Participation of Proline in Plant Adaptation to Stress Factors and Its Application in Agrobiotechnology (Review)

Tarchevsky, I. A.; Egorova, A. M.

doi:10.1134/s0003683822040160

Cited by 7 publications

(2 citation statements)

References 177 publications

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“…The amino acid proline is known to contribute to the adjustment of the osmotic equilibrium at the seed membranes, protecting them as well as proteins against dehydration. For this reason, proline tends to accumulate in plants of different species grown under drought and salinity stresses, 54 , 63 – 65 , 83 an effect that coincides with the tendencies reported in Figures 2 and 6 for barley plants evolved from control seeds. In line with these previous works, we assume that the increase in proline in barley plants is a mitigation factor of drought/salinity stresses.…”

Section: Discussionsupporting

confidence: 80%

Germination and First Stages of Growth in Drought, Salinity, and Cold Stress Conditions of Plasma-Treated Barley Seeds

Perea-Brenes,

Garcia,

Cantos

et al. 2023

ACS Agric. Sci. Technol.

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Numerous works have demonstrated that cold plasma treatments constitute an effective procedure to accelerate seed germination under nonstress conditions. Evidence also exists about a positive effect of plasmas for germination under environmental stress conditions. For barley seeds, this work studies the influence of cold plasma treatments on the germination rate and initial stages of plant growth in common stress environments, such as drought, salinity, and low-temperature conditions. As a general result, it has been found that the germination rate was higher for plasma-treated than for untreated seeds. Plasma also induced favorable changes in plant and radicle dimensions, which depended on the environment. The obtained results demonstrate that plasma affects the biochemical metabolic chains of seeds and plants, resulting in changes in the concentration of biochemical growing factors, a faster germination, and an initially more robust plant growth, even under stress conditions. These changes in phenotype are accompanied by differences in the concentration of biomarkers such as photosynthetic pigments (chlorophylls a and b and carotenoids), reactive oxygen species, and, particularly, the amino acid proline in the leaves of young plants, with changes that depend on environmental conditions and the application of a plasma treatment. This supports the idea that, rather than an increase in seed water imbibition capacity, there are clear beneficial effects on seedling of plasma treatments.

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Section: Discussionsupporting

confidence: 80%

Germination and First Stages of Growth in Drought, Salinity, and Cold Stress Conditions of Plasma-Treated Barley Seeds

Perea-Brenes,

Garcia,

Cantos

et al. 2023

ACS Agric. Sci. Technol.

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“…Proline accumulated during a stress episode is degraded to provide a supply of energy to drive growth once the stress is relieved. Proline homeostasis is critical for active cell division and sustainable growth under long-term stress [ 19 , 45 ]. In this study, proline treatment increased the proline content of alfalfa leaves under normal or salt stress conditions ( Table 3 ).…”

Section: Discussionmentioning

confidence: 99%

Exogenous Proline Improves Salt Tolerance of Alfalfa through Modulation of Antioxidant Capacity, Ion Homeostasis, and Proline Metabolism

Guo

Cai

et al. 2022

Plants

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Alfalfa (Medicago sativa L.) is an important forage crop, and its productivity is severely affected by salt stress. Although proline is a compatible osmolyte that plays an important role in regulating plant abiotic stress resistance, the basic mechanism of proline requires further clarification regarding the effect of proline in mitigating the harmful effects of salinity. Here, we investigate the protective effects and regulatory mechanisms of proline on salt tolerance of alfalfa. The results show that exogenous proline obviously promotes seed germination and seedling growth of salt-stressed alfalfa. Salt stress results in stunted plant growth, while proline application alleviates this phenomenon by increasing photosynthetic capacity and antioxidant enzyme activities and decreasing cell membrane damage and reactive oxygen species (ROS) accumulation. Plants with proline treatment maintain a better K+/Na+ ratio by reducing Na+ accumulation and increasing K+ content under salt stress. Additionally, proline induces the expression of genes related to antioxidant biosynthesis (Cu/Zn-SOD and APX) and ion homeostasis (SOS1, HKT1, and NHX1) under salt stress conditions. Proline metabolism is mainly regulated by ornithine-δ-aminotransferase (OAT) and proline dehydrogenase (ProDH) activities and their transcription levels, with the proline-treated plants displaying an increase in proline content under salt stress. In addition, OAT activity in the ornithine (Orn) pathway rather than Δ1-pyrroline-5-carboxylate synthetase (P5CS) activity in the glutamate (Glu) pathway is strongly increased under salt stress, made evident by the sharp increase in the expression level of the OAT gene compared to P5CS1 and P5CS2. Our study provides new insight into how exogenous proline improves salt tolerance in plants and that it might be used as a significant practical strategy for cultivating salt-tolerant alfalfa.

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Germination strategies of stress-resistant Aspergillus conidia

Ijadpanahsaravi,

Wösten

2024

Current Opinion in Food Science

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Participation of Proline in Plant Adaptation to Stress Factors and Its Application in Agrobiotechnology (Review)

Cited by 7 publications

References 177 publications

Germination and First Stages of Growth in Drought, Salinity, and Cold Stress Conditions of Plasma-Treated Barley Seeds

Germination and First Stages of Growth in Drought, Salinity, and Cold Stress Conditions of Plasma-Treated Barley Seeds

Exogenous Proline Improves Salt Tolerance of Alfalfa through Modulation of Antioxidant Capacity, Ion Homeostasis, and Proline Metabolism

Germination strategies of stress-resistant Aspergillus conidia

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