HORMONAL BALANCE OF IAA ABA IN WHEAT INFE CTED BY SEPTORIOSIS/

The studies of hormonal balance in developing grains and seedling of t wo wheat varieties differing in resistance to Septoria leaf blotch to the given pathogen. During initial phases of pathogen development IAA/ ABA ratio was determined to be moved in direction of the increase of A BA content. In subsequent phases of pathogenesis a shift of IAA/ABA ra tio in direction of higher IAA content was reveled. Significant rise o f this value in the sensitive variety gives evidence of insufficient b alance of metabolic processes in plants. The amplitude of IAA/ABA chan ge in the resistant variety is considerably lower than in the sensitiv e one as compared to the control variant that is why this value may se rve a criterium of estimation of wheat resistance to induced by S. nod orum.