REFERENCES
- Cerceau-Larrival M.TH. and Roland-Heydacker F., 1976.—Ontogénie et ultrastructure de pollens d'Ombellifères, tapis et corps d'Ubisch. C. R. Acad. Sci. Paris, Sér. D, 283: 29–32.
- Dickinson H.G., 1973.—The role of plastids in the formation of pollen grain coatings. Cytobios, 8: 25–40.
- Gori P., 1982.—An ultrastructural investigation of microspores, pollen grains and tapetum in Asparagus officinalis. Phytomorphology, 32: 277–284.
- Gori P. and Ferri S., 1982.—Ultrastructural study of the microspore development in Allium sativum, cl. Piemonte. J. Ultrastr. Res., 79: 341–349.
- Gori P. and Lorito M.,—Ultrastructural features of ontogeny of pollen in Capparis spinosa L. var. inermis. Caryologia, 41: 351–361.
- Gunning B.E.S. and Steer M.W., 1975.—Plant cell biology: an ultrastructural approach. Edward A., London.
- Heslop-Harrison J., 1972.—Sexuality of Angiosperms. Plant Physiol., VIC: 134–271. Academic Press Inc. N.Y. and London.
- Locke M., 1965.—Permeability of insect cuticle to water and lipids. Science, 147: 295–298.
- Mephan R.H. and Lane G.R., 1969.—Formation and development of the tapetal periplasmodium in Tradescantia bracteata. Protoplasma, 68: 175–192.
- Mollenhauer H.H., 1964.—Plastic embedding mixtures for use in electron microscopy. Stain Technol., 39: 111–114.
- Panchaksharappa M.G., Rudramuniyappa C.K. and Hegde R.R., 1985.—A review on recent advances in histochemistry of anther development. J. PI. Sci. Res., 1: 60–83.
- Reynolds E.S., 1963.—The use of lead citrate of high pH as an electron opaque stain in electron microscopy. J. Cell Biol., 17: 208–212.
- Rieder M. and Schonherr J., 1988.—Development of plant cuticles: fine structure and cutin composition of Clivia miniata Reg. leaves. Planta, 174: 127–138.
- Shivanna K.R. and Johri B.M., 1985.—The angiosperm pollen. Structure and function. Wiley Eastern Limited, New Delhi.
- Steer M.W., 1977.—Differentiation of the tapetum in Avena. 1. The cell surface. J. Cell Sci., 25: 125–138.
- Watson M.L., 1958.—Staining of tissue sections for electron microscopy with heavy metals. J. Biophys. Biochem. Cytol., 4: 475–478.
- Went Van J. and Gori P.—The ultrastructure of Capparis spinosa pollen grains. J. Submicr. Cytol. Pathol, (in press.).