Eyes of differing colors in Alvinocaris longirostris from deep-sea chemosynthetic ecosystems: genetic and molecular evidence of its formation mechanism
Eyes of differing colors in Alvinocaris longirostris from deep-sea chemosynthetic ecosystems: genetic and molecular evidence of its formation mechanism
复制标题
深海化学合成生态系统中不同颜色的长角藻眼：其形成机制的遗传和分子证据
DOI：
10.1007/s00343-020-9312-5
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发表时间：
2020-05
影响因子：
1.6
通讯作者：
Zhongli Sha
中科院分区：
文献类型：
--
作者：
Qian Xin;Min Hui;Chaolun Li;Zhongli Sha
着色是一种重要的表型性状，具有多种适应功能。长吻裸虾Alvinocaris longirostris在西北太平洋深海冷泉区和深海热液喷口区发现了白眼（AW）和橙眼（AO）现象。通过转录组比较分析，共发现1491个差异表达基因（DEG）。其中，许多DEGs与免疫、抗氧化和解毒有关。黄嘌呤脱氢酶和色氨酸氧化酶两个参与色素合成途径的重要酶编码基因在AW和AO中分别上调，这可能与白色和橙子眼表型的差异有关。单核苷酸多态性（SNP）检测发现，AW和AO的14个单基因中有28个SNP的基因型完全不同。特别是免疫基因crustin Pm5和抗菌肽分别存在3个和2个非同义突变。 该途径初步解释了Alvinocaridid虾不同眼表型的形成机制，为进一步研究深海化能合成动物群中眼的适应性进化提供了基础。
Coloration is an important phenotypic trait for multiple adaptive functions. It is interesting to find white-eye (AW) and orange-eye (AO) phenotypes in the shrimp Alvinocaris longirostris inhabiting the deep-sea cold seep and hydrothermal vent areas of the northwestern Pacific. By comparative transcriptome analyses, 1 491 differentially expressed genes (DEGs) were identified between AW and AO. Among them, many DEGs were associated with immunity, antioxidation, and detoxification. Two significant enzyme encoding genes, xanthine dehydrogenase, and tryptophan oxidase involved in pigment biosynthesis pathways were up-regulated in AW and AO, respectively, which might be related to the differences of white and orange eye phenotypes. Moreover, single nucleotide polymorphism (SNP) calling detected that genotypes of 28 SNP distributing in 14 unigenes were completely different between AW and AO. Particularly, there were three and two non-synonymous mutations in immune genes crustin Pm5 and antimicrobial peptide , respectively. The suggested pathway preliminarily explained the formation mechanism of different eye phenotypes in Alvinocaridid shrimps, providing a basis for further study on adaptive evolution of eyes in deep-sea chemosynthetic faunas.
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