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Biological activities of lignans and stilbenoids associated with plant-insect chemical interactions
The results indicate that such phenylpropanoid-derived compounds can possess ecdysteroid antagonistic activity, which could potentially influence insect development. Expand
Chromatographic procedures for the isolation of plant steroids.
In this review, we consider the general principles and specific methods for the purification of different classes of phytosteroids which have been isolated from plant sources: brassinosteroids,… Expand
Phytoecdysteroids: Diversity, Biosynthesis and Distribution
Effects of pyrrolizidine alkaloids and sesquiterpenes on snail feeding
The feeding response of two populations of the generalist herbivorous snail Arianta arbustorum towards the composite Adenostyles alliariae and towards various allelochemicals is determined, suggesting that the snails have mechanisms for the rejection of alleLochemicals which they encounter in their natural food plants, but not for novel allelocemicals. Expand
Structure-efficiency relationship in derivatives of stilbene. Comparison of resveratrol, pinosylvin and pterostilbene.
- T. Perečko, V. Jančinová, K. Drábiková, R. Nosál', J. Harmatha
- Chemistry, Medicine
- Neuro endocrinology letters
- 1 October 2008
The presence of different functional groups in the molecules of stilbenoids influence their antioxidative effect, and modification of these functional groups may result in derivatives with required antioxidative properties, targeting mainly extracellular ROS which are responsible for tissue damage during chronic inflammation. Expand
Insect feeding deterrent activity of lignans and related phenylpropanoids with a methylenedioxyphenyl (piperonyl) structure moiety
Natural lignan lactones with methoxy and/or methylenedioxy substituents showed significant activity that is strong enough to affect plant ‐ insect interactions, and the most active compound was synthetic piperonylbutoxide. Expand
Identification of a spirostane-type saponin in the flowers of leek with inhibitory effects on growth of leek-moth larvae
The toxic compound for leek-moth larvae, Acrolepiopsis assectella has been isolated from the flowers of leek, Allium porrum and identified as 3-O-β-d-xylopymnosyl, identical with aginosid, a saponin isolated earlier from ,Allium giganteum. Expand
Can chemical cues from blossom buds influence cultivar preference in the apple blossom weevil (Anthonomus pomorum)?
Findings support a hypothesis that the adult weevils use chemical cues for olfactory discrimination during host‐searching behaviour in mixed apple tree orchards. Expand
Trilobolide and related sesquiterpene lactones from Laser trilobum possessing immunobiological properties.
- J. Harmatha, M. Budĕs̆ı́nský, K. Vokáč, P. Kostecká, E. Kmoníčková, Z. Zídek
- Chemistry, Medicine
- 1 September 2013
Results demonstrate that trilobolide and its acetoxy analog are strong activators of cytokine secretion and inhibitors of the cytokine and nitric oxide production. Expand
Photochemical transformation of 20-hydroxyecdysone: production of monomeric and dimeric ecdysteroid analogues
The transformed dimeric analogue of 20-hydroxyecdysone retained the high agonistic activity on the ecdysone receptor in the B(II)-bioassay compared with the original 20E. Expand