Sensitivity of stomatal conductance to vapor pressure deficit and its dependence on leaf water relations and wood anatomy in nine canopy tree species in a Malaysian wet tropical rainforest

Tsuji, Shoko; Nakashizuka, T.; Kuraji, Koichiro; Kume, Atsushi; Hanba, Yuko T.

doi:10.1007/s00468-020-01998-5

Cited by 9 publications

(7 citation statements)

References 45 publications

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“…Thus, the mean sensitivity of g s to VPD (i.e., m = −0.082) might be interpreted as maximum values expressed by the species under the environmental conditions assessed and not conditioned by leaf water potentials. Differences in stomatal sensitivity to VPD have been found mainly between species [18,19,25], but some evidence has shown genetic differentiation within a species [52], which was not the case in this study. Compared with other studies, our data exhibited great variation of g s across the VPD range.…”

Section: Discussioncontrasting

confidence: 81%

“…Without consideration of the soil water availability, plant water status depends on the evaporative demand, and stomata respond to the temporal variation in VPD [ 18 ], affecting carbon assimilation and plant growth. Stomatal conductance ( g s ) typically decreases with increased VPD, and the magnitude of the decline (i.e., the slope of the relationship) is termed ‘stomatal sensitivity’ [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Stomatal sensitivity to VPD has been shown to be directly related to g s at low VPD (i.e., g ref ) [ 19 , 20 ]. Some studies have shown differences in stomatal sensitivity to VPD between and within plant species [ 18 , 21 , 22 , 23 ], whereas others have not [ 24 ]. Overall, higher stomatal sensitivity to VPD has been found in species from humid climate origins compared with those from arid climate origins and associated with warmer temperatures [ 23 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Limited Phenotypic Variation in Vulnerability to Cavitation and Stomatal Sensitivity to Vapor Pressure Deficit among Clones of Aristotelia chilensis from Different Climatic Origins

Yáñez

Urzua

Espinoza

et al. 2021

Plants

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Aristotelia chilensis (Molina) Stuntz is a promising species in the food industry as it provides ‘super fruits’ with remarkable antioxidant activity. However, under the predicted climate change scenario, the ongoing domestication of the species must consider selecting the most productive genotypes and be based on traits conferring drought tolerance. We assessed the vulnerability to cavitation and stomatal sensitivity to vapor pressure deficit (VPD) in A. chilensis clones originated from provenances with contrasting climates. A nursery experiment was carried out for one growing season on 2-year-old potted plants. Measurements of stomatal conductance (gs) responses to VPD were taken in spring, summer, and autumn, whereas vulnerability to cavitation was evaluated at the end of spring. Overall, the vulnerability to cavitation of the species was moderate (mean P50 of −2.2 MPa). Parameters of the vulnerability curves (Kmax, P50, P88, and S50) showed no differences among clones or when northern and southern clones were compared. Moreover, there were no differences in stomatal sensitivity to VPD at the provenance or the clonal level. However, compared with other studies, the stomatal sensitivity was considered moderately low, especially in the range of 1 to 3 kPa of VPD. The comparable performance of genotypes from contrasting provenance origins suggests low genetic variation for these traits. Further research must consider testing on diverse environmental conditions to assess the phenotypic plasticity of these types of traits.

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Section: Discussioncontrasting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Limited Phenotypic Variation in Vulnerability to Cavitation and Stomatal Sensitivity to Vapor Pressure Deficit among Clones of Aristotelia chilensis from Different Climatic Origins

Yáñez

Urzua

Espinoza

et al. 2021

Plants

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“…The t test revealed a significant (p = 0.008) difference in average daily spruce needle Hg uptake rates between the two clusters for a VPD threshold value of 3 kPa and non-significant (p > 0.05) differences for all other VPD threshold values. The timing and degree of stomatal closure during dry conditions is specific to tree species (Zweifel et al, 2009;Tsuji et al, 2020). Tree species like pine and spruce are isohydric; i.e., they tend to respond to drought stress under high evaporative demand by closing their stomata earlier than anisohydric species like beech and oak (Martínez-Ferri et al, 2000;Zweifel et al, 2007;Carnicer et al, 2013;Coll et al, 2013;Cárcer et al, 2018).…”

