Abstract
Xylem fibers were found to have retained their nucleus in 27 species of 17 genera. These fibers were characterized by thick lignified walls with narrow lumen and tapering ends. Their length and width varied among the species studied and were greatest in Phyllanthes emblica Linn. and least in Antigonon leptopus H. & A. Depending on the species, the fibers were either septate or nonseptate. Each compartment of the septate fibers was accompanied by a single nucleus. The nuclei of these fibers were oval to oblong or fusiform in shape. Accumulation of starch in the lumina of the nucleated fibers was a common feature in all the species. Occurrence of nucleated fibers and its possible significance is discussed.
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