Hydraulic traits predict stem growth across Hevea brasiliensis clones in a Malaysian climatically marginal area

Hazir, Mohd Hafiz Mohd; Gloor, Emanuel; Galbraith, David

doi:10.1016/j.foreco.2021.119864

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Cited by 4 publications

References 93 publications

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Functional Correlations of Wood Density

Kallarackal,

Ramírez

2024

Wood Density

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Functional Correlations of Wood Density

Kallarackal,

Ramírez

2024

Wood Density

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Canopy reflectance spectra’s variability, physical traits’ uniqueness and the prediction of rubber clones (Hevea brasiliensis)

Hazir,

Daud,

Shahabudin

et al. 2023

Industrial Crops and Products

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Plasticity of wood and leaf traits related to hydraulic efficiency and safety is linked to evaporative demand and not soil moisture in rubber (Hevea brasiliensis)

Waite,

Leuschner,

Delzon

et al. 2023

Tree Physiology

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The predicted increase of drought intensity in Southeast Asia has raised concern about the sustainability of rubber (Hevea brasiliensis) cultivation. In order to quantify the degree of phenotypic plasticity in this important tree crop species, we analysed a set of wood and leaf traits related to hydraulic safety and efficiency in PB260 clones from eight small-holder plantations in Jambi province, Indonesia, representing a gradient in local microclimatic and edaphic conditions. Across plots, branch embolism resistance (P50) ranged from −2.14 to −2.58 MPa. P50 and P88 values declined, and the hydraulic safety margin increased, with an increase in mean annual vapour pressure deficit (VPD). Among leaf traits, only changes in specific leaf area were related to differences in evaporative demand. These variations of hydraulic trait values were not related to soil moisture levels. We did not find a trade-off between hydraulic safety and efficiency, but vessel density emerged as a major trait associated with both safety and efficiency. Vessel density, and not vessel diameter, was closely related to P50 and P88, as well as to specific hydraulic conductivity, the lumen-to-sapwood area ratio and the vessel grouping index. In conclusion, our results demonstrate some degree of phenotypic plasticity in wood traits related to hydraulic safety in this tropical tree species, but only in response to local changes in evaporative demand and not soil moisture. Given that VPD may increasingly limit plant growth in a warmer world, our results provide evidence of hydraulic traits changes in response to a rising evaporative demand.

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Hydraulic traits predict stem growth across Hevea brasiliensis clones in a Malaysian climatically marginal area

Cited by 4 publications

References 93 publications

Functional Correlations of Wood Density

Functional Correlations of Wood Density

Canopy reflectance spectra’s variability, physical traits’ uniqueness and the prediction of rubber clones (Hevea brasiliensis)

Plasticity of wood and leaf traits related to hydraulic efficiency and safety is linked to evaporative demand and not soil moisture in rubber (Hevea brasiliensis)

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