement of salt tolerance (Karan & Subudhi ). Sufficient genetic variations for leaf Na + contents and K + /Na + ratio were found in this panel.…”

Section: Discussionmentioning

confidence: 99%

Allelic variations and differential expressions detected at quantitative trait loci for salt stress tolerance in wheat

Oyiga

Sharma

Baum³

et al. 2017

Plant Cell & Environment

106

109

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The increasing salinization of agricultural lands is a threat to global wheat production. Understanding of the mechanistic basis of salt tolerance (ST) is essential for developing breeding and selection strategies that would allow for increased wheat production under saline conditions to meet the increasing global demand. We used a set that consists of 150 internationally derived winter and facultative wheat cultivars genotyped with a 90K SNP chip and phenotyped for STacross three growth stages and for ionic (leaf K + and Na + contents) traits to dissect the genetic architecture regulating ST in wheat. Genome-wide association mapping revealed 187 Single Nucleotide Polymorphism (SNPs) (R 2 = 3.00-30.67%), representing 37 quantitative trait loci (QTL), significantly associated with the ST traits. Of these, four QTL on 1BS, 2AL, 2BS and 3AL were associated with ST across the three growth stages and with the ionic traits. Novel QTL were also detected on 1BS and 1DL. Candidate genes linked to these polymorphisms were uncovered, and expression analyses were performed and validated on them under saline and non-saline conditions using transcriptomics and qRT-PCR data. Expressed sequence comparisons in contrasting ST wheat genotypes identified several non-synonymous/missense mutation sites that are contributory to the ST trait variations, indicating the biological relevance of these polymorphisms that can be exploited in breeding for ST in wheat.

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Section: Discussionmentioning

confidence: 99%

Allelic variations and differential expressions detected at quantitative trait loci for salt stress tolerance in wheat

Oyiga

Sharma

Baum³

et al. 2017

Plant Cell & Environment

106

109

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“…De acordo com Karan & Subudhi (2012) essa planta possui capacidade de adaptação a uma vasta gama de fatores climáticos, topográficos e edáficos.…”

Section: Introductionunclassified

Crescimento inicial e consumo hídrico de nim submetido ao estresse salino e biofertilizante bovino

Diniz

Cavalcante

Mesquita

et al. 2013

Agraria

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RESUMOUm experimento foi desenvolvido no período de janeiro a julho de 2010, no município de Areia, PB, para avaliar o efeito da irrigação com águas salinas, biofertilizante bovino e drenagem do solo sobre o consumo hídrico e o crescimento de mudas de nim. O delineamento experimental foi em blocos casualizados com os tratamentos arranjados no esquema fatorial 5 x 2 x 2, com quatro repetições. As plantas foram irrigadas com águas salinas de cinco níveis de salinidade (0,5; 1,5; 3,0; 4,5; 6,0 dS m -1 ) no solo sem e com biofertilizante bovino, em vasos sem e com drenagem na parte final inferior. Nas plantas foram avaliados consumo de água, altura de plantas, diâmetro do caule, número de folhas, matéria seca de raiz, da parte aérea e matéria seca total; no solo, a condutividade elétrica do extrato de saturação -CEes. Depois de diluído em água não salina e não clorada (0,46 dS m -1 ), na razão de 1:1, o biofertilizante foi aplicado uma única vez, dois dias antes da semeadura, a nível de 10% do volume do substrato. A irrigação foi feita diariamente com cada tipo de água fornecendo um volume suficiente para elevar a umidade do solo para o nível de capacidade de campo. Pelos resultados, o aumento da salinidade das águas inibiu o consumo hídrico das plantas, independentemente do solo sem ou com biofertilizante. A salinidade da água no solo sem e com biofertilizante inibiu o crescimento do nim porém com maior drasticidade nos tratamentos sem o insumo orgânico aplicado ao solo na forma líquida. Palavras-chave: fertilização orgânica, nim indiano, salinidadeInitial growth and water consumption of neem under salt stress and bovine biofertilizer ABSTRACT An experiment was carried out during the period of January to July/2010, in municipality of Areia, Paraiba State, Brazil, in order to evaluate effects of the irrigation with saline water, bovine biofertilizer and drainage of the soil on water consumption and growth of neem seedlings. The experimental design was in randomized blocks using factorial 5x2x2, referring to five levels of saline water (0.5; 1.5; 3.0; 4.5; 6.0 dS m -1 ) in soil without and with bovine biofertilizer and in pots without and with drainage. In plants the water consumption, growth in height, stem diameter, number of leaves, dry matter of roots, aerial part and total dry mass were evaluated and in soil the electrical conductivity of saturation extract -EC was determined. The bovine biofertilizer, after dilution in non saline water (0.49 dS m -1 ) e no chlorinated water in 1:1 ratio was applied once two days before sowing, equivalent to 10% of substrate volume. Irrigation was applied daily with each water type applying volume sufficient to maintain the soil with water content at level of field capacity. From results the increase in salinity of water inhibited the water consumption by plants independently of the soil with or without bovine biofertilizer. The salinity of water in soil with and without bovine biofertilizer also reduced the growth of neem plants but with more pronounced effect in the treat...

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“…Our study demonstrated large variation in various parameters among different wheat varieties at seedling stage under salinity stress ( Table 1 ). The salt-tolerance index was employed for GWAS, as it is considered a reliable measure for assessing salt tolerance, which permits the control for background effects among different genotypes ( Karan and Subudhi, 2012 ; Long et al, 2013 ; Kan et al, 2015 ). Significant genetic variations for the agronomic traits measured and shoot Na contents and Na/K ratio in this panel indicated the possibility of genetic improvement of salt tolerance ( Yong et al, 2015 ; Oyiga et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Association Study Uncover the Genetic Architecture of Salt Tolerance-Related Traits in Common Wheat (Triticum aestivum L.)

et al. 2021

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Soil salinity is a serious threat to wheat yield affecting sustainable agriculture. Although salt tolerance is important for plant establishment at seedling stage, its genetic architecture remains unclear. In the present study, we have evaluated eight salt tolerance–related traits at seedling stage and identified the loci for salt tolerance by genome-wide association study (GWAS). This GWAS panel comprised 317 accessions and was genotyped with the wheat 90 K single-nucleotide polymorphism (SNP) chip. In total, 37 SNPs located at 16 unique loci were identified, and each explained 6.3 to 18.6% of the phenotypic variations. Among these, six loci were overlapped with previously reported genes or quantitative trait loci, whereas the other 10 were novel. Besides, nine loci were detected for two or more traits, indicating that the salt-tolerance genetic architecture is complex. Furthermore, five candidate genes were identified for salt tolerance–related traits, including kinase family protein, E3 ubiquitin-protein ligase-like protein, and transmembrane protein. SNPs identified in this study and the accessions with more favorable alleles could further enhance salt tolerance in wheat breeding. Our results are useful for uncovering the genetic mechanism of salt tolerance in wheat at seeding stage.

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Approaches to Increasing Salt Tolerance in Crop Plants

Cited by 20 publications

References 166 publications

Allelic variations and differential expressions detected at quantitative trait loci for salt stress tolerance in wheat

Allelic variations and differential expressions detected at quantitative trait loci for salt stress tolerance in wheat

Crescimento inicial e consumo hídrico de nim submetido ao estresse salino e biofertilizante bovino

Genome-Wide Association Study Uncover the Genetic Architecture of Salt Tolerance-Related Traits in Common Wheat (Triticum aestivum L.)

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