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Dataset results
45 results for “Pinus contorta”
Pinus contorta (Pinaceae) - cone - female - closed
Image of Pinus contorta (Pinaceae) - cone - female - closed
Pinus contorta (Pinaceae) - cone - female - closed
Image of Pinus contorta (Pinaceae) - cone - female - closed
Pinus contorta (Pinaceae) - cone - female - closed
Image of Pinus contorta (Pinaceae) - cone - female - closed
Pinus contorta (Pinaceae) - whole tree - view up trunk
Image of Pinus contorta (Pinaceae) - whole tree - view up trunk
Pinus contorta (Pinaceae) - whole tree - general
Image of Pinus contorta (Pinaceae) - whole tree - general
Pinus contorta (Pinaceae) - whole tree - general
Image of Pinus contorta (Pinaceae) - whole tree - general
Pinus contorta (Pinaceae) - bark - of a large tree
Image of Pinus contorta (Pinaceae) - bark - of a large tree
Pinus contorta (Pinaceae) - leaf - entire needle
Image of Pinus contorta (Pinaceae) - leaf - entire needle
Pinus contorta (Pinaceae) - whole tree - general
Image of Pinus contorta (Pinaceae) - whole tree - general
Pinus contorta (Pinaceae) - bark - of a small tree or small branch
Image of Pinus contorta (Pinaceae) - bark - of a small tree or small branch
Pinus contorta (Pinaceae) - twig - showing attachment of needles
Image of Pinus contorta (Pinaceae) - twig - showing attachment of needles
Pinus contorta (Pinaceae) - cone - male
Image of Pinus contorta (Pinaceae) - cone - male
Pinus contorta (Pinaceae) - cone - female - mature open
Image of Pinus contorta (Pinaceae) - cone - female - mature open
Pinus contorta (Pinaceae) - cone - female - closed
Image of Pinus contorta (Pinaceae) - cone - female - closed
Pinus contorta (Pinaceae) - cone - female - mature open
Image of Pinus contorta (Pinaceae) - cone - female - mature open
Pinus contorta (Pinaceae) - cone - male
Image of Pinus contorta (Pinaceae) - cone - male
Dataset: Lodgepole pine Pinus contorta Douglas ex Loudon invasion in subarctic Iceland: evidence from a long-term study.
<p>This dataset supports the paper <em>Lodgepole Pine (Pinus contorta Douglas ex Loudon) Invasion in Subarctic Iceland: Evidence from a Long-Term Study</em>, published in <em>NeoBiota</em>. It includes the following files:</p> <ol> <li><strong>Point_data_distribution.csv</strong>: Contains distribution point data for <em>Pinus contorta</em> in Steinadalur, using the WGS 84 coordinate reference system (EPSG:4326).</li> <li><strong>Plot_data_pinus.csv</strong>: provides data on plant species richness within study plots.</li> <li><strong>Transects_data.csv</strong>: Includes information on the density of <em>P. contorta</em> along transects.</li> </ol>
Comparative gene expression analysis reveals mechanism of Pinus contorta response to the fungal pathogen Dothistroma septosporum
<p>Many conifers have distributions that span wide ranges in both biotic and abiotic conditions, but the basis of response to biotic stress has received much less attention than response to abiotic stress. In this study,<span> w</span>e investigated the gene expression response of lodgepole pine (<i>Pinus contorta</i>) to attack by the fungal pathogen <i>Dothistroma septosporum</i>, which causes <i>Dothistroma </i>needle blight (DNB), a disease that has caused severe climate-related outbreaks in northwestern British Columbia. We inoculated tolerant and susceptible pines with two <i>D. septosporum</i> isolates and analyzed the differentially expressed genes, differential exon usage, and co-expressed gene modules using RNA-seq data. We found a rapid and strong transcriptomic response in tolerant lodgepole pine samples inoculated with one <i>D. septosporum</i> isolate, and a late and weak response in susceptible samples inoculated with another isolate. We mapped 43 of the DEG- or gene-module-identified genes to the reference plant-pathogen interaction pathway deposited in KEGG database. These genes are present in PAMP-triggered and effector-triggered immunity pathways, including genes encoding mitogen-activated protein kinase and disease resistance protein. Genes comprising pathways and gene modules had signatures of strong selective constraint, while the highly expressed genes in tolerant samples appear to have been favored by selection to counterattack the pathogen. We identified candidate resistance genes that may respond to <i>D. septosporum</i> effectors. Taken together, our results show that gene expression response to <i>D. septosporum</i> infection in lodgepole pine varies both among tree genotypes and pathogen strains, and involves both known candidate genes and a number of genes with previously unknown functions.</p>
