Topographic features associated with loblolly pine decline in central Alabama

Eckhardt, Lori G.; Menard, Roger D.

doi:10.1016/j.foreco.2007.11.036

Cited by 41 publications

(86 citation statements)

References 8 publications

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“…A report of L. truncatum from pine root-infesting beetles in the USA was based only on morphological characters (Eckhardt et al 2007), and needs to be confirmed with sequence data. Interestingly, the authentic L. truncatum (based on the type specimen) has been found in China in low numbers associated with D. valens, an insect introduced from North America (Lu et al 2009a, b).…”

Section: Discussionmentioning

confidence: 99%

“…These reports from the USA and China cast doubts regarding a suggested European origin for the fungus, and this requires further investigation. Although L. truncatum was linked to pine root disease in South Africa, New Zealand, and the USA, the fungus is not considered a primary pathogen (Wingfield and Marasas 1983;Wingfield et al 1988;Eckhardt et al 2007 (Solheim 1986;Viiri 1997;Pashenova et al 2001Pashenova et al , 2004. Upadhyay (1981) treated these two species as synonyms, but several subsequent studies have considered them as distinct (Solheim 1986;Harrington and Cobb 1988;Yamaoka et al 1997;Jacobs et al 1998;Hausner et al 2000).…”

Section: Discussionmentioning

confidence: 99%

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Grosmannia and Leptographium spp. associated with conifer-infesting bark beetles in Finland and Russia, including Leptographium taigense sp. nov.

Linnakoski

Beer

Duong

et al. 2012

Antonie van Leeuwenhoek

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Species of Grosmannia with Leptographium anamorphs include important forest pathogens and agents of blue stain in timber. They are commonly found in association with forest pests, such as bark beetles. During a survey of ophiostomatoid fungi in eastern parts of Finland and neighboring Russia, species belonging to the genus Grosmannia were isolated from 12 different bark beetle species infesting Picea abies and Pinus sylvestris, the most economically important conifers in the region. Identification of these fungi was based on morphology, DNA sequence comparisons for three gene regions and phylogenetic analyses. A total of ten taxa were identified. These belonged to six different species complexes in Grosmannia. The phylogenetic analyses provided an opportunity to redefine the G. galeiformis-, L. procerum-, L. lundbergii-, G. piceiperda-, G. olivacea- and G. penicillata-complexes, and to consider the species emerging from the survey within the context of these complexes. The species included G. galeiformis, G. olivacea, L. chlamydatum, L. lundbergii, L. truncatum and a novel taxon, described here as L. taigense sp. nov. In addition, species closely related to G. cucullata, G. olivaceapini comb. nov., G. piceiperda and L. procerum were isolated but their identity could not be resolved. The overall results indicate that the diversity of Grosmannia species in the boreal forests remains poorly understood and that further studies are needed to clarify the status of several species or species complexes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Grosmannia and Leptographium spp. associated with conifer-infesting bark beetles in Finland and Russia, including Leptographium taigense sp. nov.

Linnakoski

Beer

Duong

et al. 2012

Antonie van Leeuwenhoek

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“…While O. sparsiannulatum has been recovered from the living roots of declining loblolly pine trees, its recovery was infrequent. This suggests that it is not an important contributing factor in southern pine decline (Eckhardt et al 2007;Menard 2007). Virtually no pathogenicity data are available for the members of the O. pluriannulatum complex, but these fungi are not considered to be pathogens (Davidson 1935;Hedgcock 1906).…”

Section: Discussionmentioning

confidence: 99%

“…Loblolly pine roots were excavated at Fort Benning Military Reservation, Georgia, USA, using a two-lateral root sampling approach described by Otrosina et al (1999) and modified by Eckhardt et al (2007). Roots were surface disinfested in a solution of ethanol, commercial bleach, and distilled water (80:10:10, v:v:v), rinsed in tap water, and then plated on malt extract agar (MEA, 20 g malt extract, 15 g agar/L) and MEA amended with cycloheximide and streptomycin (CSMA) (Zhou et al 2004a).…”

Section: Isolation Of Fungimentioning

confidence: 99%

A new Ophiostoma species from loblolly pine roots in the southeastern United States

et al. 2010

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During the course of a survey of fungi in loblolly pine (Pinus taeda) roots in Georgia, USA, a species of Ophiostoma morphologically similar to O. pluriannulatum, was isolated. Morphological characteristics and DNA sequence comparisons were used to identify the fungus. The isolates produced perithecia with unusually long necks similar to those of O. pluriannulatum but they had few or no annuli. DNA sequences for the ribosomal internal transcribed spacer regions 1 and 2 were identical to those of O. pluriannulatum. Sequence data of the β-tubulin gene region revealed the absence of intron 4 and presence of intron 5, distinguishing the isolates from O. pluriannulatum, which has intron 4 but not intron 5. Phylogenetic analyses of the β-tubulin sequences showed that the isolates from loblolly pine roots grouped together in a lineage distinct from O. multiannulatum and O. subannulatum, both of which lack intron 4 and have intron 5. The fungus is consequently described as O. sparsiannulatum sp. nov., a novel taxon in the O. pluriannulatum complex.

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“…In the 1950's, Brown and McDowell [8] observed the decline of mature P. taeda stands in Talladega National Forest in Alabama and since then numerous studies have been performed to find causality of the decline as well as detect the phenomena at the landscape level [9][10][11][12][13][14][15]. Detection of SPD might be difficult as aboveground symptoms in mature trees (short chlorotic needles, sparse crowns, reduced radial growth, tree morality) occur following root damage and mortality associated with as variability in water availability increases and (2) Loblolly pine families selected for their tolerance to root-infecting ophiostomatoid fungi would be more tolerant to changes in water availability.…”

Section: Introductionmentioning

confidence: 99%

Simulated Summer Rainfall Variability Effects on Loblolly Pine (Pinus taeda) Seedling Physiology and Susceptibility to Root-Infecting Ophiostomatoid Fungi

Chieppa

Eckhardt

Chappelka

2017

Forests

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Abstract:Seedlings from four families of loblolly pine (Pinus taeda L.) were grown in capped open-top chambers and exposed to three different weekly moisture regimes for 13 weeks. Moisture regimes varied in intensity and frequency of simulated rainfall (irrigation) events; however, the total amounts were comparable. These simulated treatments were chosen to simulate expected changes in rainfall variability associated with climate change. Seedlings were inoculated with two root-infecting ophiostomatoid fungi associated with Southern Pine Decline. We found susceptibility of loblolly pine was not affected by water stress; however, one family that was most sensitive to inoculation was also most sensitive to changes in moisture availability. Many studies have examined the effects of drought (well-watered vs. dry conditions) on pine physiology and host-pathogen interactions but little is known about variability in moisture supply. This study aimed to elucidate the effects of variability in water availability, pathogen inoculation and their interaction on physiology of loblolly pine seedlings.

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Topographic features associated with loblolly pine decline in central Alabama

Cited by 41 publications

References 8 publications

Grosmannia and Leptographium spp. associated with conifer-infesting bark beetles in Finland and Russia, including Leptographium taigense sp. nov.

Grosmannia and Leptographium spp. associated with conifer-infesting bark beetles in Finland and Russia, including Leptographium taigense sp. nov.

A new Ophiostoma species from loblolly pine roots in the southeastern United States

Simulated Summer Rainfall Variability Effects on Loblolly Pine (Pinus taeda) Seedling Physiology and Susceptibility to Root-Infecting Ophiostomatoid Fungi

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