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Nat Prod Res 2019 Feb 01;334:557-562. doi: 10.1080/14786419.2017.1396587.
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Natural products from Pluchea sagittalis act as inhibitors of photosynthesis in vitro.

Carvalho AC , Lira JCS , Pereira TM , Silva SC , Simote-Silva SY , Oliveira FKD , King-Diaz B , Lotina-Hennsen B , Veiga TAM .

Four compounds were isolated from roots and aerial parts of Pluchea sagittalis (Asteraceae), 3, 5-dihydroxy-6, 7, 3'', 4''-tetramethoxiflavunol (1), 5-hydroxymethylfurfural (2), 3, 4-dimethoxybenzaldehyde (3) and 2, 3, 4-trihydroxybenzaldeyde (4). Their herbicidal potential was detected by polarographic techniques. All of them inhibited the non-cyclic electron transport on basal, phosphorylating and uncoupled conditions from H2O to methylviologen (MV); thus, they act as Hill reaction inhibitors. Studies on fluorescence of chlorophyll a (ChL a) indicated they have different modes of interaction and inhibition sites on the photosystem II electron transport chain; 1-3 have interacted with the acceptor side while 4 has interacted at the donor side.

PubMed ID: 29086612
Article link: Nat Prod Res

Genes referenced: LOC590297 LOC593824