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55 results for “Canker disease”
Effects of stem canker disease on N fixation inputs by Alnus tenuifolia to early-successional floodplains in interior and south-central Alaska. I. Nitrogen fixation rates, leaf chemistry and soil chemistry.
This dataset contains data on nitrogen fixation rates, leaf chemistry, soil temperature and moisture, and soil chemistry on trees selected for studying disease-mediated declines in N-fixation inputs by Alnus tenuifolia to early-successional floodplains in interior and south-central Alaska
Effects of stem canker disease on N fixation inputs by Alnus tenuifolia to early-successional floodplains in interior and south-central Alaska. II. Nodule biomass and incidence of canker for individual genets.
This dataset contains nodule biomass and incidence of canker infection for individual genets of Alnus tenuifolia as part of a project studying disease-mediated declines in N-fixation inputs by Alnus tenuifolia to early-successional floodplains in interior and south-central Alaska
Data from a field plot experiment with the canola pathogen Leptosphaeria maculans including disease severity at the leaf spot and canker stages of the epidemic, and population composition as isolates infectivity pathotypes.
<p><strong>Data set</strong></p> <p>Data are from an experiment simulating how differences in <em>Brassica napus</em> resistance deployment strategies and landscape connectivity influence epidemic severity and pathogen population composition of the fungus <em>Leptosphaeria maculans</em> on field plots inoculated with combinations of stubble in 2016 at CSIRO Canberra, ACT, Australia. Disease severity was assessed on the 60 field plots [Data_severity.csv] and 1490 isolates were sampled and assessed for infectivity [Data_infectivity.csv]. This dataset is described and analyzed in Bousset et al. (2018).</p> <p>Treatments were factorial combination of Resistance, Genetic Connectivity and Spatial Connectivity, replicated in 4 blocks (B1 to B4). Resistance has 3 categories (Rlm4, Rlm6 LepR1) differing by the resistance genes in oilseed rape varieties. Genetic Connectivity has 2 levels (HighGC, LowGC) differing by the pre-adaptation of the stubble populations to the host variety. Spatial Connectivity has two levels (HighSC, LowSC) differing by the stubble load. Control plots had NoStubble.</p> <p><strong>Data files</strong></p> <p>[Data_severity.csv] Disease severity was assessed on the 60 field plots at leaf spot and canker stages of the epidemic. Leaf spots data are counts. Canker data are numbers of stems in 12 categories defined by the cankered area on cross section (0 = no canker to 100 = fully cankered).</p> <p>[Data_infectivity.csv] Two types of isolates (122 from 3 stubble sources with contrasting preadaptation and 1368 from leaves sampled on 50 field plots) were tested for infectivity response (V = infective; A = non-infective) on the three host varieties (Rlm4, Rlm6 LepR1), at the seedling stage in greenhouse.</p> <p><strong>Associated publication</strong></p> <p>Bousset L, Sprague S, Thrall PH, Barrett LG (2018). Spatio-temporal connectivity and host resistance influence evolutionary and epidemiological dynamics of the canola pathogen <em>Leptosphaeria maculans. Evolutionary Applications</em> [ DOI: 10.1111/eva.12630 ].</p> <p><strong>Funding information</strong></p> <p>This work benefited from the financial support of INRA – the French National Institute for Agronomical Research, a CSIRO Sir Frederick McMaster fellowship to L. Bousset (Impact of inoculum carry-over on landscape dynamics of the blackleg canola pathogen) and the Grains Research & Development Corporation (GRDC Grant CSP00192)</p>
Data from: A novel molecular toolkit for rapid detection of the pathogen and primary vector of thousand cankers disease
Open the record for dataset details and reuse information.
FIGURE 8 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 8. Pattern of overlapping Cytospora species among Elaeagnus angustifolia, Hippophae rhamnoides and Salix psammophila.
FIGURE 2 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 2. Phylogram of ITS regions based on MP, ML and Bayesian analysis. Values above the branches indicate maximum parsimony bootstrap (MP BP ≥ 50 %) and maximum likelihood bootstrap (ML BP ≥ 50 %). Values below branches represent posterior probabilities (BI PP ≥ 0.90) from Bayesian inference. Scale bar = 20 nucleotide substitutions. The new sequences resulting from the current study are in blue. Ex-type strains are in bold. The strains designated as epitype are shown in asterisk.
FIGURE 5 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 5. Morphology of Cytospora elaeagni from Elaeagnus angustifolia (BJFC-S642). a, d: Habit of conidiomata on a twig. b, c: Longitudinal sections through conidiomata. e, f: Transverse sections through conidiomata. g: Conidiophores. h: Conidia. i: Colonies on PDA at 3 days (left) and 30 days (right). Scale bars: a=1 mm; b–f=0.5 mm; g=20 μm; h=5 μm.
FIGURE 7 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 7. Morphology of Cytospora nivea from Salix psammophila (BJFU-S979). a, d: Habit of conidiomata on twig. b, c: Longitudinal sections through conidiomata. e, f: Transverse sections through conidiomata. g: Conidiophores. h: Conidia. i: Colonies on PDA at 3 days (left) and 30 days (right). j: Habit of ascomata on twig. k: Longitudinal sections through ascomata. l: Disc of ascomata on twig. m: Transverse sections through ascomata. n: Asci. o: ascospores. p: Colonies on PDA at 3 days (left) and 30 days (right). Scale bars: a, j=1
FIGURE 1 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 1. Phylogram of combined genes of ITS, nrLSU, RPB2, and ACT genes based on MP, ML and Bayesian analysis. Values above the branches indicate maximum parsimony bootstrap (MP BP ≥ 50 %) and maximum likelihood bootstrap (ML BP ≥ 50 %). Thickened branches represent posterior probabilities (BI PP ≥ 0.90) from Bayesian inference. Scale bar = 50 nucleotide substitutions. Ex-type strains are in bold. The strains designated as epitype are shown in asterisk.
