Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11284-016-1396-1 |
Contrasting hydraulic strategies in Salix psammophila and Caragana korshinskii in the southern Mu Us Desert, China | |
Li, Yangyang1; Chen, Weiyue2; Chen, Jiacun1; Shi, Hui3 | |
通讯作者 | Li, Yangyang |
来源期刊 | ECOLOGICAL RESEARCH
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ISSN | 0912-3814 |
EISSN | 1440-1703 |
出版年 | 2016 |
卷号 | 31期号:6页码:869-880 |
英文摘要 | Salix psammophila and Caragana korshinskii are two common shrubs in the southern Mu Us Desert, China. Their hydraulic strategies for adapting to this harsh, dry desert environment are not yet clear. This study examined the hydraulic transport efficiency, vulnerability to cavitation, and daily embolism refilling in the leaves and stems of these two shrubs during the dry season. In order to gain insight into water use strategies of whole plants, other related traits were also considered, including daily changes in stomatal conductance, leaf mass per area, leaf pressure-volume parameters, wood density and the Huber value. The leaves and stems of S. psammophila had greater hydraulic efficiency, but were more vulnerable to drought-induced hydraulic dysfunction than C. korshinskii. The difference between leaf and stem water potential at 50 % loss of conductivity was 0.12 MPa for S. psammophila and 0.81 MPa for C. korshinskii. Midday stomatal conductance decreased by 74 % compared to that at 8:30 in S. psammophila, whereas no change occurred in C. korshinskii. Daily embolism and refilling occurred in the stems of S. psammophila and leaves of C. korshinskii. These results suggest that a stricter stomatal regulation, daily embolism repair in stems, and a higher stem water capacitance could be partially compensating for the greater susceptibility to xylem embolism in S. psammophila, whereas higher leaf elastic modulus, greater embolism resistance in stems, larger difference between leaf and stem hydraulic safety, and drought-induced leaf shedding in C. korshinskii were largely responsible for its more extensive distribution in arid and desert steppes. |
英文关键词 | Cavitation Daily embolism and refilling Hydraulic conductivity Safety margin Shrubs |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000387344900011 |
WOS关键词 | CAVITATION RESISTANCE ; STOMATAL CONDUCTANCE ; WOODY-PLANTS ; WATER-STATUS ; XYLEM VULNERABILITY ; DROUGHT RESISTANCE ; LEAF HYDRAULICS ; EMBOLISM REPAIR ; SAFETY MARGINS ; RAIN-FOREST |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 西北农林科技大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192448 |
作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China; 2.Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China; 3.Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yangyang,Chen, Weiyue,Chen, Jiacun,et al. Contrasting hydraulic strategies in Salix psammophila and Caragana korshinskii in the southern Mu Us Desert, China[J]. 西北农林科技大学,2016,31(6):869-880. |
APA | Li, Yangyang,Chen, Weiyue,Chen, Jiacun,&Shi, Hui.(2016).Contrasting hydraulic strategies in Salix psammophila and Caragana korshinskii in the southern Mu Us Desert, China.ECOLOGICAL RESEARCH,31(6),869-880. |
MLA | Li, Yangyang,et al."Contrasting hydraulic strategies in Salix psammophila and Caragana korshinskii in the southern Mu Us Desert, China".ECOLOGICAL RESEARCH 31.6(2016):869-880. |
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