Predation drives convergent evolution of the thick and baggy cuticle in nematodes
Predation drives convergent evolution of the thick and baggy cuticle in nematodes
复制标题
捕食驱动线虫厚而松垮的角质层的趋同进化
DOI：
10.1163/15685411-bja10196
复制
发表时间：
2022
期刊：
影响因子：
1.2
通讯作者：
Shinya Ryoji
中科院分区：
文献类型：
--
作者：
Ichiishi Kanata;Ekino Taisuke;Kanzaki Natsumi;Shinya Ryoji
线虫角质层是一种重要的结构，可提供免受非生物环境胁迫和天敌侵害的保护。对从日本京都分离出的 Myolaimus 物种（培养代码 NKZ384）的角质层超微结构进行了检查，以了解其避免被滑刃类捕食者 Seinura Caverna 捕食的情况。 Myolaimus sp 的生存能力。对与捕食者共培养的样本进行了检查，并与四种 Poikilolaimusspp 进行了比较。 Myolaimus 和四个 Poikilolaimus spp 中的两个。共享“宽松”的角质层并有效地抵抗捕食。然而，这两个属的超微结构有所不同：即 Myolaimussp 的角质层。是七区的，而 P 的。雷根富西和P.氧化尾蚴五区。此外，Myolaimussp。不具有 Poikilolaimus spp 中报道的特征性嗜渗区。因此，尽管超微结构不同，但在这两个系统发育上距离较远的属中发现的厚而松垮的角质层表现出抵抗捕食的功能趋同。
The nematode cuticle is an important structure that provides protection from abiotic environmental stresses and natural enemies. The cuticle ultrastructure of aMyolaimusspecies (culture code NKZ384) isolated from Kyoto, Japan, was examined in relation to its avoidance of predation by an aphelenchoidid predator,Seinura caverna. The survivability ofMyolaimussp. co-cultured with the predator was examined and compared with those of fourPoikilolaimusspp. previously reported by the present authors.Myolaimusand two of the fourPoikilolaimusspp. share a ‘baggy’ cuticle and resisted predation effectively. However, the ultrastructure differed between these two genera:i.e., the cuticle ofMyolaimussp. is seven-zoned, while that ofP. regenfussiandP. oxycercusis five-zoned. In addition,Myolaimussp. does not possess the characteristic osmophilic zone reported inPoikilolaimusspp. Therefore, although the ultrastructure differs, the thick and baggy cuticle found in these two phylogenetically distant genera exhibits functional convergence to resist predation.