RT Journal Article
T1 Light, transpiration and water use efficiency: contrasts among seedlings of three Eucalyptus urophylla × Eucalyptus grandis clones
A1 Ramalho dos Santos, Aline
A1 Macedo Pezzopane, José Eduardo
A1 Araquém Ramos Cairo, Paulo
A1 Leão Gibson, Elbya
A1 Fernández Martínez, Manuel
A1 Vitor Toledo, João
A1 Macedo Pezzopane, José Ricardo
A1 Alves Rodrigues, Vinícius
K1 Water use efficiency
K1 Plant growth
K1 Leaf area
K1 Net photosynthesis
K1 Quantum yield
K1 Plant-water relationship
AB Accurately measuring water absorption and consumption can help improve understanding of forest dynamics and water resource management, especially in areas with water restrictions. In this study, the objective was to evaluate hourly, daily and accumulated transpiration rates of young Eucalyptus urophylla × Eucalyptus grandis plants. A randomized block experiment was conducted with seedlings of clones I144, CO1407, and A211 transplanted into pots. At 120 days after transplanting, leaf area and root, shoot, and total dry mass were measured. Furthermore, water use efficiency, the relationship between transpiration and leaf area, and the relationship between daily transpiration and energy availability, provided by radiation balance and leaf area ratio, were determined. Leaf transpiration increased concomitantly with plant growth of all clones, reaching a maximum with the highest leaf area. The volume of water consumed at the end of 1689 accumulated degree-days was around 20% higher in clone I144, compared to clones CO1407 and A211. The clones showed differences in hourly transpiration throughout the growth stages. CO2 assimilation varied between clones, with net photosynthesis being higher in clone A211, while clones I144 and CO1407 showed higher quantum yield. The increase in leaf area helped to increase the transpiration rate and improve the efficiency of using the energy balance for water loss from the plants. Dry mass production were higher in clones I144 and A211. Conversely, regarding water use efficiency, clones A211 and CO1407 had higher dry mass yield per gram of water transpired. Thus, we conclude that, among the most productive clones, clone I144 was preferably recommended for areas free from water restrictions, while clone A211, for areas with low water availability.
PB Springer
SN 1612-4669
SN 1612-4677 (electrónico)
YR 2025
FD 2025
LK https://hdl.handle.net/10272/27734
UL https://hdl.handle.net/10272/27734
LA eng
NO dos Santos, A.R., Pezzopane, J.E.M., Cairo, P.A.R. et al. Light, transpiration and water use efficiency: contrasts among seedlings of three Eucalyptus urophylla ×  Eucalyptus grandis clones. Eur J Forest Res 144, 1569–1580 (2025). https://doi.org/10.1007/s10342-025-01826-w
NO This study was partly financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brazil (CAPES)—Finance Code 001, and the Fundação de Amparo à Pesquisa e Inovação do Espírito Santo (FAPES).
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026