Data from: Post-fire changes in forest carbon storage over a 300-year chronosequence of Pinus contorta-dominated forests
A warming climate may increase the frequency and severity of stand-replacing wildfires, reducing carbon (C) storage in forest ecosystems. Understanding the variability of post-fire C cycling on heterogeneous landscapes is critical for predicting changes in C storage with more frequent disturbance. We measured C pools and fluxes for 77 lodgepole pine (Pinus contorta Dougl. ex Loud var. latifolia Engelm.) stands in and around Yellowstone National Park (YNP) along a 300-year chronosequence to examine how quickly forest C pools recover after a stand-replacing fire, their variability through time across a complex landscape, and the role of stand structure in this variability. Carbon accumulation after fire was rapid relative to the historical mean fire interval of 150-300 years, recovering nearly 80% of pre-fire C in 50 years and 90% within 100 years. Net ecosystem carbon balance (NECB) declined monotonically from 160 g C m-2 yr-1 at age 12 to 5 g C m 2 yr-1 at age 250, but was never negative after disturbance. Decomposition and accumulation of dead wood contributed little to NECB relative to live biomass in this system. Aboveground net primary productivity was correlated with leaf area for all stands, and the decline in aboveground net primary productivity with forest age was related to a decline in both leaf area and growth efficiency. Forest structure was an important driver of ecosystem C, with ecosystem C, live biomass C, and organic soil C varying with basal area or tree density in addition to forest age. Rather than identifying a single chronosequence, we found high variability in many components of ecosystem C stocks through time; a > 50% random subsample of the sampled stands was necessary to reliably estimate the non-linear equation coefficients for ecosystem C. At the spatial scale of YNP, this variability suggests that landscape C develops via many pathways over decades and centuries, with prior stand structure, regeneration, and within-stand disturbance all important. With fire rotation projected to be < 30 years by mid century in response to a changing climate, forests in YNP will store substantially less C (at least 4.8 kg C/m2 or 30% less).
Data from: Conservation and divergence of gene expression plasticity following c. 140 million years of evolution in lodgepole pine (Pinus contorta) and interior spruce (Picea glauca × Picea engelmannii)
Species respond to environmental stress through a combination of genetic adaptation and phenotypic plasticity, both of which may be important for survival in the face of climatic change. By characterizing the molecular basis of plastic responses and comparing patterns among species, it is possible to identify how such traits evolve. Here, we use de novo transcriptome assembly and RNA-seq to explore how patterns of gene expression differ in response to temperature, moisture, and light regime treatments in lodgepole pine (Pinus contorta) and interior spruce (a natural hybrid population of Picea glauca and Picea engelmannii). We found wide evidence for an effect of treatment on expression within each species, with 6,413 and 11,658 differentially expressed genes identified in spruce and pine, respectively. Comparing patterns of expression among these species, we found that 74% of all orthologs with differential expression had a pattern that was conserved in both species, despite 140 million years of evolution. We also found that the specific treatments driving expression patterns differed between genes with conserved vs. diverged patterns of expression. We conclude that natural selection has likely played a role in shaping plastic responses to environment in these species.
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