Dunker Susanne, Wilhelm Christian
Helmholtz-Centre for Environmental Research - UFZ, Leipzig, Germany.
German Centre for Environmental Research - iDiv, Leipzig, Germany.
Front Microbiol. 2018 Apr 13;9:719. doi: 10.3389/fmicb.2018.00719. eCollection 2018.
Coccoid green algae can be divided in two groups based on their cell wall structure. One group has a highly chemical resistant cell wall (HR-cell wall) containing algaenan. The other group is more susceptible to chemicals (LR-cell wall - Low resistant cell wall). Algaenan is considered as important molecule to explain cell wall resistance. Interestingly, cell wall types (LR- and HR-cell wall) are not in accordance with the taxonomic classes Chlorophyceae and Trebouxiophyceae, which makes it even more interesting to consider the ecological function. It was already shown that algaenan helps to protect against virus, bacterial and fungal attack, but in this study we show for the first time that green algae with different cell wall properties show different sensitivity against interference competition with the cyanobacterium . Based on previous work with co-cultures of and two green algae ( and ) differing in their cell wall structure, it was shown that could impair only the growth of the green algae if they belong to the LR-cell wall type. In this study it was shown that the sensitivity to biotic interference mechanism shows a more general pattern within coccoid green algae species depending on cell wall structure.
球形绿藻可根据其细胞壁结构分为两组。一组具有高度耐化学性的细胞壁（HR细胞壁），含有藻烷。另一组对化学物质更敏感（LR细胞壁 - 低抗性细胞壁）。藻烷被认为是解释细胞壁抗性的重要分子。有趣的是，细胞壁类型（LR和HR细胞壁）与绿藻纲和 trebouxophyceae 分类类别不一致，这使得考虑其生态功能变得更加有趣。已经表明藻烷有助于抵御病毒、细菌和真菌的攻击，但在本研究中，我们首次表明具有不同细胞壁特性的绿藻对与蓝细菌的干扰竞争表现出不同的敏感性。基于之前对两种细胞壁结构不同的绿藻（ 和 ）与 共培养的研究，结果表明 仅能损害属于LR细胞壁类型的绿藻的生长。在本研究中表明，对生物干扰机制的敏感性在球形绿藻物种中呈现出更普遍的模式，这取决于细胞壁结构。
