Fig. 2.

The time course of the development of senescence in tissues of shoot biomass during and after the summer in three genotypes of cocksfoot: (A) drought-resistant cultivar ‘Kasbah’ (circles); a drought sensitive cultivar ‘Oasis’ (squares) and the ‘Oasis’ × ‘Kasbah’ hybrid, PG325 (triangles) subjected to progressive drought from 31 May to 22 September 2003 (open symbols) or fully irrigated during the same period (closed symbols) in a field experiment when plants were sown in autumn (A) or in spring (B). Bars indicate l.s.d. when differences between genotypes are significant at P < 0·05. Bars at the bottom of the figure refer to irrigated treatments, bars at the top of the figure refer to the drought treatment.