pollenmorphologyofparnassialparnassiaceaeanditssystematicimplications

	pollenmorphologyofparnassialparnassiaceaeanditssystematicimplications
	Wu Ding 1; Wang Hong1 ; Li Dezhu1 ; Stephen BLACKMORE 2
	2005
发表期刊	journalofintegrativeplantbiology
ISSN	1672-9072
卷号	47 期号:1 页码:2
摘要	The pollen morphology of 28 species of Parnassia L. was investigated with light microscopy and scanning electron microscopy (SEM). The shape of pollen grains in this genus varies from subspheroidal to prolate in equatorial view and is three-lobed circular in the polar view. Pollen grains are usually radially symmetrical, isopolar, tricolporate or syntricolporate, with reticulate sculpture. The pollen characteristics among species are fairly similar to each other. Morphological information regarding the pollen grains shows that Parnassia is a natural genus. Based on exine ornamentation observed under SEM, three types of pollen grains were recognized: (i) type I, with foveolate-reticulate sculpture; (ii) type II, with a finely reticulate sculpture; and (iii) type III, with a coarsely reticulate sculpture. Most sections of this genus have one type of sculpture of pollen morphology, but Sect. Nectarotrilobos has three types of sculpture and Sect. Saxifragastrum has two types of sculpture. All three types of sculpture can be found in Southwest China, with species with the longest (Parnassia delavayi Franch.) and shortest (Parnassiafaberi Oliv.) colpi, implying that Southwest China is the center of diversification of the genus.
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/69562
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.中国科学院昆明植物研究所 2.Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 SLR, Scotland
推荐引用方式 GB/T 7714	Wu Ding,Wang Hong,Li Dezhu,et al. pollenmorphologyofparnassialparnassiaceaeanditssystematicimplications[J]. journalofintegrativeplantbiology,2005,47(1):2.
APA	Wu Ding,Wang Hong,Li Dezhu,&Stephen BLACKMORE.(2005).pollenmorphologyofparnassialparnassiaceaeanditssystematicimplications.journalofintegrativeplantbiology,47(1),2.
MLA	Wu Ding,et al."pollenmorphologyofparnassialparnassiaceaeanditssystematicimplications".journalofintegrativeplantbiology 47.1(2005):2.