A COMPARATIVE ANALYSIS OF CELL MORPHOLOGY IN MATURING TISSUES OF ROOTS FROM SHOCKED AND UNSHOCKED BULBS OF ALLIUM CEPA L.

Abstract

A shock pressure pulse of 60 pounds per square inch (psi; 4.22 kg/cm2) effectively inhibited root growth of onion bulbs. Morphological changes observed after shock included a reduction in cell number in transverse section, a decrease in cell length, a decrease in cell volume, and an increase in cell cross‐sectional area. Mitotic activity was consistently increased one day after shock, and this may have accounted for the increased cell number per millimeter of root tip segment 8 days after shock. The development of the tissues appeared normal after shock exposure; however, the tissue response to pressures seems to depend on whether they are exposed to prolonged confining pressures or a brief pressure pulse. Responses which were unique to shock treatment include a decrease in cell number in transverse section, reduced cell volume, and increased radial enlargement of the cell. These responses have not been observed under prolonged pressure treatment.

Document Details

Document Type
Pub Defense Publication
Publication Date
Feb 01, 1971
Source ID
10.1002/j.1537-2197.1971.tb09954.x

Entities

People

  • Sylvia A. Murray

Organizations

  • Defense Advanced Research Projects Agency
  • United States Department of Defense

Tags

Fields of Study

  • Biology

Readers

  • Breast cancer cell signaling and growth regulation.
  • Combustion Dynamics and Shock Wave Physics.
  • Mathematics or Statistics