1, 2
*A part of thesis submitted by the first author to the School of advanced graduate studies Michigan State University for the degree of Doctor of Philosophy, 1954.
Histological studies revealed that with MH there was a retardation of cell division in the buds and root primordia of tubers and bulbs, respectively. The greater diameter of stems of potato plants following treatment with MH can in part, be explained by an increase in cell size.
Struckmeyer (9) noted that leaves of treated plants were thicker as a result of some what large cells size, had a less compact arrangement of the spongy parenchyma cells and large intercellular spaces. In addition, Struckmeyer observed that the phloem elements of the vascular bundles of both stems and leaves were comonly found in varying stages of collapse.
Watson (10) observed the histological effects of MH upon Red Kidney beans and noted that the abscission zone of petioles was in a more advanced stage in treated plants. No abnormal cells division was observed.
