Differential transcript abundance of salt overly sensitive (SOS) pathway genes is a determinant of salinity stress tolerance of wheat

Sathee, Lekshmy; Sairam, R. K.; Chinnusamy, Viswanathan; Jha, Shailendra K.

doi:10.1007/s11738-015-1910-z

Cited by 46 publications

(19 citation statements)

References 39 publications

(40 reference statements)

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“…Moreover, the Na + content of leaves treated with exogenous LNPs was significantly lower compared to that of salt-stressed plants. Wheat seedlings treated with LNPs selectively excluded Na + from leaves, which are the basis tissue of photosynthesis (Lekshmy et al, 2015). Wheat seedlings treated with LNP and LNP-2 exhibited lower leaf Na + content and thus should be better adapted to salt stress.…”

Section: Discussionmentioning

confidence: 99%

“…NHX, an Na + /K + antiporter localized in vacuolar membranes, can mediate Na + regionalization into vacuoles (Gaxiola et al, 2001). Under 200 mM NaCl concentration, SOS1 and NHX1 expression in salt-tolerant wheat genotypes increased significantly, thereby improving Na + exclusion and lowering the Na + /K + ratio (Lekshmy et al, 2015). In this study, TaSOS1 and TaNHX2 overexpression were significantly up-regulated in wheat seedlings treated with LNPs.…”

Section: Discussionmentioning

confidence: 99%

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Polysaccharides Derived From the Brown Algae Lessonia nigrescens Enhance Salt Stress Tolerance to Wheat Seedlings by Enhancing the Antioxidant System and Modulating Intracellular Ion Concentration

Zou

Zhao³

et al. 2019

Front. Plant Sci.

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Soil salinity reduces plant growth and is a major factor that causes decreased agricultural productivity worldwide. Seaweed polysaccharides promote crop growth and improve plant resistance to abiotic stress. In this study, polysaccharides from brown seaweed Lessonia nigrescens polysaccharides (LNP) were extracted and further separated and fractionated. Two acidic polysaccharides (LNP-1 and LNP-2) from crude LNP were obtained and characterized. The latter had a lower molecular weight (MW) (40.2 kDa) than the former (63.9 kDa), but had higher uronic acid and sulfate content. Crude LNP and LNP-2 were composed of mannose, glucuronic acid, fucose, and xylose, whereas LNP-1 has little mannose. Moreover, the effects of the three polysaccharides on plant salt tolerance were investigated. The results showed that crude LNP, LNP-1, and LNP-2 promoted the growth of plants, decreased membrane lipid peroxidation, increased the chlorophyll content, improved antioxidant activities, and coordinated the efflux and compartmentation of intracellular ion. All three polysaccharides could induce plant resistance to salt stress, but LNP-2 was more effective than the other two. The present study allowed to conclude that both MW and sulfate degree contribute to salt resistance capability of polysaccharides derived from L. nigrescens.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Polysaccharides Derived From the Brown Algae Lessonia nigrescens Enhance Salt Stress Tolerance to Wheat Seedlings by Enhancing the Antioxidant System and Modulating Intracellular Ion Concentration

Zou

Zhao³

et al. 2019

Front. Plant Sci.

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“…120 Transcriptome analysis in wheat genotypes revealed that NHX1 and the SOS pathway-related gene expression levels in salt-tolerant genotypes were higher in comparison with their expression in the other genotypes. 121 Moreover, similar research in Aegilops tauschii during long-term exposure to saline stress demonstrated that genes encoding transporters and channels including SOS1, NHXs, HAKs, with contribution to K + hemostasis have been up-regulated. 93 In addition, it was shown that ENA1, which encodes the P-type ATPase required for Na + efflux is expressed by elevation in cytosolic Ca 2+ concentration.…”

