Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/pce.13418 |
Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery | |
Creek, Danielle1; Blackman, Chris J.1; Brodribb, Timothy J.2; Choat, Brendan1; Tissue, David T.1 | |
通讯作者 | Creek, Danielle |
来源期刊 | PLANT CELL AND ENVIRONMENT
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ISSN | 0140-7791 |
EISSN | 1365-3040 |
出版年 | 2018 |
卷号 | 41期号:12页码:2869-2881 |
英文摘要 | The ability to resist hydraulic dysfunction in leaves, stems, and roots strongly influences whether plants survive and recover from drought. However, the coordination of hydraulic function among different organs within species and their links to gas exchange during drought and recovery remains understudied. Here, we examine the interaction between gas exchange and hydraulic function in the leaves, stems, and roots of three semiarid evergreen species exposed to a cycle of severe water stress (associated with substantial cavitation) and recovery. In all species, stomatal closure occurred at water potentials well before 50% loss of stem hydraulic conductance, while in two species, leaves and/or roots were more vulnerable than stems. Following soil rewetting, leaf-level photosynthesis (A(net)) returned to prestress levels within 2-4 weeks, whereas stomatal conductance and canopy transpiration were slower to recover. The recovery of A(net) was decoupled from the recovery of leaf, stem, and root hydraulics, which remained impaired throughout the recovery period. Our results suggest that in addition to high embolism resistance, early stomatal closure and hydraulic vulnerability segmentation confers drought tolerance in these arid zone species. The lack of substantial embolism refilling within all major organs suggests that vulnerability of the vascular system to drought-induced dysfunction is a defining trait for predicting postdrought recovery. |
英文关键词 | cavitation drought gas exchange hydraulics recovery stomatal closure vulnerability segmentation water relations |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000450337200013 |
WOS关键词 | INDUSTRIAL-AGE CHANGES ; X-RAY MICROTOMOGRAPHY ; STOMATAL CLOSURE ; VULNERABILITY SEGMENTATION ; XYLEM VULNERABILITY ; ATMOSPHERIC CO2 ; WATER-STRESS ; EMBOLISM ; CONDUCTANCE ; RESPONSES |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/212180 |
作者单位 | 1.Univ Western Sydney, Hawkesbury Inst Environm, Locked Bag 1797, Penrith, NSW 2751, Australia; 2.Univ Tasmania, Sch Biol Sci, Hobart, Tas, Australia |
推荐引用方式 GB/T 7714 | Creek, Danielle,Blackman, Chris J.,Brodribb, Timothy J.,et al. Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery[J],2018,41(12):2869-2881. |
APA | Creek, Danielle,Blackman, Chris J.,Brodribb, Timothy J.,Choat, Brendan,&Tissue, David T..(2018).Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery.PLANT CELL AND ENVIRONMENT,41(12),2869-2881. |
MLA | Creek, Danielle,et al."Coordination between leaf, stem, and root hydraulics and gas exchange in three arid-zone angiosperms during severe drought and recovery".PLANT CELL AND ENVIRONMENT 41.12(2018):2869-2881. |
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