Croton argenteus preparation inhibits initial growth, mitochondrial respiration and increase the oxidative stress from Senna occidentalis seedlings

Anais da Academia Brasileira de Ciências

Katlin S. Rech¹  Cristiane B. Silva¹  Juliana D. Kulik¹  Josiane F.g. Dias¹  Sandra M.w. Zanin¹  Vitor A. Kerber¹  Fernanda M.m. Ocampos¹  Luciane Dalarmi¹  Gedir O. Santos¹  EuclÉsio Simionatto¹  Cristina P. Lima¹  ObdÚlio G. Miguel¹  Marilis D. Miguel¹ 

关键词: Alelochemicals;    fedegoso;    velame branco;    ATP synthesis;    antioxidant defense;    Aleloquímicos;    fedegoso;    velame branco;    síntese de ATP;    defesa antioxidante;   

DOI  :  10.1590/0001-3765201520140238

来源: SciELO

【 摘 要 】

Senna ocidentalis is a weed, native to Brazil, considered to infest crops and plantations, and is responsible for yield losses of several crops, particularly soybean. The aim of this work was to evaluate if theCroton argenteus extract and fractions possess phytotoxic activity on S. ocidentalis. The crude ethanolic extract (CEE) and its hexanic (HF), chloroformic (CLF) and ethyl acetate (EAF) fractions were tested in germination, growth, oxidative stress increase, Adenosine triphosphate, L-malate and succinate synthesis. The crude extract and its fractions slowed down the germination of S. ocidentalis and decreased the final percentage of germination. Oxidative stress was also increased in the seedlings, by an increase of catalase, peroxidase, superoxide dismutase, glutathione reductase and lipid peroxidation; and it became clear that the ethyl acetate fraction was more phytotoxic. The results indicate that the crude extract and fractions of C. argenteus compromise the mitochondrial energy metabolism, by the inhibition of mitochondrial ATP production, with a decrease in the production of L-malate and succinate. The ethyl acetate fraction of C. argenteus showed high activity on germination and growth, and these effects take place by means of mitochondrial metabolism alterations and increase the oxidative stress, leading the seedling death.

【 授权许可】

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