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Journal of Experimental Botany, Vol. 52, No. 358, pp. 1123-1127, May 1, 2001
© 2001 Oxford University Press

Short Communication

Adaptation to long-term cold-girdling in genotypes of common bean (Phaseolus vulgaris L.)

M.A. Hannah1, M.J. Iqbal and F.E. Sanders

School of Biology, University of Leeds, Leeds LS2 9JT, UK

Abstract

The effect of long-term cold-girdling on phloem transport and resource allocation in whole plants of common bean is described. Wide differences were found between genotypes, with some maintaining translocation when cold-girdled. This provides evidence to support passive phloem transport. The possibilities that cold-girdling may physically block transport and/or disrupt root–shoot signalling are discussed.

Key words: Cold-girdling, phloem transport, DL alleles, root–shoot allocation, common bean, Phaseolus vulgaris L.


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