STRUCTURAL CHANGES DURING BEAN LEAF ABSCISSION
Abstract
Anatomical changes in the laminar abscission zone of primary leaves of Phaseolus vulgaris L. ‘Red Kidney’ have been examined in conjunction with the regulation of abscission by growth substances. Quantitative measurements were made of the frequency of vascular obstructions (tyloses, callose plugs). The development of abscission was correlated with an increasing frequency of tyloses and other plugging materials in the xylem of the abscission zone coupled with the dissolution of callose from the abscission zone sieve tubes. These changes were accelerated in petiole explants in which abscission was stimulated by either ethylene or auxin and were suppressed in explants in which abscission was inhibited by auxin.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 01, 1967
- Source ID
- 10.1002/j.1537-2197.1967.tb10694.x
Entities
People
- A. C. Leopold
- Barbara D. Webster
- Lillian W. Miller
- Peter C. Scott
Organizations
- Purdue University
- United States Army