The role of the OsCam1-1 salt stress sensor in ABA accumulation and salt tolerance in rice

2012 ◽  
Vol 55 (3) ◽  
pp. 198-208 ◽  
Author(s):  
Sukhumaporn Saeng-ngam ◽  
Warintra Takpirom ◽  
Teerapong Buaboocha ◽  
Supachitra Chadchawan
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Sensor

scholarly journals Exogenous Melatonin Improves Salt Tolerance by Mitigating Osmotic, Ion, and Oxidative Stresses in Maize Seedlings

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 663 ◽  
Author(s):  
Jianhong Ren ◽  
Jun Ye ◽  
Lina Yin ◽  
Gouxia Li ◽  
Xiping Deng ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Antioxidant Activities ◽  
Term Treatment ◽  
Plant Tolerance ◽  
Short Term Treatment ◽  
Exogenous Melatonin ◽  
Positive Effects ◽  
Oxidative Stresses

Melatonin has been confirmed extensively for the positive effects on increasing plant tolerance to various abiotic stresses. However, the roles of melatonin in mediating different stresses still need to be explored in different plants species and growth periods. To investigate the role of melatonin in mitigating salt stress, maize (Zea mays L.) seedlings growing in hydroponic solution were treated with 100 mM NaCl combined with or without 1 μM melatonin. Melatonin application had no effects on maize growth under normal condition, while it moderately alleviated the NaCl-induced inhibition of plant growth. The leaf area, biomass, and photosynthesis of melatonin-treated plants were higher than that of without melatonin under NaCl treatment. The osmotic potential was lower, and the osmolyte contents (including sucrose and fructose) were higher in melatonin-treated plants. Meanwhile, the decreases in Na+ content and increases in K+/Na+ ratio were found in shoots of melatonin-applied plant under salt stress. Moreover, both enzymatic and nonenzymatic antioxidant activities were significantly increased in leaves with melatonin application under salt treatment. These results clearly indicate that the exogenous melatonin-enhanced salt tolerance under short-term treatment could be ascribed to three aspects, including osmotic adjustment, ion balance, and alleviation of salt-induced oxidative stress.

scholarly journals Melatonin Improves Cotton Salt Tolerance by Regulating ROS Scavenging System and Ca2 + Signal Transduction

2021 ◽  
Vol 12 ◽  
Author(s):  
Yuexin Zhang ◽  
Yapeng Fan ◽  
Cun Rui ◽  
Hong Zhang ◽  
Nan Xu ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Signal Molecules ◽  
Protective Mechanism ◽  
Rna Seq ◽  
Ros Scavenging ◽  
Exogenous Melatonin ◽  
Endogenous Melatonin

As one of the cash crops, cotton is facing the threat of abiotic stress during its growth and development. It has been reported that melatonin is involved in plant defense against salt stress, but whether melatonin can improve cotton salt tolerance and its molecular mechanism remain unclear. We investigated the role of melatonin in cotton salt tolerance by silencing melatonin synthesis gene and exogenous melatonin application in upland cotton. In this study, applicating of melatonin can improve salt tolerance of cotton seedlings. The content of endogenous melatonin was different in cotton varieties with different salt tolerance. The inhibition of melatonin biosynthesis related genes and endogenous melatonin content in cotton resulted in the decrease of antioxidant enzyme activity, Ca2+ content and salt tolerance of cotton. To explore the protective mechanism of exogenous melatonin against salt stress by RNA-seq analysis. Melatonin played an important role in the resistance of cotton to salt stress, improved the salt tolerance of cotton by regulating antioxidant enzymes, transcription factors, plant hormones, signal molecules and Ca2+ signal transduction. This study proposed a regulatory network for melatonin to regulate cotton’s response to salt stress, which provided a theoretical basis for improving cotton’s salt tolerance.

scholarly journals Overexpression of Peroxidase Gene GsPRX9 Confers Salt Tolerance in Soybean

