Fig 8. Decreased photoperiod and photosynthesis inhibition by DCMU enhanced the susceptibility of APR genotypes to CCR1.

(A) Two-week-old homozygous Hm1^A and Hm1-3 B73 NIL plants were inoculated with CCR1 and incubated with a shortened photoperiod of 4:20 L:D or longer 14:10 L:D photoperiod. Plants grown under a decreased photoperiod were completely susceptible to CCR1 while control plants were relatively less susceptible. (B) Hm1^A and Hm1-3 B73 NIL plants were grown for two-weeks in the longer photoperiod conditions (14:10 L:D) and half of the plants were sprayed with DCMU, a photosynthesis inhibiting herbicide. Application of DCMU rendered both Hm1^A and Hm1-3 plants highly susceptible to CCR1 compared to control plants. Pictures were taken 6 days after inoculation.