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
TL;DR: Over all crops a positive and significant association between OA and yield under drought stress were found in 24 out of 26 cases, considering that it is generally difficult to find a singular plant trait responsible for yield advantage of numerous crops under different drought stress conditions, this evidence is no less than remarkable as proof that OA sustains crop yieldunder drought stress.
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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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Journal ArticleDOI
Protection of plasma membrane of onion epidermal cells by glycinebetaine and proline against NaCl stress
TL;DR: It is evident that cell membrane protection under salinity stress can be provided by GB or Pro thus leading to increased salt tolerance in plants.
Journal ArticleDOI
LeProT1, a Transporter for Proline, Glycine Betaine, and γ-Amino Butyric Acid in Tomato Pollen
Rainer Schwacke,Silke Grallath,Kevin E. Breitkreuz,Kevin E. Breitkreuz,Elke Stransky,Harald Stransky,Wolf B. Frommer,Doris Rentsch +7 more
TL;DR: Direct uptake and competition studies demonstrate that LeProT1 constitutes a general transporter for compatible solutes, specifically expressed both in mature and germinating pollen, as demonstrated by RNA in situ hybridization.
Journal ArticleDOI
Removal of Feedback Inhibition of Δ1-Pyrroline-5-carboxylate Synthetase, a Bifunctional Enzyme Catalyzing the First Two Steps of Proline Biosynthesis in Plants
TL;DR: A single substitution of an alanine for a phenylalanine at amino acid residue 129 of the P5CS resulted in a significant reduction of pro line feedback inhibition, which may allow genetic manipulation of proline biosynthesis and overproduction of prolines in plants for conferring water stress tolerance.
Journal ArticleDOI
Heavy‐metal‐induced proline accumulation and its role in ameliorating metal toxicity in Chlorella vulgaris
S.K. Mehta,J.P. Gaur +1 more
TL;DR: A protective effect of proline on metal toxicity through inhibition of lipid peroxidation is shown, which was triggered within a few hours of metal treatment.
Journal Article
Water relations, gas exchange and amino acid content in Cd-treated lettuce
G. Costa,Jean-Louis Morel +1 more
TL;DR: Water relations, gas exchange and amino acid contents in Lactuca sativa (L.) cv. Reine de Mai were studied at variable cadmium concentrations (0, 0.1, 1, 100 μM) using axenic hydroponic culture as mentioned in this paper.
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