2019 ◽  
Vol 20 (15) ◽  
pp. 3745 ◽  
Author(s):  
Ting Jin ◽  
Yangyang Sun ◽  
Ranran Zhao ◽  
Zhong Shan ◽  
Junyi Gai ◽  
...  
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Glycine Soja ◽  
Primary Root ◽  
Wild Soybean ◽  
Plant Tolerance ◽  
Salt Tolerant ◽  
Fresh Weight ◽  
Peroxidase Gene

Peroxidases play prominent roles in antioxidant responses and stress tolerance in plants; however, their functions in soybean tolerance to salt stress remain unclear. Here, we investigated the role of a peroxidase gene from the wild soybean (Glycine soja), GsPRX9, in soybean tolerance to salt stress. GsPRX9 gene expression was induced by salt treatment in the roots of both salt-tolerant and -sensitive soybean varieties, and its relative expression level in the roots of salt-tolerant soybean varieties showed a significantly higher increase than in salt-sensitive varieties after NaCl treatment, suggesting its possible role in soybean response to salt stress. GsPRX9-overexpressing yeast (strains of INVSc1 and G19) grew better than the control under salt and H2O2 stress, and GsPRX9-overexpressing soybean composite plants showed higher shoot fresh weight and leaf relative water content than control plants after NaCl treatment. Moreover, the GsPRX9-overexpressing soybean hairy roots had higher root fresh weight, primary root length, activities of peroxidase and superoxide dismutase, and glutathione level, but lower H2O2 content than those in control roots under salt stress. These findings suggest that the overexpression of the GsPRX9 gene enhanced the salt tolerance and antioxidant response in soybean. This study would provide new insights into the role of peroxidase in plant tolerance to salt stress.

The role of the bifunctional enzyme, fructose-6-phosphate-2-kinase/fructose-2,6-bisphosphatase, in carbon partitioning during salt stress and salt tolerance in Rice (Oryza sativa L.)

Plant Science ◽  
2009 ◽  
Vol 176 (3) ◽  
pp. 334-341 ◽  
Author(s):  
Thanikarn Udomchalothorn ◽  
Somporn Maneeprasobsuk ◽  
Eakaphan Bangyeekhun ◽  
Preeda Boon-Long ◽  
Supachitra Chadchawan
Keyword(s):  
Oryza Sativa ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Oryza Sativa L ◽  
Carbon Partitioning ◽  
Bifunctional Enzyme

scholarly journals Anatomical Modifications in two Juncus Species under Salt Stress Conditions

2015 ◽  
Vol 43 (2) ◽  
pp. 501-506
Author(s):  
Mohamad Al HASSAN ◽  
Gholamreza GOHARI ◽  
Monica BOSCAIU ◽  
Oscar VICENTE ◽  
Marius N. GRIGORE
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Responses ◽  
Stress Conditions ◽  
Anatomic Structure ◽  
Anatomical Structures ◽  
Efficient Mechanism ◽  
Damage Indicators ◽  
As Stress

The anatomic structure of roots and culms of two Juncus species with different degrees of salt tolerance was analysed in plants grown for two months under salt stress (NaCl treatments) and in control, non-treated plants. The aim of the study was not only to compare the anatomical structures of a halophyte (J. acutus) and a related glycophyte (J. articulatus), but mostly to assess whether salt stress induced anatomical modifications, by identifying differences between control and treated plants. Several slight differences have been indeed detected, in terms of endodermis type, development of aerenchyma and extent of sclerenchyma in perivascular sheaths. The role of Casparian endodermis was here discussed in relation to its complex implications in controlling salt influx at the root level that is an efficient mechanism involved in halophytes. Aerenchyma is a common feature found in marshy halophytes, allowing them to survive naturally under flooding conditions; however, when occurring in non-waterlogged plants, as is the case of this study, it should be regarded as a genetically, constitutive adaptation rather than an inducible one. Nevertheless, such anatomic modifications should be regarded as mere alterations due to stress – that is, as stress responses – and not as truly adaptations to salinity. In this context, the nature of these modifications – either considered as adaptations or damage indicators of salt stress – should be further reconsidered.

