This is a preview. Log in through your library . Abstract Light microscopic studies of the petioles of Lagenaria siceraria reveal that the external phloem of each bicollateral vascular bundle develops ...
The Plant Cell, Vol. 11, No. 1 (Jan., 1999), pp. 127-140 (14 pages) Phloem-specific proteins (P proteins) are particularly useful markers to investigate long-distance trafficking of macromolecules in ...