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


     

Plant Physiology 64:534-537 (1979)
© 1979 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 Web of Science (31)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Poovaiah, B. W.
Right arrow Articles by Nukaya, A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Poovaiah, B. W.
Right arrow Articles by Nukaya, A.
Agricola
Right arrow Articles by Poovaiah, B. W.
Right arrow Articles by Nukaya, A.
Articles

Polygalacturonase and Cellulase Enzymes in the Normal Rutgers and Mutant rin Tomato Fruits and Their Relationship to the Respiratory Climacteric 1

B. W. Poovaiah and A. Nukaya2

a Department of Horticulture, Washington State University, Pullman, Washington 99164

Cell wall enzymes at different stages of fruit development were compared between the normal Rutgers and the isogenic nonripening rin tomato. In Rutgers, a detectable increase in polygalacturonase (PG) activity was observed 6 days prior to the respiratory climacteric (43 days postanthesis). The maximum increase in PG activity occurred after C2H2 and CO2 production reached their peak. However, in the rin tomato, no change in PG activity was noted up to 100 days postanthesis. Cellulase activity increased in Rutgers fruits prior to the respiratory climacteric and continued to increase thereafter. Similar changes in cellulase activity were also observed in the nonclimacteric rin fruits. Short term ethylene treatment (2 days) of 36-day-old rin fruits increased cellulase activity, but had no effect on PG activity. Detectable changes in other parameters of ripening, such as chlorophyll loss and softening, also occurred prior to the respiratory climacteric. These results suggest that the failure of rin fruits to ripen is related to their low PG activity during maturity as compared with normal fruits.

2 Present address: Department of Horticulture, Division of Vegetable and Flower Crops, College of Agriculture, Shizuoka University, 836 Ohya, Shizuoka 422, Japan.

1 Scientific Paper No. 4911. College of Agriculture Research Center, Washington State University, Pullman. Project No. 0321.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1979 by the American Society of Plant Biologists