Short-term Flooding Affects Gas Exchange Characteristics of Containerized Sour Cherry Trees

Abstract

The effects of short-term soil flooding on gas exchange characteristics of containerized sour cherry trees (Prunus cerasus L. cv. Montmorency /P. mahaleb L.) were studied under laboratory conditions. Soil flooding reduced net CO 2 assimilation (A) within 24 hours. Net CO 2 assimilation and residual conductance to CO 2 (g r ′) declined to ≈30% of control values after 5 days of flooding. Effects on stomatal conductance to CO 2 (g S ) and intercellular CO 2 (C i ) were not significant during the 5 days of treatment. Apparent quantum yield (Φ) gradually declined to 52% that of controls during these 5 days. In a second experiment, CO 2 response curves suggested that, initially, stomatal and nonstomatal limitations to A were of about equal importance; however, as flooding continued, nonstomatal limitations became dominant.