Ginkgolide is one of the important secondary metabolites of Ginkgo biloba. The synthesis of plant secondary metabolites is influenced by exogenous phytohormones. In this study, ten-year-old ginkgo grafted seedlings were used as the test material, and the effects of 0, 2, 4, 6, 8, and 10 mmol L–1 gibberellin (GA3) on endogenous indole acetic acid (IAA), abscisic acid (ABA), GA3, and ginkgolide contents in ginkgo leaves were investigated. Results showed that exogenous GA3 treatment inhibited endogenous GA3, changed the contents of endogenous IAA and ABA in ginkgo leaves, and affected the accumulation of secondary metabolite ginkgolides. Among the given concentrations, the 4 mmol L–1 GA3 treatment could remarkably increase ginkgolide content. We found that the best harvesting period of ginkgo leaves were in late August and late September, in which the content of ginkgolides was the highest.
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机译：GinkGolide是银杏叶片的重要次生代谢产物之一。植物次级代谢物的合成受外源植物激素的影响。在这项研究中，使用十岁的银杏植被幼苗作为测试材料，以及0,2,4,6,8和10mmol L-1吉布林蛋白（Ga3）对内源性吲哚乙酸的影响（IAA [Condgo叶片中的脱落酸（ABA），Ga 3和糖醇内容物。结果表明，外源GA3治疗抑制内源性GA3，改变了银杏叶中内源性IAA和ABA的含量，并影响了次生代谢物甘氨酸的积累。在给定的浓度中，4mmol L-1 Ga 3处理可以显着增加甘油苷含量。我们发现，银杏叶的最佳收获时期是8月下旬和9月下旬，其中甘油糖苷的含量最高。
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