Plant Physiol. Drug Metab Dispos
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Plant Physiology 79:973-976 (1985)
© 1985 American Society of Plant Biologists

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Puschmann, R.
Right arrow Articles by Romani, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Puschmann, R.
Right arrow Articles by Romani, R.
Agricola
Right arrow Articles by Puschmann, R.
Right arrow Articles by Romani, R.
Articles

Ethylene Production by Suspension-Cultured Pear Fruit Cells as Related to Their Senescence

Rolf Puschmann1, Dangyang Ke2 and Roger Romani

Department of Pomology, University of California, Davis, California 95616

Suspension-cultured pear fruit cells produce low levels of ethylene during growth and division in auxin containing medium. When deprived of auxin, division gradually ceases and ethylene production falls to barely discernible levels. However, notable ethylene production can now be induced by indoleacetic acid, CuCl2, or 1-aminocyclopropane-1-carboxylic acid. If the auxin-deprived cells are transferred to `aging' medium that lacks auxin but contains 0.4 molar mannitol, inducible ethylene production increases several-fold reaching levels of 40 to 60 nanoliters/106 cells per hour. Maximum inducible ethylene productivity is attained at varying times (1-6 days) after transfer to aging medium and appears to be temporally related to cell survival, i.e. the time of subsequent cell death. It is argued that auxin depletion initiates senescence which, in turn, leads to a transient increase in inducible ethylene production and eventual death. The limitations and potentials of the suspension-cultured pear cells as a system for the study of cellular senescence are discussed.

1 Permanent address: Departamento de Biologia Vegetal, Universidade Federal de Vicosa 36570, Vicosa, Minas Gerais, Brazil.

2 Under sponsorship of the Ministry of Education of China.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1985 by the American Society of Plant Biologists