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Host relationships of fusiform rust disease: I. Infection and pycnial production on slash pine and nearby tropical relatives

Doudrick, R.L.; Schmidtling, R.C.; Nelson, C.D.

Silvae Genetica 45(2-3): 142-149

1996

ISSN/ISBN: 0037-5349
Accession: 008783490
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Seedlings from 8 sources of slash pine (Pinus elliottii var. elliottii and var densa) and from 2 sources each of Caribbean pine (P. caribaea var. caribaea) and West Indian pine (P. occidentalis) were inoculated using inocula obtained from 2 sources of Cronartium quercuum f. sp. fusiforme, the causal agent of fusiform rust disease. The percentage of infection, evident primarily as galls and sporulation of pycnia of C. q. fusiforme, differed significantly within sources of slash pine and among species. The percentage of infection of all inoculated shoots was highest on slash pine (P. e. densa) seedlings from south Florida (92%) and lowest on P. occidentalis (30%). Among slash pine seedlings, the general trend was more pycnia sporulation on seedlings from sources nearest the origins of inocula, with the only exception being on those of P. e. densa from the most southern source, which showed abundant sporulation of pycnia similar to seedlings P. c. caribaea from a nearby source. No sporulation occurred on seedlings of P. occidentalis. Differences among families within sources of slash pine were significant for percentages of infection and sporulation of pycnia on all shoots inoculated using C. q. fusiforme. Because sporulation of pycnia is a prerequisite for fecundity in C. q. fusiforme, the results suggest strong selection on natural inoculum for infection and fertility among and within sources of slash pine. Breeding strategies currently recognize families of slash pine that minimize damage due to fusiform rust disease, but new strategies might consider limiting pathogen reproduction.

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Related References

Nelson, C.D.; Schmidtling, R.C.; Doudrick, R.L. 1996: Host relationships of fusiform rust disease: II. Genetic variation and heritability in typical and South Florida varieties of slash pine Silvae Genetica 45(2-3): 149-153
Froelich, R.C.; Schmidtling, R.C. 1998: Survival of slash pine having fusiform rust disease varies with year of first stem infection and severity Southern Journal of Applied Forestry 22(2): 96-100
Rockwood, D.L. 1974: Cortical monoterpene and fusiform rust resistance relationships in Slash Pine Phytopathology 64(7): 976-979
Squillace, A.; Layton, P.; Goddard, R. 1983: Relation between height and fusiform rust infection in slash pine Proceedings of the Southern Forest Tree Improvement Conference: 3? (39) 262-270
Burns, P.; Hu, S.; Awang, J. 1981: Relationship of fusiform rust infection to intensive culture of slash pine Forest Service general technical report SO United States Southern Forest Experiment Station: 4) 366-369
Dudley Huber; Henry Amerson 2011: Performance of the loblolly pine fusiform rust disease resistance gene (Fr1) in a slash Xloblolly pine hybrid family Tree Genetics and Genomes 7(3): 535-540
Sohn, S.I.; Goddard, R.E. 1979: Influence of infection percent on improvement of fusiform rust resistance in slash pine Silvae Genetica 28(5/6): 173-180
Froelich, R.; Nance, W.; Snow, G. 1981: Growth of slash pine seedlings and saplings after infection with the fusiform rust fungus Phytopathology 71(8): 875
Snow, G.A.; ]ewell, F.F.; Eleuterius, L.N. 1963: Apparent recovery of slash and loblolly pine seedlings from fusiform rust infection Plant Dis Reptr 47(4): 318-319
Dinus, R.J.; Snow, G.A.; Griggs, M.M. 1975: Fusiform rust infection and recovery of slash pine vary with inoculum density Proceedings of the American Phytopathological Society 2: 133
Squillace, A.E. 1976: Geographic patterns of fusiform rust infection in loblolly and slash pine plantations USDA Forest Service Research Note, Southeastern Forest Experiment Station (SE-232): 4
Doudrick, R.L.; Nelson, C.D. 1993: Complementary genetic interaction in fusiform rust disease on slash pine Phytopathology 83(12): 1415
Chappelka, A.I.; Schmidt, R. 1981: The phenology of aeciospore production by fusiform rust on slash pine in north Florida and south Georgia IMPAC reports US Forest Service Southeastern Forest Experiment Station 6(1)
Griggs, M.M.; Nance, W.L.; Dinus, R.J. 1978: Analysis and comparison of fusiform rust disease progress curves for 5 slash pine families Phytopathology 68(11): 1631-1636
Froelich, R.C. 1989: Annual variation in fusiform rust infection of slash and loblolly pine seed lots in time replicated plantings Canadian Journal of Forest Research 19(12): 1531-1537
Stelzer, H.E.; Doudrick, R.L.; Kubisiak, T.L.; Nelson, C.D. 1999: Prescreening Slash Pine and Cronartium Pedigrees for Evaluation of Complementary Gene Action in Fusiform Rust Disease Plant Disease 83(4): 385-389
Schmidtling, R.C.; Hipkins, V. 2001: Evolutionary relationships of slash pine (Pinus elliottii) with its temperate and tropical relatives Southern African Forestry Journal 190: 73-78
Belanger, R.; Miller, T.G.dbee, J. 1985: Fusiform rust: guidelines for selective cutting of rust-infected trees in merchantable slash pine plantations Forest Service general technical report SO United States Southern Forest Experiment Station: (56) 254-257
Schmitt, D.; Snyder, E.B. 1971: Nanism and fusiform rust resistance in slash pine g x shortleaf pine g hybrids Forest Science 17(3): 274-278
Walterscheidt, M.J.; Vanarsdel, E.P. 1976: Distribution of fusiform rust on slash pine and loblolly pine in texas Plant Disease Reporter 60(8): 718-720