SCANNING ELECTRON MICROSCOPY OF THE STEM OF CUT FLOWERS OF ROSA CV. SONIA AND GERBERA CV. FLEUR
Scanning electron microscopic observations have been made of transverse and longitudinal cross-sections of xylem vessels of cut flowers of Rosa and Gerbera. Flowers were collected after a vase life of max. 24 hr and different vase waters were used for this incubation period. Flowers were incubated in: sterile tap water, pure submerged cultures of Bacillus sp., Fusarium sp., and Kluyveromyces sp. respectively up to a max. of 5 x 107 cells per ml of vase water. Electron micrographs of stem sections were taken in a Jeol 35C scanning electron microscope at 15 kV accelerating voltage. We found a preferential clotting of the micro-organisms on the cut cross-section of the flower stem submerged and incubated in the vase water. This clotting could be responsible for a decrease in the water uptake of the flower. A positive correlation was found between the number of micro-organisms in the vase water and the vase life of the flowers.
CLERKX, ANKE C.M., BOEKESTEIN, A. and PUT, H. M.C. (1989). SCANNING ELECTRON MICROSCOPY OF THE STEM OF CUT FLOWERS OF ROSA CV. SONIA AND GERBERA CV. FLEUR. Acta Hortic. 261, 97-106