权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

A study of evolution of plants in South Pacific islands

南太平洋岛屿植物进化研究

基本信息

批准号：
11691185
负责人：
TOBE Hiroshi
金额：
$ 5.76万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11691185/
关键词：
South Parific Island biology Plant evolution Renroductive mechanism Chromosome Floral scent Mangroves 系統ニューカレドニア New Caledonia Pacific islands Phologeny Plant Evolution

项目摘要

The purpose of the present study is to contribute to better understanding of evolution and reproductive mechanisms of plant species growing in South Pacific islands. Our output is as follows.1. We presented the first embryological study of Amborella trichopoda representing the first branch of angiosperm evolution, which is an endemic species in New Caledonia. Compared to already known information on Nymphaeales and Illiciales which represent branches next to Amborella, symplesiomorphies of embryological characters were clarified. (Tobe et al. 2000).2. We presented the first karyotype analysis in Amborella trichopoda. It has 2n=26 with x=13. Based on analyses, we discussed that the chromosome number of Amborella is likely to have been derived from x=14 and that a primitive chromosome number of angiosperms is likely to be x=7. (Oginuma et al. 2000).3. A review of embryological studies on Laurales which are distributed worldwide in tropics of Old and New World including South Pacific isla … More nds was presented on the basis of a literature survey. In addition, in the light of molecular trees available for the Laurales, we tried to discuss an evolution of embryological characters, and simultaneously clarified what plant groups and what embryological characters need investigations. (Kimoto and Tobe 2001).4. An overall phylogenetic study of Casuarinaceae that are distributed in South Pacific islands (and Australia) was conducted for the first time using chloroplast DNA sequences of rbcL and matK. Results showed relationships like (Gynmostoma (Ceuthostoma (Allocasuarina Casuarina))). (Sogo et al. 2001).5. We analyzed floral scent in 8 species of 8 genera growing hi mangrove of Iriomote islands, Japan for the first time. We found 61 chemical compounds and discussed relationships with polinators. (Azuma et al. 2002).6. Fourteen species of Begonia from Taiwan were analyzed with respect to karyotypes of their somatic chromosomes for the first time. Based on results, we discussed their evolution, and clarified that 5 new species exist in Taiwan. (Oginuma and Peng 2002). Less

本研究的目的是有助于更好地了解生长在南太平洋岛屿的植物物种的进化和繁殖机制。我们的输出如下。1.本文首次对新喀里多尼亚特有的被子植物Amborella spicpoda进行了胚胎学研究。Amborella spicpoda是被子植物进化的第一个分支。与睡莲目（Nymphaeales）和八角目（Illiciales）的已知信息相比，它们代表了Amborella旁边的分支，澄清了胚胎学特征的symplexiomorphies。(Tobe等人，2000）。首次报道了钝足螺的核型分析结果。2n=26，x=13。根据分析结果，讨论了Amborella的染色体数目可能是由x=14衍生而来，被子植物的原始染色体数目可能是x=7。（Oginuma等人，2000年）。本文综述了分布于世界热带包括南太平洋岛屿的樟目植物的胚胎学研究 ...更多信息 nds是在文献调查的基础上提出的。此外，根据现有的樟科植物分子树，我们还试图讨论樟科植物胚胎学性状的进化，同时阐明哪些植物类群和哪些胚胎学性状需要研究。（Kimoto and Tobe 2001）。首次利用叶绿体rbcL和matK基因序列对分布于南太平洋岛屿（和澳大利亚）的木麻黄科植物进行了系统发育研究。结果表明，它们之间的亲缘关系为（Gynmostoma（Ceuthostoma（Allocasuarina木麻黄）。(Sogo等人，2001）。本文首次对日本西表岛红树林中8属8种植物的花香进行了分析。我们发现了61种化合物，并讨论了与polinators的关系。（Azuma等人，2002）。6.本文首次对采自台湾的十四种秋海棠进行了体细胞染色体核型分析。根据研究结果，我们讨论了它们的演化，并澄清了5个新种存在于台湾。（Oginuma and Peng 2002）。少