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Leaf-to-leaf water movement
Succulents re-distribute water from old to young leaves during drought stress. Rabas and Martin (pp. 529-536) examine the effects of water movement by detaching old leaves and studying the resultant physiology of remaining young leaves. An absence of old leaves is shown to reduce competition for water with young leaves, resulting in higher water content and greater photosynthetic rates in the remaining young leaves.
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