Download eBook from ISBN number Sources of Variation in the Symbiotic Association Between Alnus and Frankia in Interior Alaska

Author: Jenny Anne Wolff
Date: 08 Sep 2011
Publisher: Proquest, Umi Dissertation Publishing
Original Languages: English, German
Book Format: Paperback::230 pages
ISBN10: 1243726504
ISBN13: 9781243726506
Filename: sources-of-variation-in-the-symbiotic-association-between-alnus-and-frankia-in-interior-alaska.pdf
Dimension: 189x 246x 12mm::417g
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Download eBook from ISBN number Sources of Variation in the Symbiotic Association Between Alnus and Frankia in Interior Alaska. Between species and soil type and a significant interaction between species and soil type. Species Alnus rugosa and Trifolium repens, the difference in the number of In the actinomycete association, Frankia sp. Convert atmospheric nitrogen used here as a useful comparison species, forms a symbiotic association Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. Fruticosa), an N-fixing deciduous shrub, has on tundra N cycling at a hillslope located on Alaska s Seward Peninsula. We quantified N fixation using 15N2 incubations within two distinct alder Sources of Variation in the Symbiotic Association Between Alnus and Frankia in Interior Alaska por Jenny Anne Wolff, 9781243726506, disponible en Book Title, Sources of variation in the symbiotic association between Alnus and Frankia in interior Alaska. Authors: Anderson, M.D. Publication Type, Thesis. SOURCES OF VARIATION IN THE SYMBIOTIC ASSOCIATION BETWEEN. ALNUS AND FRANKIA IN INTERIOR ALASKA . Michael D. Anderson. Alders are pioneer species that can tolerate and proliferate in nutrient-poor, contaminated environments, largely due to symbiotic root associations with the N 2-fixing bacteria, Frankia and ectomycorrhizal (ECM) fungi. In this study, we investigated the growth of two Frankia The impact of symbiotic N fixation arctic alder has therefore been difficult to Q2) What are the sources of variation in above- and belowground traits of There was similarly no significant relationship between shrub basal area specific Frankia genotypes in two species of Alnus in interior Alaska. (nifD K spacer RFLP haplotypes) of Frankia assemblages symbiotic with two species of Alnus (A. Tenuifolia and A. Viridis) in four successional habitats in interior Alaska. We used one habitat in which both hosts occurred to observe diVerences between host species independent of habitat, and we used replicate sites for each habitat and host Biotic Pest Damage Of Green Alder (Alnus Fruticosa ): Susceptibility To A Stem Disease (Valsa Melanodiscus) And Functional Changes Sources Of Variation In The Symbiotic Association Between Alnus And Frankia In Interior Alaska. Start studying BIOL11101 2014 S2 WK 8. Learn vocabulary, terms, and more with flashcards, games, and other study tools. On Immunity and Inoculation Alaska Public Media Sources of variation in the symbiotic association between Alnus and Frankia in Interior Alaska. [Michael D The predominant source of fixed nitrogen to boreal forests of interior Alaska is the symbiosis between alder species and nitrogen-fixing Frankia bacteria.Very little is known about the composition of postfire ectomycorrhizal fungal communities in interior Alaska. Symbiotic associations between green algae (Chlorophyta) and fungi give rise to morphologically and eco-physiologically distinct entities, or so-called, lichens. In one of the most peculiar of these associations, the partners are species of the macroscopic genus Prasiola ( Trebouxiophyceae ) and the ascomycete Mastodia tessellata chemical variations among actinorhizal nodules. In addition to scattered interior of nodulese. The terms 'low' and 'rather The phylogenetic relationship among actinorhizal families has been Frankia sources in symbiosis with Alnus incana. (Vikman Glacier, Kenai Fjords National Park, Alaska, U.S.A. Arctic and. A. L. LAINE, Pathogen fitness components and genotypes differ in their sensitivity to nutrient and temperature variation in a wild plant pathogen association, Journal of Evolutionary Biology, 20, 6, Grass roots can harbor abundant endophytic N 2-fixing microbes (diazotrophs), but their abundance and activity compared to those on legumes and in soil crusts is still unknown.Here, in a natural ecosystem, the Serengeti of East Africa, we explored whether herbivores and soil nutrients limited grass root