[The dynamics of abscisic acid and cytokinins content in the leaves of wheat-aegilops lines and their parental forms affected by powdery mildew].

We studied the dynamics of abscisic acid and cytokinins content in wheat-aegilops lines and their parental forms affected by powdery mildew. Lines 95/99i and 56/99i demonstrated the types of resistance untypical of the soft wheat Rodina and Aegilops speltoides k-389 but typical of Ae. speltoides Tausch from other natural habitats.

[Morphological variability of the wheat powdery mildew in the context of its parasitic adaptation to the lines of wheat Aegilops with different resistance].

We studied the interaction between the pathogen and wheat-Aegilops lines with different resistance as well as their parental forms in the course of powdery mildew infection using scanning electron microscopy. Line 51/99i proved to be similar to the parental form, Rodina variety, by the infection progress. The both genotypes featured pronounced adhesion of the primary infection structures to the surface of the plant epidermal cells in addition to formation of large developed colonies of the fungus, which indicates the partners compatibility.

[Influence of phytohormones on development of conidial inoculum of causative agents of the phlox and barley powdery mildew].

We studied the role of phytohormones: zeatin, kinetin, and abscisic acid, in the regulation of development of the conidial inoculum of Erysiphe cichoracearum DC. f. phlogis Jacz.

[Characteristics of halo formation during pathogenesis as a response of cereal epidermal cells to penetration of powdery mildew pathogens].

A cytophysiological study was carried out of the functional status of a halo as a response of the host plant to contact with a powdery mildew pathogen. Interactions of the powdery mildew causative agents with barley, wheat, wheat-wheat-grass hybrids, wheat-aegilops lines, and aegilops with different genotypic resistance lead to the expression of haloes during pathogens, which are induced by infection pegs of the primary growth tubes appressoria, and hyphal lobes. Haloes are visualized using cytochemical reactions to proteins and scanning electron microscopy.