The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Thomas Wohlgemuth - One of the best experts on this subject based on the ideXlab platform.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:AbstractKey messagePinus sylvestrisseedlings quickly expand their roots to deeper soil layers whilePseudotsuga menziesiiconcentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought.ContextPseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells.AimsWill the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe?MethodsWe measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons.ResultsPinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions.ConclusionFast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:Pinus sylvestris seedlings quickly expand their roots to deeper soil layers while Pseudotsuga menziesii concentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought. Pseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells. Will the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe? We measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons. Pinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions. Fast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
L H Melville - One of the best experts on this subject based on the ideXlab platform.
-
biology of the ectomycorrhizal genus rhizopogon iii influence of co cultured conifer species on mycorrhizal specificity with the arbutoid hosts arctostaphylos uva ursi and arbutus menziesii
New Phytologist, 1997Co-Authors: Randy Molina, Donaraye Mckay, Jane E. Smith, L H MelvilleAbstract:Seedlings of Pseudotsuga menziesii (Mirb.) Franco, Pinus ponderosa Dougl. ex Laws, Arbutus menziesii Pursh., and cuttings of Arctostaphylos uva-ursi (L.) Spreng were grown in monoculture and in conifer-hardwood dual-culture combinations in the glasshouse and inoculated with spore slurries of six Rhizopogon species. The primary objectives were to assess and compare the pattern of host specificity between symbionts and to study the influence of co-cultured plants on ectomycorrhiza development. The Rhizopogon spp. ranged from genus-specific to multiple-host compatible. In monoculture, four Rhizopogon sp. (R. ellenae Smith, R. occidentalis Zeller & Dodge, R. smithii Hosford and R. subcaerulescens Smith) formed ectomycorrhizas with Pinus ponderosa, and two Rhizopogon sp. (R. parksii Smith and R. vinicolor Smith) formed ectomycorrhizas with Pseudotsuga menziesii. None of the fungi tested developed ectomycorrhizas on Arbutus menziesii or Arctostaphylos uva-ursi in monoculture. In dual culture, three of the four Rhizopogon species (R. ellenae, R. occidentalis and R. subcaerulescens) that formed ectomycorrhizas on Pinus ponderosa, formed some ectomycorrhizas on Arbutus menziesii and Arctostaphylos uva-ursi. Rhizopogon parksii and R. vinicolor only formed ectomycorrhizas on Pseudotsuga menziesii.
-
iii influence of co cultured conifer species on mycorrhizal specificity with the arbutoid hosts arctostaphylos uva ursi and arbutus menziesii
1997Co-Authors: Randy M Olina, Ane J E S Mith, L H MelvilleAbstract:summary Seedlings of Pseudotsuga menziesii (Mirb.) Franco, Pinus ponderosa Dougl. ex Laws, Arbutus menziesii Pursh., and cuttings of Arctostaphylos uva-ursi (L.) Spreng were grown in monoculture and in conifer-hardwood dual-culture combinations in the glasshouse and inoculated with spore slurries of six Rhizopogon species. The primary objectives were to assess and compare the pattern of host specificity between symbionts and to study the influence of co-cultured plants on ectomycorrhiza development. The Rhizopogon spp. ranged from genus-specific to multiple-host compatible. In monoculture, four Rhizopogon sp. (R. ellenae Smith, R. occidentalis Zeller & Dodge, R. smithii Hosford and R. subcaerulescens Smith) formed ectomycorrhizas with Pinus ponderosa, and two Rhizopogon sp. (R. parksii Smith and R. vinicolor Smith) formed ectomycorrhizas with Pseudotsuga menziesii. None of the fungi tested developed ectomycorrhizas on Arbutus menziesii or Arctostaphylos uva-ursi in monoculture. In dual culture, three of the four Rhizopogon species (R. ellenae, R. occidentalis and R. subcaerulescens) that formed ectomycorrhizas on Pinus ponderosa, formed some ectomycorrhizas on Arbutus menziesii and Arctostaphylos uva-ursi. Rhizopogon parksii and R. vinicolor only formed ectomycorrhizas on Pseudotsuga menziesii.
Barbara Moser - One of the best experts on this subject based on the ideXlab platform.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:AbstractKey messagePinus sylvestrisseedlings quickly expand their roots to deeper soil layers whilePseudotsuga menziesiiconcentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought.ContextPseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells.AimsWill the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe?MethodsWe measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons.ResultsPinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions.ConclusionFast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:Pinus sylvestris seedlings quickly expand their roots to deeper soil layers while Pseudotsuga menziesii concentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought. Pseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells. Will the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe? We measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons. Pinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions. Fast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
Joseph W. Spatafora - One of the best experts on this subject based on the ideXlab platform.
