Comparison Of Tracheary Element Differentiation In Intact Leaves And Isolated Mesophyll Cells Of Zinnia Elegans
Published 1984 · Biology
Abstract The process of tracheary element differentiation in intact leaves of Zinnia elegans is described using transmission electron microscopy. The process can be divided into three phases: wall thickening, cytoplasmic degeneration and wall hydrolysis. These features are described and compared with similar stages occurring during the differentiation of tracheary elements from isolated Zinnia mesophyll cells. This comparison emphasises that the unusual features of differentiation seen in isolated cells are not typical of the same plant's behaviour during normal growth. The possible nature of the observed differences is discussed.