Positive correlation between potassium uptake and salt tolerance in wheat

Cheng, Da; Wu, Guojiang; Zheng, Yu

doi:10.1007/s11099-015-0124-3

Cited by 16 publications

(10 citation statements)

References 39 publications

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“…It has been shown that the phenotypic appearance of the wheat seedlings grown under salinity stress conditions correlate well with their biochemical properties [such as the content of ascorbic acid, H 2 O 2 , MDA (TBARS in our case) and reduced glutathione, (Hasanuzzaman et al, 2011 )]. Several other works also reported that there is a positive correlation between chlorophyll content, the activity of antioxidant defense system and the salt stress tolerance of various wheat cultivars (e.g., Cheng et al, 2015 ; Bharti et al, 2016 ; Jan et al, 2017 ; Kumar et al, 2017 ).…”

Section: Resultsmentioning

confidence: 89%

New Urea Derivatives Are Effective Anti-senescence Compounds Acting Most Likely via a Cytokinin-Independent Mechanism

et al. 2018

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Stress-induced senescence is a global agro-economic problem. Cytokinins are considered to be key plant anti-senescence hormones, but despite this practical function their use in agriculture is limited because cytokinins also inhibit root growth and development. We explored new cytokinin analogs by synthesizing a series of 1,2,3-thiadiazol-5-yl urea derivatives. The most potent compound, 1-(2-methoxy-ethyl)-3-1,2,3-thiadiazol-5-yl urea (ASES - Anti-Senescence Substance), strongly inhibited dark-induced senescence in leaves of wheat (Triticum aestivum L.) and Arabidopsis thaliana. The inhibitory effect of ASES on wheat leaf senescence was, to the best of our knowledge, the strongest of any known natural or synthetic compound. In vivo, ASES also improved the salt tolerance of young wheat plants. Interestingly, ASES did not affect root development of wheat and Arabidopsis, and molecular and classical cytokinin bioassays demonstrated that ASES exhibits very low cytokinin activity. A proteomic analysis of the ASES-treated leaves further revealed that the senescence-induced degradation of photosystem II had been very effectively blocked. Taken together, our results including data from cytokinin content analysis demonstrate that ASES delays leaf senescence by mechanism(s) different from those of cytokinins and, more effectively. No such substance has yet been described in the literature, which makes ASES an interesting tool for research of photosynthesis regulation. Its simple synthesis and high efficiency predetermine ASES to become also a potent plant stress protectant in biotechnology and agricultural industries.

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Section: Resultsmentioning

confidence: 89%

New Urea Derivatives Are Effective Anti-senescence Compounds Acting Most Likely via a Cytokinin-Independent Mechanism

et al. 2018

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“…Grass pea seedlings under 50 mM NaCl, despite increasing content of Na + ions, retained the ability to grow and develop, which may indicate effective Na + sequestration in the vacuoles. Additional to Na + sequestration, plants can endure ion toxicity by taking up and accumulating potassium [ 57 ]. A higher K + ion uptake was observed in salinity tolerant plants than in salinity sensitive plants [ 57 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

Stem Photosynthesis—A Key Element of Grass Pea (Lathyrus sativus L.) Acclimatisation to Salinity

Tokarz

Wesołowski

Tokarz

et al. 2021

IJMS

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Grass pea (Lathyrus sativus) is a leguminous plant of outstanding tolerance to abiotic stress. The aim of the presented study was to describe the mechanism of grass pea (Lathyrus sativus L.) photosynthetic apparatus acclimatisation strategies to salinity stress. The seedlings were cultivated in a hydroponic system in media containing various concentrations of NaCl (0, 50, and 100 mM), imitating none, moderate, and severe salinity, respectively, for three weeks. In order to characterise the function and structure of the photosynthetic apparatus, Chl a fluorescence, gas exchange measurements, proteome analysis, and Fourier-transform infrared spectroscopy (FT-IR) analysis were done inter alia. Significant differences in the response of the leaf and stem photosynthetic apparatus to severe salt stress were observed. Leaves became the place of harmful ion (Na+) accumulation, and the efficiency of their carboxylation decreased sharply. In turn, in stems, the reconstruction of the photosynthetic apparatus (antenna and photosystem complexes) activated alternative electron transport pathways, leading to effective ATP synthesis, which is required for the efficient translocation of Na+ to leaves. These changes enabled efficient stem carboxylation and made them the main source of assimilates. The observed changes indicate the high plasticity of grass pea photosynthetic apparatus, providing an effective mechanism of tolerance to salinity stress.

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“…Salt stress causes significant decreases in the growth and productivity of crops, but the application of potassium was found to improve the growth and biomass yield of bean under salt stress (Dawood et al 2014). Cheng et al (2015) found that plant salt tolerance might be positively correlated with plant abilities for K + transport and retention, higher K + affinity may be a key factor for better PNmax/biomass yields of wheat under salt stress. Also, Chakraborty et al (2016) reported that potassium had a significant effect on salt tolerance in peanut, which was reflected in reduced Na + uptake achieved by adjusting the tissue ionic balance and improving biomass production.…”

Section: Introductionmentioning

confidence: 99%

External potassium mediates the response and tolerance to salt stress in peanut at the flowering and needling stages

Shi¹,

Zhou²,

Guo³

et al. 2020

Photosynt.

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Potassium (K) is an essential macronutrient that plays an important role in abiotic stress tolerance. A pot experiment was carried out to identify the potential role of potassium fertilizer in alleviating salt stress in peanut. The results showed that salt stress significantly decreased plant height, dry mass, photosynthetic pigments, the photosynthetic rate, and stomatal conductance, but increased the Na + /K + ratio, total sugars, and the leaf salinity hazard coefficient in two peanut varieties. However, the application of potassium significantly alleviated the harmful effect of salt by improving the contents of photosynthetic pigments and enhancing K + /Na + ratios and osmolytes in both varieties. In general, HY25 showed a superior osmoregulation ability compared to that of HY33 and was less dependent on K + to maintain osmotic balance. Therefore, HY33 showed a better response to potassium application, and the treatment by 170 kg(K2O) ha-1 was found to be the most effective in alleviating the harmful effects of salt. In conclusion, potassium reduced the toxic effect of salt and significantly enhanced salt tolerance.

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Positive correlation between potassium uptake and salt tolerance in wheat

Cited by 16 publications

References 39 publications

New Urea Derivatives Are Effective Anti-senescence Compounds Acting Most Likely via a Cytokinin-Independent Mechanism

New Urea Derivatives Are Effective Anti-senescence Compounds Acting Most Likely via a Cytokinin-Independent Mechanism

Stem Photosynthesis—A Key Element of Grass Pea (Lathyrus sativus L.) Acclimatisation to Salinity

External potassium mediates the response and tolerance to salt stress in peanut at the flowering and needling stages

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