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Polyamines and plant stress - Activation of putrescine biosynthesis by osmotic shockThe putrescine content of oat leaf cells and protoplasts increases up to 60-fold within 6 hours of exposure to osmotic stress (0.4 to 0.6 molar sorbitol). Barley, corn, wheat, and wild oat leaves show a similar response. Increased arginine decarboxylase activity parallels the rise in putrescine, whereas ornithine decarboxylase remains unchanged. DL-alpha-Difluoromethylarginine, a specific irreversible inhibitor of arginine decarboxylase, prevents the stress-induced rise in increase in arginine decarboxylase activity and putrescine synthesis, indicating the preferential activation of this pathway.
Document ID
19820060915
Document Type
Reprint (Version printed in journal)
Authors
Flores, H. E. (Yale Univ. New Haven, CT, United States)
Galston, A. W. (Yale University New Haven, CT, United States)
Date Acquired
August 10, 2013
Publication Date
September 24, 1982
Publication Information
Publication: Science
Volume: 217
Subject Category
LIFE SCIENCES (GENERAL)
Distribution Limits
Public
Copyright
Other