Leaf water potential, stomatal resistance, and photosynthetic response to water stress in peach seedlings.
Individual groups of peach (Prunus persica [L.] Batsch) seedlings stressed to -17, -26 and -36 bars recovered to control levels within 1, 3, and 4 days, respectively. Stomatal resistance was significantly correlated with both leaf water potential and net photosynthesis. In seedlings stressed to -52 bars, leaf water potential and stomatal resistance recovered sooner than net photosynthesis, despite recovery of 0(2) evolution at a rate similar to leaf water potential. Therefore, some nonstomatal factor other than reduction in photochemical activity must be responsible for the lag in recovery of CO(2) assimilation following irrigation.
Hand
J M
JM
Department of Horticulture and Forestry, New Jersey Agricultural Station, Rutgers University, New Brunswick, New Jersey 08903.
Young
E
E
Vasconcelos
A C
AC