The effect of spraying dry bread yeast suspension on the vegetative growth characteristics of plant Cultivars Catharanthus roseus (L) G. DON.

Abstract

A pot experiment was conducted during the growing seasons 2013/2014 and 2014/2015 In Facuilty of Agriculture, Mansoura University, Egypt to study the effect of yeast extract at a concentration of 4 and 8 gL^-1  on some growth characteristics of Catharanthus roseus, cultivars  rosea and alba. The results of the study indicated that measures of growth represented by the plant, plant height, No. of leaves, leaf dimensions, leaf area were significantly higher in control plant of cv rosea compared with cv alba. yeast extract at both levels increased growth parameters in both cvs, with the lower level 4 gL^-1 the most effective for enhancing growth of the above-ground organs whereas the higher one 8 gL^-1 was the most effective for enhancing gro4wth of the roots. It was concluded that cultivation of the Rosea is preferred over cv alba because of its superior growth characteristics, Also, the treatment with yeast extract in the form of foliar spray can be used to increase and improve the growth characteristics of Catharanthus roseus plant.