References
- Aist , J.C. and Williams , H. 1971 . The cytology and kinetics of cabbage root hair penetration by Plasmodiophora brassicae . Can. J. Bot. , 49 : 2023 – 2034 .
- Barr , D.J.S. 1979 . Morphology and host range of Polymyxa letae and Ligniera pilorum from Ontario and some other areas . Can. J.Pl. Pathol. , 1 : 85 – 94 .
- Beakes , C.W. 1980 . Electron microscopic study of oospore maturation and germination in an emasculata isolate of Saprolegnia ferax 3. Changes in organelle status and association . Can. J. Bot. , 58 : 209 – 221 .
- Breselton , J.P. 1989 . Karyotypic analysis of Ligniera verrucosa (Plasmodiophoromycetes) . Can. J. Bot. , 61 : 1216 – 1218 .
- Grove , S.N. and Racker , C.E. 1978 . Protoplasmic changes during zoospore encystment and cyst germination in Pythium aphanidermatum . Exp. Mycol. , 2 : 58 – 62 .
- Karling , J.S. 1942 . Plasmodiophorales , 58 – 62 . New York City : Published by the author .
- Miller , C.E. 1959 . Studies on the life cycle and taxonomy of Ligniera verrucosa . Ame. J. Bot. , 46 : 725 – 729 .
- Miller , C.E. , Martgin , R.W. and Dylewski , O.P. 1985 . The ultrastructure of plasmodia, sporangia and cytosori of Ligniera verrucosa (Plasmodiophoromycetes) . Can. J. Bot. , 63 : 263 – 273 .
- Reynolds , E.S. 1963 . The use of lead citrate at high pH as an electron opaque stain in electron microscopy . J. Cell. Biol. , 17 : 208
- Spurr , A.R. 1969 . A low‐viscosity epoxy resin embedding medium for electron microscopy . J. Ultrastr. Res. , 6 : 31 – 43 .
- Tommerup , I.C. and Ingram , D.S. 1971 . The life cycle of Plasmodiophora brassicae Woron in Brassica tissue cultures in intact roots . New Phytol. , 70 : 327 – 332 .
- Waterhouse , G.M. 1973 . “ Plasmodiophoromycetes ” . In The Fungi An advanced Treatise , Edited by: Ainsworth , G.C. , Sparrow , F.K. and Sussman , A.S. vol. IV B , 75 – 82 . New York, London : Academic Press .
- Address for correspondence, Santha Devi, Scientist and Head Electron Microscopy Section, National Botanical Research Institute, Lucknow‐226 001, India.