-
out of western north america evolution of the rhizopogon Pseudotsuga symbiosis inferred by genome scale sequence typing
Fungal Ecology, 2019Co-Authors: Alija Bajro Mujic, Pihan Wang, David S Gernandt, Mingjun Chen, Kentaro Hosaka, Bo Huang, Joseph W. SpataforaAbstract:Abstract Mutual dependence and shared geographic distributions of ectomycorrhizal fungi and their hosts suggest that comigration has had an influential role in the evolution of the ectomycorrhizal symbiosis. To test the hypothesis of comigration of ectomycorrhizal symbionts we conducted a phylogeographic analysis of host specific ectomycorrhizal fungi in genus Rhizopogon sampled throughout the natural range of their Pseudotsuga (Douglas fir) hosts. Low coverage genome assemblies were sequenced for all Rhizopogon species-level clades and a novel data mining method, genome-scale sequence typing, was developed to produce a genome-scale phylogenetic dataset. Phylogenetic and phylogeographic analyses support a single evolutionary origin of the Rhizopogon-Pseudotsuga ectomycorrhizal symbiosis in coastal western North America with a single migration into Asia and two independent migrations east into the North American Intermountain West. Our results suggest that the Rhizopogon-Pseudotsuga ectomycorrhizal symbiosis predates species radiation in Pseudotsuga and that these genera have undergone processes of comigration and codiversification.
-
rhizopogon togasawariana sp nov the first report of rhizopogon associated with an asian species of Pseudotsuga
Mycologia, 2014Co-Authors: Alija Bajro Mujic, Kentaro Hosaka, Joseph W. SpataforaAbstract:Rhizopogon subgenus Villosuli are the only members of the genus known to form an ectomycor- rhizal relationship exclusively with Pseudotsuga. The specificity of this host relationship is unusual in that Rhizopogon is broadly associated with several tree genera within the Pinaceae and relationships with a host genus are typically distributed across Rhizopogon subgenera. Naturally occurring specimens of R. subg. Villosuli have been described only from North American collections, and the unique host relation- ship with Pseudotsuga is demonstrated only for Rhizopogon associated with P. menziesii (Douglas-fir), the dominant species of Pseudotsuga in North America. Species of Pseudotsuga are naturally distrib- uted around the northern Pacific Rim, and Rhizopo- gon associates of other Pseudotsuga spp. are not yet described. Here we present the results of field sampling conducted in P. japonica forests throughout the Japanese archipelago and describe Rhizopogon togasawariana sp. nov., which occurs in ectomycor- rhizal association with P. japonica. Placement of this new species within R. subg. Villosuli is supported by morphological and molecular phylogenetic analysis, and its implications to Pseudotsuga-Rhizopogon bioge- ography are discussed.
Christoph Bachofen - One of the best experts on this subject based on the ideXlab platform.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:AbstractKey messagePinus sylvestrisseedlings quickly expand their roots to deeper soil layers whilePseudotsuga menziesiiconcentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought.ContextPseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells.AimsWill the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe?MethodsWe measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons.ResultsPinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions.ConclusionFast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
-
Root architecture might account for contrasting establishment success of Pseudotsuga menziesii var. menziesii and Pinus sylvestris in Central Europe under dry conditions
Annals of Forest Science, 2016Co-Authors: Barbara Moser, Christoph Bachofen, Jonathan D. Müller, Marek Metslaid, Thomas WohlgemuthAbstract:Pinus sylvestris seedlings quickly expand their roots to deeper soil layers while Pseudotsuga menziesii concentrates its root system in the topsoil, thereby running the risk of desiccation during long dry spells, as indicated by lower survival after simulated summer drought. Pseudotsuga menziesii (Douglas-fir) is regarded as a promising species to maintain the productivity of Central European lowland forests given the projected increase of long dry spells. Will the species be able to regenerate from seed and spread outside plantations in a drier temperate Europe? We measured the relative growth rate, biomass allocation, root architecture, and phenotypic plasticity of Pseudotsuga menziesii seedlings sown in a common garden and grown under current precipitation and prolonged drought, respectively. The species’ competitive ability with respect to Pinus sylvestris L., the most drought-tolerant native conifer in Central Europe, was assessed during three growing seasons. Pinus sylvestris seedlings had higher relative growth rates than did Pseudotsuga menziesii seedlings, first in terms of aboveground biomass and later in terms of shoot height. This resulted in heavier and taller seedlings after three growing seasons under both moist and dry conditions. Shorter vertical roots corresponded with lower survival of Pseudotsuga menziesii seedlings under dry conditions. Fast root proliferation allows Pinus sylvestris seedlings to reach deeper water pools that are less rapidly depleted during transient drought. By contrast, the shallow root system might put Pseudotsuga menziesii seedlings at the risk of desiccation during prolonged dry spells.