FIGURE 6 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 6. Morphology of Cytospora hippophaes from Hippophae rhamnoides (BJFC-S779). a, d: Habit of conidiomata on twig. b, c: Longitudinal sections through conidiomata. e, f: Transverse sections through conidiomata. g: Conidiophores. h: Conidia. i: Colonies on PDA at 3 days (left) and 30 days (right). j: Habit of ascomata on twig. k: Longitudinal sections through ascomata. l: Disc of ascomata on twig. m: Transverse sections through ascomata. n: Asci. o: ascospores. p: Colonies on PDA at 3 days (left) and 30 days (right). Scale bars: a, j=1 mm; b–f, k–m=0.5 mm; g=20 μm; h=5 μm; n–o=10 μm.
FIGURE 4 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 4. Morphology of Cytospora populina from Salix psammophila (BJFC-S978). a, d: Habit of ascomata on a twig. b, c: Longitudinal sections through ascomata. e, f: Transverse sections through ascomata. g: Ascus. h: ascospores. i: Colonies on PDA at 3 days (left) and 30 days (right). Scale bars: a=1 mm; b–f=0.5 mm; g–h=20 μm.
FIGURE 3 in Cytospora species associated with canker disease of three anti-desertification plants in northwestern China
FIGURE 3. Morphology of Cytospora gigaspora from Salix psammophila (BJFC-S975, holotype). a, d: Habit of conidiomata on a twig. b, c: Longitudinal sections through conidiomata. e, f: Transverse sections through conidiomata. g: Conidiophores. h: Conidia. i: Colonies on PDA at 3 days (left) and 30 days (right). Scale bars: a = 1 mm; b–f = 0.5 mm; g = 20 μm; h = 5 μm.
FIGURE 2 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 2. Morphology of Nectria ulmicola from Ulmus davidiana var. japonica (BJFC-S1372, holotype). A–C: Sporodochia on natural substrata. D: Median section of astipitate sporodochium. E–F: Conidia. G: Conidiophores. H: Immature conidiophores. Scale bars: A–D = 200 μm; E–H = 10 μm.
FIGURE 6 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 6. Morphology of Nectria pseudotrichia from Ulmus pumila (BJFC-S1392). A: Host branch. B–D: Synnemata on natural substrata. E: Median section of synnema. F–H: Conidiophores and conidia. I: Conidia. Scale bars: C = 1 mm; D–E = 500 μm; F–I = 20 μm.
FIGURE 4 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 4. Sexual morph of Nectria dematiosa from Malus baccata (BJFC-S440). A: Host branch. B–D: Perithecia on natural substrata. E–F: Median section of perithecium. G–I: Asci. J–L: Ascospores. Scale bars: B–C = 1 mm; D–E = 500 μm; F–L = 20 μm.
FIGURE 1 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 1. Phylogram of the combined act, LSU, ITS, rpb2, tef1, and tub2 gene sequences based on the MP, ML, and BI analyses. Values at the nodes indicate the Maximum Parsimony bootstrap proportion (left, MPBP ≥ 50%) and the Maximum Likelihood bootstrap proportion (right, MLBP ≥ 50%). The branches with significant BIPP values (≥ 0.90) in the BI analysis are thickened. Scale bar = 200 nucleotide substitutions. *Ex-type/Ex-epitype isolate. The new Nectria species resulting from the current study is highlighted in bold.
FIGURE 3 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 3. Morphology of Nectria balansae from Aphananthe aspera (BJFC-S1389). A: Host branch. B–D: Perithecia on natural substrata. E–F: Median section of perithecium. G, J, K: Ascospores. H–I: Asci. Scale bars: B–E = 500 μm; F, H, I = 50 μm; G, J, K = 20 μm.
FIGURE 5 in Molecular phylogeny of Nectria species associated with dieback and canker diseases in China, with a new species described
FIGURE 5. Asexual morph of Nectria dematiosa from Rosa xanthina (BJFC-S441). A: Host branch. B–C: Astipitate sporodochium on natural substrata. D–E: Median section of astipitate sporodochium. F–G: Conidia. H–J: Conidiophores and conidia. Scale bars: B–C = 1 mm; D–E = 500 μm; F–J = 20 μm.
Figure 2 from: Zhu H, Pan M, Bezerra JDP, Tian C, Fan X (2020) Discovery of Cytospora species associated with canker disease of tree hosts from Mount Dongling of China. MycoKeys 62: 97-121. https://doi.org/10.3897/mycokeys.62.47854
Figure 2 Phylogram of Cytospora, based on combined ITS, LSU, act, rpb2, tef1-α and tub2 genes. The MP and ML bootstrap support values above 50% are shown at the first and second positions, respectively. Thickened branches represent posterior probabilities above 0.95 from the BI. Ex-type strains are in bold. Strains from the current study are in blue.
Figure 5 from: Zhu H, Pan M, Bezerra JDP, Tian C, Fan X (2020) Discovery of Cytospora species associated with canker disease of tree hosts from Mount Dongling of China. MycoKeys 62: 97-121. https://doi.org/10.3897/mycokeys.62.47854
Figure 5 Cytospora leucostoma (Asexual morph) from Juglans mandshurica (CF 2019809). A, B habit of conidiomata on twig C transverse section of conidioma D longitudinal section through conidioma E conidiophores and conidiogenous cells F conidia G colonies on PDA at 3 days (left) and 30 days (right). Scale bars: 1 mm (A); 500 μm (B–D); 10 μm (E, F).
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