Exogenous ABA induces salt tolerance in indica rice (Oryza sativa L.): The role of OsP5CS1 and OsP5CR gene expression during salt stress

2013 ◽  
Vol 86 ◽  
pp. 94-105 ◽  
Author(s):  
Siriporn Sripinyowanich ◽  
Pongsathorn Klomsakul ◽  
Bongkoj Boonburapong ◽  
Thapana Bangyeekhun ◽  
Tadao Asami ◽  
...  
Keyword(s):  
Gene Expression ◽  
Oryza Sativa ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Oryza Sativa L ◽  
Indica Rice ◽  
Exogenous Aba

scholarly journals Quantification and Fatty Acid Profiles of Sulfolipids in Two Halophytes and a Glycophyte Grown under Different Salt Concentrations

2004 ◽  
Vol 59 (11-12) ◽  
pp. 835-842 ◽  
Author(s):  
Balasubramanian Ramani ◽  
Holger Zorn ◽  
Jutta Papenbrock
Keyword(s):  
Arabidopsis Thaliana ◽  
Salt Stress ◽  
Fatty Acid ◽  
Salt Tolerance ◽  
Fatty Acid Profile ◽  
Fatty Acid Profiles ◽  
Sesuvium Portulacastrum ◽  
Tolerance Mechanisms ◽  
Aster Tripolium

This study was aimed at understanding the role of sulfolipids in salt tolerance mechanisms of the halophytes Aster tripolium L., Compositae, and Sesuvium portulacastrum L., Aizoaceae, and of the glycophyte Arabidopsis thaliana (L.) Heynh., Brassicaceae. In Aster and Sesuvium the sulfolipid contents increased significantly under salt stress conditions (517 mᴍ or 864 mᴍ). In Arabidopsis, changes in sulfolipid contents were not observed (NaCl up to 100 mᴍ). The fatty acid profile of sulfoquinovosyldiacylglycerol (SQDG) in Aster was modified with increasing NaCl concentrations. LC-MS analyses of sulfolipids from Aster and Sesuvium revealed the presence of 18:3/18:3 and 16:0/18:3 molecules. Obviously, the function of sulfolipids during salt stress differs between halophytic species and between halophytes and glycophytes where sulfolipid accumulation was not observed.

scholarly journals Characterization of interactions between the soybean plasma membrane- intrinsic proteins GmPIP1s and GmPIP2s responding to salt stress

2020 ◽  
Author(s):  
Weicong Qi ◽  
Jia Liu ◽  
Dayong Zhang ◽  
Haiying Lu ◽  
Hongbo Shao ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Vital Role ◽  
Plant Responses ◽  
Plasma Membrane Intrinsic Proteins ◽  
Physiological And Biochemical ◽  
Salt And Osmotic Stress

Abstract Background: Salt tolerance is a key trait in soybean breeding and plant responses to salt stress include physiological and biochemical changes that affect the movement of water across the plasma membrane. In this study, we report the interactions of a set of aquaporins, soybean (Glycine max) plasma membrane-intrinsic proteins (GmPIPs), in response to salt stress. Results: GmPIP1;5 and GmPIP1;6 formed hetero-tetramers with GmPIP2;4, GmPIP2;6, GmPIP2;8, GmPIP2;9, GmPIP2;11, and GmPIP2;13. We detected interactions between GmPIP1;6 and GmPIP1;7, but not between GmPIP1;6 and GmPIP1;5. Furthermore, GmPIP2;9 formed homo-tetramers, and this interaction was strengthened under salt and osmotic stress. Expression analysis indicated complex and unique responses to salt stress depending on the duration of the stress. For example, GmPIP2;8, encoding one of the heteromer-forming PIP proteins, was highly up-regulated under early salt stress.Conclusions: Our study highlights the vital role of hetero- and homo-tetramers, in salt tolerance; and improves understanding of the mechanisms by which soybean aquaporin isoforms respond to abiotic stress.

scholarly journals Gain-of-function mutations of AtNHX1 suppress sos1 salt sensitivity and improve salt tolerance in Arabidopsis

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Isaiah Catalino M. Pabuayon ◽  
Jiafu Jiang ◽  
Hongjia Qian ◽  
Jung-Sung Chung ◽  
Huazhong Shi
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Cellular Level ◽  
Salt Sensitivity ◽  
Yeast Cells ◽  
Cellular Damage ◽  
Loss Of Function ◽  
Cloning And Sequencing ◽  
Gain Of Function