Section: Regardless Of Different Functions Of Escbl10a Andmentioning

confidence: 92%

Calcium signaling and salt tolerance are diversely entwined in plants

Seifikalhor

Aliniaeifard

Shomali

et al. 2019

Plant Signaling & Behavior

134

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In plants dehydration imposed by salinity can invoke physical changes at the interface of the plasma membrane and cell wall. Changes in hydrostatic pressure activate ion channels and cause depolarization of the plasma membrane due to disturbance in ion transport. During the initial phases of salinity stress, the relatively high osmotic potential of the rhizosphere enforces the plant to use a diverse spectrum of strategies to optimize water and nutrient uptake. Signals of salt stress are recognized by specific root receptors that activate an osmosensing network. Plant response to hyperosmotic tension is closely linked to the calcium (Ca 2+) channels and interacting proteins such as calmodulin. A rapid rise in cytosolic Ca 2+ levels occurs within seconds of exposure to salt stress. Plants employ multiple sensors and signaling components to sense and respond to salinity stress, of which most are closely related to Ca 2+ sensing and signaling. Several tolerance strategies such as osmoprotectant accumulation, antioxidant boosting, polyaminses and nitric oxide (NO) machineries are also coordinated by Ca 2+ signaling. Substantial research has been done to discover the salt stress pathway and tolerance mechanism in plants, resulting in new insights into the perception of salt stress and the downstream signaling that happens in response. Nevertheless, the role of multifunctional components such as Ca 2+ has not been sufficiently addressed in the context of salt stress. In this review, we elaborate that the salt tolerance signaling pathway converges with Ca 2+ signaling in diverse pathways. We summarize knowledge related to different dimensions of salt stress signaling pathways in the cell by emphasizing the administrative role of Ca 2+ signaling on salt perception, signaling, gene expression, ion homeostasis and adaptive responses.

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“…Among the salt overly sensitive (SOS) genes, SOS1 is a Na + /H + antiporter located in the cell membrane. Its role has already been demonstrated in cytosolic Na + homeostasis by different researchers (Ramezani et al, 2013;Sathee et al, 2015;Yadav et al, 2012). It has been reported that TaSOS1 experssion was up-regulated in the root and the shoot of wheat seedlings under saline condition.…”

Section: Introductionmentioning

confidence: 82%

Salt overly sensitive 1 (SOS1) gene expression can be regulated via Azospirillum brasilense Sp7 in wheat seedlings under saline condition

Ghassemi¹,

Akbar²,

Esmaeili³

2018

AAS

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Salinity stress reduces plant growth via failure of physiological processes mainly due to the abundance of Na+ ion. Salt overly sensitive (SOS) signaling pathway is considered as an important component of Na+/K+ homeostasis system in plants, especially under saline condition. Moreover, it is reported that wheat-Azospirillum associated has resulted in an enhanced salinity tolerance. To evaluate involvement of Azospirillum species in regulation of SOS signaling pathway, inoculated and none-inoculated wheat seedlings with Azospirillum brasilense Sp7 were grown for five days. Then uniform seedlings were transferred into saline hydroponic media with and without 200 mM NaCl. The relative expression of TaSOS1 of root, sheath, and blade as well as Na+/K+ ratio was measured after 6, 24 and 48 hours since inoculated and non-inoculated seedling were transferred to NaCl media. Simultaneously Ca, Fe, proline content, root and shoot dry mass and soluble sugars were measured at 72 hour after application of NaCl. Result showed that salinity increased TaSOS1 gene expression, Na+, prolin and Na+/K+ ratio but Ca and Fe were decreased in root and shoot of wheat seedlings. Although A. brasilense Sp7 could improve salinity tolerance in wheat via reduction of Na uptake and upregulation of TaSOS1 expression, but do not have any effect in sodium distribution within plant parts. Therefore, salinity could increase TaSOS1 expression in the root, sheath and blade and A. brasilense Sp7 also could reduce the adverse effect of salinity via addition of over expression of TaSOS1.

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Differential transcript abundance of salt overly sensitive (SOS) pathway genes is a determinant of salinity stress tolerance of wheat

Cited by 46 publications

References 39 publications

Polysaccharides Derived From the Brown Algae Lessonia nigrescens Enhance Salt Stress Tolerance to Wheat Seedlings by Enhancing the Antioxidant System and Modulating Intracellular Ion Concentration

Polysaccharides Derived From the Brown Algae Lessonia nigrescens Enhance Salt Stress Tolerance to Wheat Seedlings by Enhancing the Antioxidant System and Modulating Intracellular Ion Concentration

Calcium signaling and salt tolerance are diversely entwined in plants

Salt overly sensitive 1 (SOS1) gene expression can be regulated via Azospirillum brasilense Sp7 in wheat seedlings under saline condition

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