Cytoembryological studying of triploid plants of maize

Structure peculiarity of embryo sacs and pollen of hybrid triploid plants in maize was investigated. It is shown first of all that triploid level of the studied plants is the bottom of abnormal gametophytes development. It is supposed that some specific changes can be caused by present of the parthenogenetic line AT-1 genome. This line was used as a pollinator by triploid plants creating.

Characteristics of reproductive features Hedysarum grandiflorum (Fabaceae) in southern of the Volga Uplands

In field seasons 2007–2014 studies have been conducted reproductive scope Hedysarum grandiflorum which grows in the southern of the Volga Upland within the administrative borders of the Saratov region. The features, variability and the plasticity of phytocoenotic external morphological characters of pollen, fruits and seeds of sweetvetch are studied. Potential and real seed productivity are identified. The optimal temperature of sprouting of seeds and the dependence of sprouting and energy of sprouting of seeds from the keeping period are detected.