Growth Substances and Plant Tissue Cultures 685 



10. Schroeder, C. A., and Spector, C. Effect of gibberellic acid and indoleacetic 

 acid on growth of excised fruit tissue. Science. 126: 701, 702. 1957. 



11. Tulecke, W. Arginine-requiring strains of tissue obtained from Ginkgo pollen. 

 Plant Physiol. 35: 19-24. 1960. 



12. Vlitos, A. J., and Meudt, W. Relationship between shoot apex and effect of 

 gibberellic acid on elongation of pea stems. Nature. 180: 284. 1957. 



13. White, P. R. A Handbook of Plant Tissue Culture. 277 pp. The Ronald Press 

 Co., New York. 1943. 



