FURTHER STUDIES ON THE RNA FUNCTIONAL IN AUXIN ACTION

Avena coleoptile and a respiration-deficient mutant of yeastwhose cells are elongated by the action of auxin in the absenceof GA added were subjected to the phenol method of RNA fractionation."RNA" from the phenol layer promoted the auxin-induced expansionof Jerusalem artichoke tuber slices just as GA did, whereas"RNA" from the water layer was ineffective. The GA-like activityof the former "RNA" was reduced by treatment with RNase or alkali. No active "RNA" was extractable from a respiration-sufficientyeast strain which does not respond to auxin without GA supplemented. (Received August 19, 1964; )