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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Heavy Metal Stress and Some Mechanisms of Plant Defense Response
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Osmotic adjustment is a prime drought stress adaptive engine in support of plant production
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Arsenic uptake, toxicity, detoxification, and speciation in plants : physiological, biochemical, and molecular aspects
Ghulam Abbas,Behzad Murtaza,Irshad Bibi,Irshad Bibi,Muhammad Shahid,Nabeel Khan Niazi,Nabeel Khan Niazi,Nabeel Khan Niazi,Muhammad Imran Khan,Muhammad Amjad,Munawar Hussain,Natasha +11 more
TL;DR: This review highlights the importance of the As-induced generation of reactive oxygen species (ROS) as well as their damaging impacts on plants at biochemical, genetic, and molecular levels.
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Proline: a key player in plant abiotic stress tolerance
Gurpreet Kaur,Bavita Asthir +1 more
TL;DR: Proline acts as stress-related signal exhibiting cross tolerance to a range of different stresses and is found to be coupled to several key pathways such as pentose phosphate, tricarboxylic acid, or urea cycles and contributes to, i.e., purine synthesis and the phenylpropanoid pathway.
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Mechanisms of Plant Responses and Adaptation to Soil Salinity.
Chunzhao Zhao,Chunzhao Zhao,Heng Zhang,Chun-Peng Song,Jian-Kang Zhu,Jian-Kang Zhu,Sergey Shabala,Sergey Shabala +7 more
TL;DR: This review provides a comprehensive summary of the mechanisms of salt stress responses in plants, including salt stress-triggered physiological responses, oxidative stress, salt stress sensing and signaling pathways, organellar stress, ion homeostasis, hormonal and gene expression regulation, metabolic changes, as well as salt tolerance mechanisms in halophytes.
References
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Heavy metal‐induced accumulation of free proline in a metal‐tolerant and a nontolerant ecotype of Silene vulgaris
TL;DR: Differential metal-induced proline accumulation in distinctly metal-tolerant ecotypes is a consequence, rather than a cause of differential metal tolerance, of the development of a metal- induced water deficit in the leaves.
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Exogenous proline and glycinebetaine increase NaCl-induced ascorbate–glutathione cycle enzyme activities, and proline improves salt tolerance more than glycinebetaine in tobacco Bright Yellow-2 suspension-cultured cells
Md. Anamul Hoque,Mst. Nasrin Akhter Banu,Eiji Okuma,Katsumi Amako,Yoshimasa Nakamura,Yasuaki Shimoishi,Yoshiyuki Murata +6 more
TL;DR: It is suggested that proline offered greater protection against salt stress than betaine did because proline was more effective in increasing the activity of enzymes involved in the antioxidant system.
Journal ArticleDOI
Proline accumulates in plants exposed to UV radiation and protects them against UV induced peroxidation.
TL;DR: For the first time, it is shown that plants exposed to UV radiations accumulate proline and proline can protect plant cells against UV radiation induced peroxidative processes.
Journal ArticleDOI
Modulation of nitrate reductase activity in rice seedlings under aluminium toxicity and water stress: role of osmolytes as enzyme protectant.
TL;DR: Results suggest that Al toxicity and water stress decrease total amount of functional NR in rice seedlings and the osmolytes proline, glycine betaine and sucrose appear to have a direct protective action on enzyme NR under stressful conditions.
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Salt stress-induced proline transporters and salt stress-repressed broad specificity amino acid permeases identified by suppression of a yeast amino acid permease-targeting mutant
TL;DR: A yeast mutant lacking SHR3, a protein specifically required for correct targeting of plasma membrane amino acid permeases, was used to study the targeting of plant transporters and as a tool to isolate newSHR3-independent amino acid transporators.
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