Calcium signaling during salt stress and in the regulation of ion homeostasis

Manishankar, Prabha; Wang, Nili; Köster, Philipp; Alatar, Abdulrahman A.; Kudla, Jörg

doi:10.1093/jxb/ery201

Cited by 223 publications

(125 citation statements)

References 119 publications

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“…Therefore, it can be concluded that the responses of A. alba seedlings to stress include constitutive mechanisms based on the accumulation in needles of Na + and other inorganic ions, without reaching toxic levels. The increase in Ca 2+ concentration in parallel to increasing soil salinity should also be considered as a mechanism of tolerance against salt stress, as the role of calcium counteracting the harmful effects of NaCl is well established [71].…”

Section: Effect Of Salt Stress On Ion Accumulationmentioning

confidence: 99%

Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

(Morar)

González-Orenga

Boscaiu

et al. 2020

Forests

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Forest ecosystems are frequently exposed to abiotic stress, which adversely affects their growth, resistance and survival. For silver fir (Abies alba), the physiological and biochemical responses to water and salt stress have not been extensively studied. Responses of one-year-old seedlings to a 30-day water stress (withholding irrigation) or salt stress (100, 200 and 300 mM NaCl) treatments were analysed by determining stress-induced changes in growth parameters and different biochemical markers: accumulation of ions, different osmolytes and malondialdehyde (MDA, an oxidative stress biomarker), in the seedlings, and activation of enzymatic and non-enzymatic antioxidant systems. Both salt and water stress caused growth inhibition. The results obtained indicated that the most relevant responses to drought are based on the accumulation of soluble carbohydrates as osmolytes/osmoprotectants. Responses to high salinity, on the other hand, include the active transport of Na+, Cl− and Ca2+ to the needles, the maintenance of relatively high K+/Na+ ratios and the accumulation of proline and soluble sugars for osmotic balance. Interestingly, relatively high Na+ concentrations were measured in the needles of A. alba seedlings at low external salinity, suggesting that Na+ can contribute to osmotic adjustment as a ‘cheap’ osmoticum, and its accumulation may represent a constitutive mechanism of defence against stress. These responses appear to be efficient enough to avoid the generation of high levels of oxidative stress, in agreement with the small increase in MDA contents and the relatively weak activation of the tested antioxidant systems.

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Section: Effect Of Salt Stress On Ion Accumulationmentioning

confidence: 99%

Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

(Morar)

González-Orenga

Boscaiu

et al. 2020

Forests

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“…The signs are expressed throughout development, including germination, seedling stage, vegetative growth, and flowering. Salt stress involves the induction of signals that are influenced by diverse signaling pathways [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Salinity Stress-Mediated Suppression of Expression of Salt Overly Sensitive Signaling Pathway Genes Suggests Negative Regulation by AtbZIP62 Transcription Factor in Arabidopsis thaliana

Kabange

Imran

Lee

et al. 2020

IJMS

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Salt stress is one of the most serious threats in plants, reducing crop yield and production. The salt overly sensitive (SOS) pathway in plants is a salt-responsive pathway that acts as a janitor of the cell to sweep out Na + ions. Transcription factors (TFs) are key regulators of expression and/or repression of genes. The basic leucine zipper (bZIP) TF is a large family of TFs regulating various cellular processes in plants. In the current study, we investigated the role of the Arabidopsis thaliana bZIP62 TF in the regulation of SOS signaling pathway by measuring the transcript accumulation of its key genes such as SOS1, 2, and 3, in both wild-type (WT) and atbzip62 knock-out (KO) mutants under salinity stress. We further observed the activation of enzymatic and non-enzymatic antioxidant systems in the wild-type, atbzip62, atcat2 (lacking catalase activity), and atnced3 (lacking 9-cis-epoxycarotenoid dioxygenase involved in the ABA pathway) KO mutants. Our findings revealed that atbzip62 plants exhibited an enhanced salt-sensitive phenotypic response similar to atnced3 and atcat2 compared to WT, 10 days after 150 mM NaCl treatment. Interestingly, the transcriptional levels of SOS1, SOS2, and SOS3 increased significantly over time in the atbzip62 upon NaCl application, while they were downregulated in the wild type. We also measured chlorophyll a and b, pheophytin a and b, total pheophytin, and total carotenoids. We observed that the atbzip62 exhibited an increase in chlorophyll and total carotenoid contents, as well as proline contents, while it exhibited a non-significant increase in catalase activity. Our results suggest that AtbZIP62 negatively regulates the transcriptional events of SOS pathway genes, AtbZIP18 and AtbZIP69 while modulating the antioxidant response to salt tolerance in Arabidopsis.

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“…In ectomycorrhizal symbiosis, Pi and K + had interactions in membrane transport and transfer to host plants [27], while high K + concentration had a negative effect on Pi nutrition in Arabidopsis [28]. In addition, Ca 2+ indicated the development of plant roots and the ability to adapt to stress stimulation [29,30], and Matthus [31] had shown that when Pi was starved, Arabidopsis root tips showed a strong spatiotemporal [Ca 2+ ]cyt response to eATP. However, the molecular mechanisms involved in drought stress and phosphorus interaction have not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of combined phosphorus and drought stress-responses in two winter wheat

Zhang

Wang

et al. 2020

Preprint

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Phosphorus stress and drought stress are common abiotic stresses. In this study, two winter wheat “Xindong20” and “Xindong23” were solution cultured and then treated with drought stress under conventional phosphorus level (CP: 1.0 mmol/L) and low phosphorus level (LP: 0.05 mmol /L), respectively. The results showed that with the increase of drought stress, the LP application was more conducive to the growth of root tips, length, forks, surfarea and root vitality of wheat. Under the LP treatment, the total phosphorus content of root at rewatered 3d was increased by 94.2% in Xindong20 wheat and decreased by 48.9% in Xindong23 wheat, compared with their respective samples at drought 0d. The LP treatment increased the percentage content of K and decreased the P and Ca percentage content. However, under CP treatment, the percentage content of Zn after rewatered 3 days were increased, compared with drought 7d. Based on the GeneChip analysis of root samples from drought 7d, the microarray results showed that 4577 and 202 differentially expressed genes were detected from Xindong20 and Xindong23, respectively. Among them, 89.9% of differentially expressed genes were involved in organelles and vesicles in Xindong20, and 69.8% were involved in genes encoding root anatomical structure, respiratory chain, electron transport chain, ion transport and enzyme activity in Xindong23. Therefore, the supply of low phosphorus has more effects on the drought tolerance of wheat, and the wheat with different drought tolerance has different regulatory genes. The higher drought-tolerant wheat has more genes up-regulation in response to drought stress.

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Calcium signaling during salt stress and in the regulation of ion homeostasis

Cited by 223 publications

References 119 publications

Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

Salinity Stress-Mediated Suppression of Expression of Salt Overly Sensitive Signaling Pathway Genes Suggests Negative Regulation by AtbZIP62 Transcription Factor in Arabidopsis thaliana

Comparative analysis of combined phosphorus and drought stress-responses in two winter wheat

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