Document Detail

Promotion by gibberellic Acid of polyamine biosynthesis in internodes of light-grown dwarf peas.
MedLine Citation:
PMID:  16662137     Owner:  NLM     Status:  PubMed-not-MEDLINE    
When gibberellic acid (GA(3); 5-35 micrograms per milliliter) is sprayed on 9-day-old light-grown dwarf Progress pea (Pisum sativum) seedlings, it causes a marked increase in the activity of arginine decarboxylase (ADC; EC in the fourth internodes. The titer of putrescine and spermidine, polyamines produced indirectly as a result of ADC action, also rises markedly, paralleling the effect of GA(3) on internode growth. Ammonium (5-hydroxycarvacryl) trimethyl chloride piperidine carboxylate (AMO-1618; 100-200 micrograms per milliliter) causes changes in the reverse direction for enzyme activity, polyamine content, and growth. GA(3) also reverses the red-light-induced inhibition of ADC activity in etiolated Alaska pea epicotyls; this is additional evidence for gibberellin-light interaction in the control of polyamine biosynthesis. The enzyme ornithine decarboxylase (ODC; EC, an alternate source of putrescine arising from arginine, is not increased by GA(3) or by AMO-1618.The results support the hypothesis that ADC and polyamine content are important regulators of plant growth.
Y R Dai; R Kaur-Sawhney; A W Galston
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  69     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  1982 Jan 
Date Detail:
Created Date:  2010-06-29     Completed Date:  2010-06-29     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  103-6     Citation Subset:  -    
Department of Biology, Yale University, New Haven, Connecticut 06511.
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