苦皮藤素Ⅳ和Ⅴ混合物对果蝇幼虫神经肌肉兴奋性接点电位的影响

Abstract

Abstract:

Celangulin Ⅳ and Ⅴ isolated from the root bark of the Chinese bittersweet, Celastrus angulatus Max. are the major active insecticidal ingredients of this plant. The mixed effects of celangulin Ⅳ and Ⅴ on insect neuromuscular excitatory junction potentials (EJPs) were studied by using the intracellular microelectrode recording on the ventral longitudinal body-wall muscle fibers of the 3rd instar larvae of Drosophila melanogaster. The results indicated that the effects of the mixture of celangulin Ⅳ and Ⅴ on EJPs of D. melanogasterlarvae, in which celangulin Ⅳ was in higher ratio, were same as that of celangulin Ⅳ. The blocking time of EJPs was delayed by the mixture of celangulin Ⅳ and Ⅴ, in which celangulinⅤ was in higher ratio. In conclusion, celangulin Ⅳ and Ⅴ could have different effects on glutamate potential of insect synapses.

Key words: Botanical insecticides, celangulin, mixture, excitatory junction potentials (EJPs), intracellular microelectrode recording

HU Zhao-Nong, WU Wen-Jun, HE Bing-Jun, Liu An-Xi. Effects of the mixture of celangulin Ⅳ and Ⅴ from Celastrus angulatus Max. on excitatory junction potentials of Drosophila melanogaster larvae[J]., 2005, 48(6): 876-880.

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Effects of the mixture of celangulin Ⅳ and Ⅴ from Celastrus angulatus Max. on excitatory junction potentials of Drosophila melanogaster larvae

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