Effects of Drought and Warming on Biomass, Nutrient Allocation, and   Oxidative Stress in Abies fabri in Eastern Tibetan Plateau

doi:10.1007/s00344-012-9298-0

CORC > 北京大学 > 城市与环境学院

	Effects of Drought and Warming on Biomass, Nutrient Allocation, and Oxidative Stress in Abies fabri in Eastern Tibetan Plateau
	Yang, Yan ; Wang, Genxu ; Yang, Liudong ; Guo, Jianying
刊名	journal of plant growth regulation
	2013
关键词	Abies fabri Biomass Membrane damage Nutrient allocation Stoichiometric traits CLIMATE-CHANGE WATER-STRESS NITROGEN CONCENTRATION USE EFFICIENCY WHITE SPRUCE ELEVATED CO2 GROWTH TEMPERATURE RESPONSES SEEDLINGS
DOI	10.1007/s00344-012-9298-0
英文摘要	Abies fabri (Mast.) Craib is an endemic and dominant species in typical subalpine dark coniferous forests distributed in the eastern Tibetan Plateau. To assess how A. fabri may respond and adapt to future climate changes, we investigated the effects of drought and warming on the growth, resource allocation in biomass, membrane stability, and oxidative stress of the seedlings over two growing seasons. Drought (11.4 % average reduction in soil moisture) was created by excluding natural precipitation with a plastic roof and warming was performed by an infrared heater above the plots. Drought increased root length, the root-to-shoot ratio, N concentration, and N/P ratio in all organs, and decreased seedling height and C/N ratio in all organs. Moreover, warming (2 A degrees C) decreased seedling height, root length, total biomass, and N concentration in stems but increased the C/N ratio. Furthermore, the combination of drought and warming decreased seedling height and biomass in all organs, which further increased the N concentration and N/P ratio in all organs. A significant decrease in the membrane stability index and an increase in malondialdehyde, superoxide radical (O-2 (-)), and hydrogen peroxide (H2O2) were exactly matched with a dramatic decrease of total biomass under the combination of drought and warming treatment. Together these results implied that drought alone and warming alone were unfavorable for the early growth of A. fabri, and drought plus warming will intensify the opposite effect of drought alone or warming alone. Moreover, N will be a limited nutrient under extant and future climate changes.; Plant Sciences; SCI(E); 5; ARTICLE; 2; 298-306; 32
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160975]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Yang, Yan,Wang, Genxu,Yang, Liudong,et al. Effects of Drought and Warming on Biomass, Nutrient Allocation, and Oxidative Stress in Abies fabri in Eastern Tibetan Plateau[J]. journal of plant growth regulation,2013.
APA	Yang, Yan,Wang, Genxu,Yang, Liudong,&Guo, Jianying.(2013).Effects of Drought and Warming on Biomass, Nutrient Allocation, and Oxidative Stress in Abies fabri in Eastern Tibetan Plateau.journal of plant growth regulation.
MLA	Yang, Yan,et al."Effects of Drought and Warming on Biomass, Nutrient Allocation, and Oxidative Stress in Abies fabri in Eastern Tibetan Plateau".journal of plant growth regulation (2013).