Changes of condensed tannins during decomposition of leaves of Kandelia obovata in a subtropical mangrove swamp in China

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	Changes of condensed tannins during decomposition of leaves of Kandelia obovata in a subtropical mangrove swamp in China
	Zhou, Hai-Chao ; Tam, Nora Fung-yee ; Lin, Yi-Ming ; Wei, Shu-Dong ; Li, Yuan-Yue ; Lin YM(林益明)
刊名	http://dx.doi.org/10.1016/j.soilbio.2011.09.015
	2012-01
关键词	ANTIOXIDANT ACTIVITY POLYMERIC PROCYANIDINS RHIZOPHORA-MANGLE NUTRIENT DYNAMICS TROPICAL ESTUARY ALASKAN TAIGA ECOSYSTEMS LITTER CANDEL SOIL
英文摘要	National Eleventh Five-Year Key Project; National Natural Science Foundation of China; Program for New Century Excellent Talents in University; Kandelia obovata, with abundant condensed tannins (CTs), is a typical mangrove species in China, but little is known about the chemical alterations and ecological roles of CTs during leaf litter decomposition. A litterbag experiment was conducted to investigate the changes of CTs in a subtropical mangrove swamp along Zhangjiang River Estuary, China, using the colorimetric assays, reversed/normal-phase HPLC-ESI-MS and MALDI-TOF-MS techniques. Total phenolics (TP), extractable CTs (ECT) and total CTs (TCT) decreased rapidly, while bound CTs (BCT), including protein- and fibre-bound CTs in leaves, increased during decomposition, and these temporal changes were well-expressed by exponential functions. Negative correlations between nitrogen (N) and TP, as well as N and ECT were found; however, a positive correlation between N and BCT was detected, suggesting that CTs played an important role in humification during N immobilization. The HPLC-ESI-MS analyses showed that the polymerization degree of CTs had an initial increase, due to leaching, followed by a decrease in the subsequent shift towards abiotic or/and biotic degradation. MALDI-TOF-MS confirmed the degradation processes for CTs. A decrease in the degree of hydroxylation, along with an increase in glycosylation-CTs, was obtained during litter decomposition. These chemical changes enhanced the current knowledge on the potential ecological role of N transformation in CTs in mangrove swamps. (C) 2011 Elsevier Ltd. All rights reserved.
语种	英语
出版者	SOIL BIOL BIOCHEM
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/90575]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Zhou, Hai-Chao,Tam, Nora Fung-yee,Lin, Yi-Ming,et al. Changes of condensed tannins during decomposition of leaves of Kandelia obovata in a subtropical mangrove swamp in China[J]. http://dx.doi.org/10.1016/j.soilbio.2011.09.015,2012.
APA	Zhou, Hai-Chao,Tam, Nora Fung-yee,Lin, Yi-Ming,Wei, Shu-Dong,Li, Yuan-Yue,&林益明.(2012).Changes of condensed tannins during decomposition of leaves of Kandelia obovata in a subtropical mangrove swamp in China.http://dx.doi.org/10.1016/j.soilbio.2011.09.015.
MLA	Zhou, Hai-Chao,et al."Changes of condensed tannins during decomposition of leaves of Kandelia obovata in a subtropical mangrove swamp in China".http://dx.doi.org/10.1016/j.soilbio.2011.09.015 (2012).