Leaf peroxidase activities in tomato mutants affecting plant morphology

✍ Scribed by G. P. Soressi; E. Gentinetta; M. Odoardi; F. Salamini

• Book ID: 104785146
• Publisher: Springer
• Year: 1974
• Tongue: English
• Weight: 903 KB
• Volume: 12
• Category: Article
• ISSN: 0006-2928
• DOI: 10.1007/bf00486088

✦ Synopsis

The leaf peroxidase activity and the electrophoretic banding pattern of 69 tomato mutants affecting plant morphology have been studied. The zymograms of 63 mutants were normal, and their total peroxidase activities were not correlated with a particular plant or leaf trait. However, six mutations, lyrate x-1521, mottled, olivacea, monstrosa, extreme dwarf, and Curl, are characterized by one or two isozymie bands more intensely stained than in the normal electrophoretic pattern; concomitantly, their total peroxidase activities increase significantly, reaching, in the mutant olivacea, a value forty foM higher than in nonmutant stocks. These abnormal levels of total peroxidase activity are achieved by a promotion of the constitutive bands A5 or C2, singularly or simultaneously. It may be inferred that the six abovementioned mutations influence directly or indirectly the peroxidase activity level without affecting the genes which code for the peroxidase isozymes themselves. Parallels between the mutant effects on specific peroxidase bands and hormonally mediated control of the peroxidase isozymes are discussed.