AbstractSoil salinity severely hampers agricultural productivity. Under salt stress, excess Na+ accumulation causes cellular damage and plant growth retardation, and membrane Na+ transporters play central roles in Na+ uptake and exclusion to mitigate these adverse effects. In this study, we performed sos1 suppressor mutant (named sup) screening to uncover potential genetic interactors of SOS1 and additional salt tolerance mechanisms. Map-based cloning and sequencing identified a group of mutants harboring dominant gain-of-function mutations in the vacuolar Na+/H+ antiporter gene AtNHX1. The gain-of-function variants of AtNHX1 showed enhanced transporter activities in yeast cells and increased salt tolerance in Arabidopsis wild type plants. Ion content measurements indicated that at the cellular level, these gain-of-function mutations resulted in increased cellular Na+ accumulation likely due to enhanced vacuolar Na+ sequestration. However, the gain-of-function suppressor mutants showed reduced shoot Na+ but increased root Na+ accumulation under salt stress, indicating a role of AtNHX1 in limiting Na+ translocation from root to shoot. We also identified another group of sos1 suppressors with loss-of-function mutations in the Na+ transporter gene AtHKT1. Loss-of-function mutations in AtHKT1 and gain-of-function mutations in AtNHX1 additively suppressed sos1 salt sensitivity, which indicates that the three transporters, SOS1, AtNHX1 and AtHKT1 function independently but coordinately in controlling Na+ homeostasis and salt tolerance in Arabidopsis. Our findings provide valuable information about the target amino acids in NHX1 for gene editing to improve salt tolerance in crops.

scholarly journals Transcriptomic and metabolomic analysis reveals the role of CoA in the salt tolerance of Zygophyllum spp

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jie Wang ◽  
Xi Jiang ◽  
Chufeng Zhao ◽  
Zhongming Fang ◽  
Peipei Jiao
Keyword(s):  
Salt Stress ◽  
Salt Tolerance ◽  
Metabolomic Analysis ◽  
Kegg Pathways ◽  
Branched Chain Amino Acid ◽  
Significant Difference ◽  
Branched Chain ◽  
Shifting Sand ◽  
Important Medicinal Plant

Abstract Background Zygophyllum is an important medicinal plant, with notable properties such as resistance to salt, alkali, and drought, as well as tolerance of poor soils and shifting sand. However, the response mechanism of Zygophyllum spp. to abiotic stess were rarely studied. Results Here, we aimed to explore the salt-tolerance genes of Zygophyllum plants by transcriptomic and metabolic approaches. We chose Z. brachypterum, Z. obliquum and Z. fabago to screen for salt tolerant and sensitive species. Cytological observation showed that both the stem and leaf of Z. brachypterum were significantly thicker than those of Z. fabago. Then, we treated these three species with different concentrations of NaCl, and found that Z. brachypterum exhibited the highest salt tolerance (ST), while Z. fabago was the most sensitive to salt (SS). With the increase of salt concentration, the CAT, SOD and POD activity, as well as proline and chlorophyll content in SS decreased significantly more than in ST. After salt treatment, the proportion of open stomata in ST decreased significantly more than in SS, although there was no significant difference in stomatal number between the two species. Transcriptomic analysis identified a total of 11 overlapping differentially expressed genes (DEGs) in the leaves and roots of the ST and SS species after salt stress. Two branched-chain-amino-acid aminotransferase (BCAT) genes among the 11 DEGs, which were significantly enriched in pantothenate and CoA biosynthesis, as well as the valine, leucine and isoleucine biosynthesis pathways, were confirmed to be significantly induced by salt stress through qRT-PCR. Furthermore, overlapping differentially abundant metabolites showed that the pantothenate and CoA biosynthesis pathways were significantly enriched after salt stress, which was consistent with the KEGG pathways enriched according to transcriptomics. Conclusions In our study, transcriptomic and metabolomic analysis revealed that BCAT genes may affect the pantothenate and CoA biosynthesis pathway to regulate the salt tolerance of Zygophyllum species, which may constitute a newly identified signaling pathway through which plants respond to salt stress.

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