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Eucalyptus grandis

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https://www.readbyqxmd.com/read/28731478/role-of-plant-fungal-nutrient-trading-and-host-control-in-determining-the-competitive-success-of-ectomycorrhizal-fungi
#1
Sara Hortal, Krista Lynn Plett, Jonathan Michael Plett, Tom Cresswell, Mathew Johansen, Elise Pendall, Ian Charles Anderson
Multiple ectomycorrhizal fungi (EMF) compete to colonise the roots of a host plant, but it is not known whether their success is under plant or fungal control, or a combination of both. We assessed whether plants control EMF colonisation by preferentially allocating more carbon to more beneficial partners in terms of nitrogen supply or if other factors drive competitive success. We combined stable isotope labelling and RNA-sequencing approaches to characterise nutrient exchange between the plant host Eucalyptus grandis and three Pisolithus isolates when growing alone and when competing either indirectly (with a physical barrier) or directly...
July 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28687330/identification-of-peg-induced-water-stress-responsive-transcripts-using-co-expression-network-in-eucalyptus-grandis
#2
Modhumita Ghosh Dasgupta, Veeramuthu Dharanishanthi
Ecophysiological studies in Eucalyptus have shown that water is the principal factor limiting stem growth. Effect of water deficit conditions on physiological and biochemical parameters has been extensively reported in Eucalyptus. The present study was conducted to identify major polyethylene glycol induced water stress responsive transcripts in Eucalyptus grandis using gene co-expression network. A customized array representing 3359 water stress responsive genes was designed to document their expression in leaves of E...
July 4, 2017: Gene
https://www.readbyqxmd.com/read/28686690/shifts-in-the-bacterial-community-composition-along-deep-soil-profiles-in-monospecific-and-mixed-stands-of-eucalyptus-grandis-and-acacia-mangium
#3
Arthur Prudêncio de Araujo Pereira, Pedro Avelino Maia de Andrade, Daniel Bini, Ademir Durrer, Agnès Robin, Jean Pierre Bouillet, Fernando Dini Andreote, Elke Jurandy Bran Nogueira Cardoso
Our knowledge of the rhizosphere bacterial communities in deep soils and the role of Eucalyptus and Acacia on the structure of these communities remains very limited. In this study, we targeted the bacterial community along a depth profile (0 to 800 cm) and compared community structure in monospecific or mixed plantations of Acacia mangium and Eucalyptus grandis. We applied quantitative PCR (qPCR) and sequence the V6 region of the 16S rRNA gene to characterize composition of bacterial communities. We identified a decrease in bacterial abundance with soil depth, and differences in community patterns between monospecific and mixed cultivations...
2017: PloS One
https://www.readbyqxmd.com/read/28662679/evaluating-the-accuracy-of-genomic-prediction-of-growth-and-wood-traits-in-two-eucalyptus-species-and-their-f1-hybrids
#4
Biyue Tan, Dario Grattapaglia, Gustavo Salgado Martins, Karina Zamprogno Ferreira, Björn Sundberg, Pär K Ingvarsson
BACKGROUND: Genomic prediction is a genomics assisted breeding methodology that can increase genetic gains by accelerating the breeding cycle and potentially improving the accuracy of breeding values. In this study, we use 41,304 informative SNPs genotyped in a Eucalyptus breeding population involving 90 E.grandis and 78 E.urophylla parents and their 949 F1 hybrids to develop genomic prediction models for eight phenotypic traits - basic density and pulp yield, circumference at breast height and height and tree volume scored at age three and six years...
