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. 1990 Dec;94(4):1625–1633. doi: 10.1104/pp.94.4.1625

Coupling of Solute Transport and Cell Expansion in Pea Stems 1

Judy Gougler Schmalstig 1, Daniel J Cosgrove 1
PMCID: PMC1077430  PMID: 11537472

Abstract

As cells expand and are displaced through the elongation zone of the epicotyl of etiolated pea (Pisum sativum L. var Alaska) seedlings, there is little net dilution of the cell sap, implying a coordination between cell expansion and solute uptake from the phloem. Using [14C]sucrose as a phloem tracer (applied to the hypogeous cotyledons), the pattern of label accumulation along the stem closely matched the growth rate pattern: high accumulation in the growing zone, little accumulation in nongrowing regions. Several results suggest that a major portion of phloem contents enters elongating cells through the symplast. We propose that the coordination between phloem transport and cell expansion is accomplished via regulatory pathways affecting both plasmodesmata conductivity and cell expansion.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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