Role of proline under changing environments: a review.
TLDR
Review of the literature indicates that a stressful environment results in an overproduction of proline in plants which in turn imparts stress tolerance by maintaining cell turgor or osmotic balance; stabilizing membranes thereby preventing electrolyte leakage; and bringing concentrations of reactive oxygen species within normal ranges, thus preventing oxidative burst in plants.Abstract:
When exposed to stressful conditions, plants accumulate an array of metabolites, particularly amino acids. Amino acids have traditionally been considered as precursors to and constituents of proteins, and play an important role in plant metabolism and development. A large body of data suggests a positive correlation between proline accumulation and plant stress. Proline, an amino acid, plays a highly beneficial role in plants exposed to various stress conditions. Besides acting as an excellent osmolyte, proline plays three major roles during stress, i.e., as a metal chelator, an antioxidative defense molecule and a signaling molecule. Review of the literature indicates that a stressful environment results in an overproduction of proline in plants which in turn imparts stress tolerance by maintaining cell turgor or osmotic balance; stabilizing membranes thereby preventing electrolyte leakage; and bringing concentrations of reactive oxygen species (ROS) within normal ranges, thus preventing oxidative burst ...read more
Citations
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Nitric oxide is involved in the regulation of melatonin-induced antioxidant responses in Catharanthus roseus roots under cadmium stress
TL;DR: Nitric oxide (NO) and melatonin are two biostimulant molecules in plants that not only modulate the growth and development of plants but also confer enhanced tolerance to abiotic stresses.
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Over-Expression of LcPDS, LcZDS, and LcCRTISO, Genes From Wolfberry for Carotenoid Biosynthesis, Enhanced Carotenoid Accumulation, and Salt Tolerance in Tobacco.
TL;DR: This study indicated that LcPDS, LcZDS, and LcCRTISO have the potential to improve carotenoid content and salt tolerance in higher plant breeding.
Journal ArticleDOI
Physiological Changes Associated with Antioxidant Enzymes in Response to Sugarcane Tolerance to Water Deficit and Rehydration
Claudiana Moura dos Santos,Marcelo de Almeida Silva,Giuseppina Pace Pereira Lima,Fernanda Pacheco de Almeida Prado Bortolheiro,Marcela Cristina Brunelli,Lucas Almeida de Holanda,Rodrigo Oliver +6 more
TL;DR: Water deficit increased the levels of proline and the enzymes superoxide dismutase and ascorbate peroxidase in all cultivars, except in the cultivar SP81-3250, which had a reduced content and showed no recovery after rehydration.
Journal ArticleDOI
Understanding physiological and morphological traits contributing to drought tolerance in barley
Md. Hasanuzzaman,Md. Hasanuzzaman,Lana Shabala,Timothy J. Brodribb,Meixue Zhou,Sergey Shabala +5 more
TL;DR: It is suggested that drought‐tolerant genotypes have lower stomatal conductance, and lower water content, Na+, K+ and Cl− contents in their tissue under control conditions than the drought‐sensitive ones, which make them more resilient to the forthcoming drought stress.
Journal ArticleDOI
Role of exogenous signaling molecules in alleviating salt-induced oxidative stress in rice (Oryza sativa L.): a comparative study
Tahjib-Ul-Arif,Sonya Afrin,Mohammed Arif Sadik Polash,Tahmina Akter,Shuma Rani Ray,Md. Tofazzal Hossain,M. Afzal Hossain +6 more
TL;DR: In this paper, the authors explored the potential salinity stress-mitigating effect of different signaling molecules in rice and found that pretreatment with CaCl2 and AsA was relatively more efficient in conferring salinity tolerance of rice as reflected from the significant enhanced germination and growth in the saline medium.
References
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Journal ArticleDOI
Oxidative stress, antioxidants and stress tolerance
TL;DR: Key steps of the signal transduction pathway that senses ROIs in plants have been identified and raise several intriguing questions about the relationships between ROI signaling, ROI stress and the production and scavenging ofROIs in the different cellular compartments.
Journal ArticleDOI
ASCORBATE AND GLUTATHIONE: Keeping Active Oxygen Under Control
Graham Noctor,Christine H. Foyer +1 more
TL;DR: A detailed account of current knowledge of the biosynthesis, compartmentation, and transport of these two important antioxidants, with emphasis on the unique insights and advances gained by molecular exploration are provided.
Journal ArticleDOI
Roles of glycine betaine and proline in improving plant abiotic stress resistance
Muhammad Ashraf,Majid R. Foolad +1 more
TL;DR: In this review article, numerous examples of successful application of these compounds to improve plant stress tolerance are presented and a better understanding of the mechanisms of action of exogenously applied GB and proline is expected to aid their effective utilization in crop production in stress environments.
Journal ArticleDOI
Proline: a multifunctional amino acid
László Szabados,Arnould Savouré +1 more
TL;DR: The compartmentalization of proline biosynthesis, accumulation and degradation in the cytosol, chloroplast and mitochondria is discussed and the role of prolines in cellular homeostasis, including redox balance and energy status, is described.
Journal ArticleDOI
Genes and salt tolerance: bringing them together.
TL;DR: This review lists some candidate genes for salinity tolerance, and draws together hypotheses about the functions of these genes and the specific tissues in which they might operate.
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