Differential response of Indian mustard (Brassica juncea L., Czern and Coss) under salinity: photosynthetic traits and gene expression

Singh, Jogendra; Singh, V. P.; Kumar, Parveen; Kumar, Neeraj; Sharma, Parbodh Chander

doi:10.1007/s12298-018-0631-3

Cited by 29 publications

(12 citation statements)

References 77 publications

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“…Salinity tolerance is related to the ability of plant to maintain lower Na + /K + ratio [44] rather than simply maintaining lower Na + concentration. Higher salinity stress caused high sodium uptake and increased Na + /K + ratio values cause sodicity, which increase soil resistance, reduces root growth and reduces water movement through the root with a decrease in hydraulic conductivity [45] and its reduction depends upon the salt content of the irrigation water used thus affecting the level of water absorption 46] maintaining ion homeostasis by ion exclusion and compartmentalization is an essential process for growth during salt stress. Controlled Na + uptake and lower Na + /K + reduced the toxic effect of Na + in the cytosol and increasing cell water uptake [47] Tomato plants under salt stress exhibited a decrease of K + / Na + ratio in both leaves and mature fruits.…”

Section: Discussionmentioning

confidence: 99%

Regulation of salinity tolerance in Brassica juncea (L.) introgression lines: Osmoprotectants, antioxidative molecules and ionic content

Priya¹,

Sharma²,

Choudhary³

et al. 2021

GSC Adv. Res. Rev.

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Indian mustard [Brassica juncea (L.) Czern & Coss] is one of the most important oilseed crops worldwide yet drought and salinity stress significantly reduced its growth and yield. The research was carried out in order to test the effect of salinity on osmoprotectants (total soluble sugars, proline), antioxidant molecules (ascorbate, α-tocopherol) and ionic content from the dry sample of the leaves in introgression lines and varieties of Brassica juncea. Permanent saline plots are maintained in the field of soil sciences where different doses of sodium carbonate were given to maintain the relative sodium bicarbonate (RSC) to three levels. The results revealed the significant effect of salinity on biochemical attributes as well as on ionic content. Increase in total soluble sugars, proline, ascorbate, α-tocopherol and Na+ ion whereas rest of the ions Ca2+, Mg2+ and K+ decreased with increased salinity levels. Increased accumulation of Na+ increased the Na+/K+ ratio and decreased the K+/Na+. Significant finding among the introgression lines and varieties revealed low Na+ and high K+ correspondingly Na+/K+ low and K+/Na+ ratio. Decreased calcium and magnesium ion resulted in decline in chlorophyll content and membrane stability under saline conditions while decreased K+ concentration regulated the opening and closing of stomata thus hampering photosynthesis.

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Section: Discussionmentioning

confidence: 99%

Regulation of salinity tolerance in Brassica juncea (L.) introgression lines: Osmoprotectants, antioxidative molecules and ionic content

Priya¹,

Sharma²,

Choudhary³

et al. 2021

GSC Adv. Res. Rev.

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“…The traits like main shoot length, number of pods on main shoot and yield per plot could be improved effectively by selection as these might be controlled by additive genes. Indian mustard, which was thought to be the moderately salt-tolerant species, also showed a decrease in shoot length and root length, electrolyte leakage, protein content, K + /Na + ratio due to differential regulation of Na + in root and main stem by inhibition of entry from roots to shoot and retain higher photosynthetic characteristics than other species [10]. The fencing of selection processes should therefore be based on such indicators as a priority in the development of the most productive varieties of Indian mustard for saline condition.…”

Section: The Genetic Basis Of Salt Tolerance In Brassicaceaementioning

confidence: 99%

“…The molecular mechanism of salt tolerance expressed in model plants will facilitate the identification of target genes and the development of transgenic salt-tolerant plants in Brassica plants (Figure 5). Overexpression of antiporters (SOS1, SOS2, SOS3, ENH and NHX) as well as antioxidant genes (MPK1, DHAR3, APX1, APX4 and MDHAR6) in mustard play an important role in reducing the effects of salt and enhance salt tolerance [10].…”

Section: The Molecular Basis Of Salt Tolerance In Brassicaceaementioning

confidence: 99%

“…In addition, unhealthy nutritional imbalances due to stress-induced nutrient uptake; depletion in the germination, chlorophyll and mineral ions slow down seed growth and early crop maturity under high salt intake can be attributed to reduced oil content [8,9]. Further the salinity also significantly reduced net photosynthesis, stomatal conductance, water use efficiency and transpiration under during the formation of siliqua results in the greater yield loss [10].…”

Section: Introductionmentioning

confidence: 99%

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Breeding Mustard (Brassica juncea) for Salt Tolerance: Problems and Prospects

