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Four-year-old potted saplings of Quercus petraea (Matt) Liebl were exposed to water shortage by withholding irrigation. After 10 days, predawn leaf water potential was decreased to -2.0 MPa and leaf photosynthesis was reduced by 55%. At this stage, starch and sucrose concentrations were decreased by 47 and 48%, respectively. A five-fold increase was observed in glucose and fructose concentrations...
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