“What is the cost of opening stomata?” seminario a cura del Prof. Roderick Dewar

Il GdL di Modellistica Forestale SISEF segnala il seminario intitolato “What is the cost of opening stomata?” a cura del Prof. Roderick Dewar che si terrà lunedì 24 gennaio alle 14:00 CEST (Parigi). Il seminario si terrà in lingua inglese.

Potete registrarvi al seguente link: https://us06web.zoom.us/meeting/register/tZAof-6qrD4sGteNwV-KVy5gkm7ojP_NcnTk

Abstract:

Stomatal optimisation models, which have a long history, attempt to understand observed stomatal behaviour in terms of a trade-off between the benefits and costs of stomatal opening. All models agree on the benefits (increased CO2 supply) and on the general nature of the costs (increased water loss), but they disagree on the precise nature of the costs of increased water loss. In this talk I will discuss a recent optimisation model according to which stomata adjust so as to maximise the rate of leaf photosynthesis, under the assumption that water loss leads to non-stomatal limitations to photosynthesis, for which there is growing evidence. The model, which can be solved analytically, explains and synthesises observed stomatal responses to changes in both above- and below-ground environmental factors, and also to changes in internal sink strength.

Dewar RC, Hölttä T, Salmon Y. 2021. Exploring optimal stomatal control under alternative hypotheses for the regulation of plant sources and sinks. New Phytologist 233: 639-654 https://doi.org/10.1111/nph.17795

Federico Magnani, Gina Marano, Alessio Collalti