How salt stress-responsive proteins regulate plant adaptation to saline conditions

Mansour, Mohamed Magdy F.; Hassan, Fahmy

doi:10.1007/s11103-021-01232-x

Cited by 45 publications

(40 citation statements)

References 299 publications

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“…Plants respond to salinity by adapting diverse strategies such as phytohormonal regulation, redox change in potential, osmolyte biosynthesis, and epigenetic control of stress-related genes during stressful conditions. Similarly, salt stress tolerance is a complex trait that includes various signaling pathways, transcription factors, stress-responsive genes ( Mansour and Hassan, 2022 ). However, tolerance to salinity levels varies between plant species, and such plants can be categorized as halophytes or glycophytes.…”

Section: Introductionmentioning

confidence: 99%

Salt stress resilience in plants mediated through osmolyte accumulation and its crosstalk mechanism with phytohormones

et al. 2022

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Salinity stress is one of the significant abiotic stresses that influence critical metabolic processes in the plant. Salinity stress limits plant growth and development by adversely affecting various physiological and biochemical processes. Enhanced generation of reactive oxygen species (ROS) induced via salinity stress subsequently alters macromolecules such as lipids, proteins, and nucleic acids, and thus constrains crop productivity. Due to which, a decreasing trend in cultivable land and a rising world population raises a question of global food security. In response to salt stress signals, plants adapt defensive mechanisms by orchestrating the synthesis, signaling, and regulation of various osmolytes and phytohormones. Under salinity stress, osmolytes have been investigated to stabilize the osmotic differences between the surrounding of cells and cytosol. They also help in the regulation of protein folding to facilitate protein functioning and stress signaling. Phytohormones play critical roles in eliciting a salinity stress adaptation response in plants. These responses enable the plants to acclimatize to adverse soil conditions. Phytohormones and osmolytes are helpful in minimizing salinity stress-related detrimental effects on plants. These phytohormones modulate the level of osmolytes through alteration in the gene expression pattern of key biosynthetic enzymes and antioxidative enzymes along with their role as signaling molecules. Thus, it becomes vital to understand the roles of these phytohormones on osmolyte accumulation and regulation to conclude the adaptive roles played by plants to avoid salinity stress.

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Section: Introductionmentioning

confidence: 99%

Salt stress resilience in plants mediated through osmolyte accumulation and its crosstalk mechanism with phytohormones

et al. 2022

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“…In plants, salt stress generates osmotic stress and ion cytotoxicity, which impair new shoot growth and enhance the senescence of mature leaves ( Munns and Tester, 2008 ). Many major cellular processes, such as photosynthesis, protein and lipid synthesis, and energy metabolism, are affected by saline soil ( van Zelm et al, 2020 ; Mansour and Hassan, 2022 ), and these effects further impair seed germination, plant growth and development. To cope with salt stress, plants must evolve elaborate systems to integrate complicated signaling networks ( Deinlein et al, 2014 ; Zhu, 2016 ), and these systems perform tasks such as sensing cellular nutrient availability, activating plant stress hormone abscisic acid (ABA), and regulating protein modifications.…”

Section: Introductionmentioning

confidence: 99%

Interference of Arabidopsis N-Acetylglucosamine-1-P Uridylyltransferase Expression Impairs Protein N-Glycosylation and Induces ABA-Mediated Salt Sensitivity During Seed Germination and Early Seedling Development

Chen

Shen²,

Chou³

et al. 2022

Front. Plant Sci.

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N-acetylglucosamine (GlcNAc) is the fundamental amino sugar moiety that is essential for protein glycosylation. UDP-GlcNAc, an active form of GlcNAc, is synthesized through the hexosamine biosynthetic pathway (HBP). Arabidopsis N-acetylglucosamine-1-P uridylyltransferases (GlcNAc1pUTs), encoded by GlcNA.UTs, catalyze the last step in the HBP pathway, but their biochemical and molecular functions are less clear. In this study, the GlcNA.UT1 expression was knocked down by the double-stranded RNA interference (dsRNAi) in the glcna.ut2 null mutant background. The RNAi transgenic plants, which are referred to as iU1, displayed the reduced UDP-GlcNAc biosynthesis, altered protein N-glycosylation and induced an unfolded protein response under salt-stressed conditions. Moreover, the iU1 transgenic plants displayed sterility and salt hypersensitivity, including delay of both seed germination and early seedling establishment, which is associated with the induction of ABA biosynthesis and signaling. These salt hypersensitive phenotypes can be rescued by exogenous fluridone, an inhibitor of ABA biosynthesis, and by introducing an ABA-deficient mutant allele nced3 into iU1 transgenic plants. Transcriptomic analyses further supported the upregulated genes that were involved in ABA biosynthesis and signaling networks, and response to salt stress in iU1 plants. Collectively, these data indicated that GlcNAc1pUTs are essential for UDP-GlcNAc biosynthesis, protein N-glycosylation, fertility, and the response of plants to salt stress through ABA signaling pathways during seed germination and early seedling development.

