Synthesis and Phytotoxicity Evaluation of Novel 6α,7β‐Dihydroxyvouacapan‐17β‐oic Acid Derivatives.

Castelo-Branco, Pedro A.; Rubinger, Mayura M. M.; Resende, Jarbas M.; Silva, Antônio Augusto Moura da; Ferreira-Alves, Dalton L.; Piló‐Veloso, Dorila

doi:10.1002/chin.200646213

Cited by 2 publications

(1 citation statement)

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“…Compounds 178 -181 ( Figure 3) were prepared via the chemical modification and their phytotoxic activity was also evaluated. [46] Compound 178 inhibited the radicle growth of C. sativus with an inhibition rate of 32 %, while compounds 179 and 180 stimulated the root growth of C. sativus ranging from 9 to 19 %. However, these four compounds had no significant effects on the root growth of S. bicolor.…”

Section: Vouacapanesmentioning

confidence: 98%

Phytotoxic Diterpenoids from Plants and Microorganisms

Wei

et al. 2019

Chemistry & Biodiversity

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Phytotoxic natural products with either unique or various structures are one of the most abundant sources for the discovery of potential allelochemicals, natural herbicides, and plant growth regulators. Phytotoxic diterpenoids, a relatively large class of natural products, play an important role in the plant‐plant or plant‐microorganism interactions. This article argues that the phytotoxic diterpenoids isolated from the plants and microorganisms can either inhibit the seed germination and the growth of plant seedlings or lead to some disease symptoms on the tested plant tissues and plant seedlings.

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Section: Vouacapanesmentioning

confidence: 98%

Phytotoxic Diterpenoids from Plants and Microorganisms

Wei

et al. 2019

Chemistry & Biodiversity

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Inhibition and Uncoupling of Photosynthetic Electron Transport by Diterpene Lactone Amide Derivatives

Castelo-Branco

Santos

Rubinger

et al. 2008

Zeitschrift Für Naturforschung C

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Nine diterpene lactone amide derivatives 1-9 were synthesized from 6-oxovouacapan- 7β,17β-lactone, which was obtained from 6α,7β-dihydroxyvouacapan-17β-oic acid isolated from Pterodon polygalaeflorus Benth., and tested for their activity on photosynthetic electron transport. Amide derivatives 3-5 behaved as electron transport chain inhibitors; they inhibited the photophosphorylation and uncoupled non-cyclic electron transport from water to methylviologen (MV). Furthermore, 4 and 5 enhanced the basal electron rate acting as uncouplers. Compound 6 behaved as an uncoupler; it enhanced the light-activated Mg2+-ATPase and basal electron flow, without affecting the uncoupled non-cyclic electron transport. Compounds 1-2 and 7-9 were less active or inactive. Compounds 3-5 did not affect photosystem I (PSI); they inhibited photosystem II (PSII) from water to 2,6-dichlorophenol indophenol (DCPIP). Compound 4 inhibited PSII from water to silicomolybdate (SiMo), but it had no effect on the reaction from diphenylcarbazide (DPC) to DCPIP indicating that its inhibition site was at the water splitting enzyme complex (OEC). Compounds 3 and 5 inhibited PSII from water to DCPIP without any effect from water to SiMo, therefore they inhibited the acceptor site of PSII. Chlorophyll a fluorescence kinetics confirmed the behaviour of 3-5

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Synthesis and Phytotoxicity Evaluation of Novel 6α,7β‐Dihydroxyvouacapan‐17β‐oic Acid Derivatives.

Cited by 2 publications

References 1 publication

Phytotoxic Diterpenoids from Plants and Microorganisms

Phytotoxic Diterpenoids from Plants and Microorganisms

Inhibition and Uncoupling of Photosynthetic Electron Transport by Diterpene Lactone Amide Derivatives

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