2009 Fiscal Year Final Research Report

The Research of the Origin and the Diversification of Apogamy Species in the Pteridophyte

Research Project

Project/Area Number	19570087
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Biodiversity/Systematics
Research Institution	Shimane University
Principal Investigator	LIN Su-juan Shimane University, 生物資源科学部, 准教授 (10362914)
Project Period (FY)	2007 – 2009
Keywords	生殖様式 / シダ植物 / 無配生殖 / 不等分裂 / 倍数性 / 配偶体(前葉体)
Research Abstract	The reproduction brings large influence in the evolution process of the bio-mechanism of the speciation. It was reported that most Pteridophyte performed the apogamy other than normal sexual reproduction. It is important to study about the speciation and diversity process of the apogamy for clarifying 「species」 variety of the Pteridophyte. In this study, it was clarified that the fern plants of Dryopteris erythrosora produced different polyploidy spores by inequality reduction division and the archegonia were formed in apogamy prothallia. It was proofed that the Pteridophyte perform complex diversity mechanism for taking in genetic variation based on reproductive processes such as inequality cell division, the hybridization origin.