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A unique gymnosperm from the latest Permian of China, and its ecophysiological implications
Feng, Zhuo1,2,3; Wang, Jun (王军)2; Roessler, Ronny3
2011-05-01
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume165Issue:1-2Pages:27-40
Abstract

A unique coniferous woody stem Shenoxylon mirabile gen. nov. et sp. nov. is described from the very late late Permian Changhsingian (Lopingian) Sunjiagou Formation of the Shitanjing coalfield, northern China. The silicified decorticated stem is characterized by a complex pith in the broad (7 mm) eustelic vascular system, thick secondary xylem cylinder and helically arranged leaf traces. The heterogeneous pith consists of a densely arranged sclerified intramedullary sheath that separates the loosely arranged central parenchyma and peripheral sclerified cells into three prominent zones. The primary xylem strands show endarch maturation, the tracheids from the protoxylem to metaxylem showing annular to scalariform/reticulate thickenings. The secondary xylem is pycnoxylic; uniseriate bordered pits are continuous or individually spaced on the radial walls of tracheids, with partially biseriate, alternate or occasionally opposite; the cross-fields show one or two cupressoid pits; ray cells are parenchymatous with smooth walls; axial parenchyma is developed. Growth-rings are present and false rings are frequently developed throughout the secondary xylem; resin canals are absent. The leaf traces are composed of monarch vascular bundles and of circular to longitudinally elongate shape in cross section; they originate from the periphery of the pith and pass through the whole xylem cylinder nearly horizontally. The frequent occurrences of false rings are interpreted as ecophysiological responses of the plant to the environmental turbulences during the latest Permian terrestrial ecosystem. (C) 2011 Elsevier B.V. All rights reserved.

KeywordShenoxylon Mirabile Gen. Nov Et Sp Nov. Intramedullary Sheath End-permian Mass Extinction Ecophysiological Response China
DOI10.1016/j.revpalbo.2011.02.002
Language英语
WOS KeywordFalse Ring Formation ; Triassic Boundary ; North China ; Palynological Record ; Ecological Crisis ; Mass Extinction ; Shanxi Province ; Fungal Event ; Magnetostratigraphy ; Biostratigraphy
Funding ProjectCAS[KZCX2-EW-120] ; National Natural Science Foundation of China[40902009] ; National Natural Science Foundation of China[40872027] ; National Natural Science Foundation of China[41072010] ; National Natural Science Foundation of China[40621062] ; Specialized Research Fund for the Doctoral Program of Higher Education[20095301120003] ; State Key Laboratory of Palaeobiology and Stratigraphy (NIGPAS)[093108] ; Science and Technology Department of Yunnan Province[2008CD074]
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000290893900003
Funding OrganizationCAS ; National Natural Science Foundation of China ; Specialized Research Fund for the Doctoral Program of Higher Education ; State Key Laboratory of Palaeobiology and Stratigraphy (NIGPAS) ; Science and Technology Department of Yunnan Province
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/455
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorFeng, Zhuo
Affiliation1.Yunnan Univ, Yunnan Key Lab Palaeobiol, Kunming 650091, Peoples R China
2.CAS, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
3.Museum Nat Kunde, D-09111 Chemnitz, Germany
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Feng, Zhuo,Wang, Jun ,Roessler, Ronny. A unique gymnosperm from the latest Permian of China, and its ecophysiological implications[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2011,165(1-2):27-40.
APA Feng, Zhuo,Wang, Jun ,&Roessler, Ronny.(2011).A unique gymnosperm from the latest Permian of China, and its ecophysiological implications.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,165(1-2),27-40.
MLA Feng, Zhuo,et al."A unique gymnosperm from the latest Permian of China, and its ecophysiological implications".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 165.1-2(2011):27-40.
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