Cotton (Gossypium hirsutum L.) genotypes with contrasting K+/Na+ ion homeostasis: implications for salinity tolerance

Wang, Ning; Qi, Haikun; Qiao, Wenqing; Shi, Jianbin; Xu, Qinghua; Zhou, Hong; Yan, Gentu; Huang, Qun

doi:10.1007/s11738-017-2381-1

Cited by 32 publications

(19 citation statements)

References 41 publications

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“…The MDA contents were determined following the previously reported method [19,20]. The leaves of seedlings (0.50 g) were homogenized in 10 mL of 10% (w/v) trichloroacetic acid (TCA) and then centrifuged at 10,000 × g. Approximately 2 mL of 0.6% (w/v) thiobarbituric acid containing 10% (w/v) TCA was added.…”

Section: Determination Of Malondialdehyde (Mda) Content and Antioxidamentioning

confidence: 99%

Salicylic Acid Alleviated Salt Damage of Populus euphratica: A Physiological and Transcriptomic Analysis

Rao

et al. 2019

Forests

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Populus euphratica Oliv. is a model tree for studying abiotic stress, especially salt stress response. Salt stress is one of the most extensive abiotic stresses, which has an adverse effect on plant growth and development. Salicylic acid (SA) is an important signaling molecule that plays an important role in modulating the plant responses to abiotic stresses. To answer whether the endogenous SA can be induced by salt stress, and whether SA effectively alleviates the negative effects of salt on poplar growth is the main purpose of the study. To elucidate the effects of SA and salt stress on the growth of P. euphratica, we examined the morphological and physiological changes of P. euphratica under 300 mM NaCl after treatment with different concentrations of SA. A pretreatment of P. euphratica with 0.4 mM SA for 3 days effectively improved the growth status of plants under subsequent salt stress. These results indicate that appropriate concentrations of exogenous SA can effectively counteract the negative effect of salt stress on growth and development. Subsequently, transcripts involved in salt stress response via SA signaling were captured by RNA sequencing. The results indicated that numerous specific genes encoding mitogen-activated protein kinase, calcium-dependent protein kinase, and antioxidant enzymes were upregulated. Potassium transporters and Na+/H+ antiporters, which maintain K+/Na+ balance, were also upregulated after SA pretreatment. The transcriptome changes show that the ion transport and antioxidant enzymes were the early enhanced systems in response of P. euphratica to salt via SA, expanding our knowledge about SA function in salt stress defense in P. euphratica. This provides a solid foundation for future study of functional genes controlling effective components in metabolic pathways of trees.

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Section: Determination Of Malondialdehyde (Mda) Content and Antioxidamentioning

confidence: 99%

Salicylic Acid Alleviated Salt Damage of Populus euphratica: A Physiological and Transcriptomic Analysis

Rao

et al. 2019

Forests

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“…High sodium accumulation disrupts various metabolic processes in the plants. The ability of plant to uptake minimum sodium ions and retain them in the root zone so that they do not disturb plant metabolic pathways signifies the salt tolerance ability of the plants (Wang et al, 2017a). In our experiment, LALAZAR, S-3 and DEBAL retained the lowest amount of Na + ions inside the plants, whereas, MNH-888 and C-26 absorbed high amount of sodium ions inside their bodies and regarded as salt sensitive genotypes.…”

Section: Discussionmentioning

confidence: 55%

“…In our experiment, LALAZAR, S-3 and DEBAL retained the lowest amount of Na + ions inside the plants, whereas, MNH-888 and C-26 absorbed high amount of sodium ions inside their bodies and regarded as salt sensitive genotypes. High sodium concentration can be developed in the growing material due to lower efficiency of exclusion mechanisms or diffusion through damaged membranes (Wang et al, 2017a). Overall, salinity stress reduced the growth of all traits in the experiment and this reduction of growth can be referred to ionic toxicity of sodium ions in the cell cytoplasm, water shortage in the plant due to the difference of osmotic pressure and ion imbalance or the combination of all above stated factors (Liu et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Genotypic variations in salinity tolerance among Bt cotton

Farooq¹,

Shakeel²,

Atif³

et al. 2019

PAK.J.BOT.

