caa a22 4500 605481040 CHVBK 20210128100419.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11099-015-0105-6 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0105-6 Leaf water use in heterobaric and homobaric leafed canopy tree species in a Malaysian tropical rain forest [Elektronische Daten] [Y. Inoue, T. Kenzo, A. Tanaka-Oda, A. Yoneyama, T. Ichie] Tropical canopy tree species can be classified into two types by their heterobaric and homobaric leaves. We studied the relation between both leaf types and their water use, together with the morphological characteristics of leaves and xylem, in 23 canopy species in a tropical rain forest. The maximum rates of photosynthesis and transpiration were significantly higher in heterobaric leaf species, which also underwent larger diurnal variations of leaf water potential compared to homobaric leaf species. The vessel diameter was significantly larger and the stomatal pore index (SPI) was significantly higher in heterobaric than that in homobaric leaf species. There was a significant positive correlation between the vessel diameter, SPI, and maximum transpiration rates in all the studied species of both leaf types. However, there was no significant difference in other properties, such as leaf water-use efficiency, leaf mass per area, leaf nitrogen content, and leaf δ13C between heterobaric and homobaric leaf species. Our results indicate that leaf and xylem morphological differences between heterobaric and homobaric leaf species are closely related to leaf water-use characteristics, even in the same habitat: heterobaric leaf species achieved a high carbon gain with large water use under strong light conditions, whereas homobaric leaf species can maintain a high leaf water potential even at midday as a result of low water use in the canopy environment. The Institute of Experimental Botany, 2015 bundle-sheath extension nationallicence Dipterocarpaceae nationallicence gas exchange nationallicence leaf morphology nationallicence wood density nationallicence BSE : bundle-sheath extension nationallicence DBH : stem diameter at breast height nationallicence D v : vessel diameter nationallicence E max : maximum transpiration rate nationallicence GCL : guard cell length nationallicence g s : stomatal conductance at P max nationallicence LMA : leaf mass per area nationallicence Narea : nitrogen per unit leaf area nationallicence Nmass : mass-based leaf nitrogen concentration nationallicence PIC : phylogenetically independent contrast nationallicence P max : maximum photosynthetic rate nationallicence PNUE : the ratio of CO2 assimilation rate to leaf organic nitrogen content nationallicence RGR : relative growth rate nationallicence SD : stomatal density nationallicence SPI : stomatal pore index nationallicence V d : vessel density nationallicence VPD : vapor pressure deficit nationallicence W d : wood density nationallicence WUE : intrinsic water-use efficiency nationallicence δ13C : stable carbon isotope ratio nationallicence ΔΨL : diurnal variation in the leaf water potential nationallicence Ψmid : leaf water potential at midday nationallicence Ψpd : leaf water potential at predawn nationallicence Inoue Y. The United Graduate School of Agricultural Sciences, Ehime University, 790-8566, Matsuyama, Japan aut Kenzo T. Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Japan aut Tanaka-Oda A. Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Japan aut Yoneyama A. The United Graduate School of Agricultural Sciences, Ehime University, 790-8566, Matsuyama, Japan aut Ichie T. Faculty of Agriculture, Kochi University, 783-8502, Nankoku, Japan aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 177-186 0300-3604 53:2<177 2015 53 11099 https://doi.org/10.1007/s11099-015-0105-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0105-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Inoue Y. The United Graduate School of Agricultural Sciences, Ehime University, 790-8566, Matsuyama, Japan aut NATIONALLICENCE 700 1- Kenzo T. Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Japan aut NATIONALLICENCE 700 1- Tanaka-Oda A. Forestry and Forest Products Research Institute, 305-8687, Tsukuba, Japan aut NATIONALLICENCE 700 1- Yoneyama A. The United Graduate School of Agricultural Sciences, Ehime University, 790-8566, Matsuyama, Japan aut NATIONALLICENCE 700 1- Ichie T. Faculty of Agriculture, Kochi University, 783-8502, Nankoku, Japan aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/2(2015-06-01), 177-186 0300-3604 53:2<177 2015 53 11099