Singh¹,

Sharma²,

Singh³

2021

Brassica Breeding and Biotechnology

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Salt stress is currently one of the most critical factors, reducing agricultural production. Indian mustard (Brassica juncea) is a major oilseed crop in these areas. However, salt affects as much as 50–90% worldwide yield reduction. Salt tolerance is a very complex factor controlled by a number of independent and/or interdependent mechanisms and genetic modification that lead to many changes in physiology and biochemistry at the cellular level. The classical methods of plant breeding for salt tolerance involves the widespread use of inter and intraspecific variations in the available germplasm which is essential for any crop development program. This large germplasm is then tested under various salt levels in microplots, which is a quick, reliable, reproducible and inexpensive method of salt tolerance. Genotypes that have shown better indications of stress tolerance without significant yield reduction are considered to be tolerant and are also used as potential donor in the breeding programs. In this way, ICAR-Central Soil Salinity Research Institute (ICAR-CSSRI), Karnal developed and produced five varieties of Indian mustard that tolerate high salt namely, CS 52, CS 54, CS 56, CS 58 and CS 60 in the country, and many other high-quality pipeline lines exploration and development. These salt-tolerant species work better under conditions of salt stress due to various manipulations (physiology, genes and molecular level) to fight salt stress has led to detrimental effects. Recent molecular tools to add classical breeding systems to improve saline-tolerant mustard varieties in a short span of time, including the Marker Assisted Selection (MAS) and backcrossing, that have helped using simple sequence repeats (SSR) and single nucleotide polymorphisms (SNP) markers to identify quantitative trait loci (QTLs) that control the polygenic traits like tolerance of salt and seed yield.

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“…Various physiological and biochemical traits like seedling survivability, salinity score, seedling growth and biomass, Na + and Cl − accumulation, production of H 2 O 2, antioxidant activities etc. have been used for characterization of salinity tolerance at the seedling stage in crop plants (Singh et al., 2017; Singh et al., 2018a; Singh et al., 2018b). Among the above traits, seedling survivability and FDA based fluorescent signals (indicating production of H 2 O 2 ) are the major traits to visually distinguish between salt‐tolerant and salt‐sensitive genotypes (Singh et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Genetics and molecular mapping for salinity stress tolerance at seedling stage in lentil (Lens culinarisMedik)

Singh

Tomar

et al. 2020

Crop Science

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An investigation was conducted to understand the genetics and molecular mapping for salinity stress tolerance in lentil at the seedling stage. The populations were developed through crossing between salt sensitive (L-4147 and L-4076) and salt-tolerant (PDL-1 and PSL-9) genotypes. The parents, F 1 , F 2 , F 3 and backcross populations were assayed in salt solution at 120 mM NaCl for assessing salinity stress tolerance based on seedling survival and a Fluorescein diacetate (FDA) signal. The F 1s were found tolerant to salinity stress indicating their dominance over the sensitive ones. The F 2 segregation fitted well with the expected monogenic frequency ratio of salttolerant: salt-sensitive plants, which indicates that salinity stress tolerance is governed by a single dominant gene. This was also confirmed in F 3 and backcross segregation data. Allelism test supported the hypothesis that the same gene was conferring stress tolerance in tolerant genotypes (PDL-1 and PSL-9). This matched with major QTL of seedling survival under salinity stress. Four hundred and ninety-five SSR markers were analyzed for polymorphism and 11 of them were found polymorphic between the parents. Among eleven polymorphic markers, seven were associated with seedling survival under salinity stress. The QTL of this trait was mapped within a map distance of 133.02 cM in F 2 mapping population (L-4147 × PDL-1) and it was found located on linkage group 1 (LG_1) and explained phenotypic variance of 65.6%. This report on QTL mapping should be useful for dissection of candidate genes and development of molecular markers for improvement of salinity stress tolerance in lentil.Salinity in soil and irrigation water is the main limiting factor for lentil productivity, especially in dry and semi-arid tropic Abbreviations: CIM, composite interval mapping; FDA, fluorescein diacetate; LOD, logarithm of odds; QTL, quantitative trait locus; SSR, simple sequence repeat.

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Differential response of Indian mustard (Brassica juncea L., Czern and Coss) under salinity: photosynthetic traits and gene expression

Cited by 29 publications

References 77 publications

Regulation of salinity tolerance in Brassica juncea (L.) introgression lines: Osmoprotectants, antioxidative molecules and ionic content

Regulation of salinity tolerance in Brassica juncea (L.) introgression lines: Osmoprotectants, antioxidative molecules and ionic content

Breeding Mustard (Brassica juncea) for Salt Tolerance: Problems and Prospects

Genetics and molecular mapping for salinity stress tolerance at seedling stage in lentil (Lens culinarisMedik)

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