Data from: More than iso/anisohydry: hydroscapes integrate plant water‐use and drought tolerance traits in ten eucalypt species from contrasting climates
  • Description

    The iso/anisohydric continuum describes how plants regulate leaf water potential and is commonly used to classify species drought response strategies. However, drought response strategies comprise more than just this continuum, incorporating a suite of stomatal and hydraulic traits. Using a common garden experiment, we compared and contrasted four metrics commonly used to describe water use strategy during drought in ten eucalyptus species comprising four major ecosystems in eastern Australia. We examined the degree to which these metrics were aligned with key stomatal and hydraulic traits related to plant water use and drought tolerance. Species rankings of water use strategy were inconsistent across four metrics. A newer metric (Hydroscape) was strongly linked to various plant traits, including the leaf turgor loss (TLP), water potential at stomatal closure (Pgs90), leaf and stem hydraulic vulnerability to embolism (PL50 and Px50), safety margin of hydraulic segmentation (HSMHS), maximum stomatal conductance (gsmax) and Huber value (HV). In addition, Hydroscape was correlated with climatic variables representing the water availability at the seed source site. Along the continuum of water regulation strategy, species with narrow Hydroscapes tended to occupy mesic regions and exhibit high TLP, PL50 and Px50 values and narrow HSMHS. High gsmax recorded in species with broad hydroscapes were also associated with high HV. Despite a 4‐fold difference in Hydroscape area, all species closed their stomata prior to the onset of hydraulic dysfunction, suggesting a common stomatal response across species that minimises embolism risk during drought. Hydroscape area is useful in bridging stomatal regulation, hydraulic architecture and species drought tolerance, thus providing insight into species water use strategies. Usage notes Li et al. FE-2018-01132_Raw data_1 This file contains the response of percentage loss of xylem conductivity to water potential for stem and leaf, as well as stomatal conductance response to water potential during dehydration for ten species. Li et al. FE-2018-01132_Raw data_2 This file includes predawn and midday leaf water potential for ten species during drydown.
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      Data publication title Data from: More than iso/anisohydry: hydroscapes integrate plant water‐use and drought tolerance traits in ten eucalypt species from contrasting climates
    • Description

      The iso/anisohydric continuum describes how plants regulate leaf water potential and is commonly used to classify species drought response strategies. However, drought response strategies comprise more than just this continuum, incorporating a suite of stomatal and hydraulic traits. Using a common garden experiment, we compared and contrasted four metrics commonly used to describe water use strategy during drought in ten eucalyptus species comprising four major ecosystems in eastern Australia. We examined the degree to which these metrics were aligned with key stomatal and hydraulic traits related to plant water use and drought tolerance. Species rankings of water use strategy were inconsistent across four metrics. A newer metric (Hydroscape) was strongly linked to various plant traits, including the leaf turgor loss (TLP), water potential at stomatal closure (Pgs90), leaf and stem hydraulic vulnerability to embolism (PL50 and Px50), safety margin of hydraulic segmentation (HSMHS), maximum stomatal conductance (gsmax) and Huber value (HV). In addition, Hydroscape was correlated with climatic variables representing the water availability at the seed source site. Along the continuum of water regulation strategy, species with narrow Hydroscapes tended to occupy mesic regions and exhibit high TLP, PL50 and Px50 values and narrow HSMHS. High gsmax recorded in species with broad hydroscapes were also associated with high HV. Despite a 4‐fold difference in Hydroscape area, all species closed their stomata prior to the onset of hydraulic dysfunction, suggesting a common stomatal response across species that minimises embolism risk during drought. Hydroscape area is useful in bridging stomatal regulation, hydraulic architecture and species drought tolerance, thus providing insight into species water use strategies. Usage notes Li et al. FE-2018-01132_Raw data_1 This file contains the response of percentage loss of xylem conductivity to water potential for stem and leaf, as well as stomatal conductance response to water potential during dehydration for ten species. Li et al. FE-2018-01132_Raw data_2 This file includes predawn and midday leaf water potential for ten species during drydown.
      • Data type dataset
    • Keywords
      • Angophora costata (Gaertn.) Britten
      • Drydown
      • Eucalypteae
      • Eucalyptus
      • Eucalyptus blakelyi Maiden
      • Eucalyptus grandis W. Hill
      • Eucalyptus largiflorens F. Muell.
      • Eucalyptus macrorhyncha F.Muell. ex Benth
      • Eucalyptus melliodora A.Cunn. ex Schauer
      • Eucalyptus populnea F. Muell.
      • Eucalyptus sideroxylon A.Cunn. ex Woolls
      • Eucalyptus viminalis Labill.
      • hydraulics
      • Vulnerability to embolism
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      • FoR codes
      • 310403 - Biological adaptation
      • 310806 - Plant physiology
      • 319902 - Global change biology
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      Citation Li, Ximeng; Blackman, Chris; Peters, Jennifer; Choat, Brendan; Rymer, Paul; Medlyn, Belinda; Tissue, David (2019): Data from: More than iso/anisohydry: hydroscapes integrate plant water‐use and drought tolerance traits in ten eucalypt species from contrasting climates. Western Sydney University. https://doi.org/10.5061/dryad.jt88gv0

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