Nighttime transpiration represents a negligible part of water loss and does not increase the risk of water stress in grapevine.

ABSTRACT: Nighttime transpiration has been previously reported as a significant source of water loss in many species; however, there is a need to determine if this trait plays a key role in the response to drought. This study aimed to determine the magnitude, regulation and relative contribution to whole plant water-use, of nighttime stomatal conductance (g_night ) and transpiration (E_night ) in grapevine (Vitis vinifera L.). Our results showed that nighttime water loss was relatively low compared to daytime transpiration, and that decreases in soil and plant water potentials were mainly explained by daytime stomatal conductance (g_day ) and transpiration (E_day ). Contrary to E_day , E_night did not respond to VPD and possible effects of

SUBMITTER: Dayer S 

PROVIDER: S-EPMC7894480 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature