Distribution of boron in leaves

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Abstract
The distribution pattern of B in leaves of Easter lilies and rubrum lilies was found to be a hyperbolic increase from the leaf base to near the leaf tip. This, along with the finding that much of the B in the leaf is mobile, lead the authors to the conclusions that: B moves passively in the transpiration stream and that the distribution of B may be accounted for by considering only a few physical parameters of the system; the lack of transport of B from the leaves is probably due to lack of transport by the phloem; injury to the leaf by excess B is local and primary rather than secondary; loss of gutation solution acts as a protective mechanism against B injury.

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