• Arnon, D. I. (1949). Copper enzymes in isolated chloroplasts. Polyphenoloxidase in Beta vulgaris. Pl. Physiol., 24, 1.
  • Bednar, T. W. & Smith, D. C. (1966). Studies in the physiology of lichens. VI. Preliminary studies of photosynthesis and carbohydrate metabolism of the lichen Xanthoria aureola. New Phytol., 65, 211.
  • Birkinshaw, J. H., Charles, J. H. V., Hetherington, A. C. & Raistrick, H. (1931). Studies in the biochemistry of micro-organisms. IX. On the production of mannitol from glucose by species of Aspergillus. Phil. Trans. Roy. Soc. London, B, 220, 153.
  • Dibben, M. J. (1971). Whole-lichen culture in a phytotron. Lichenologist, 5, 1.
  • Dutsch, G. & Rast, D. (1969). Biosynthese von mannitol in Agaricus bisporus. Arch. Microbiol, 65, 195.
  • Farrar, J. F. (1973). Lichen physiology: progress and pitfalls. In: Air Pollution and Lichens (Ed. by Ferry, B. W., Baddeley, M. S. & Hawksworth, D. L., pp. 238282. Athlone Press, London .
  • Farrar, J. F., (1976a). Ecological physiology of the lichen Hypogymnia physodes. II. Effects of wetting and drying cycles and the concept of ‘physiological buffering’. New Phytol., 77, 105.
  • Farrar, J. F. (1976b). The uptake and metabolism of phosphate by the lichen Hypogymnia physodes. New Phytol., 77, 127.
  • Farrar, J. F. & Smith, D. C. (1976). Ecological physiology of the lichen Hypogymnia physodes. III. The importance of the rewetting phase. New Phytol., 77, 115.
  • Harris, G. P. & Kersaw, K. A. (1971). Thallus growth and the distribution of stored metabolites in the phycobiont of the lichens Parmelia sulcata and Parmelia physodes. Can. J. Bot., 49, 1367.
  • Hill, D. J. & Woolhouse, H. W. (1966). Aspects of the autecology of the lichen Xanthoria parietina agg. Lichenologist, 3, 207.
  • Holligan, P. M. & Drew, E. A. (1971). Routine analysis by gas-liquid chromatography of soluble carbohydrates in extracts of plant tissues. II. Quantitative analysis of standard carbohydrates, and the separation and estimation of soluble sugars and polyols from a variety of plant tissues. New Phytol., 70, 271.
  • Lewis, D. H. & Smith, D. C. (1967). Sugar alcohols (polyols) in fungi and green plants. I. Distribution, physiology and metabolism. New Phytol., 66, 143.
  • Loughman, B. C. & Martin, R. F. (1957). Methods and equipment for the study of incorporation of phosphorus by intact barley plants in experiments of short duration. J. Exp. Bot., 8, 272.
  • McMannon, M. & Crawford, R. M. M. (1971). A metabolic theory of flooding tolerance: the significance of enzyme distribution and behaviour. New Phytol., 70, 299.
  • Pearson, L. C. (1970). Varying environmental conditions in order to grow lichens intact under laboratory conditions. Am. J. Bot., 57, 659.
  • Rees, W. R. & Reynolds, T. (1958). A solvent for the paper chromatographic separation of glucose and sorbitol. Nature, Lond., 181, 767.
  • Richardson, D. H. S. & Smith, D. C. (1968). Lichen physiology. IX. Carbohydrate movement from the Trebouxia symbiont of Xanthoria aureola to the fungus. New Phytol., 67, 61.
  • Ried, A. (1960). Thallusbau und Assimilationshaushalt von Laub- und Krustenflechten. Biol. Zbl., 79, 129.
  • Steel, R. G. D. & Torrie, J. H. (1960) Principles and Procedures of Statistics. McGraw-Hill, New York .