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Open AccessJournal ArticleDOI

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 ...

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Journal ArticleDOI

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.
Journal ArticleDOI

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.
Journal ArticleDOI

Proline: a key player in plant abiotic stress tolerance

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.

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

Effects of salt and proline on Medicago sativa callus

TL;DR: The data obtained from experiments indicated that the responses of two Medicago cultivars was genotype dependent and addition of exogenous proline to the culture medium increased the dry weight and free proline content of callus.
Journal Article

Alleviation of drought-induced adverse effects in spring wheat (triticum aestivum l.) using proline as a pre-sowing seed treatment

TL;DR: Exogenous application of proline as a pre-sowing seed treatment improved shoot and root fresh and dry weights, shoot length and grain yield under both non-stress and stress conditions and total leaf area per plant only under stress conditions.
Journal ArticleDOI

Role of proline accumulation in response to toxic copper in chlorella sp. (chlorophyceae) cells

TL;DR: The results of the present study indicate that proline may exert some action on the cell surface and suggest that one function of accumulated proline is to reduce the uptake of metal ions.
Journal ArticleDOI

Proline antioxidant role in the common ice plant subjected to salinity and paraquat treatment inducing oxidative stress

TL;DR: The obtained data suggest that stress-induced accumulation of proline in the common ice plant has both osmoprotectory and antioxidant functions.

Ameliorating effect of foliar applied proline on nutrient uptake in water stressed maize (zea mays l.) plants

TL;DR: Exogenous application of proline counteracted the adverse effects of water stress on nutrient uptake because it promoted the uptake of K + , Ca 2+ , N and P in both maize cultivars.
Related Papers (5)
Trending Questions (2)
Why is proline important for turgur pressure regulation in plant?

Proline is important for turgor pressure regulation in plants as it helps maintain cell turgor or osmotic balance under stressful conditions.

What is the role of proline as a small-molecule metabolite biomarker?

The role of proline as a small-molecule metabolite biomarker is to act as an osmolyte, metal chelator, antioxidative defense molecule, and signaling molecule in plants under stress.