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Salinity stress is one of the most serious environmental problem that negatively affects the growth of plants, especially in arid and semi-arid regions. Scientists have been struggling to address this problem through land reclamation methods and by adding various organic manures into the soil. However, the most cost effective method is to develop salt tolerant varieties. Keeping this in view, fifty cotton genotypes were collected from different areas and were subjected to evaluation. Plants were irrigated with nutrient solution with an electrical conductivity of 10dSm-1 and 15dSm-1 from 10 th day seedlings stage to 40 th day. Plants were harvested when they were 40 days old and the data was compared at absolute value and relative values from the seedlings. Analysis of variance indicated that there were significant differences among genotypes at control and both salinity levels. Results showed that salinity adversely affected the root length, shoot length, fresh root weight, fresh shoot weight, dry shoot weight, dry root weight in comparison to chlorophyll contents. Magnitude of Sodium under NaCl stress increased many folds and reduction in potassium was also witnessed in the leaves. Broad sense heritability was high whereas phenotypic variance is equal or less than genotypic variances. The genotypes that perform better for the trait that had high broad sense heritability were selected as salt tolerant genotypes such as KEHKSHAN, S-3, NIAB-824 and MNH-988 whereas C-26, FH-114 and FH-173 were conceived as salt sensitive genotypes. The results indicate that selection for cotton will be problematic due to masking effects of environment, and imply rigorous and careful selection of salt tolerant genotypes.

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“…Generally, salt stress response in plants is governed by high retention of K + ions and exclusion of Na + from shoots ( Shabala, 2017 ). Similarly, positive correlation between salinity tolerance and K + retention have been evidenced in many salt sensitive plants like alfalfa ( Guo et al, 2016 ), mustard ( Chakraborty et al, 2016 ), wheat ( Wu et al, 2015 ), cucumber ( Redwan et al, 2016 ) and cotton ( Wang et al, 2017 ). It was suggested that Na + absorption pathway is highly dependent on K + channels and K + homeostasis under high NaCl concentration in wild species could be attributed due to tolerate high Na + endogenous concentration ( Gharbi et al, 2018 ).…”

Section: Discussionmentioning

confidence: 86%

Transcriptional regulation-mediating ROS homeostasis and physio-biochemical changes in wild tomato (Solanum chilense) and cultivated tomato (Solanum lycopersicum) under high salinity

Kashyap

Kumari

Mishra

et al. 2020

Saudi Journal of Biological Sciences

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Salinity intrusion is one of the biggest problems in the context of sustainable agricultural practices. The major concern and challenge in developing salt-resistance in cultivated crops is the genetic complexity of the trait and lack of natural variability for stress-responsive traits. In this context, tomato wild relatives are important and have provided novel alleles for breeding abiotic stress tolerance including salt tolerance. We provide here a case study, involving tomato wild relative Solanum chilense and cultivated variety Solanum lycopersicum , carried out under high salt stress to investigate comparative transcriptional regulation mediating ROS homeostasis and other physiological attributes. Salt dependent oxidative stress in S. lycopersicum was characterized by a relatively higher H 2 O 2 content, generation of O 2 •− , electrolytic leakage and lipid peroxidation whereas reduced content of both ascorbate and glutathione. On the contrary, the robust anti-oxidative system in the S. chilense particularly counteracted the salt-induced oxidative damages by a higher fold change in expression profile of defense-related salt-responsive genes along with the increased activities of anti-oxidative enzymes. We conclude that S. chilense harbours novel genes or alleles for salt stress-related traits that could be identified, characterized, and mapped for its possible introgression into cultivated tomato lines.

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Cotton (Gossypium hirsutum L.) genotypes with contrasting K+/Na+ ion homeostasis: implications for salinity tolerance

Cited by 32 publications

References 41 publications

Salicylic Acid Alleviated Salt Damage of Populus euphratica: A Physiological and Transcriptomic Analysis

Salicylic Acid Alleviated Salt Damage of Populus euphratica: A Physiological and Transcriptomic Analysis

Genotypic variations in salinity tolerance among Bt cotton

Transcriptional regulation-mediating ROS homeostasis and physio-biochemical changes in wild tomato (Solanum chilense) and cultivated tomato (Solanum lycopersicum) under high salinity

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