Abstract：
:Antidesmone, isolated from Waltheria brachypetala Turcz., owns special structural features as two α,β-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 QA- (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 300μM 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.
journal_name
Pestic Biochem Physioljournal_title
Pesticide biochemistry and physiologyauthors
Sampaio OM,Lima MM,Veiga TA,King-Díaz B,da Silva MF,Lotina-Hennsen Bdoi
10.1016/j.pestbp.2016.04.006subject
Has Abstractpub_date
2016-11-01 00:00:00pages
55-62eissn
0048-3575issn
1095-9939pii
S0048-3575(16)30034-7journal_volume
134pub_type
杂志文章abstract：:Although there have been many reports on the synergistic interactions among the major constituents of plant essential oils regarding insecticidal activity, their underlying mechanism of synergy is poorly understood. In our previous studies, we found each of the two most abundant constituents of rosemary (Rosmarinus of...
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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journal_title：Pesticide biochemistry and physiology
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更新日期：2020-05-01 00:00:00
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journal_title：Pesticide biochemistry and physiology
pub_type： 杂志文章
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更新日期：2019-10-01 00:00:00
abstract：:A series of novel aryloxyphenoxypropionate (APP) herbicides containing benzofuran moiety were designed, synthesized and tested for herbicidal activity. The bioassay results indicated that most of target compounds possessed moderate to good herbicidal activity against monocotyledonous weeds. Compounds 5a-5d and 6a-6d s...
journal_title：Pesticide biochemistry and physiology
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