Section: Foliar Hg Uptake and Water Vapor Pressure Deficit (Vpd)mentioning

confidence: 99%

Physiological and climate controls on foliar mercury uptake by European tree species

et al. 2022

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Abstract. Despite the importance of vegetation uptake of atmospheric gaseous elemental mercury (Hg(0)) within the global Hg cycle, little knowledge exists on the physiological, climatic, and geographic factors controlling stomatal uptake of atmospheric Hg(0) by tree foliage. We investigate controls on foliar stomatal Hg(0) uptake by combining Hg measurements of 3569 foliage samples across Europe with data on tree species' traits and environmental conditions. To account for foliar Hg accumulation over time, we normalized foliar Hg concentration over the foliar life period from the simulated start of the growing season to sample harvest. The most relevant parameter impacting daily foliar stomatal Hg uptake was tree functional group (deciduous versus coniferous trees). On average, we measured 3.2 times higher daily foliar stomatal Hg uptake rates in deciduous leaves than in coniferous needles of the same age. Across tree species, for foliage of beech and fir, and at two out of three forest plots with more than 20 samples, we found a significant (p<0.001) increase in foliar Hg values with respective leaf nitrogen concentrations. We therefore suggest that foliar stomatal Hg uptake is controlled by tree functional traits with uptake rates increasing from low to high nutrient content representing low to high physiological activity. For pine and spruce needles, we detected a significant linear decrease in daily foliar stomatal Hg uptake with the proportion of time during which water vapor pressure deficit (VPD) exceeded the species-specific threshold values of 1.2 and 3 kPa, respectively. The proportion of time within the growing season during which surface soil water content (ERA5-Land) in the region of forest plots was low correlated negatively with foliar Hg uptake rates of beech and pine. These findings suggest that stomatal uptake of atmospheric Hg(0) is inhibited under high VPD conditions and/or low soil water content due to the regulation of stomatal conductance to reduce water loss under dry conditions. Other parameters associated with forest sampling sites (latitude and altitude), sampled trees (average age and diameter at breast height), or regional satellite-observation-based transpiration product (Global Land Evaporation Amsterdam Model: GLEAM) did not significantly correlate with daily foliar Hg uptake rates. We conclude that tree physiological activity and stomatal response to VPD and soil water content should be implemented in a stomatal Hg model to assess future Hg cycling under different anthropogenic emission scenarios and global warming.

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“…We excluded Douglas fir, fir, hornbeam and larch from the regression analysis due to a low number of forest plots (n = 1 -5). The timing and degree of stomatal closure during dry conditions is tree species-specific (Zweifel et al, 2009;Tsuji et al, 2020). Tree species like pine and spruce are isohydric, i.e.…”

Section: Foliar Hg Uptake and Vapor Pressure Deficit (Vpd)mentioning

confidence: 99%

Comment on bg-2021-239

Driscoll¹

2021

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Sensitivity of stomatal conductance to vapor pressure deficit and its dependence on leaf water relations and wood anatomy in nine canopy tree species in a Malaysian wet tropical rainforest

Cited by 9 publications

References 45 publications

Limited Phenotypic Variation in Vulnerability to Cavitation and Stomatal Sensitivity to Vapor Pressure Deficit among Clones of Aristotelia chilensis from Different Climatic Origins

Limited Phenotypic Variation in Vulnerability to Cavitation and Stomatal Sensitivity to Vapor Pressure Deficit among Clones of Aristotelia chilensis from Different Climatic Origins

Physiological and climate controls on foliar mercury uptake by European tree species

Comment on bg-2021-239

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