The recovery of photosynthetic rate is prolonged in red raspberry following a rootzone water deficit stress

Plants are increasingly subjected to variable weather as a consequence of climate change.
Resulting abiotic stresses, e.g., water deficit stress, can lower marketable yields and produce quality in crop plants, and a better understanding of how physiological responses are regulated, during both the stress and recovery phases is needed to help to mitigate risk.
Using a commercial potted raspberry cultivar, the short-and longer-term effects of a transient rootzone water deficit stress on water balance and leaf gas exchange were determined.
A transient rootzone water deficit stress triggered a decrease in midday stem water potential within three days, soon followed by a fall in stomatal conductance (g_s) and photosynthesis (A). After substrate rewetting, shoot water balance recovered within hours.
However, stress legacy effects on leaf gas exchange were more persistent, with midday g_s and A values recovering five days after rewetting.

I International Symposium on Protected Cultivation, Nettings and Screens for Mild Climates

E. Iman Moustafa, T. Lawson, A. Cavanagh, M. Else

photosynthesis, stomatal conductance, raspberry, water deficit stress, recovery

https://doi.org/10.17660/ActaHortic.2025.1437.39