Cover illustration: (Photograph 1) Bread wheat grown with (bottom) and without (top) irrigation at Woburn in the UK. Candidate genes that may be important in developing crops with high stable yield under drought are being validated by TILLING. (See Parry et al., pp. 2817-2825.). (Photograph 2) Over-expression of the Calvin cycle plastid transketolase in tobacco was expected to increase carbon fixation and yield but these plants developed a chlorotic phenotype and grew slower than the wild type. Chlorophyll fluorescence (Fv/Fm) showing a reduction in maximum efficiency of PSII in transgenic tobacco overexpressing plastid transketolase. (Photographs by S Lefebvre and C Raines.)
[Table of Contents]