A Cytological Study of Allium cepa and Phaseolus lunatus
Abstract
In recent years there has been considerable investigation of cell lineages and cell growth in meristems. The Histogen Theory formulated by Hanstein (1869) explained the development of the embryo of Angiosperms to the formation of the primary root with a root cap. From distinct apical cells, or histogens, the root and stem progressed according to a definite plan: the dermatogen, the surface cell layer, produced the epidermal system; the periblem, or underlying layer, formed the inner tissues of the root or the cortex; the plerome, or central core, gave rise to the pith and vascular tissue. Hanstein (1870) in his fundamental studies of monocotyledons and dicotyledons established the significance of individual cells in the growth of the entire plant. This theory had a stimulating and lasting effect on subsequent research. Janczewski (1874) and Flahault (1878) in their studies of the terminal growth of the roots of Phanerogames agreed with the idea of Hanstein (1869).
Subject Area
Cellular biology|Plant sciences|Botany
Recommended Citation
Burns, John Francis, "A Cytological Study of Allium cepa and Phaseolus lunatus" (1952). ETD Collection for Fordham University. AAI28509452.
https://research.library.fordham.edu/dissertations/AAI28509452
