Arid
DOI10.1111/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.
Corresponding AuthorBlasini, DE (corresponding author),Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA.
JournalPLANT CELL AND ENVIRONMENT
ISSN0140-7791
EISSN1365-3040
Year Published2022-03
Abstract in EnglishLeaf 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.
Keyword in Englisharid land riparian ecosystem experimental common garden Fremont cottonwood leaf economic traits leaf temperature stem sap flux stomatal conductance
SubtypeArticle ; Early Access
Language英语
Indexed BySCI-E
WOS IDWOS:000762965700001
WOS KeywordPLANT ECONOMICS SPECTRUM ; STOMATAL CONDUCTANCE ; SAP FLOW ; TEMPERATURE RESPONSES ; THERMAL-ACCLIMATION ; GAS-EXCHANGE ; RESPIRATION ; PRESSURE ; TRAITS ; SIZE
WOS SubjectPlant Sciences
WOS Research AreaPlant Sciences
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/377380
Affiliation[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
Recommended Citation
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).
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