Effects of host resistance on the development of haustoria and colonies of oat mildew

Annals of Applied Biology - Tập 88 Số 1 - Trang 171-178 - 1978
T.L.W. Carver1, Ambrose Carr1
1Welsh Plant Breeding Station, Plas Gogerddan, Aberystwyth, Dyfed, SY23 3EB

Tóm tắt

SUMMARY

Colony development of Erysiphe graminis f.sp. avenae race 2 was studied on detached leaf segments of a range of Avena hosts with different levels of resistance, none of which possesses known specific gene resistance to this race. Resistance affected the length attained by mature primary haustoria, and also colony size as assessed by numbers of haustoria and conidiophores produced per colony 5 days after inoculation. A more accurate assessment of the size of mature haustoria was provided by the total length of their digitate processes. At the primary haustorium stage resistance affected not only haustorial size, but also haustorial efficiency measured as colony growth per unit size. Adult plant resistance of some hosts decreased haustorial size and/or efficiency in colonies on the fifth in comparison with the first formed leaf.

Từ khóa


Tài liệu tham khảo

BRACKER C. E., 1968, Ultrastructure of the haustorial apparatus of Erysiphe graminis and its relationship to the epidermal cell of barley, Phytopathology, 58, 12

BUSHNELL W. R., 1971, Morphological and Biochemical Events in Plant‐Parasite Interaction, 229

CARVER T. L. W.(1975).Mechanisms of race non‐specific disease resistance in oats to mildew.Ph.D. Thesis University of Wales.

10.1111/j.1744-7348.1977.tb01812.x

CLIFFORD B. C.(1975).Stable resistance to cereal diseases: problems and progress.Report of the Welsh Plant Breeding Station for 1974 pp.107–113.

10.1094/Phyto-62-401

GRAF‐MARIN A., 1934, Studies on powdery mildew of cereals. Memoirs, Cornell University Agricultural Experiment Station, 157, 1

HAYES J. D., 1966, Variation in the pathogenicity of Erysiphe graminis DC. f. sp. avenae, and its relation to the development of mildew‐resistant oat cultivars, Euphytica, 15, 80, 10.1007/BF00024081

HIRATA K., 1960, Observations on the development of young colonies of the barley powdery mildew (Erysiphe graminis hordei Marchal), Transactions of the Mycological Society of Japan, 2, 2

HIRATA K., 1967, Notes on haustoria, hyphae and conidia of the powdery mildew fungus of barley, Erysiphe graminis f. sp. hordei, Memoirs of the Faculty of Agriculture, Niigata University, 6, 207

10.1016/S0007-1536(52)80008-7

10.1111/j.1744-7348.1971.tb04635.x

10.1111/j.1469-8137.1974.tb04613.x

MASRI J. S., 1966, Primary infection of wheat and barley by Erysiphe graminis, Phytopathology, 56, 389

NISHIYAMA K., 1966, Haustorium formation and colony development of the barley powdery mildew fungus, Erysiphe graminis f. sp. hordei, at the primary stage of infection, Niigata Agricultural Science, 18, 26

10.1094/Phyto-63-847

10.1094/Phyto-63-867

10.1094/Phyto-63-1307

SNEDECOR G. W., 1956, Statistical Methods