ArticleBMC plant biology2026
Synergistic photoregulation of abscisic acid and gibberellin enhances embryogenic callus induction and proliferation in Indica rice.
Article in BMC plant biology, 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
backgroundEfficient embryogenic callus induction remains a major constraint in the genetic transformation of Indica rice. Although light is known to promote callus formation, its underlying phytohormonal regulation is not well understood. In this study, mature embryos of Indica rice 'T98B' were cultured under a 12 h light-dark cycle (light) or continuous darkness (dark).
resultsCallus induction occurred more rapidly under light. The ABA levels under light were 92.1% and 59.7% higher on 5 and 7 days of induction, and 62.2% higher on day 7 of subculture compared with dark. GA
conclusionsOverall, light sequentially activates ABA signaling, which may be associated with embryogenic callus initiation, and then enhances GA biosynthesis, which may regulate sustained proliferation, providing a hormone-based strategy to boost Indica rice transformation efficiency.
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