Accession Number : AD0774814

Title :   Biochemical Study of the Secretion of Abscission Enzyme as Related to Leaf Abscission and Defoliation.

Descriptive Note : Technical rept. Aug 72-Jun 73,


Personal Author(s) : Forrence,L. E. ; Leather,G. R.

Report Date : FEB 1974

Pagination or Media Count : 11

Abstract : Abscission of bean petiolar explants is effected by the production of cellulase in the cytoplasm and its secretion into the intercellular spaces of the abscission zone (exocellular cellulase). Attempts to increase the production and secretion of cellulase were made by injection bean petiolar explants with several different chemicals. Their effects on explant abscission were evaluated and compared with that caused by ethylene which has been previously found to enhance abscission, cellulase production, and cellulase secretion. Of 11 compounds studied, only abscisic acid showed a direct relationship between abscission and increased cellulase production. This growth regulator, however, had no effect on cellulase secretion. Copper chloride, an ionic substance, materially increased abscission but not cellulase production. (Author)

Descriptors :   *Enzymes, *Plants(Botany), *Defoliants, Ethylene, Chemical analysis, Molecular properties, Biochemistry, Colchicine, Growth(Physiology)

Subject Categories : Biochemistry
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE