46 



Plant Tissue Culture 



The embryo itself, even up to a fairly late stage 

 of development, is largely or entirely made up of 

 undifferentiated cells. Indeed, in the orchids, 

 Peperomias, and many other plants there is little 

 or no morphological differentiation evident in the 



Fig. 14. Longitudinal section of seed of Peperomia hispidula 

 showing the mature but completely undifferentiated, few-celled 

 embryo. (From Johnson, D. S. 1914. Am. J. Bot. 1: 396, fig. 

 100, 444.) 



