Аннотация:[Character of secondary growth of axial organs in Amaranthus L.]
Development and patterns of meristem activity in an anomalous secondary thickening of axial organs were studied in 10 species of Amaranthus. Secondary growth of the axial organs has been shown to be performed by a more or less wide unipolar meristematic zone. The meristematic zone forms secondary collateral bundles either directly or by means of the bipolar cambium being formed inside it; certain sections of the cambium stop to divide in time and are substituted by sections of the new cambium. The way of forming of the secondary bundles is not the same in different organs and in various stages of development of the meristem of anomalous thickening.