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“…All the results suggest that Mc HB7 has the same function as At HB7 in Arabidopsis in that both promote chlorophyll levels and photosynthesis in mature plants [ 51 ]. It is worth mentioning that a lot of research has demonstrated that the proteins belonging to the photosynthesis play pivotal roles in the response to salinity [ 10 ]. For example, the increased proteins by salt stress in Atriplex canescens were identified to be involved in photosynthetic electron transport and chlorophyll biosynthesis [ 52 ].…”

Section: Discussionmentioning

confidence: 99%

“…In response to salt stress, many plants also exhibit plasticity by initiating acclimation or adaptation processes to protect themselves from the damage and thus increase their tolerance to high-salinity conditions [ 8 ]. To date, fundamental mechanisms of plant salt response have been explored, such as salt perception and transport, Ca 2+ and ROS waves, salt overly sensitive (SOS) pathway activation, transcriptional regulation, phospholipid modification, protein kinase signaling, ABA signaling, auxin transport, metabolite changes, carbon partitioning, and translocation [ 9 , 10 , 11 ]. In recent years, the molecular mechanisms of salt response have been studied in different species such as Arabidopsis [ 12 ], rice [ 13 ], wheat [ 14 ], and soybean [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Transcription factors (TFs) have been reported to play a crucial role in plant salt stress responses by activating and/or repressing the expression of salt-related genes [ 10 ], e.g., myeloblastosis ( MYB ) [ 17 ], ethylene response factor ( ERF ) [ 18 ], basic leucine zipper ( bZIP ) [ 19 ], NAM , ATAF , and CUC ( NAC ) [ 20 ] and homeodomain associated to a leucine zipper ( HD-ZIP ) [ 21 ]. They are involved in different signaling pathways during salt stress response and are well-studied.…”

Section: Introductionmentioning

confidence: 99%

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Overexpression of McHB7 Transcription Factor from Mesembryanthemum crystallinum Improves Plant Salt Tolerance

Zhang

Tan

Cheng

et al. 2022

IJMS

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Mesembryanthemum crystallinum (common ice plant) is one of the facultative halophyte plants, and it serves as a model for investigating the molecular mechanisms underlying its salt stress response and tolerance. Here we cloned one of the homeobox transcription factor (TF) genes, McHB7, from the ice plant, which has 60% similarity with the Arabidopsis AtHB7. Overexpression of the McHB7 in Arabidopsis (OE) showed that the plants had significantly elevated relative water content (RWC), chlorophyll content, superoxide dismutase (SOD), and peroxidase (POD) activities after salt stress treatment. Our proteomic analysis identified 145 proteins to be significantly changed in abundance, and 66 were exclusively increased in the OE plants compared to the wild type (WT). After salt treatment, 979 and 959 metabolites were significantly increased and decreased, respectively, in the OE plants compared to the WT. The results demonstrate that the McHB7 can improve photosynthesis, increase the leaf chlorophyll content, and affect the TCA cycle by regulating metabolites (e.g., pyruvate) and proteins (e.g., citrate synthase). Moreover, McHB7 modulates the expression of stress-related proteins (e.g., superoxide dismutase, dehydroascorbate reductase, and pyrroline-5-carboxylate synthase B) to scavenge reactive oxygen species and enhance plant salt tolerance.

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How salt stress-responsive proteins regulate plant adaptation to saline conditions

Cited by 45 publications

References 299 publications

Salt stress resilience in plants mediated through osmolyte accumulation and its crosstalk mechanism with phytohormones

Salt stress resilience in plants mediated through osmolyte accumulation and its crosstalk mechanism with phytohormones

Interference of Arabidopsis N-Acetylglucosamine-1-P Uridylyltransferase Expression Impairs Protein N-Glycosylation and Induces ABA-Mediated Salt Sensitivity During Seed Germination and Early Seedling Development

Overexpression of McHB7 Transcription Factor from Mesembryanthemum crystallinum Improves Plant Salt Tolerance

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