Anthocyanins: biotechnological targets for enhancing crop tolerance to salinity stress
Mansour, Mohamed Magdy F.;
Abstract
Salinity is a major abiotic stress factor affecting crop plants’ growth, development, and yield in many areas of the
world, which may greatly influence the world’s food security in the future. It is therefore a must to understand
and unmask the crop salinity tolerance mechanisms to find biomarkers that can be utilized in developing crop
species resistant to high salinity. Anthocyanins are a class of secondary metabolites that are produced as one of
the final products of the flavonoid pathway. Anthocyanins have been shown to accumulate in tolerant species/
genotypes under saline conditions providing important roles under stress. Anthocyanin accumulation under
salinity stress is hence correlated with plant salinity tolerance, and anthocyanin synthesis downregulation at least
in part has boosted the accumulation of ROS and increased the plant sensitivity to stress. In addition, evidence
indicates anthocyanins have many human health benefits, pointing out the high demand for anthocyanins.
Further, elevated anthocyanin production under high salinity has been shown to be related to increased
expression of anthocyanin biosynthesis and regulatory genes, suggesting these genes may be candidates for the
improvement of anthocyanin accumulation and crop salinity tolerance. Genetic and nongenetic approaches have
successfully improved anthocyanin accumulation and promoted crop tolerance to high salinity. In this review, we
provide a comprehensive view of the state-of-the-art literature on anthocyanins, discussing recent evidence
related to anthocyanin accumulation and its roles in crop salinity tolerance, as well as anthocyanin synthesis,
regulation, transport, and genetic manipulation. Strategies for enhancing anthocyanin levels under saline stress
are also pointed out. It is noteworthy that the development of anthocyanin-enriched crops will not only enhance
the salinity tolerance and productivity of horticultural and agronomic crops but also will increase valuable
natural bioactive compounds that provide several critical health benefits for humans.
world, which may greatly influence the world’s food security in the future. It is therefore a must to understand
and unmask the crop salinity tolerance mechanisms to find biomarkers that can be utilized in developing crop
species resistant to high salinity. Anthocyanins are a class of secondary metabolites that are produced as one of
the final products of the flavonoid pathway. Anthocyanins have been shown to accumulate in tolerant species/
genotypes under saline conditions providing important roles under stress. Anthocyanin accumulation under
salinity stress is hence correlated with plant salinity tolerance, and anthocyanin synthesis downregulation at least
in part has boosted the accumulation of ROS and increased the plant sensitivity to stress. In addition, evidence
indicates anthocyanins have many human health benefits, pointing out the high demand for anthocyanins.
Further, elevated anthocyanin production under high salinity has been shown to be related to increased
expression of anthocyanin biosynthesis and regulatory genes, suggesting these genes may be candidates for the
improvement of anthocyanin accumulation and crop salinity tolerance. Genetic and nongenetic approaches have
successfully improved anthocyanin accumulation and promoted crop tolerance to high salinity. In this review, we
provide a comprehensive view of the state-of-the-art literature on anthocyanins, discussing recent evidence
related to anthocyanin accumulation and its roles in crop salinity tolerance, as well as anthocyanin synthesis,
regulation, transport, and genetic manipulation. Strategies for enhancing anthocyanin levels under saline stress
are also pointed out. It is noteworthy that the development of anthocyanin-enriched crops will not only enhance
the salinity tolerance and productivity of horticultural and agronomic crops but also will increase valuable
natural bioactive compounds that provide several critical health benefits for humans.
Other data
Title | Anthocyanins: biotechnological targets for enhancing crop tolerance to salinity stress | Authors | Mansour, Mohamed Magdy F. | Issue Date | Sep-2023 | Journal | Scientia Horticulturae | Volume | 319 | DOI | https://doi.org/10.1016/j.scienta.2023.112182 |
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