title: [Correlation between growth of callus and a number of nodule for pea Pisum sativum].
abstract: The processes of nodulation and callusing were studied for pea Pisum sativum in a comparative aspect. Seven varieties of pea plants were used. The nodulation was characterized by the number of nodules and their mass per one plant. The frequency ratio of nodules of various weights was described by the Lorentz equation. The growth of callus was described using equation of the S-dependence. It has been shown that plants can produce maximal (optimum for nitrogen fixation) mass of nodules by an increase either in the nodules number or in the mass of each nodule. This feature is specific to the varieties of peas. It has been also found that the plants of the pea varieties, which have a large number of nodules, produce calluses of maximum size. Small calluses are characteristic of the varieties having plants with small amounts of large nodules. The data obtained has been interpreted on the assumption that the nodulation is underlined by both differentiation and proliferation, whereas the callusing is due only to the proliferation process.
authors: Iu P
authors: IuP
authors: Petrov
mesh_terms: D002454:Cell Differentiation; D049109:Cell Proliferation; D009586:Nitrogen Fixation / Q000502:physiology; D018532:Pisum sativum / Q000254:growth & development* / Q000502:physiology; D053204:Root Nodules, Plant / Q000254:growth & development* / Q000502:physiology