New Publication in Tree Physiology on physiological phenology

Friday, February 5, 2016 - 3:57pm
New research published by Emmanuelle and Christine shows how photoperiod and temperature affect light use efficiency and vegetation indices in Eastern white pine.
They show that short photoperiod during autumn induces zeaxanthin-independent mechanisms for non-photochemical quenching. This change remains undetected by a widely used vegetation index, PRI, which is used in remote sensing to assess physiological performance and phenology in plants. As a result of these zeaxanthin-independent quenching mechanisms they observed a discrepancy in the relationship between PRI and photosynthesis, which can cause an overestimation of photosynthesis, if assessed by PRI and remote sensing approaches alone.