[Epigenetic and synergistic types of inheritance of the reproductive characters in angiosperms].
The author considers three types of hereditary memory (structural, cell and signal), that are realized on different levels of biological organization. These three types of hereditary memory correspond to three types of reproduction: self-replication, cell division and reproduction s. str. Reproductive characters are exemplified with three essential characters in angiosperm plants: dimorphism in population by flower sex; mono-, di- and trystyly of flowers; uni- and biparental mode of seed reproduction. All these characters are considered as "supercharacters" that are controlled by gene ensembles. The correspondence between three types of reproduction and three types of hereditary memory are discussed. The authors reviews also the role of polyploidy (auto- and endoploidy) in the inheritance of reproductive condition. From the information theory point the increase in cell ploidy causes the growth of uncertainty in expression of genes and gene ensembles thus creating new type of variability--epigenetic variation. The change of reproductive strategy in plants is regulated by state of gene and gene ensembles and does not demand structural changes in genome. The reproductive characters of plants in spite its complex structure are inherited in number of generations as a discrete Mendel characters by mono-, di-, ot trihybrid schemas.
Maletskiĭ
S I
SI
Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Science, Prosperkt Lavrent'eva 10, Novosibirsk 630090. stas@bionet.nsci.ru
D005075:Biological Evolution; D002455:Cell Division / Q000235:genetics; D044127:Epigenesis, Genetic; D017343:Genes, Plant; D014644:Genetic Variation; D019684:Magnoliopsida / Q000166:cytology / Q000235:genetics / Q000502:physiology*; D011123:Polyploidy; D012098:Reproduction