EurekaMag.com logo
+ Translate

Relatedness and spatial distribution of Armillaria genets infecting red pine seedlings


, : Relatedness and spatial distribution of Armillaria genets infecting red pine seedlings. Phytopathology 84(8): 822-829

Genetic similarity among Armillaria genets responsible for root disease foci in a northern Michigan red pine plantation was investigated. The study plantation was established in 1984 in a clear-cut portion of a 60-yr-old hardwood forest. Armillaria isolates obtained from 87 moribund seedlings were examined. All 87 isolates were identified as A. ostoyae on the basis of mitochondrial DNA (mtDNA) restriction fragment patterns and/or mating interactions with voucher isolates. Independent assays of nuclear DNA restriction fragment patterns and somatic incompatibility groups agreed completely in distinguishing genets at the study site. Given knowledge of the stand history and previous estimates of mycelial growth rates, we conclude that several genets occupying large territories must have been established long before the 1984 stand conversion. Genetic similarity estimates were made by examining 83 nuclear DNA restriction fragment markers in 16 A. ostoyae genets within the plantation and an additional four A. ostoyae genets sampled outside the plantation. Together with data on the distribution of mtDNA types, these nuclear DNA similarity estimates are consistent with the hypotheses that 1) mtDNA (maternal) lineages exist in the local population; 2) members of the population were established by effectively anisogamous sexual mating events; and 3) the breeding population of A. ostoyae at this site extends beyond 1 km.

(PDF 0-2 workdays service)

Accession: 002477474

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Rizzo, D.M.; May, G.; Blanchette, R.A., 1994: Distribution of Armillaria ostoyae genets in a Pinus resinosa-P banksiana forest. Phytopathology 84(10): 1106

Legrand, P.; Ghahari, S.; Guillaumin, J.-Jacques, 1996: Occurrence of genets of Armillaria spp. in four mountain forests in Central France: The colonization strategy of Armillaria ostoyae. Four forests each of 4-8 ha were investigated in Central France: (1) a pure beech stand harboring only the saprophytic species Armillaria gallica and A. cepistipes; (2) a pure beech stand with the same species plus A. ostoyae; (3) an ancient beech...

Gioia, T. de; Ubaldo, R.; Sicoli, G.; Luisi, N., 2003: Occurrence and distribution of Armillaria gallica genets in a declining oak stand of southern Italy. Outbreaks of Armillaria root rot in conifer plantations and declining oak stands (Quercus cerris, Q. pubescens, Q. frainetto) are frequently due to the spread of the fungus in the soil over long periods. This paper examines the occurrence and dist...

Shaw, C.G.I.I., 1977: Armillaria isolates from pine and hardwoods differ in pathogenicity to pine seedlings. Isolates of Armillaria [Armillariella] mellea were obtained from Pinus ponderosa in a stand with severe root rot in Washington and from dead roots of living Salix sp., Corylus cornuta var. californica and Quercus garryana in a healthy pine stand 3...

Shaw, C.G-Iii, 1977: Armillaria mellea isolates from pine and hard woods differ in pathogenicity to pine seedlings. Isolates of A. mellea were obtained from ponderosa pine [Pinus ponderosa] in a pine stand with severe root rot and from willow [Salix sp.], oak [Quercus garryana], and hazel [Corylus cornuta var. californica] in a healthy pine stand 30 km distant....

Rizzo, D.M.; Blanchette, R.A.; May, G., 1995: Distribution of Armillaria ostoyae genets in a Pinus resinoa-Pinus banksiana forest. Canadian Journal of Botany 73: 6-87

Rizzo, D.M.; Blanchette, R.A.; May, G., 1995: Distribution of Armillaria ostoyae genets in a Pinus resinosa - Pinus banksiana forest. Diploid isolates of Armillaria ostoyae were obtained from 278 trees (including stumps, Pinus banksiana seedlings, and hardwood regeneration) and 78 solitary basidiomes on three 50 times 25 m plots (two clearcut and one uncut) in a Pinus resinosa -...

Needham, T.; Burger, J.; Lantagne, D., 1985: Site preparation effects on the spatial distribution of planted loblolly pine seedlings. Forest Service general technical report SO United States Southern Forest Experiment Station: (54) 61-64

Pascual, M.Belén.; Molina-Rueda, J.Jesús.; Cánovas, F.M.; Gallardo, F., 2009: Spatial distribution of cytosolic NADP(+)-isocitrate dehydrogenase in pine embryos and seedlings. Cytosolic NADP(+)-linked isocitrate dehydrogenase (NADP(+)-IDH) is considered the main enzyme catalyzing the production of 2-oxoglutarate for amino acid biosynthesis in plants. We characterized a full-length cDNA encoding the cytosolic NADP(+)-IDH...

Pascual,M.B.; Molina-Rueda,J.J.; Canovas,F.M.; Gallardo,F., 2008: Spatial distribution of cytosolic NADP+-isocitrate dehydrogenase in pine embryos and seedlings. Cytosolic NADP<sup>+</sup>-linked isocitrate dehydrogenase (NADP<sup>+</sup>-IDH) is considered the main enzyme catalyzing the production of 2-oxoglutarate for amino acid biosynthesis in plants. We characterized a full-leng...