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Seasonal changes in stomatal responses of sweet cherry and plum to water status in detached leaves
Author(s) -
Yoon Tae Myung,
Richter Hanno
Publication year - 1990
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1990.tb05673.x
Subject(s) - turgor pressure , prunus , stomatal conductance , horticulture , biology , botany , dehydration , rosaceae , ripening , osmotic pressure , photosynthesis , biochemistry
Seasonal changes in the relationship between stomatal responses and water potential components in detached leaves of sweet cherry ( Prunus avium L. cv. Bigarreau Morreau) and plum ( Prunus domestica L. cv. Queen Victoria) were examined by the simultaneous measurement of stomatal conductance and water relation parameters derived from pressure‐volume curves. The water potential threshold for stomatal closure in sweet cherry leaves throughout the season and in plum leaves until mid‐July varied nearly in parallel with changes in the osmotic potential at the turgor loss point. From August onward, closing reactions of plum stomata had no relationship to the turgor loss point. Stomata of sweet cherry leaves opened more widely and showed slower reactions to dehydration early in the season than later. Seasonal changes of stomatal conductance and stomatal responses to dehydration in both species seem thus to be influenced by fruit development and ripening.