Unlocking nature's stress buster: Abscisic acid's crucial role in defending plants against abiotic stress

Rai, Gyanendra Kumar; Khanday, Danish Mushtaq; Choudhary, Sadiya M.; Kumar, Pradeep; Kumari, Shanti; Martínez-Andújar, Cristina; Martínez-Melgarejo, Purificacion A.; Rai, Pradeep K.; Pérez-Alfocea, Francisco

doi:10.1016/j.stress.2024.100359

Cited by 7 publications

(1 citation statement)

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“…With global warming and desertification becoming problems due to climate variation, drought-resistant traits are required for the stable production of FF. Plants have unique ways of responding to various external environmental stresses; among them, the plant hormone abscisic acid (ABA) plays a role in plant dormancy and drought response [ 6 ]. Studies on the drought response of ABA have been conducted in a variety of plants.…”

Section: Introductionmentioning

confidence: 99%

Effects of Drought Stress on Abscisic Acid Content and Its Related Transcripts in Allium fistulosum—A. cepa Monosomic Addition Lines

Nakajima,

Yaguchi,

Hirata

et al. 2024

Genes

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Climate change has resulted in an increased demand for Japanese bunching onions (Allium fistulosum L., genomes FF) with drought resistance. A complete set of alien monosomic addition lines of A. fistulosum with extra chromosomes from shallot (A. cepa L. Aggregatum group, AA), represented as FF + 1A–FF + 8A, displays a variety of phenotypes that significantly differ from those of the recipient species. In this study, we investigated the impact of drought stress on abscisic acid (ABA) and its precursor, β-carotene, utilizing this complete set. In addition, we analyzed the expression levels of genes related to ABA biosynthesis, catabolism, and drought stress signal transduction in FF + 1A and FF + 6A, which show characteristic variations in ABA accumulation. A number of unigenes related to ABA were selected through a database using Allium TDB. Under drought conditions, FF + 1A exhibited significantly higher ABA and β-carotene content compared with FF. Additionally, the expression levels of all ABA-related genes in FF + 1A were higher than those in FF. These results indicate that the addition of chromosome 1A from shallot caused the high expression of ABA biosynthesis genes, leading to increased levels of ABA accumulation. Therefore, it is expected that the introduction of alien genes from the shallot will upwardly modify ABA content, which is directly related to stomatal closure, leading to drought stress tolerance in FF.

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Section: Introductionmentioning

confidence: 99%