Molecular phylogenetic analyzes and comparative cytology of the origin of compound chloroplasts and eucaryotic photosynthetic organisms with them.

复合叶绿体及其真核光合生物起源的分子系统发育分析和比较细胞学。

基本信息

批准号：
07454232
负责人：
HARA Yoshiaki
金额：
$ 4.61万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

The main objective of this research project was to elucidate the relation ship of the endocytosymbiosis and species diversity of photosynthetic organism with compound chloroplasts, based on their comparative ultrastructure and molecular phylogeny. At the first of this project, establishing the compound chloroplasts and evolutionary significance of eucaryotic photosynthetic organisms with them were invesitigated following the published information and the results obtained from this project, concernig with their subcellular characteristics. Secondaly, focusing on the chlorarachiophytes which are referred to the evolutionary chimaera with nucleomorphs of the receidure of nuleus of the symbiont, the origins of host and endosymbiont composing of the chlorarachiophyte cell were supposed by molecular phylogentic anayses of 18SrRNA,rbcL and EF-Tu gene homology.As the result obtained from the comparative cytology of the organisms with compound clororplasts, it can be pointed out that their spec … More ies divercity were closely related to the different combination of hosts and symbionts, variable degree controlling genetically new organelles originated from symbiont and host organelles, and different chaces encountered the endocytosymbionses during their evolutionary process.From the comparison with the photosynthetic pigment compositions, chlorarachiophyte plastids would be derived from prasionophycean algae. However, no phylogenetic evidenses heve never been given. Standing on this viewpoint, three genes mentioned above were established among chlorophyll a+b plants, including chorarachniophytes, ulvophytes, prasinophytes and their related organisms. As a results, chloroplasts of chlorarachniophytes would be originated from organisms related with Bryopsis but not from prasinophytes, which was rather related to plasts of euglenophytes. On the other hand, the origin of the host of chlorarachniophytes as ifferred from 18SrRNA was the related protozoa like to euglyphinids or cercomonads. Less

该研究项目的主要目的是根据比较超微结构和分子系统发育，阐明具有复合叶绿体的光生生物体的内吞和物种多样性。在该项目的第一个项目中，根据已发表的信息以及从该项目获得的，具有其亚细胞特征的Convernnig，研究了与它们的复合叶绿体和它们与它们的进化意义。其次，专注于用核对核酸含量的氯菊花植物，其符号的核代理，宿主的起源和内共生细胞的起源是由18srra，rbcl gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene gene genemocular anyayase of cole coleararachiophyte细胞的组成。由于从具有复合叶绿酸植物的生物体的比较细胞学获得的结果，可以指出，他们的规格……更多的不同差异与宿主和符号的不同组合密切相关，可变程度控制遗传性新细胞器的可变程度来自象征主义和宿主的构造细胞器，以及在众所周知的过程中，在临时的过程中进行了临时序列。光合色素组成，氯颌骨质体将源自prasionephycophycean藻类。但是，从未给出任何系统发育的研究。站在这个角度上，上面提到的三个基因是在叶绿素A+B植物中建立的，其中包括杂菌植物，乌尔多植物，prasinophytes及其相关生物。结果，将原始的叶绿素叶绿素是从与bryopsis相关的生物中原来的，而不是与乳脂质有关的，这与脂质有关。另一方面，从18srRNA抑制的氯藻植物的宿主的起源是相关的原生动物，喜欢与甘眼性或corcomonads。较少的