Thin- layer chromatography of auxin in barley cultivar “professor schiemann” infected by powdery mildew

Changes in IAA-level during the mildew pathogenesis (Erysiphe graminis f. sp.hordei Marchal) were observed in a resistant barley cultivar “Professor Schiemann” using thin-layer chromatography and biological Avena-test. A decrease in IAA-level occurred on 4th day after the inoculation by parasite, compared with control. On the sixth day, the level of IAA was remarkably increased. During further development, the IAA-level rested, on the whole, without any changes.