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- Title
Eliciting increased flavonoids content in Ginkgo biloba leaves through exogenous salicylic acid and methyl jasmonate treatments.
- Authors
Guo, Ying; Feng, Yu; Fu, Fang-Fang; El-Kassaby, Yousry A.; Wang, Tongli; Wang, Guibin
- Abstract
Prior to Ginkgo leaf harvest, we implemented four exogenous applications of salicylic acid (SA: 50, 80, and 100 mg·L−1) or methyl jasmonate (MJ: 20, 40, and 80 mg·L−1) as leaf spray to investigate their effect on flavonoids content and related enzyme activity. Compared with the control, a significant increase of 12% and 26% in flavonoid content was observed 7 days after the first application of 100 mg·L−1 SA and 20 mg·L−1 MJ, respectively; both were determined to be the best treatments. Operationally, administering either elicitor (SA or MJ) 1 week prior to leaf harvest is deemed to be the most practical and economic option. Additionally, enzymes activity involved in flavonoid metabolism (phenylalanine ammonia-lyase, cinnamate 4-hydroxylase, and 4-coumarate:coenzyme A ligase) and antioxidants (peroxidase, superoxide dismutase, and catalase) significantly increased in most SA and MJ treatments. The results strongly support Ginkgo leaf response to SA- or MJ-induced stress through increased nonenzymatic antioxidant compounds (flavonoids) and activity of antioxidant enzymes.
- Subjects
GINKGO; SALICYLIC acid; JASMONATE; FLAVONOIDS; SUPEROXIDE dismutase; PHENYLALANINE; ENZYMES
- Publication
Canadian Journal of Forest Research, 2021, Vol 51, Issue 9, p1339
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/cjfr-2020-0468