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Polyamine Levels in Petunia Genotypes with Normal and Abnormal Floral Morphologies

Overview
Journal Plant Physiol
Specialty Physiology
Date 1988 Feb 1
PMID 16665918
Citations 9
Authors
A G Gerats
C Kaye
C Collins
R L Malmberg
Affiliations
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Abstract

We characterized the polyamine pathway in Petunia hybrida genotypes that were either wild type or that had been identified as having altered floral morphology. Analysis of four normal morphology lines revealed two patterns of endogenous levels of putrescine and arginine decarboxylase: two with higher levels of putrescine, two with lower levels of putrescine. Analysis of F1 and backcross progeny between high putrescine and low putrescine strains is consistent with their differences being due to a dominant allele for low putrescine content and arginine decarboxylase activity. Four Petunia mutants with floral morphology changes were also screened. One of these mutants, alf, showed high levels of putrescine and high levels of arginine decarboxylase late in development; these high levels were found whether the alf line was present in either of the two types of normal morphology genetic backgrounds that had been characterized.

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