Responses of photosynthesis to high temperatures in oak saplings assessed by chlorophyll-a fluorescence: inter-specific diversity and temperature-induced plasticity Chyraz Daas, Pierre Montpied, Belgacem Hanchi and Erwin DreyerAnn. For. Sci., 65 3 (2008) 305DOI: https://doi.org/10.1051/forest:2008002