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《Journal of Biology》 2017-04
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Proventriculus ultrastructure and feeding divisions of the adult of Yunnan shoot borers,Tomicus species,lived in Pinus yunnanensis

LIU Jin-lin;ZHAO Ning;YANG Bin;LI Zhi-mei;LI Zong-bo;Key Laboratory of Forest Disaster Warning and Control in Yunnan Province,College of Forestry;Faculty of Life Science,Southwest Forestry University;  
The Yunnan shoot borers,Tomicus species,are indigenous shoot-feeding beetles that attack the Pinus yunnanensis in southern China. To provide a generally concentration on the physiological aspects and feeding divisions,the proventriculus of 4 Tomicus species,including T. yunnanensis,T. minor,T. piniperda and T. brevioplius,were analyzed with scanning electron microscopy. The results showed the adult proventriculus consisted of 8 chitinous plates are in lantern-like shape. Each plate is involved in the anterior plate and masticatory plate. The former has no median suture on the surface plate,which presents many transverse tooth lines with all types of denticles; while the latter is composed of declivity,stopping bristles and mastiutory brush. Together evolutionary relationship of proventricular structure corroborate the cuticular denticles and stopping bristles as well as substitute stopping bristles that play a critical role in feeding divisions among the scolytidae. Particularly,the spine-like hairs occurred on the median suture may indicate the niche difference of coadaptation on Tomicus species. The results will benefit for the further understanding the nutrient utilization and resistance ability of Tomicus species to the host trees.
【Fund】: 国家自然科学基金(31560213 31260179);; 云南省应用基础研究(2011FZ139);; 云南省森林灾害预警与控制重点实验室项目(ZK150006);; 云南省高校科技创新团队项目
【CateGory Index】: S763.38
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