Effects of acetogenins from Annona coriacea Mart. on the in vitro reactions of photosynthesis,Chemistry & Biodiversity

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Effects of acetogenins from Annona coriacea Mart. on the in vitro reactions of photosynthesis
Chemistry & Biodiversity ( IF 2.3 ) Pub Date : 2020-10-16 , DOI: 10.1002/cbdv.202000484
Vanessa Gisele Pasqualotto Severino ₁ , Jorge Luiz Souza Simão ₁ , João Gabriel Moraes Junqueira ₂ , Ana Calheiros de Carvalho ₃ , Beatriz King-Díaz ₄ , Blas Lotina-Hennsen ₄ , Ana Paula Terezan ₁ , Thiago André Moura Veiga ₃

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Our search for candidates for photosynthesis inhibitors is allowing us to report the effect of two acetogenins identified in Annona coriacea Mart. leaves, ACG−A and ACG−B, a non‐adjacent bis‐THF and a mono‐THF types, respectively. This is an important class of natural products which presents biological properties such as anticancer, neurotoxic, larvicidal and insecticidal. However, this is only the second report associated to its herbicidal activity. Their mechanisms of action on the light reactions of the photosynthesis were elucidated by polarographic techniques. Compounds inhibited the noncyclic electron transport on basal, phosphorylating, and uncoupled conditions from H2O to methyl viologen (MV); therefore, they act as Hill reaction inhibitors. Studies on fluorescence of chlorophyll a (ChL a) indicated that they inhibited the acceptor side of PSII between P680 and PQ‐pool, exactly as the commercial herbicide DCMU does.

中文翻译：

Annona coriacea Mart 中醋原素的作用。关于光合作用的体外反应

我们对光合作用抑制剂候选物的搜索使我们能够报告在 Annona coriacea Mart 中鉴定出的两种醋原素的作用。叶子，ACG-A 和 ACG-B，分别是不相邻的双 THF 和单 THF 类型。这是一类重要的天然产物，具有抗癌、神经毒性、杀幼虫和杀虫等生物学特性。然而，这只是与其除草活性相关的第二份报告。通过极谱技术阐明了它们对光合作用光反应的作用机制。化合物在基础、磷酸化和非偶联条件下抑制了从 H2O 到甲基紫精 (MV) 的非环状电子传递；因此，它们充当希尔反应抑制剂。

更新日期：2020-10-16

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