Anatomy of Stigmaria asiatica Jongmans et Gothan from the Asselian (lowermost Permian) of Wuda Coalfield, Inner Mongolia, North China

doi:10.1016/j.palwor.2021.05.001

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	Anatomy of Stigmaria asiatica Jongmans et Gothan from the Asselian (lowermost Permian) of Wuda Coalfield, Inner Mongolia, North China
	Chen, Bi-Yun ; Wan, Ming-Li ; Zhou, Wei-Ming ; Wang, Shi-Jun ; Wang, Jun 4
刊名	PALAEOWORLD
	2022
卷号	31 期号:2 页码:311-323
关键词	Stigmaria Brongniart Rooting system Axes Rootlet Cathaysia
ISSN号	1871-174X
DOI	10.1016/j.palwor.2021.05.001
文献子类	Article
英文摘要	Stigmaria asiatica Jongmans et Gothan is a common species from the Permo-Carboniferous of East Asia. It is characterized by a relatively slender rhizomorph and represents the underground rooting system of lowland arborescent lycopsids. This species from the Wuda Coalfield (Asselian, lower Permian) represents the recovery taxon dominating the subsequent peat-forming vegetation after a volcanic eruption destroyed the previous flora, termed the Wuda Tuff Flora (Chinese vegetational Pompeii ). It is characterized by novel downward axes, probably for access to deeper groundwater. Here, the anatomy of S. asiatica , including that of the axes and rootlets, is reported in detail for the first time. The axis contains stelar tissues, including pith, primary and secondary xylem, and phloem, and both primary and secondary cortical tissues. The primary cortex is tripartite and is divided into inner, middle, and outer zones. Secondary cortex is produced in the interior of the outer cortex splitting the outer cortex into inner and outer portions. The homogeneous pith and mesarch primary xylem maturation of S. asiatica are different from previously recorded species of Stigmaria Brongniart. Rootlets are composed of a central monarch vascular bundle surrounded by inner cortex and a ring of outer cortex. A vacant region is present between the inner and outer cortices. In some cases, connectives between the inner and outer cortices are present. According to the presented statistical analysis, it is proposed that rootlets of S. asiatica were highly branched, with at least for 7 bifurcations. Rootlets, together with the downward penetrating rhizomorph, helped to both anchor the plant and search for and absorb deep groundwater. (C) 2021 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
学科主题	Paleontology
电子版国际标准刊号	1875-5887
出版地	AMSTERDAM
WOS关键词	ARBORESCENT LYCOPSIDS ; BRONGNIART
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000797337200004
资助机构	Strategic Priority Research Program (B) of the Chinese Academy of Sciences [XDB18000000, XDB26000000, 41872013, 41702024, 41530101] ; Youth Innova-tion Promotion Association CAS [2020312] ; Youth Innova-tion Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28587]
专题	系统与进化植物学国家重点实验室
作者单位	1.Inst Bot, Chinese Acad Sci, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Nanjing Inst Geol & Palaeontol, Chinese Acad Sci, Ctr Excellence Life & Paleoenvironment, Dept Palaeobotany & Palynol, Nanjing 210008, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Chen, Bi-Yun,Wan, Ming-Li,Zhou, Wei-Ming,et al. Anatomy of Stigmaria asiatica Jongmans et Gothan from the Asselian (lowermost Permian) of Wuda Coalfield, Inner Mongolia, North China[J]. PALAEOWORLD,2022,31(2):311-323.
APA	Chen, Bi-Yun,Wan, Ming-Li,Zhou, Wei-Ming,Wang, Shi-Jun,&Wang, Jun.(2022).Anatomy of Stigmaria asiatica Jongmans et Gothan from the Asselian (lowermost Permian) of Wuda Coalfield, Inner Mongolia, North China.PALAEOWORLD,31(2),311-323.
MLA	Chen, Bi-Yun,et al."Anatomy of Stigmaria asiatica Jongmans et Gothan from the Asselian (lowermost Permian) of Wuda Coalfield, Inner Mongolia, North China".PALAEOWORLD 31.2(2022):311-323.