What is the role of gibberellin (GA) in the regulation of flowering in rubber trees (Hevea brasiliensis)?

Label:chem

Topic
Gibberellin (GA) is a crucial plant hormone involved in various developmental processes, including seed germination, stem elongation, leaf development, floral transition, and flower development. In rubber trees (Hevea brasiliensis), prolonged flowering leads to nutrient depletion, resulting in reduced latex yield and quality. Understanding the role of GA in regulating flowering can provide insights into improving rubber production.
Answer
Gibberellin (GA) regulates flowering in rubber trees by modulating the expression of key genes involved in the GA signaling pathway and flowering regulation. Exogenous application of GA3 and the GA biosynthesis inhibitor chlormequat chloride (CCC) both inhibit flowering and reduce nutrient accumulation in inflorescences and leaves. Transcriptomic analysis revealed that GA3 and CCC treatments affect the expression of genes related to GA signal transduction, flowering regulation, and natural rubber biosynthesis. The findings suggest that GA signaling plays a critical role in inhibiting flowering in rubber trees, potentially offering a method to enhance latex production by reducing flowering events.
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