Molecular basis for sexual incompatibility, M.E.Nasrallah; molecular biology of cytoplasmic male sterility, C.S.Levings; developmental regulation of gene expression by light, G.I.Jenkins; control of gene expression in developing seeds, A.Shirsat; regulation and genetic manipulation of tuber formation, M.W.Bevan; regulation of gene expression ripening tomatoes, R.L.Fischer; hormonal regulation of genes, C.M.Lazarus; anthocyanin synthesis and the control of flower colour, J.Mol and A.van Tunen.