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
TL;DR: An important additive component of plant defense system is symbiotic association with arbuscular mycorrhizal (AM) fungi, which can effectively immobilize HMs and reduce their uptake by host plants via binding metal ions to hyphal cell wall and excreting several extracellular biomolecules.
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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
Regulation of proline accumulation in detached rice leaves exposed to excess copper
TL;DR: Proline accumulation induced by excess Cu was related to proteolysis and an increase in Delta(1)-pyrroline-5-carboxylate reductase or ornithine-delta-aminotransferase activity and could not be explained by proline utilization or stress-induced modifications in proline dehydrogenase.
Journal ArticleDOI
Role of proline-linked pentose phosphate pathway in biosynthesis of plant phenolics for functional food and environmental applications: a review
TL;DR: A model has been proposed in which the proline-linked pentose phosphate pathway is critical for modulating protective antioxidant response pathways in diverse biological systems, including humans, and provides a mechanism for understanding the mode of action of phenolic phytochemicals in modulating antioxidant pathways in relation to human health.
Journal ArticleDOI
Analysis of limitations to CO2 assimilation on exposure of leaves of two Brassica napus cultivars to UV‐B
TL;DR: It is concluded that loss of Rubisco is a primary factor in UV-B inhibition of CO 2 assimilation and the maximum quantum efficiency of photosystem II (PSII) photochemistry is estimated.
Journal ArticleDOI
Involvement of proline in protecting thylakoid membranes against free radical-induced photodamage
TL;DR: It is demonstrated that proline is involved in reducing the photodamage in the thylakoid membranes by scavenging and/or reducing the production of 1O2.
Journal ArticleDOI
A reassessment of the function of the so-called compatible solutes in the halophytic plumbaginaceae Limonium latifolium.
David Gagneul,Abdelkader Aïnouche,Claire Duhazé,Raphaël Lugan,François Larher,Alain Bouchereau +5 more
TL;DR: The compatible solute hypothesis as mentioned in this paper posits that maintaining osmotic equilibrium under conditions of high salinity requires synthesis of organic compounds, uptake of potassium ions, and partial exclusion of NaCl.
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