Salisbury and Ross, 1978). Each compound is abbreviated GA, with a 

 subscript such as GA., GA 2 , etc., to distinguish the different com- 

 pounds. All could be called gibberellic acid, however, due to the com- 

 mercial availability of GA 3 , it has been studied more extensively than 

 the other forms and is commonly referred to as gibberellic acid (Stuart 

 and Cathey, 1961; Salisbury and Ross, 1978). 



Gibberellic acid (GA.J is a white to pale yellow, crystalline 

 powder, with a molecular weight of 346.37, empirical formula 

 ^19^22^6 anc ^ a cnem '' ca l configuration of 



(Abbott Laboratories, 1962; Barendse, 1974; Lang, 1970; Reeve and 

 Crozier, 1974; Salisbury and Ross, 1978). 