June 29, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28611454/integrated-analysis-and-transcript-abundance-modelling-of-h3k4me3-and-h3k27me3-in-developing-secondary-xylem
#5
Steven G Hussey, Mattheus T Loots, Karen van der Merwe, Eshchar Mizrachi, Alexander A Myburg
Despite the considerable contribution of xylem development (xylogenesis) to plant biomass accumulation, its epigenetic regulation is poorly understood. Furthermore, the relative contributions of histone modifications to transcriptional regulation is not well studied in plants. We investigated the biological relevance of H3K4me3 and H3K27me3 in secondary xylem development using ChIP-seq and their association with transcript levels among other histone modifications in woody and herbaceous models. In developing secondary xylem of the woody model Eucalyptus grandis, H3K4me3 and H3K27me3 genomic spans were distinctly associated with xylogenesis-related processes, with (late) lignification pathways enriched for putative bivalent domains, but not early secondary cell wall polysaccharide deposition...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28546652/chimpanzees-pan-troglodytes-flexibly-use-introduced-species-for-nesting-and-bark-feeding-in-a-human-dominated-habitat
#6
Maureen S McCarthy, Jack D Lester, Craig B Stanford
As habitat loss and fragmentation place growing pressure on endangered nonhuman primate populations, researchers find increasing evidence for novel responses in behavior. In western Uganda between the Budongo and Bugoma Forests, chimpanzees (Pan troglodytes schweinfurthii) inhabit a mosaic landscape comprising forest fragments, human settlements, and agricultural land. We recorded nests and feeding evidence of unhabituated chimpanzees in this region over a 12-mo period. We found extensive evidence of nesting in introduced tree species, including eucalyptus (Eucalyptus grandis), guava (Psidium guajava), cocoa (Theobroma cacao), and Caribbean pine (Pinus caribaea)...
2017: International Journal of Primatology
https://www.readbyqxmd.com/read/28535596/leaf-litter-leachate-concentration-promotes-heterotrophy-in-freshwater-biofilms-understanding-consequences-of-water-scarcity
#7
Aingeru Martínez, John Stephen Kominoski, Aitor Larrañaga
Climate change is increasing overall temporal variability in precipitation resulting in a seasonal water availability, both increasing periods of flooding and water scarcity. During low water availability periods, the concentration of leachates from riparian vegetation increases, subsequently increasing dissolved organic matter (DOM). Moreover, shifts in riparian vegetation by land use changes impact the quantity and quality of DOM. Our objective was to test effects of increasing DOM concentrations from Eucalyptus grandis (one of the most cultivated tree species in the world) leachates on the metabolism (respiration, R; gross primary productivity, GPP) and extracellular enzyme activities (EEAs) of freshwater biofilms...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28532390/comparative-genomics-of-eucalyptus-and-corymbia-reveals-low-rates-of-genome-structural-rearrangement
#8
J B Butler, R E Vaillancourt, B M Potts, D J Lee, G J King, A Baten, M Shepherd, J S Freeman
BACKGROUND: Previous studies suggest genome structure is largely conserved between Eucalyptus species. However, it is unknown if this conservation extends to more divergent eucalypt taxa. We performed comparative genomics between the eucalypt genera Eucalyptus and Corymbia. Our results will facilitate transfer of genomic information between these important taxa and provide further insights into the rate of structural change in tree genomes. RESULTS: We constructed three high density linkage maps for two Corymbia species (Corymbia citriodora subsp...
May 22, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28499078/genome-wide-analysis-of-the-lateral-organ-boundaries-domain-lbd-gene-family-in-eucalyptus-grandis-reveals-members-that-differentially-impact-secondary-growth
#9
Qiang Lu, Fenjuan Shao, Colleen Macmillan, Iain W Wilson, Karen van der Merwe, Steven G Hussey, Alexander A Myburg, Xiaomei Dong, Deyou Qiu
Lateral Organ Boundaries Domain (LBD) proteins are plant-specific transcription factors playing crucial roles in growth and development. However, the function of LBD proteins in Eucalyptus grandis remains largely unexplored. In the present study, LBD genes in E. grandis were identified and characterized using bioinformatics approaches. Gene expression patterns in various tissues and the transcriptional responses of EgLBDs to exogenous hormones were determined by qRT-PCR. Functions of the selected EgLBDs were studied by ectopically overexpressing in a hybrid poplar (Populus alba × Populus glandulosa)...
May 12, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28388878/medium-term-water-deficit-elicits-distinct-transcriptome-responses-in-eucalyptus-species-of-contrasting-environmental-origin
#10
Antanas V Spokevicius, Josquin Tibbits, Philippe Rigault, Marc-Alexandre Nolin, Caroline Müller, Andrew Merchant
BACKGROUND: Climatic and edaphic conditions over geological timescales have generated enormous diversity of adaptive traits and high speciation within the genus Eucalyptus (L. Hér.). Eucalypt species occur from high rainfall to semi-arid zones and from the tropics to latitudes as high as 43°S. Despite several morphological and metabolomic characterizations, little is known regarding gene expression differences that underpin differences in tolerance to environmental change. Using species of contrasting taxonomy, morphology and physiology (E...
