ArticlePest management science2026
Photocaged abscisic acid enhances rice salt tolerance via sustained signaling and multilevel stress modulation.
Article in Pest management science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAlthough abscisic acid (ABA) is essential for improving plant tolerance to salt stress, its practical use in agriculture is severely limited by rapid photodegradation, poor lipophilicity, and short-lived activity. Here, three photo-caged ABA derivatives were developed as light-responsive ABA delivery systems and systematically compared with free ABA.
resultsAll three photo-caged ABA derivatives showed sustained bioactivity in seed germination assays of Arabidopsis thaliana and rice, indicating prolonged ABA action. Under salt stress, NV (4,5-dimethoxy-2-nitrobenzyl bromide4)-ABA performed best. Compared with free ABA, NV-ABA enhanced seedling salt tolerance, promoted chlorophyll recovery, and increased shoot and root fresh weights by 36% and 18%. It also better maintained antioxidant homeostasis and moderate ABA signaling. Sustained expression of OsP5CS1, OsP5CR, OsNHX1, and OsRAB16A supported prolonged stress regulation.
conclusionThis study developed a photo-controlled strategy for precise ABA delivery, improving ABA stability and utilization, prolonging bioactivity, and enhancing crop salt tolerance, thus providing a novel approach for ABA application in crop stress regulation. © 2026 Society of Chemical Industry.
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