The contribution of the melanin pathway to overall body pigmentation during ontogenesis of Periplaneta americana
The contribution of the melanin pathway to overall body pigmentation during ontogenesis of Periplaneta americana作者机构：Biological Sciences Department Wayne State University Detroit Michigan USA
出 版 物：《Insect Science》 (昆虫科学（英文版）)
年 卷 期：2016年第23卷第4期
页 面：513-519页
核心收录：
学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 09[农学] 0904[农学-植物保护] 0901[农学-作物学] 071002[理学-动物学] 0713[理学-生态学]
主 题：DOPA decarboxylase insect pigmentation melanin pathway Periplanetaamericana tyrosine hydroxylase
摘 要：The most prominent colors observed in insects are black or brown, whose production is attributed to the melanin pathway. At present, though, the contribution of this pathway to overall body pigmentation throughout ontogenesis is still lacking. To address this question we examined the roles of 2 key melanin genes （TH and DDC）, in embryonic and postembryonic development of the American cockroach, Periplaneta americana. Our results show that the melanin pathway does not contribute to the light brown coloration observed in the first nymphs. However, the dark brown coloration in mid nymphs and adults is produced solely from the melanin pathway. In addition, the DDC RNAi results reveal that it is dopamine melanin, not DOPA melanin, acts as the main contributor in this process. Overall, present study provides a new insight into insect pigmentation suggesting that genetic mechanisms of coloration can change during ontogenesis. Future studies of additional basal insect lineages will be required to assess in more details the generality of this phenomenon.
维普期刊数据库