April 7, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28369560/seasonality-of-nitrogen-partitioning-non-structural-vs-structural-in-the-leaves-and-woody-tissues-of-tropical-eucalypts-experiencing-a-marked-dry-season
#11
Dominique Gérant, Morgane Pluchon, Louis Mareschal, Lydie Stella Koutika, Daniel Epron, Torgny Näsholm
Numerous studies have shown that internal nitrogen (N) translocation in temperate tree species is governed by photoperiod duration and temperature. For tropical tree species, the seasonality of rainfall is known to affect growth and foliage production, suggesting that efficient internal N recycling also occurs throughout the year. We tested this hypothesis by comparing the N budgets and N partitioning (non-structural vs structural N) in the different organs of 7-year-old Eucalyptus urophylla (S.T. Blake) × E...
March 22, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28349984/evidence-for-salicylic-acid-signalling-and-histological-changes-in-the-defence-response-of-eucalyptus-grandis-to-chrysoporthe-austroafricana
#12
Lizahn Zwart, Dave Kenneth Berger, Lucy Novungayo Moleleki, Nicolaas A van der Merwe, Alexander A Myburg, Sanushka Naidoo
Eucalyptus species are cultivated for forestry and are of economic importance. The fungal stem canker pathogen Chrysoporthe austroafricana causes disease of varying severity on E. grandis. The Eucalyptus grandis-Chrysoporthe austroafricana interaction has been established as a model system for studying Eucalyptus antifungal defence. Previous studies revealed that the phytohormone salicylic acid (SA) affects the levels of resistance in highly susceptible (ZG14) and moderately resistant (TAG5) clones. The aims of this study were to examine histochemical changes in response to wounding and inoculation as well as host responses at the protein level...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28338992/identification-of-the-eucalyptus-grandis-chitinase-gene-family-and-expression-characterization-under-different-biotic-stress-challenges
#13
Peri A Tobias, Nanette Christie, Sanushka Naidoo, David I Guest, Carsten Külheim
Eucalyptus grandis (W. Hill ex Maiden) is an Australian Myrtaceae tree grown for timber in many parts of the world and for which the annotated genome sequence is available. Known to be susceptible to a number of pests and diseases, E. grandis is a useful study organism for investigating defense responses in woody plants. Chitinases are widespread in plants and cleave glycosidic bonds of chitin, the major structural component of fungal cell walls and arthropod exoskeletons. They are encoded by an important class of genes known to be up-regulated in plants in response to pathogens...
May 1, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28304126/transcript-profiling-of-a-novel-plant-meristem-the-monocot-cambium
#14
Matthew Zinkgraf, Suzanne Gerttula, Andrew Groover
While monocots lack the ability to produce a vascular cambium or woody growth, some monocot lineages evolved a novel lateral meristem, the monocot cambium, which supports secondary radial growth of stems. In contrast to the vascular cambium found in woody angiosperm and gymnosperm species, the monocot cambium produces secondary vascular bundles, which have an amphivasal organization of tracheids encircling a central strand of phloem. Currently there is no information concerning the molecular genetic basis of the development or evolution of the monocot cambium...
March 17, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28279165/root-morphogenic-pathways-in-eucalyptus-grandis-are-modified-by-the-activity-of-protein-arginine-methyltransferases
#15
Krista L Plett, Anita E Raposo, Stephen Bullivant, Ian C Anderson, Sabine C Piller, Jonathan M Plett
BACKGROUND: Methylation of proteins at arginine residues, catalysed by members of the protein arginine methyltransferase (PRMT) family, is crucial for the regulation of gene transcription and for protein function in eukaryotic organisms. Inhibition of the activity of PRMTs in annual model plants has demonstrated wide-ranging involvement of PRMTs in key plant developmental processes, however, PRMTs have not been characterised or studied in long-lived tree species. RESULTS: Taking advantage of the recently available genome for Eucalyptus grandis, we demonstrate that most of the major plant PRMTs are conserved in E...
