Pollen Organ Telangiopsis sp of Late Devonian Seed Plant and Associated   Vegetative Frond

doi:10.1371/journal.pone.0147984

CORC > 北京大学 > 地球与空间科学学院

	Pollen Organ Telangiopsis sp of Late Devonian Seed Plant and Associated Vegetative Frond
	Wang, De-Ming ; Meng, Mei-Cen ; Guo, Yun
刊名	PLOS ONE
	2016
关键词	AFFINITIES CHINA RECONSTRUCTION PTERIDOSPERM HETERANGIUM CUPULATE SCOTLAND FERNS
DOI	10.1371/journal.pone.0147984
英文摘要	Pollen organ Telangiopsis sp., associated with but not attached to vegetative fronds, has been collected from the Upper Devonian (Famennian) Wutong Formation, Dongzhi County, Anhui Province, China. Fertile axes with terminal pollen organs are dichotomous for 2-4 times and may be proximally attached by fragmentary pinnules. Pollen organs are synangiate and borne on the top of a short stalk. Synangia are radial in symmetry and each consists of 4-8 elongate microsporangia fused at base. Microsporangia have a longitudinal dehiscence line and show a tapered apex. The associated stem is spiny and bears a vegetative frond which bifurcates once at the basalmost part. Frond rachises possess one order of pinna arranged alternately. Pinnules are borne alternately, planate, highly dissected, and equally dichotomous for 2-3 times. Comparisons among Late Devonian seed plants recognize several branching patterns in the fertile fronds/axes bearing terminal pollen organs. Telangiopsis sp. reinforces that the Late Devonian pollen organs are synangiate usually with basally fused microsporangia. It is suggested that the evolutionary divergence of radial and bilateral symmetries of pollen organs may have occurred in the Famennian, when the earliest seed plants evolved planate and sometimes laminate pinnules.; National Basic Research Program of China of the Ministry of Science and Technology of China [2012CB821900]; National Natural Science Foundation of China [41402023, 41302014]; SCI(E); PubMed; ARTICLE; dmwang@pku.edu.cn; 1; e0147984; 11
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435240]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, De-Ming,Meng, Mei-Cen,Guo, Yun. Pollen Organ Telangiopsis sp of Late Devonian Seed Plant and Associated Vegetative Frond[J]. PLOS ONE,2016.
APA	Wang, De-Ming,Meng, Mei-Cen,&Guo, Yun.(2016).Pollen Organ Telangiopsis sp of Late Devonian Seed Plant and Associated Vegetative Frond.PLOS ONE.
MLA	Wang, De-Ming,et al."Pollen Organ Telangiopsis sp of Late Devonian Seed Plant and Associated Vegetative Frond".PLOS ONE (2016).