Water is the most abundant constituent of all physiologically active plant tissues. The water contents of leaves, for example, lie mostly in a range of 55–85% of their fresh weight. The range of water contents for other relatively succulent parts of plants, such as younger roots and herbaceous stems is about the same. Water contents of even such a largely non-living tissue such as wood are mostly in the range of 30–60% of the fresh weight. The lowest water contents among living plant organs occur principally in such dormant structures as seeds and spores.


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© Springer-Verlag OHG. Berlin · Göttingen · Heidelberg 1956

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  • Bernard S. Meyer

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