Influence of frost on nutrient resorption during leaf senescence in a mangrove at its latitudinal limit of distribution

CORC > 厦门大学 > 化学化工－已发表论文

	Influence of frost on nutrient resorption during leaf senescence in a mangrove at its latitudinal limit of distribution
	Wang, Wenqing ; You, Siyang ; Wang, Yunbo ; Huang, Li ; Wang, Mao ; Huang L(黄令)
刊名	http://dx.doi.org/10.1007/s11104-010-0672-z
	2011-05
关键词	OF-MEXICO COAST RHIZOPHORA-MANGLE AVICENNIA-MARINA LAGUNCULARIA-RACEMOSA KANDELIA-CANDEL WATER RELATIONS GAS-EXCHANGE RED MANGROVE HONG-KONG NITROGEN
英文摘要	National Natural Science Foundation of China [30930017]; National Basic Research Program of China [2009CB426306]; National Special Research Programs for Non-Profit Trades [200805072]; The latitudinal distribution of mangrove species is limited mainly by low temperature. Leaf scorch and massive leaf fall are the predominant symptoms of frost damage. Nutrient resorption during leaf senescence is an important adaptation mechanism of mangroves. Abnormal defoliation disturbs nutrient resorption. We evaluated the effects of frost on nutrient loss of mangroves and the protective effects of warmer seawater inundation on reducing nutrient loss. On January 14, 2009, the most cold-tolerant mangrove Kandelia obovata at its naturally latitudinal limit (Fuding, China, 27A degrees 17'N) was exposed to freezing temperature (-2.4A degrees C) for 4 h (minimum -2.8A degrees C). The freezing air temperature occurred during flood tide, resulting that the flooded shoots were protected by warmer seawater. Frost caused 31.3% and 13.0% defoliation on the exposed shoots and the flooded shoots, respectively. Frost restricted nutrient resorption during leaf senescence. K. obovata resorbed 61% N and 42% P during normal leaf senescence, respectively. However, frost-damaged leaves only resorbed 13% N and 10% P during the course, respectively. Foliar N:P molar ratios were < 31, suggesting N limitation. Tidal inundation can partially protect mangroves from frost damage. Reduced nutrient resorption efficiency and massive leaf fall caused by frost add pressure to mangroves under nutrient limitation at their latitudinal limits.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/64362]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wang, Wenqing,You, Siyang,Wang, Yunbo,et al. Influence of frost on nutrient resorption during leaf senescence in a mangrove at its latitudinal limit of distribution[J]. http://dx.doi.org/10.1007/s11104-010-0672-z,2011.
APA	Wang, Wenqing,You, Siyang,Wang, Yunbo,Huang, Li,Wang, Mao,&黄令.(2011).Influence of frost on nutrient resorption during leaf senescence in a mangrove at its latitudinal limit of distribution.http://dx.doi.org/10.1007/s11104-010-0672-z.
MLA	Wang, Wenqing,et al."Influence of frost on nutrient resorption during leaf senescence in a mangrove at its latitudinal limit of distribution".http://dx.doi.org/10.1007/s11104-010-0672-z (2011).