Possible involvement of a glycerophosphate compound in auxin induced growth.

An unknown compound previously extracted from sterile pea stem sections, has been identified as a glycerol and phosphate containing compound with a molecular weight of 5000. The auxin, IAA, has been shown to stimulate the incorporation of (32)P orthophosphate into the compound in five minutes i.e., before the onset of stimulated growth rates.Possible mechanisms underlying auxin induced growth are discussed in the light of the above findings.