Abstract

Analysis of the esterase spectra was performed on 27 rice varieties which differ in the duration of the vegetation period (early, medium-, and late-ripening varieties) and in the roots, stem, and leaf blades. Organ-and variety-specific differences were found in 5 esterase loci. Late-ripening rice varieties were characterized by lower resistance to salinization and thickening of crops, but not to higher temperatures. A definite correlation was revealed between these differences and those observed in the tissue-specific esterase spectra. Typical for early and medium-ripening varieties were genotypes with nonzero activity by esterase locus 1 (isoferment with the highest electrophoretic mobility), as well as its expression in various tissues simultaneously.

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