Ultrastructural Study on Lemna perpusilla

Abstract

The structure of young frond cells of Lemna perpusilla is similar to meristematic cells. The abscission zone which forms in Lemna is found to consist of 4-5 rows of rectangular cells. Early in development, cells in this zone often have long segments of endoplasmic reticulum associated with plasmodesmata. Later, microtubules associated with the walls of cells in this zone assume a random orientation. Myelin figures appear and as abscission progesses, cell separation occurs. The development of crystal and the association of ribosome-like particles are also observed.