Eric E Conn: Compartmentation of secondary compounds; Alain M Boudet, Gilbert Alibert & G 'erard Marigo: Vacuoles and tonoplast in the regulation of cellular metabolism; R Bligny, P Rebeille, J Guern, J B Martin & R Douce: Phosphate metabolism in intact plant cells; Serge Delrot & Jean-Louis Bonnemain: Membranes in long distance transport; John A Raven: The role of membranes in pH regulation; Heide Schnabl: Membranes and stomatal functions; Ph Matile: Membranes in senescence; Garry C Whitelam, Richard N Napier & Harry Smith: Phytochrome and membranes; G Robinson: Membranes and secretion in higher plants; P Mazliak, A Jolliot & J C Kader: Control of the activities of plant membrane-bound enzymes by their lipid environment; A M Hetherington & A Trewavas: The regulation of the membrane-bound protein kinases by phospholipid and calcium; A Lamant & M Monestiez: Ca 2+ -membrane relationships in the adaptation of plants to excess calcium; Peter Dieter, Bharathi P Salimath & Dieter Marm 'e: The role of calcium and calmodulin in higher plants; Pieter J C Kuiper: The response of plant cell membranes to salinity and low temperature; D James Morr 'e, Barbara Gripshover, Wendy F Boss & Paul J Tuite: Membrane cell-free systems for probing plant growth mechanisms; P H Rubery: Auxin binding and membrane receptors in relation to auxin action and transport; Pierre Benveniste, Mich `ele Bladocha, Marie France Costet & Anne Ehrhard: Use of inhibitors of sterol biosynthesis to study plasmalemma structure and functions; R Scalla & C Gauvrit: Action of herbicides on plant cell membranes; D James Morr 'e: Membranes and compartmentation in regulation of plant functions - concluding comments.