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Leaf and Branch Hydraulic Plasticity of Two Light-Demanding Broadleaved Tree Species Differing in Water-Use Strategy
| Content Provider | MDPI |
|---|---|
| Author | Eele, Õunapuu-Pikas Venisse, Jean-Stéphane Label, Philippe Sellin, Arne |
| Copyright Year | 2022 |
| Description | Global climate change creates new environmental scenarios and selective pressures; thus, a better understanding of the plasticity of plant functional traits is needed to predict how plant species will respond to shifts in climate. Among the important functional traits for plants are their hydraulic properties which ultimately determine their photosynthetic capacity, growth rate, and survival in a changing environment. In this study, the light sensitivity of leaf $(K_{L}$) and branch hydraulic conductance $(K_{B}$) to fast changes in irradiance, and hydraulic plasticity $(PI_{h}$) was studied in two broadleaved tree species differing in water-use strategy—silver birch (Betula pendula) and hybrid aspen (Populus × wettsteinii). The $K_{L}$ increased by a factor of 3.5 and 1.5 from minimal values recorded in darkness to maximal values in high light conditions for birch and aspen, respectively, indicating a significantly higher $PI_{h}$ for birch (0.72) than for aspen leaves (0.35). $K_{B}$ increased 1.5-fold from dark to light conditions for both species. The high light sensitivity of $K_{L}$ and $K_{B}$ provides a regulatory mechanism to maintain a balance between transpirational demand and hydraulic supply. The plasticity of these traits increases the ability of plants to cope with a rapidly changing environment and to adapt to global climate change. |
| Starting Page | 594 |
| e-ISSN | 19994907 |
| DOI | 10.3390/f13040594 |
| Journal | Forests |
| Issue Number | 4 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-10 |
| Access Restriction | Open |
| Subject Keyword | Forests Forestry Acclimation Fluctuating Irradiance Hydraulic Conductance Ionic Effect Light Sensitivity Plasticity Plant–water Relations Xylem Sap |
| Content Type | Text |
| Resource Type | Article |
