干旱区生态环境知识资源中心(Arid): Water and nutrient relations of mistletoes at the drought limit of their hosting evergreen oaks in the semiarid upper Yangtze region, SW China

Arid

DOI	10.1007/s00468-020-02039-x
	Water and nutrient relations of mistletoes at the drought limit of their hosting evergreen oaks in the semiarid upper Yangtze region, SW China
	He, Xiao-Fang; Wang, Song-Wei; Koerner, Christian; Yang, Yang
通讯作者	Yang, Y
来源期刊	TREES-STRUCTURE AND FUNCTION
ISSN	0931-1890
EISSN	1432-2285
英文摘要	Does mistletoe infestation influence the position of the dry range limit of oaks? We explored this question and our results contrast most earlier findings on host-mistletoe interaction. The study was located in the SE Himalayas in an environment with 200-360 mm annual precipitation falling mainly during the short monsoon season (hardly any rain during 9-10 month). The hemi-parasite species (HPs)Loranthus delavayiandTaxillus thibetensisare growing onQuercus pannosas.l.at its drought-driven range limit. HPs mostly exhibited lower shoot water potentials than their hosts during both, the dry and the wet season. During the dry season, leaf conductance (g(l)) of the HPs was very low (100-200 mmol m(-2) s(-1)) and mostly lower than in their host. During the wet season, both HPs and oaks reached highg(l)(up to c. 500 mmol m(-2) s(-1)) with higher in HP or no clear differentiation. Leaf delta C-13 in HPs was lower than in the host, suggesting a small limitation of CO(2)uptake by g(l). Both HPs had higher foliage potassium (K) and phosphorus (P) and similar nitrogen (N) content than the host. Thus, counter to abundant literature, HPs consumed extra water (and dissolved nutrients) mainly during the wet season, not adding extra stress to their host trees under extreme drought. Both host trees and mistletoes track the monsoon regime, with peak activity confined to the brief moist period. Under these semi-arid conditions, mistletoes thus, do not seem to affect the drought-driven range limit of these oaks.
英文关键词	Quercus pannosa Loranthus delavayi Taxillus thibetensis Hemiparasite Monsoon climate Himalaya
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000574311100001
WOS关键词	BEHRIANA F-MUELL ; EX MIQ TIEGH ; NITROGEN RELATIONSHIPS ; LORANTHUS-EUROPAEUS ; USE EFFICIENCY ; CARBON ; PLANT ; LEAF ; TRANSPIRATION ; CONDUCTANCE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328306
作者单位	[He, Xiao-Fang; Yang, Yang] Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China; [He, Xiao-Fang] Univ Chinese Acad Sci, Beijing, Peoples R China; [Wang, Song-Wei; Koerner, Christian] Univ Basel, Inst Bot, Schonbeinstr 6, CH-4056 Basel, Switzerland
推荐引用方式 GB/T 7714	He, Xiao-Fang,Wang, Song-Wei,Koerner, Christian,et al. Water and nutrient relations of mistletoes at the drought limit of their hosting evergreen oaks in the semiarid upper Yangtze region, SW China[J].
APA	He, Xiao-Fang,Wang, Song-Wei,Koerner, Christian,&Yang, Yang.
MLA	He, Xiao-Fang,et al."Water and nutrient relations of mistletoes at the drought limit of their hosting evergreen oaks in the semiarid upper Yangtze region, SW China".TREES-STRUCTURE AND FUNCTION