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endocuticle is involved in caste differentiation of the lower termite

Current Zoology 2021年第5期67卷 489-499页

作者： Chenxu YE Zhuanzhuan SONG Taoyu WU Wenxiu ZHANG Noor us SABA Lianxi XING Xiaohong SU Shaanxi Key Laboratory for Animal Conservation Northwest UniversityXi’an 710069China College of Life Sciences Northwest UniversityXi’an 710069China

Caste differentiation in termites is one of the most conspicuous examples of facultative polyphenism in *** is clear that specific cuticular formation occurs in hard exocuticles during caste ***,the developmental pattern of the soft endocuticle in the differentiation pathways of castes is *** reveal whether the endocuticle is involved in caste differentiation,we compared the exocuticle and endocuticle thickness of individuals in 2 pathways(nymph line and worker line)of caste differentiation in the termite Reticulitermes *** endocuticle protein genes were identified by transcriptome analysis and the expression patterns of these genes were confirmed in caste *** found that the endocuticle structure showed dynamic changes in 2 pathways,and the first difference in endocuticle structure occurred after larvae differentiation bifurcated into workers and *** thinning of the endocuticle was a significant event from nymphs developing into alates with the thickest exocuticle and thinnest *** thickest endocuticle layers were found in the heads of the workers and the ultrastructure of the endocuticle in the heads was more complex than that in the thorax–*** endocuticle protein genes were identified and annotated as endocuticle structural glycoproteins SgAbd-2,SgAbd-9,and *** expression levels of endocuticle protein genes changed dramatically during caste development and the expression levels in neotenic reproductives(secondary reproductives)were significantly higher than those in alates(primary reproductives).These results reveal the roles of endocuticles in caste differentiation and adaptation to the environment.

关键词： adaptive evolution caste differentiation endocuticle gene expression transcriptomes

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