Natural auxins 



350 



Figure 4. lAA content of 

 maize grains at different stages 

 of germination. 



12 2t 36 



Time of germination 



¥8 

 hrj 



embryo (including scutellum) and endosperm and the lAA contents deter- 

 mined independently. The results are summarized in Table 2. It is clear that 

 the estimated lAA contents of the endosperm extracts are of the same order 

 as those of the whole seed extracts, and there is practically no lAA in the 

 endosperm and scutellum at any stage of germination. 



Table 2 

 Extracts from separated endosperms and embryos 

 (a) Endosperms 



{b) Embryos -\-scutellums 



36 



