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The effects of water deficit and fruiting on leaf gas exchange and dry-matter production and partitioning in cucumber ( Cucumis sativus  L.) plants were evaluated in greenhouse and field experiments. Fruiting plants had higher photosynthetic rates (15.8 μmol·m -2 ·s -1 ) than defruited plants (12.7 μmol·m -2 ·s -1 ). Although stomatal conductance was lower in defruited plants, it accounted for only ≈35% of the assimilation rate (A) reduction. Under water deficit, defruiting caused a similar response in A, even though A was only ≈50% of that in watered plants. Fruiting and water deficits limited vegetative plant dry weight and total leaf area. In field experiments, removing flowers from the first four or eight nodes resulted in a higher count and fresh weight at harvest of only those pickling cucumber fruit that were irrigated.

Water Deficits and Fruiting Affect Carbon Assimilation and Allocation in Cucumber Plants