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Plasmatubules in transfer cells of pea (Pisum sativum L.)
N. Harris and N.J. Chaffey
Vol. 165, No. 2 (1985), pp. 191-196
Published by: Springer
Stable URL: http://www.jstor.org/stable/23377774
Page Count: 6
You can always find the topics here!Topics: Plant cells, Sieve elements, Bundle sheath cells, Solutes, Intercellular junctions, Parenchyma, Phloem, Plasma cells, Cell membranes, Peas
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Plasmatubules are tubular evaginations of the plasmalemma. They have previously been found at sites where high solute flux between apoplast and symplast occurs for a short period and where wall proliferations of the transfer cell type have not been developed (Harris et al. 1982, Planta 156, 461—465). In this paper we describe the distribution of plasmatubules in transfer cells of the leaf minor veins of Pisum sativum L. Transfer cells are found in these veins associated both with phloem sieve elements and with xylem vessels. Plasmatubules were found in both types of transfer cell and it is suggested that the specific distribution of the plasmatubules may reflect further membrane amplification within the transfer cell for uptake of solute from apoplast into symplast.
Planta © 1985 Springer