Regulation of Plant Responses to Salt Stress

Zhao, Shuangshuang; Zhang, Qikun; Liu, Mingyue; Zhou, Huapeng; Ma, Changle; Wang, Pingping

doi:10.3390/ijms22094609

Cited by 414 publications

(220 citation statements)

References 128 publications

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“…As a major abiotic stress, salt can trigger the production of stress-related hormones and initiate endogenous hormone signaling, resulting in plant resistance reactions ( Zhao et al, 2021b ). Ethylene is a stress hormone closely related with salt stress ( Riyazuddin et al, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

OsWAK112, A Wall-Associated Kinase, Negatively Regulates Salt Stress Responses by Inhibiting Ethylene Production

et al. 2021

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The wall-associated kinase (WAK) multigene family plays critical roles in various cellular processes and stress responses in plants, however, whether WAKs are involved in salt tolerance is obscure. Herein, we report the functional characterization of a rice WAK, WAK112, whose expression is suppressed by salt. Overexpression of OsWAK112 in rice and heterologous expression of OsWAK112 in Arabidopsis significantly decreased plant survival under conditions of salt stress, while knocking down the OsWAK112 in rice increased plant survival under salt stress. OsWAK112 is universally expressed in plant and associated with cell wall. Meanwhile, in vitro kinase assays and salt tolerance analyses showed that OsWAK112 possesses kinase activity and that it plays a negative role in the response of plants to salt stress. In addition, OsWAK112 interacts with S-adenosyl-L-methionine synthetase (SAMS) 1/2/3, which catalyzes SAM synthesis from ATP and L-methionine, and promotes OsSAMS1 degradation under salt stress. Furthermore, in OsWAK112-overexpressing plants, there is a decreased SAMS content and a decreased ethylene content under salt stress. These results indicate that OsWAK112 negatively regulates plant salt responses by inhibiting ethylene production, possibly via direct binding with OsSAMS1/2/3.

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Section: Resultsmentioning

confidence: 99%

OsWAK112, A Wall-Associated Kinase, Negatively Regulates Salt Stress Responses by Inhibiting Ethylene Production

et al. 2021

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“…When the ROS concentration exceeds the capacity of the defense mechanisms of cells, secondary stress, termed “oxidative stress” will occur. Excess ROS will cause oxidation of proteins, enzyme inhibition, peroxidation of lipids, damage to nucleic acids, and activation of programmed cell death (PCD) pathways; these changes ultimately lead to the death of the cells ( Mittler, 2002 ; Meriga et al, 2004 ; Zhao et al, 2021 ). Therefore, maintaining ROS at a proper level is necessary for plants to adapt adverse environments.…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Function of Two S1Fa-Like Family Genes From Populus trichocarpa

et al. 2021

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S1Fa-like transcription factors (TFs) are small molecular weight proteins that contain both nuclear localization and DNA binding domains. However, the functions of S1Fa-like TFs are poorly understood. In the present study, we identified the S1Fa-like TFs from the Populus trichocarpa genome, which revealed two S1Fa-like TF genes, PtS1Fa1 and PtS1Fa2. PtS1Fa1 and PtS1Fa2 expression was suppressed by drought and salt stress, and was also significantly altered by ABA, MeJA, or SA treatment. Both PtS1Fa1 and PtS1Fa2 are nuclear proteins. Transgenic P. trichocarpa plants overexpressing PtS1Fa1 and PtS1Fa2, respectively, were generated. The plants overexpressing PtS1Fa2 showed increased fresh weight, chlorophyll content, and root length and weight compared with those in wild-type (WT) P. trichocarpa under drought conditions. Meanwhile, these phenotype traits of plants overexpressing PtS1Fa1 were similar to those of WT plants. Furthermore, overexpression of PtS1Fa2 reduced the malondialdehyde (MDA) content, electrolyte leakage, H2O2 and O2- contents, and increased superoxide dismutase (SOD) and peroxidase (POD) activities. The expression of SOD and POD was also induced by PtS1Fa2. However, overexpression of PtS1Fa1 failed to affect any of these physiological parameters or SOD and POD gene expression. These results suggested that PtS1Fa2 plays a role in drought tolerance, and confers drought tolerance by increase antioxidant activity to reduce reactive oxygen species (ROS) accumulation.

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“…Under NaCl stress Ca 2+ improves absorption of ions across cell membranes, influence the transfer of sugars, and inhibits K + loss. Therefore Ca 2+ is important for the maintenance of K + / Na + balance in plants and is a crucial regulator of growth and development in plants (Chen and Polle 2010;Hepler 2005;Shabala et al 2006;Zhao et al 2021). In poplars after exposure to salt, initially increased Ca 2+ uptake was observed, both in the salt-tolerant species P. euphratica (Chen et al, 2001), and in the salt-sensitive hybrid P. x canescens (Ottow et al 2005;Ma et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Influence of drought and salt stress on the growth of young Populus nigra ‘Italica’ plants and associated mycorrhizal fungi and non-mycorrhizal fungal endophytes

Kulczyk-Skrzeszewska

Kieliszewska-Rokicka

2021

New Forests

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Populus nigra ‘Italica’ (Lombardy poplar) is a breeding cultivar of black poplar, widely used as a street tree or windbreak, often exposed to salinity and limited water availability. Populus roots can develop dual mycorrhizal associations with ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) fungi, and with non-mycorrhizal fungal endophytes (FE). The symbiotic fungi may alleviate the effects of adverse environmental conditions. We investigated the performance (growth and symbiotic associations) of one-year-old Populus nigra ‘Italica’ grown from woody cuttings in soil from natural poplar habitat and subjected to water scarcity and soil salinity (50 mM NaCl, 150 mM NaCl, 250 mM NaCl). With increasing soil salinity, a decrease in the growth parameters of the aboveground parts of the poplar plantlets and their fine roots were found; however, the roots were more resistant to the stress factors analyzed than the shoots. ECMF, AMF, and non-mycorrhizal FE were all tolerant to increased salt levels in the soil, and the ECM abundance was significantly higher under conditions of mild salinity (50 mM NaCl, 150 mM NaCl) compared to the control plants and those treated with 250 mM NaCl. Our results indicated that enhanced soil salinity increased the content of sodium and chlorine in leaves, but did not affect significantly the concentrations potassium, magnesium, calcium, phosphorus, or nitrogen. Significant accumulation of proline in leaves suggest salt stress of P. nigra ‘Italica’ treated with 250 mM NaCl and contribution of proline to the plant defense reactions.

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Regulation of Plant Responses to Salt Stress

Cited by 414 publications

References 128 publications

OsWAK112, A Wall-Associated Kinase, Negatively Regulates Salt Stress Responses by Inhibiting Ethylene Production

OsWAK112, A Wall-Associated Kinase, Negatively Regulates Salt Stress Responses by Inhibiting Ethylene Production

Characterization of the Function of Two S1Fa-Like Family Genes From Populus trichocarpa

Influence of drought and salt stress on the growth of young Populus nigra ‘Italica’ plants and associated mycorrhizal fungi and non-mycorrhizal fungal endophytes

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