Photosynthetica - Ahead of Print
Photosynthetic responses and growth dynamics of Allagoptera arenaria (Gomes) Kuntze (Arecaceae) in a chronosequence in a Restinga restoration area
A.J.G. JÚNIOR, M.M. MENDES, F.R. PIRES, A.A. FERNANDES, A.R. FALQUETO, L.F.T.D. MENEZES
Photosynthetica X:X | DOI: 10.32615/ps.2026.001 
Knowledge about plant species' growth dynamics is essential in restoring degraded environments. In this study, we evaluated the growth dynamics of Allagoptera arenaria (Gomes) Kuntze in a chronosequence of plantations in the Restinga. The sampling was taken from three populations with different planting ages (n = 12): group GI - 8 months; GII - 4 years; GIII - 7 years. We analyzed biometric measurements, leaf traits, photosynthetic pigments, and chlorophyll a fluorescence. The GI group's maximum quantum yield of primary photochemistry was significantly higher. On the other hand, the energy dissipation by heat was significantly...
Exploring prediction mechanisms for temperature-induced variation in maximum carboxylation rate from spectral reflectance across 450-850 nm in cucumber leaves
T. SHIBATA, H. YAMAGUCHI, S. KUBOTA, D. YASUTAKE, T. HIROTA, G. YOKOYAMA
Photosynthetica X:X | DOI: 10.32615/ps.2026.006
Leaf spectral reflectance across 450-850 nm has been shown to predict maximum carboxylation rate (Vcmax), which varies with leaf temperature (Tleaf). However, the mechanism by which temperature-induced variation in Vcmax is predicted from reflectance remains unclear. The objective of this study was to explore this mechanism using spectral reflectance across 450-850 nm. We measured Vcmax across a range of Tleaf (18-31°C) and reflectance in cucumber (Cucumis sativus L.) leaves. Partial least squares regression models moderately predicted Vcmax...