1. Barsby TL, Yarrow SA, Shephard JF (1984) Heterokaryon identification through simultaneous fluorescence of tetramethylrhodamine isothiocyanate and fluorescein isothiocyanate labeled protoplasts. Stain Technol 59: 217–220
2. Chen LB (1989) Fluorescent labeling of mitochondria. In: Wang YL, Taylor D (eds) Methods in cell biology, vol 29. Fluorescence microscopy of living cells in culture, part A. Fluorescent analogs, labeling cells, and basic microscopy. Academic Press, San Diego, pp 103–123
3. Ferrari TE, Palmer JE, Widholm J (1975) Monitoring protoplast production from plant cells. Plant Sci Lett 4: 145–147
4. Fowke LC (1989) Ultrastructural studies of plant protoplast fusion. In: Bajaj YPS (ed) Biotechnology in agriculture and forestry, vol 8. Plant protoplasts and genetic engineering I. Springer, Berlin Heidelberg New York, pp 289–303
5. Gahan PB (1984) Plant histochemistry and cytochemistry, Academic Press, London