Evaluation of antidesmone alkaloid as a photosynthesis inhibitor

Evaluation of antidesmone alkaloid as a photosynthesis inhibitor

Author Sampaio, Olivia Moreira Google Scholar
de Castro Lima, Murilo Marinho Google Scholar
Veiga, Thiago Andre Moura Autor UNIFESP Google Scholar
King-Diaz, Beatriz Google Scholar
das Gracas Fernandes da Silva, Maria Fatima Google Scholar
Lotina-Hennsen, Blas Google Scholar
Abstract Antidesmone, isolated from Waltheria brachypetala Turcz., owns special structural features as two alpha,beta-unsaturated carbonyl groups and a side alkyl chain that can compete with the quinones involved in the pool of plastoquinones at photosystem II (PSII). In this work, we showed that the alkaloid is an inhibitor of Hill reaction and its target was located at the acceptor side of PSII. Studies of chlorophyll (Chl) a fluorescence showed a J-band that indicates direct action of antidesmone in accumulation of Q(A)(-) (reduced plastoquinone A) due to the electron transport blocked at the QB (plastoquinone B) level similar to DCMU. In vivo assays indicated that antidesmone is a selective post-emergent herbicide probe at 300 mu M by reducing the biomass production of Physalis ixacarpa plants. Furthermore, antidesmone also behaves as pre-emergent herbicide due to inhibit Physalis ixacarpa plant growth about 60%. Antidesmone, a natural product containing a 4(1H)-pyridones scaffold, will serve as a valuable tool in further development of a new class of herbicides. (C) 2016 Elsevier Inc. All rights reserved.
Keywords Antidesmone
Chlorophyll a
Photosystem II
ATP synthesis
Herbicide
Photosynthetic inhibitor
xmlui.dri2xhtml.METS-1.0.item-coverage San Diego
Language English
Sponsor DGAPA-UNAM
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number DGAPA-UNAM: IT102012
Date 2016
Published in Pesticide Biochemistry And Physiology. San Diego, v. 134, p. 55-62, 2016.
ISSN 0048-3575 (Sherpa/Romeo, impact factor)
Publisher Academic Press Inc Elsevier Science
Extent 55-62
Origin http://dx.doi.org/10.1016/j.pestbp.2016.04.006
Access rights Closed access
Type Article
Web of Science ID WOS:000389967600008
URI https://repositorio.unifesp.br/handle/11600/56805

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