Abstract
Effects of progressive soil drought on leaf growth, the rate of photosynthesis, and phytohormone contents were followed in the experiments with cucumber (Cucumis sativus L.) plants. Suppression of photosynthesis by drought did not immediately cause growth retardation, because the latter was observed one day earlier than the inhibition of photosynthesis. In the meantime, growth retardation could be caused by a decline in IAA and cytokinin contents, rather than ABA accumulation, because ABA accumulated when the growth has been already suppressed.
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