Effect of plant age on IR-BB21 resistance to Xanthomonas oryzae pv. oryzae (Xoo)
1993
Mazzola, M. | Leach, J.E. | Mew, T.W. | White, F.F. (Kansas State Univ., Manhattan KS 66506 (USA). Plant Pathology Dept.)
All cultivars at the seedling stage were susceptible to strain PX099A, and IR-BB 21 and IR24 were susceptible to strain PX086. A hypersensitive resistance response was observed on IR-BB 10 inoculated with PX086. Lesion lengths on IR24 adult plants inoculated with PX099A or PX086 were typical of those for a susceptible reaction. Lesion lengths on IR-BB 10 inoculated with PX099A were similar to those on IR24, but lesions induced by PX086 on IR-BB 10 were significantly shorter than those on IR24. Lesions induced by either Xoo race on adult plants of IR-BB 21 were significantly shorter than those observed on susceptible IR24. Adult rice plants resistant to Xoo have markedly shorter lesions than do susceptible cultivar
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