Ricerc@Sapienza

The differential degree by which paraheliotropism may counterbalance the deleterious impact of high irradiance between congeneric species in relation to different water availabilities has been poorly investigated. We followed the evolution of gas exchange, quenching analysis and OJIP parameters in restrained (R) and free (F) to move leaves of Cistus monspeliensis (CM) and Cistus salvifolius (CS) under drought stress (WS) and well-watered conditions (WW).

Corylus avellana L. (hazelnut) is one of the world’s major nut crops, and is considered a sensitive species to water stress having a low capacity for stomatal regulation. Knowledge of hazelnut response to water stress is important from an economical point of view since water stress affects fruit quality and production. In this context, the effects of three different water regimes imposed during leaf development of hazelnut saplings were analyzed.