March 9, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28237845/fuzzy-logic-applied-to-prospecting-for-areas-for-installation-of-wood-panel-industries
#16
Alexandre Rosa Dos Santos, Ewerthon Mattos Paterlini, Nilton Cesar Fiedler, Carlos Antonio Alvares Soares Ribeiro, Alexandre Simões Lorenzon, Getulio Fonseca Domingues, Gustavo Eduardo Marcatti, Nero Lemos Martins de Castro, Thaisa Ribeiro Teixeira, Gleissy Mary Amaral Dino Alves Dos Santos, Ronie Silva Juvanhol, Elvis Ricardo Figueira Branco, Pedro Henrique Santos Mota, Lilianne Gomes da Silva, Daiani Bernardo Pirovani, Waldir Cintra de Jesus, Ana Carolina de Albuquerque Santos, Helio Garcia Leite, Setsuo Iwakiri
Prospecting for suitable areas for forestry operations, where the objective is a reduction in production and transportation costs, as well as the maximization of profits and available resources, constitutes an optimization problem. However, fuzzy logic is an alternative method for solving this problem. In the context of prospecting for suitable areas for the installation of wood panel industries, we propose applying fuzzy logic analysis for simulating the planting of different species and eucalyptus hybrids in Espírito Santo State, Brazil...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28190676/insights-into-temperature-modulation-of-the-eucalyptus-globulus-and-eucalyptus-grandis-antioxidant-and-lignification-subproteomes
#17
Marília Gabriela de Santana Costa, Paulo Mazzafera, Tiago Santana Balbuena
Eucalyptus grandis and Eucalyptus globulus are among the most widely cultivated trees, differing in lignin composition and plantation areas, as E. grandis is mostly cultivated in tropical regions while E. globulus is preferred in temperate areas. As temperature is a key modulator in plant metabolism, a large-scale proteome analysis was carried out to investigate changes in the antioxidant system and the lignification metabolism in plantlets grown at different temperatures. Our strategy allowed the identification of 3111 stem proteins...
May 2017: Phytochemistry
https://www.readbyqxmd.com/read/28113065/allelopathic-effects-of-volatile-organic-compounds-from-eucalyptus-grandis-rhizosphere-soil-on-eisenia-fetida-assessed-using-avoidance-bioassays-enzyme-activity-and-comet-assays
#18
Tang Zhiqun, Zhang Jian, Yu Junli, Wang Chunzi, Zhang Danju
Allelopathy has been identified as an underlying mechanism of detrimental environmental impacts within commercial plantations. Eucalyptus spp. are known to generate huge amounts of volatile organic compounds (VOCs) that can function as phytotoxins and thus inhibit other plants. In the present study, biochemical markers, including activities of acetylcholinesterase (AChE) and oxidative stress enzymes, such as superoxide dismutase (SOD) and glutathione S-transferase (GST), were assayed to assess changes in Eisenia fetida at the physiological level induced by different doses of VOCs as part of an acute toxicity test over 7 and 14-day exposures...
April 2017: Chemosphere
https://www.readbyqxmd.com/read/28025388/nosema-ceranae-winter-control-study-of-the-effectiveness-of-different-fumagillin-treatments-and-consequences-on-the-strength-of-honey-bee-hymenoptera-apidae-colonies
#19
Y Mendoza, S Diaz-Cetti, G Ramallo, E Santos, M Porrini, C Invernizzi
In Uruguay, colonies of honey bees moving to Eucalyptus grandis plantation in autumn habitually become infected with the microsporidian Nosema ceranae , a parasite that attacks the digestive system of bees. Beekeepers attributed to N. ceranae depopulation of the colonies that often occurs at the end of the blooming period, and many use the antibiotic fumagillin to reduce the level of infection. The aim of this study was to compare the effectiveness of four different fumagillin treatments and determine how this antibiotic affects the strength of the colonies during the winter season...
February 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28008326/localization-and-transcriptional-responses-of-chrysoporthe-austroafricana-in-eucalyptus-grandis-identify-putative-pathogenicity-factors
#20
Ronishree Mangwanda, Lizahn Zwart, Nicolaas A van der Merwe, Lucy Novungayo Moleleki, Dave Kenneth Berger, Alexander A Myburg, Sanushka Naidoo
Chrysoporthe austroafricana is a fungal pathogen that causes the development of stem cankers on susceptible Eucalyptus grandis trees. Clones of E. grandis that are partially resistant and highly susceptible have been identified based on the extent of lesion formation on the stem upon inoculation with C. austroafricana. These interactions have been used as a model pathosystem to enhance our understanding of interactions between pathogenic fungi and woody hosts, which may be different to herbaceous hosts. In previous research, transcriptomics of host responses in these two clones to C...
2016: Frontiers in Microbiology
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