The molecular biology of cauliflower mosaic virus and its application as plant gene vector, B. Gronenborn; the structure, expression, functions and possible exploitation of geminivirus genomes, J.W. Davies et al; cDNA cloning of plant RNA viruses and viroids, P. Vos; agroinfection, N. Grimsley and D. Bisaro; the mechanism of T-DNA transfer from agrobacterium tumefaciens to the plant cell, Z. Koukolikova-Nicola et al; molecular analysis of root induction by agrobacterium rhizogenes, F.F. White and V. Sinkar; pathways to plant genetic manipulation employing agrobacterium, S.G. Rogers and H. Klee; plant transposable elements - unique structures for gene tagging and gene cloning, U. Wienand and H. Saedler; direct gene transfer to plants, R.D. Shillito et al; microinjection - an experimental tool for studying and modifying plant cells, B.L.A. Miki et al; transformation of Chl amydomonas, J.-D. Rochaix; induction of expression in and stable transformation of an algal cell by nuclear microinjection with naked DNA, H.-G. Schweiger et al; transient expression of DNA in plant cells, M. Fromm and V. Walbot; plastid transformation - a progress report, M.J. Cornelissen et al; targeting nuclear gene products into chloroplasts, L.J. Szabo and A.R. Cashmore.