Journal of Experimental Botany, Vol. 16, No. 46 (January 1965), pp. 177-181 (8 pages) Results of histochemical tests for cytochrome oxidase activity in four species of Rauwolfia have been reported.

EXCELLENT material for the study of factors controlling cell differentiation may be found in the sclerenchymatous idioblasts present in the leaves of certain higher plants. Outstanding examples of ...