Tetrasomic inheritance of isozymes in sainfoin (Onobrychis viciaefolia scop.)

Article Abstract:

The electrophoretic analysis of self-fertilized sainfoin plants indicates the presence of seven isozymic genes, Pgi-2, Pgm-2, Got-2, Got-3, Got-4, Mdh-2, and Adh-1. Results reveal tetrasomic inheritance of three genes and disomic inheritance of two genes. The duplication of two isozyme genes, however, has no dependence on the polyploidization phenomenon. Genetic analysis of the isozymes indicates autopolyploid origin in sainfoin and an allopolyploid mode of segmentation. The quaternary structure of the enzyme is monomeric for PGM and dimeric for GOT, MDH, and ADH enzyme systems.

Observations, Isoenzymes, Polyploidy, Fertilization of plants, Plant fertilization

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Genetics of isozyme polymorphisms in carnation

Article Abstract:

An analysis of ten enzyme systems for polymorphism in the parents and the progeny of crosses between carnations indicates that nine loci are inherited. The tenth gene, Mmm, appears to be a modifier of the mobility of the isozyme malate dehydrogenase from mitochondria. A study of the expression patterns of the enzymes reveals the presence of ten more monomorphic isozyme genes. Linkages between isozyme loci coded by phosphoglucoisomerase, glutamate-oxalacetate transaminase, and aminopeptidases appear to correspond to a region conserved in plants.

Research, Analysis, Enzymes, Genetic polymorphisms

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The Evergreen gene is essential for flower initiation in carnation

Article Abstract:

A new study of flower initiation in the greenhouse carnation Dianthus caryophyllus shows that the gene known as Evegreen is necessary to ensure that initiation takes place.

Plants, Flowering of, Plant flowering

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