气候变化领域集成服务门户(CCPortal): Whole-plant water hydraulic integrity to predict drought-induced Eucalyptus urophylla mortality under drought stress

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DOI	10.1016/j.foreco.2020.118179
	Whole-plant water hydraulic integrity to predict drought-induced Eucalyptus urophylla mortality under drought stress
	Chen X.; Zhao P.; Ouyang L.; Zhu L.; Ni G.; Schäfer K.V.R.
发表日期	2020
ISSN	0378-1127
卷号	468
英文摘要	Drought-driven tree mortality has been occurring globally and been investigated by many researchers. Yet, while subtropical forests of southern China are predicted to experience an increased frequency and intensity of climate change‐induced drought events in the near future, there still a big knowledge gap in our understanding of the physiological vulnerability of Eucalyptus urophylla S.T. Blake under drought stress. In this study, E. urophylla was selected both for field and greenhouse experiments under controlled soil water conditions. We investigated whole-plant hydraulic conductivity (Kplant), sap flow density (Js), leaf photosynthetic characteristics and non-structural carbohydrates (NSC) to explore how E. urophylla species responded to drought from the perspective of hydraulic and carbon dynamics. Results showed that the percentage loss of stem xylem hydraulic conductance (PLC) caused by drought was up to 84.4%. Both Kplant and Js significantly decreased with the decline of the soil water availability. Also, the interaction of hydraulic conductivity to stomatal conductance was more sensitive under drought. In addition, drought-induced decline of total NSC content in leaf and stem tissue was not distinct. A conversion of starch to soluble sugar was found under drought stress. Our findings suggested that hydraulic failure could be a major threat to the survival of E. urophylla species under drought stress due to a high xylem embolism vulnerability, which improves prediction of the response of E. urophylla species to future climate changes. © 2020 Elsevier B.V.
英文关键词	Drought stress; Eucalyptus urophylla; Hydraulic failure; Non-structural carbohydrates; Tree mortality
语种	英语
scopus关键词	Climate change; Forestry; Hydraulic conductivity; Plants (botany); Soil moisture; Greenhouse experiments; Hydraulic conductance; Hydraulic failure; Non-structural carbohydrates; Photosynthetic characteristics; Soil water availability; Stomatal conductance; Subtropical forests; Drought; climate change; drought stress; evergreen tree; hydraulic conductivity; mortality; prediction; sap flow; soil water; starch; stem; stomatal conductance; subtropical region; sugar; vulnerability; xylem; Conductivity; Drought; Eucalyptus Urophylla; Forestry; Stresses; Vulnerability; China; Eucalyptus urophylla
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155240
作者单位	Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; Center for Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, 510650, China; Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China; University of Chinese Academy of Sciences, Beijing, 101408, China; Department of Biological Sciences, Rutgers University, 195 University Avenue, Newark, NJ 07102, United States; Department of Earth and Environmental Sciences, Rutgers University, 195 University Avenue, Newark, NJ 07102, United States
推荐引用方式 GB/T 7714	Chen X.,Zhao P.,Ouyang L.,et al. Whole-plant water hydraulic integrity to predict drought-induced Eucalyptus urophylla mortality under drought stress[J],2020,468.
APA	Chen X.,Zhao P.,Ouyang L.,Zhu L.,Ni G.,&Schäfer K.V.R..(2020).Whole-plant water hydraulic integrity to predict drought-induced Eucalyptus urophylla mortality under drought stress.Forest Ecology and Management,468.
MLA	Chen X.,et al."Whole-plant water hydraulic integrity to predict drought-induced Eucalyptus urophylla mortality under drought stress".Forest Ecology and Management 468(2020).