干旱区生态环境知识资源中心(Arid): Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species

Arid

DOI	10.1111/pce.14292
	Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species
	Blasini, Davis E.; Koepke, Dan F.; Bush, Susan E.; Allan, Gerard J.; Gehring, Catherine A.; Whitham, Thomas G.; Day, Thomas A.; Hultine, Kevin R.
通讯作者	Blasini, DE (corresponding author)，Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA.
来源期刊	PLANT CELL AND ENVIRONMENT
ISSN	0140-7791
EISSN	1365-3040
出版年	2022-03
英文摘要	Leaf carbon gain optimization in hot environments requires balancing leaf thermoregulation with avoiding excessive water loss via transpiration and hydraulic failure. The tradeoffs between leaf thermoregulation and transpirational water loss can determine the ecological consequences of heat waves that are increasing in frequency and intensity. We evaluated leaf thermoregulation strategies in warm- (>40 degrees C maximum summer temperature) and cool-adapted (<40 degrees C maximum summer temperature) genotypes of the foundation tree species, Populus fremontii, using a common garden near the mid-elevational point of its distribution. We measured leaf temperatures and assessed three modes of leaf thermoregulation: leaf morphology, midday canopy stomatal conductance and stomatal sensitivity to vapour pressure deficit. Data were used to parameterize a leaf energy balance model to estimate contrasts in midday leaf temperature in warm- and cool-adapted genotypes. Warm-adapted genotypes had 39% smaller leaves and 38% higher midday stomatal conductance, reflecting a 3.8 degrees C cooler mean leaf temperature than cool-adapted genotypes. Leaf temperatures modelled over the warmest months were on average 1.1 degrees C cooler in warm- relative to cool-adapted genotypes. Results show that plants adapted to warm environments are predisposed to tightly regulate leaf temperatures during heat waves, potentially at an increased risk of hydraulic failure.
英文关键词	arid land riparian ecosystem experimental common garden Fremont cottonwood leaf economic traits leaf temperature stem sap flux stomatal conductance
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000762965700001
WOS关键词	PLANT ECONOMICS SPECTRUM ; STOMATAL CONDUCTANCE ; SAP FLOW ; TEMPERATURE RESPONSES ; THERMAL-ACCLIMATION ; GAS-EXCHANGE ; RESPIRATION ; PRESSURE ; TRAITS ; SIZE
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/2XILL650/377380
作者单位	[Blasini, Davis E.; Day, Thomas A.] Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA; [Koepke, Dan F.; Bush, Susan E.; Hultine, Kevin R.] Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ USA; [Allan, Gerard J.; Gehring, Catherine A.; Whitham, Thomas G.] No Arizona Univ, Ctr Adaptable Western Landscapes, Flagstaff, AZ 86011 USA; [Allan, Gerard J.; Gehring, Catherine A.; Whitham, Thomas G.] No Arizona Univ, Dept Biol Sci, Box 5640, Flagstaff, AZ 86011 USA
推荐引用方式 GB/T 7714	Blasini, Davis E.,Koepke, Dan F.,Bush, Susan E.,et al. Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species[J],2022.
APA	Blasini, Davis E..,Koepke, Dan F..,Bush, Susan E..,Allan, Gerard J..,Gehring, Catherine A..,...&Hultine, Kevin R..(2022).Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species.PLANT CELL AND ENVIRONMENT.
MLA	Blasini, Davis E.,et al."Tradeoffs between leaf cooling and hydraulic safety in a dominant arid land riparian tree species".PLANT CELL AND ENVIRONMENT (2022).