Differential timing response of Herbivory-Induced Volatiles (HIPVs) in Croton floribundus Spreng. (Euphorbiaceae)

Author(s)

Débora Pinheiro-Oliveira ^[1] ; Giselle da Silva Pedrosa ^[2] ; Silvia Ribeiro de Souza ^[3]

Affiliation

^[1] Instituto de Pesquisas Ambientais - Brasil

^[2] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas - Brasil

^[3] Instituto de Pesquisas Ambientais - Brasil

• Document type: Journal article
• Source: Hoehnea; v. 50, 2023-11-13.

Abstract

ABSTRACT In this study, we demonstrated that Tetranychus urticae Koch (Acari: Tetranychidae), a generalist herbivore, induces volatile organic compounds (VOC) in Croton floribundus Spreng., a pioneer species widely used in Brazilian urban area. We performed experiments to evaluate the quality and quantity of VOC emission at different times (two, six and 24 hours and within four and nine days) of infestation by T. urticae. Results show that C. floribundus emitted 23 volatiles after infestation, including monoterpene, sesquiterpene and green leaf volatiles. Significant differences were only detected between infested and non-infested plants after 24 hours of treatment, in particular methyl salicylate. In contrast, 3-hexen-1ol, linaool, geranyl acetone and caryophyllene seem to be inhibited by hourly infestation. The α-farnesene, methyl salicylate, 3-carene, 3-hexen-1ol benzoate and nerolidol were the main compounds induced after four infestation-days. This study highlights that VOCs blends in C. floribundus is depended on the feeding time-course of T. urticae and suggests that the VOC-mediated ecological interaction may be less efficient in a pioneer species. (AU)

• FAPESP's process: 16/25109-3 - plant volatiles in remnants of Atlantic Forest under the antropogenic influence
• Grantee: Silvia Ribeiro de Souza
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/11663-8 - Atmospheric ozone action on multiple functions of volatile organic compounds from native plants
• Grantee: Silvia Ribeiro de Souza
• Support Opportunities: Regular Research Grants