Abstract
Wheat leaf rust race specific resistance controlling genes (Lr) caused 0.01-0.03 decrease of SAGR = divided first two internodes with stem length. In addition, nitrogen transport in upper parts by those genes was 3-19% higher in comparison to near isogenic lines with nonspecific Lr 22a and Lr 22b genes. RAR (divided root nitrogen content with sum of up ground and root ones) values of Lr16, Lr29 and Lr37 between Lr1, Lr15 or Lr19 and nonspecific genes were explained by hydrolytic stability of endo-proteases responsible for cleaving of glutens disulphide bridges. According to RAR, Lr 34 seemed to be specific Lr gene but increased SAGR as was by nonspecific Lr genes focused SUTs as adequate for its conformity. Two different drought and heat stress respond systems were linked to Lr genes; one based on gluten degradation consequential through photosynthesis decrease and another on accelerated transfer of starch products and water in stem.
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