Does mechanical damage on soybean induces the production of flavonoids?
Arquivos
Data
2018-10
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ISSN da Revista
Título de Volume
Editor
Anais da Academia Brasileira de Ciências
Resumo
The response of plants to grazing includes the production of chemical defense compounds such as
proteases inhibitors and secondary metabolites as flavonoids, which makes them less palatable to feeding
and negatively affecting the physiology of insects. The aim of this study was to evaluate the phytochemical
response of soybean cultivars (Glycine max (L.) Merrill) resistant (IAC-17, IAC-24) and susceptible
(IAC-P1) to insects after mechanical damage. These cultivars were mechanically injured, and after 24
hours samples of these plants were analyzed by HPLC to identify and quantify flavonoids. The flavonoids
daidzein, quercetin, and rutin were quantified, with the highest concentration of daidzin in soybean cultivars
after mechanical damage. Rutin was biosynthesized by IAC-24. The cultivars IAC-PL1, IAC-17, and IAC-
24 did not show a flavonoid response to mechanical damage. The soybean cultivars are not dependent on
mechanical damage to produce flavonoids.
Descrição
Palavras-chave
Glycine max, Flavonoid, Herbivory, Mechanical damage, Secondary metabolite