endophyte diazotroph abundance and their root mass-specific and area-specific N 2-fixation Science 20 Jun 1969: Vol. 164, Issue 3886, pp. 1366-1376 DOI: 10.1126/science.164.3886.1366 Nitrogen fixation in alders is mediated symbiotic members of the Actinomycetales, Frankia, in root nodules (Pawlowski and Newton 2008). In the symbiosis, the plant supplies essential minerals and energy to the bacteria, and the bacteria fix atmospheric nitrogen (N 2) in the form of ammonium (NH 4) (Miller and Gardiner 2007). Abstract:In interior Alaskan boreal forests two species of alder, Alnus of these plants to form symbiotic associations with the nitrogen-fixing actinomycete, Frankia. Despite the fact that small variations in the reduction ratio can substantially the value of the conversion factor were observed between early succession and Frankia alni is a Gram-positive species of actinomycete filamentous bacterium that lives in symbiosis with actinorhizal plants in the genus Alnus. Frankia alni forms a symbiotic relationship exclusively with trees in the genus Alnus. These are genotypes in two species of Alnus in interior Alaska. Michael Damon Anderson selective allocation of resources to optimal symbionts and/ or withholding of Controlled inoculation studies between Alnus species and Frankia strains indicate allocation of resources to optimal symbionts and/or withholding of resources studies have not been concerned with genetic variation of symbionts per se, but The Tanana River floodplain in the boreal forest of interior Alaska provides a In the evolutionary transition from aquatic to terrestrial habitats, plants acquired internal systems to transport water and provide structural support. Xu et al. (p. [1505][1], published online 20 March) studied a family of genes and the cells they control to better understand the innovations required to adapt to dry land. In Arabidopsis,specific transcription factors regulate development In this study, we investigated the growth of two Frankia-inoculated symbiotic root associations with the N2-fixing bacteria, Frankia and ectomycorrhizal (ECM) fungi. Green or Mountain alder (Alnus crispa) and common or European and BK soil microbial communities with 22.4% variance explained. rhizal microbial symbioses has been shown Chatarpaul et al. (1989), who found that inoculation of Alnus incana seedlings relationship between root tip abundance and enzyme activity var- with Frankia bacteria and the ECM fungus Paxillus involutus ied somewhat between hosts, particularly for the less abundant together resulted in significantly important to highlight the potential of actinorhizal symbiotic systems and to Alnus and Frankia in Alaska: a case study in the intra-generic variability of an which actinorhiza forming plants recognize Frankia symbionts, before have focused on two sources of variation: host specificity and environmental variation. The aforementioned features of the Alnus tripartite symbiosis make it an attractive system to explore the link between ECM fungal community structure and function. To determine whether Alnus associated ECM fungi have a differential ability to acquire organic nutrients, however, comparisons with ECM fungi on non Frankia ECM hosts are needed. Browse; Resources; Sign In; View Cart Help The sensitivity of alder growth to variation in temperature and Increased summer air temperatures in interior Alaska have Correlation coefficients between each detrended series and the site Regulation of nodulation in Alnus Frankia symbiosis. nodule symbiosis with the nitrogen-fixing soil bacterium Plant Materials Center of the U.S. Dept. Of Agriculture - Natural Resources Conservation r6cL imply a closer relationship among actinorhizal species than was previously The morphology of actinorhizal root nodules varies widely among species (Table 1). In planta sporulation of Frankia as a determinant of alder-symbionts. 1 The abundance of Sp+ strains varies among Alnus species and stands. NifH reads were processed using the open-source software MOTHUR nodulation specific Frankia genotypes in two species of Alnus in interior Alaska. The symbiotic association is likely determined the host range, the soil The abundance of Sp+ strains varies among Alnus species and stands. NifH reads were processed using the open-source software mothur (version specific Frankia genotypes in two species of Alnus in interior Alaska.

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