Dipteryx alata, a tree native to the Brazilian Cerrado, is sensitive to the herbicide nicosulfuron

Autor(es)

Silva, Fabia Barbosa ^{[1, 2]} ; Costa, Alan Carlos ^[1] ; Mueller, Caroline ^[1] ; Nascimento, Kelly Telles ^[1] ; Batista, Priscila Ferreira ^[1] ; Vital, Roberto Gomes ^[1] ; Megguer, Clarice Aparecida ^[3] ; Jakelaitis, Adriano ^[1] ; Domingos, Marisa ^[4]

Afiliação do(s) autor(es)

^[1] Inst Fed Educ Ciencia & Tecnol Goiano, Campus Rio Verde, Caixa Postal 66, BR-75901970 Rio Verde, Go - Brazil

^[2] Univ Sao Paulo, Lab Estudo Plantas Estresse, Escola Super Agr Luiz de Queiroz, Caixa Postal 9, BR-13418900 Piracicaba, SP - Brazil

^[3] Inst Fed Educ Ciencia & Tecnol Goiano, Campus Morrinhos, Caixa Postal 92, BR-75650000 Morrinhos, Go - Brazil

^[4] Inst Bot, Nucleo Pesquisa Ecol, Caixa Postal 68041, BR-04045972 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY; v. 29, n. 2 FEB 2020.
• Citações Web of Science: 3

Resumo

The expansion of land use for agricultural interests and the excessive use of herbicides are among the causes of biodiversity losses in the Brazilian Cerrado biome. Therefore, we aimed to test the hypothesis that Dipteryx alata Vogel, a common species in this biome, is sensitive to nicosulfuron because of its high phytotoxicity. We evaluated physiological, biochemical and morphological responses in D. alata plants exposed to increasing doses of the herbicide. Young plants were transplanted to 10 L pots containing substrate composed of soil and sand (2:1) after fertilization. After an acclimation period, the following doses of nicosulfuron were applied: 0 (control), 6, 12, 24, 48, and 60 g a.e. ha(-1). The experiment was conducted in a randomized block design factorial scheme with six doses of nicosulfuron, three evaluation times, and five replicates per treatment. The effects of the herbicide were assessed by measuring gas exchange, chlorophyll a fluorescence, photosynthetic pigments, membrane permeability, antioxidant enzymes and acetolactate synthase. Nicosulfuron altered the photosynthetic machinery and enzymatic metabolism of D. alata. Reductions in physiological traits, increased catalase and ascorbate peroxidase activities, enhanced malondialdehyde concentrations rate of electrolyte leakage and decreased acetolactate synthase activity in response to nicosulfuron all suggest that D. alata is sensitive to this herbicide. (AU)

• Processo FAPESP: 10/52319-2 - Monitoramento de mudanças ambientais induzidas por poluentes, originados de diferentes usos da terra pelo homem e seus efeitos sobre remanescentes de vegetação nativa
• Beneficiário: Marisa Domingos
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular