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1 Acta Biochimica Polonica

1 2002

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RFLP analysis of 1-aminocyclopropane-1-carboxylate synthase ACC2 and ACC4 genes from Polish cultivars of tomato

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Jakubowicz M. , Jolkowska J. , Kwapiszewska G. , Krecisz A. , Czerski P.

Acta Biochimica Polonica

2002

tom 49

nr 4

An important trait of tomato is the rate of fruit ripening, strongly dependent on eth- ylene production. The ripening-related ethylene synthesis in tomato is controlled mainly by 1-aminocyclopropane-1-carboxylate synthase LE-ACS2 and LE-ACS4 isoenzymes (Rottmann et al., 1991, J. Mol. Biol. 222: 937; Lincoln et al., 1993, J. Biol. Chem. 268: 19422; Barry etal, 2000, Plant Physiol. 123: 979). In spite of numerous reports on the LE-ACS2 and LE-ACS4 gene expression, only ones considered the genomic organisation each of these genes (Rottmann et al., 1991; Lincoln et al., 1993) reported one copy of each of these genes in tomato cv VF36. In this article we suggest that the genomic organisation of LE-ACS2 and LE-ACSS4 genes may depend on tomato cultivars and may differ from that described by the above authors. The results of Southern analyses of genomic DNAs from 17-day old seedlings (cultivars Jaga, Halicz, Betalux, New Yorker) imply that the genomic organisation of LE-ACS2 and LE-ACS4 genes in Polish cultivars differs from that reported for cv VF36.