Chemical profiles of Eucalyptus essential oils associated with genotypic resistance to Leptocybe invasa
DOI:
https://doi.org/10.4336/2025.pfb.45e202402320Keywords:
Monoterpenes, Sesquiterpenoids, Forest pestAbstract
Eucalyptus species, essential to Brazil’s forestry and renewable energy sectors, suffer significant losses caused by the gall wasp Leptocybe invasa, which impairs tree growth, productivity, and quality. In response to the need for sustainable strategies, this study investigated the chemical composition of essential oils (EOs) from eleven Eucalyptus genotypes previously classified as resistant or susceptible to the pest, aiming to identify compounds associated with these phenotypes. Using gas chromatography coupled with mass spectrometry (GC/MS), 92 compounds were identified, including monoterpenes and sesquiterpenes, some of which occurred exclusively in resistant or susceptible genotypes. Compounds such as 4-octene and eucalyptol were correlated with resistance and susceptibility, respectively. Although the direct effect of these compounds on L. invasa was not assessed, the results suggest that EO chemical profiles may serve as auxiliary markers in genetic selection programs. This study therefore offers a complementary approach within the framework of forest breeding for pest resistance and recommends future research to confirm the functional relationship between these compounds and plant responses to infestation.
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Copyright (c) 2025 Jéssica Naiara dos Santos, Paulo Roberto de Carvalho Spínola Filho, Tiago Aparecido Vieira Neves, Ariadne Marques, Any Caroliny Pinto Rodrigues, Cristiane Fernanda Fuzer Grael, Lílian de Araújo Pantoja, Alexandre Soares dos Santos, Janaína Fernandes Gonçalves, Edival Ângelo Valverde Zauza, Everton Pires Soliman, Rafael Aparecido Salis Carvalho, Emerson Delano Lopes, Marcelo Luiz de Laia
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Conselho Nacional de Desenvolvimento Científico e Tecnológico
Grant numbers 403523/2020-6
