scholarly journals Plastid Terminal Oxidase as a Route to Improving Plant Stress Tolerance: Known Knowns and Known Unknowns

2016 ◽  
pp. pcw042 ◽  
Author(s):  
Giles N. Johnson ◽  
Piotr Stepien
Keyword(s):  
Stress Tolerance ◽  
Plant Stress ◽  
Terminal Oxidase ◽  
Plant Stress Tolerance ◽  
Known Unknowns ◽  
Plastid Terminal Oxidase

Emerging Role of Polyamines in Plant Stress Tolerance

2018 ◽  
Vol 19 (11) ◽  
pp. 1114-1123 ◽  
Author(s):  
Anjali Khajuria ◽  
Nandni Sharma ◽  
Renu Bhardwaj ◽  
Puja Ohri
Keyword(s):  
Stress Tolerance ◽  
Plant Stress ◽  
Plant Stress Tolerance

scholarly journals Osmolytes: Proline metabolism in plants as sensors of abiotic stress

2017 ◽  
Vol 9 (4) ◽  
pp. 2079-2092 ◽  
Author(s):  
Ashu Singh ◽  
Manoj Kumar Sharma ◽  
R. S. Sengar
Keyword(s):  
Stress Tolerance ◽  
Large Range ◽  
Plant Stress ◽  
Proline Accumulation ◽  
Metal Chelator ◽  
Low Concentrations ◽  
Plant Stress Tolerance ◽  
Higher Doses ◽  
Research Pattern

Proline accumulation occurs in a large range of plant species in retaliation to the numerous abiotic stresses. An exclusive research pattern suggests there is a pragmatic relation between proline accumulation and plant stress tolerance. In this review, we will discuss the metabolism of proline accumulation and its role in stress tolerance in plants. Pertaining to the literature cited clearly indicates that not only does it acts as an osmolyte, it also plays important roles during stress as a metal chelator and an antioxidative defence molecule. Moreover, when applied exogenously at low concentrations, proline enhanced stress tolerance in plants. However, some reports point out adverse effects of proline when applied at higher doses. Role of proline gene in seed germination, flowering and other developmental programmes; thus creation of transgene overexpressing this gene would provide better and robust plants. In this context this review gives a detailed account of different proline gene over-expressed in all the trans-genic crops so far.

Genomic approaches to plant stress tolerance

2000 ◽  
Vol 3 (2) ◽  
pp. 117-124 ◽  
Author(s):  
John C Cushman ◽  
Hans J Bohnert
Keyword(s):  
Stress Tolerance ◽  
Plant Stress ◽  
Plant Stress Tolerance

Microbes mediated plant stress tolerance in saline agricultural ecosystem

2019 ◽  
Vol 442 (1-2) ◽  
pp. 1-22 ◽  
Author(s):  
Richa Salwan ◽  
Anu Sharma ◽  
Vivek Sharma
Keyword(s):  
Stress Tolerance ◽  
Plant Stress ◽  
Agricultural Ecosystem ◽  
Plant Stress Tolerance

scholarly journals Redox Regulation of Monodehydroascorbate Reductase by Thioredoxin y in Plastids Revealed in the Context of Water Stress

Antioxidants ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 183 ◽  
Author(s):  
Hélène Vanacker ◽  
Marjorie Guichard ◽  
Anne-Sophie Bohrer ◽  
Emmanuelle Issakidis-Bourguet
Keyword(s):  
Stress Tolerance ◽  
Redox State ◽  
Redox Regulation ◽  
Plant Stress ◽  
Monodehydroascorbate Reductase ◽  
Environmental Constraints ◽  
Wild Type ◽  
Response Network ◽  
Antioxidant Metabolites ◽  
Plant Stress Tolerance

Thioredoxins (TRXs) are key players within the complex response network of plants to environmental constraints. Here, the physiological implication of the plastidial y-type TRXs in Arabidopsis drought tolerance was examined. We previously showed that TRXs y1 and y2 have antioxidant functions, and here, the corresponding single and double mutant plants were studied in the context of water deprivation. TRX y mutant plants showed reduced stress tolerance in comparison with wild-type (WT) plants that correlated with an increase in their global protein oxidation levels. Furthermore, at the level of the main antioxidant metabolites, while glutathione pool size and redox state were similarly affected by drought stress in WT and trxy1y2 plants, ascorbate (AsA) became more quickly and strongly oxidized in mutant leaves. Monodehydroascorbate (MDA) is the primary product of AsA oxidation and NAD(P)H-MDA reductase (MDHAR) ensures its reduction. We found that the extractable leaf NADPH-dependent MDHAR activity was strongly activated by TRX y2. Moreover, activity of recombinant plastid Arabidopsis MDHAR isoform (MDHAR6) was specifically increased by reduced TRX y, and not by other plastidial TRXs. Overall, these results reveal a new function for y-type TRXs and highlight their role as major antioxidants in plastids and their importance in plant stress tolerance.

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