Cellulase activity and localization during induced abscission of Coleus blumei

Treatment with dimethipin (2,3-dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4 tetroxide) inhibited the increase in cellulase activity and decrease in breakstrength associated with the normal course of abscission in Coleus. Application of the surfactant UBI-1126 (Emery OAL 20 in isopropyl alcohol) increase...

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Bibliographic Details
Published in:Journal of plant growth regulation 1992-06, Vol.11 (3), p.129-134
Main Authors: Baird, L.M. (University of San Diego, San Diego, CA), Reid, P.D
Format: Article
Language:English
Subjects:
ABSCISION
ABSCISSION
ACTIVIDAD ENZIMATICA
ACTIVITE ENZYMATIQUE
Agronomy. Soil science and plant productions
ANATOMIA DE LA PLANTA
ANATOMIE VEGETALE
Biological and medical sciences
CELLULASE
CELULASA
COLEUS
Fundamental and applied biological sciences. Psychology
Life Sciences & Biomedicine
Plant physiology and development
Plant Sciences
Science & Technology
Senescence and abscission
SUBSTANCE DE CROISSANCE VEGETALE
SURFACTANT
SURFACTANTES
SUSTANCIAS DE CRECIMIENTO VEGETAL
Vegetative apparatus, growth and morphogenesis. Senescence
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Summary:Treatment with dimethipin (2,3-dihydro-5,6-dimethyl-1,4-dithiin 1,1,4,4 tetroxide) inhibited the increase in cellulase activity and decrease in breakstrength associated with the normal course of abscission in Coleus. Application of the surfactant UBI-1126 (Emery OAL 20 in isopropyl alcohol) increased cellulase activity and accelerated the process of abscission in Coleus explants within 24 h of application. Cellulase activity was localized histochemically at the electron microscopic level in surfactant-treated tissue. The enzyme activity was localized primarily in the cell wall, middle lamella, and paramural bodies of abscission zone cells
ISSN:0721-7595
1435-8107
DOI:10.1007/BF00194361