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.
Journal ArticleDOI
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.
Journal ArticleDOI
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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Free radical scavenging potential of L-proline: evidence from in vitro assays.
TL;DR: It is implied by extension that free proline, known to accumulate in plant tissues during abiotic stresses, would contribute to scavenging of surplus free radicals produced under a variety of abiotic pressures.
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Proline and glycine betaine influence protein solvation.
TL;DR: The results are consistent with the proposition that a protein-containing system in which high concentrations of proline and/or betaine are present, is better protected against the biologically unfavorable consequences of dehydration-induced thermodynamic perturbation.
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Isolation of the Ornithine-δ-Aminotransferase cDNA and Effect of Salt Stress on Its Expression in Arabidopsis thaliana
TL;DR: The results suggest that for A. thaliana, the Orn pathway, together with the glutamate pathway, plays an important role in Pro accumulation during osmotic stress.
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A nuclear gene encoding mitochondrial Delta-pyrroline-5-carboxylate dehydrogenase and its potential role in protection from proline toxicity.
TL;DR: In this article, AtP5CDH was found to play a crucial role in the degradation of Pro catabolism intermediate P5C, and AtProDH was shown to be a single-copy gene localized to the mitochondria.
Journal ArticleDOI
Osmoregulation of a Pyrroline-5-Carboxylate Reductase Gene in Arabidopsis thaliana
TL;DR: Under normal growth conditions, the P5C reductase mRNA level was significantly higher in roots and ripening seeds than in green tissue, suggesting osmoregulation of the AT-P5C1 promoter region, and a time-course experiment indicated that this induction precedes proline accumulation.
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