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Title: Phenolic substances and cyanogenesis in galled and non-galled tissue of the fern species Microgramma vacciniifolia
Authors: Santos, M G
Tietbohl, L A C
Oliveira, B H G
Esteve, R 
Campos, M. G. 
Rocha, L. A. 
Issue Date: 2021
Project: CNPq Proc. 308045/2017-3 
FAPERJ Proc. E-26/203.236/2017 
PROCIENCIA of UERJ (Universidade do Estado do Rio de Janeiro) 
Serial title, monograph or event: Brazilian Journal of Biology
Volume: 82
Abstract: Galls, neo-formed plant structures that can occur in different organs, are generated by species-specific interaction with an inducing organism. Inducers manipulate the metabolism of its host. Microgramma vacciniifolia (Langsd. & Fisch.) Copel. is a Neotropical epiphytic fern that hosted two stem galls, one induced by a midge species (Diptera) and other by a micromoth species (Lepidoptera). The aim of this study was to evaluate the impact of these two gall-inducing insects on the biochemistry of phenolic acids and the cyanogenesis in galls, stems and leaves of M. vacciniifolia. High performance liquid chromatography (HPLC) indicated a total of 14 phenol derivatives, including caffeic and coumaric acid. Principal Coordinates Analysis (PCoA) of the phenolic substances indicated three groups consisting (1) non-galled stems and micromoth-induced galls; (2) midge-induced galls; (3) midge-induced galls with parasitoids. Regarding the frequency of cyanogenesis assessed by the picrate paper test, the chi-squared test showed significant difference between fertile leaves (8.3%), sterile leaves (27.7%), non-galled stems (0%) and galls. Among galls, only the midge-induced galls analyzed were cyanogenic (15%). Our results indicated that the different gall-inducers (midge and micromoth) promote species-specific alterations to the phenolic substance composition of the host fern.
ISSN: 1678-4375
DOI: 10.1590/1519-6984.236151
Rights: openAccess
Appears in Collections:FFUC- Artigos em Revistas Internacionais

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