Effect of exogenous gibberellin on endogenous hormone and ginkgolide content in Ginkgo leaves

Xian ZHANG; Jun  ZHU; Shuiyuan  CHENG; Wei-Wei ZHANG; Feng  XU; Yongling LIAO

doi:10.15835/nbha48111840

Authors

Xian ZHANG Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
Jun ZHU Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
Shuiyuan CHENG Wuhan Polytechnic University, School of Biology and Pharmaceutical Engineering, Wuhan 430023, Hubei (CN)
Wei-Wei ZHANG Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
Feng XU Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
Yongling LIAO Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)

DOI:

https://doi.org/10.15835/nbha48111840

Keywords:

abscisic acid; gibberellin; Ginkgo biloba; ginkgolide; indole acetic acid

Abstract

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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Author Biography

Wei-Wei ZHANG, Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei

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