Wood decay of Xenoxylon yunnanensis Feng sp nov from the Middle Jurassic of Yunnan Province, China

doi:10.1016/j.palaeo.2015.05.021

	Wood decay of Xenoxylon yunnanensis Feng sp nov from the Middle Jurassic of Yunnan Province, China
	Feng, Zhuo 1,2; Wei, Hai-Bo 1; Wang, Chun-Ling 3; Chen, Yu-Xuan 1; Shen, Jia-Jia 1; Yang, Ji-Yuan 1
	2015-09-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	433 页码:60-70
摘要	A permineralised gymnosperm wood, Xenoxylon yunnanensis Feng sp. nov., is described from the Middle Jurassic Shaximiao Formation in Huize County, Yunnan Province, Southwest China. The pycnoxylic wood consists of thick-walled tracheids and thin-walled rays. It is characterised by uniseriate, contiguous, compressed bordered pits on the radial walls of tracheids, and one large simple pit in each cross-field. Growth rings exhibit narrow late-wood. The mean sensitivity of analysis of 25 growth rings is 0.2, suggesting that a climate with abundant rainfall and weak seasonality could have prevailed in Yunnan, at least locally, during the Middle Jurassic. The outer portion of the wood is largely decayed, and shows poorly preserved cells lacking details. Decayed tracheids displaying various features, including removal of middle lamellae, separations of secondary walls, presence of thickened corners and appositions, are recognised as cell reactions to fungal activity. Irregularly distributed micro-cavities are formed by complete decomposition of tracheids and rays in the wood. Abundant fungal remains occurring in the wood generally consist of multiple branched hyphae. These fungal hyphae are either confined to individual cell lumens or extend through adjacent cells. Although the probable reproductive structure and typical clamp connection are very rarely observed with few septate hyphae, the affinities of these fungal hyphae are somewhat obscure. Nevertheless, our study sheds light on the palaeoecology of Middle Jurassic terrestrial ecosystems of Southwest China. (C) 2015 Elsevier B.V. All rights reserved.
关键词	Fossil wood Saprophytic Xenoxylon yunnanensis Feng Plant-fungal interaction Jurassic
DOI	10.1016/j.palaeo.2015.05.021
语种	英语
关键词[WOS]	GENUS XENOXYLON ; FOSSIL WOOD ; PALEOCLIMATIC IMPLICATIONS ; CLAMP CONNECTIONS ; LIAONING PROVINCE ; ALEXANDER ISLAND ; PALEOZOIC FUNGI ; GROWTH RINGS ; TREE GROWTH ; ANTARCTICA
资助项目	National Basic Research Program of China (973 Program)[2012CB821901] ; National Natural Science Foundation of China[41172006] ; National Natural Science Foundation of China[41422201] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS[133104] ; Program for Excellent Young Talents, Yunnan University
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000358466400005
项目资助者	National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS ; Program for Excellent Young Talents, Yunnan University
出版者	ELSEVIER SCIENCE BV
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/11972
专题	中国科学院南京地质古生物研究所
通讯作者	Feng, Zhuo
作者单位	1.Yunnan Univ, Yunnan Key Lab Palaeobiol, Kunming 650091, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 3.Yuxi Museum, Yuxi 653100, Peoples R China
第一作者单位	中国科学院南京地质古生物研究所
通讯作者单位	中国科学院南京地质古生物研究所
推荐引用方式 GB/T 7714	Feng, Zhuo,Wei, Hai-Bo,Wang, Chun-Ling,et al. Wood decay of Xenoxylon yunnanensis Feng sp nov from the Middle Jurassic of Yunnan Province, China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2015,433:60-70.
APA	Feng, Zhuo,Wei, Hai-Bo,Wang, Chun-Ling,Chen, Yu-Xuan,Shen, Jia-Jia,&Yang, Ji-Yuan.(2015).Wood decay of Xenoxylon yunnanensis Feng sp nov from the Middle Jurassic of Yunnan Province, China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,433,60-70.
MLA	Feng, Zhuo,et al."Wood decay of Xenoxylon yunnanensis Feng sp nov from the Middle Jurassic of Yunnan Province, China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 433(2015):60-70.