Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Volume 212, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2020.112021
Keywords
Natural products; Flavonoids; Anti-herbivore defense; Antioxidants; Photosynthetic efficiency; Freshwater environment
Categories
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao Carlos Chagas de Amapro a Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Programa de Pesquisas Ecologicas de Longa Duracao (PELD)/CNPq
- CNPq
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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Ultraviolet B-light (UV-B) can exert indirect effects on plant-herbivore interactions by inducing changes in constitutive and induced chemical defenses, since it modulates physiological aspects of plants. This study evaluated the action of UV-B radiation on photosynthesis and production of secondary metabolites in Nymphoides humboldtiana and the cascade effects on the relationship of this macrophyte with a generalist herbivore, the gastropod mollusk Biomphalaria glabrata. After 13 days of UV-B exposition under laboratory conditions, the floating macrophyte N. humboldtiana responded increasing its photosynthetic potential and the production of flavonoids with a correlated enhance in antioxidant activity. However, these changes observed in its metabolism were not enough to alter their palatability to consumption by B. glabrata verified through laboratory feeding choice experiments. Despite the known deleterious effects of exposure to UV-B on terrestrial plants, we found that N. humboldtiana does have physiological/biochemical mechanisms as a strategy or restorative response to this potencially adverse or impacting agent without changing its relationships with herbivores.
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