Can Rusts Fix Nitrogen?

Caldwell et al.1 and Murphy2 have shown that in wheat and oat plants infected with Puccinia triticina and P. coronata respectively, the amount of nitrogen, and of some other substances present, is greater than in uninfected plants. Gretschushnikoff3 found that the rust he studied excreted urea and ammonia, which, he suggested, were removed by the host… (More)