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Price DC Chan CX Yoon HS Yang EC Qiu H Weber AP Schwacke R Gross J Blouin NA Lane C Reyes-Prieto A Durnford DG Neilson JA Lang BF Burger G Steiner JM Löffelhardt W Meuser JE Posewitz MC Ball S Arias MC Henrissat B Coutinho PM Rensing SA Symeonidi A Doddapaneni H Green BR Rajah VD Boore J Bhattacharya D 《Science (New York, N.Y.)》2012,335(6070):843-847
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Pathogenicity of 21 newly described Phytophthora species against seven Western Australian native plant species 
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下载免费PDF全文 The pathogenicity of some Phytophthora species recently described from Western Australia, together with P. cinnamomi as a control, was tested against seven Western Australian native plant species in the glasshouse. Host species were Banksia grandis, B. littoralis, B. occidentalis, Casuarina obesa, Corymbia calophylla, Eucalyptus marginata and Lambertia inermis. Twenty‐two Phytophthora species were grown on a vermiculite, millet seed and V8 substrate and used as soil inoculum when the plant hosts were approximately 3 months old. Pathogenicity was assessed after 6 weeks and plants were scored for death, root damage, and percentage reduction of shoot growth compared with control plants. The pathogenicity of P. cinnamomi was confirmed. Phytophthora niederhauserii was shown to be similar to P. cinnamomi in pathogenicity and of concern ecologically. Other species that killed one or more hosts were P. boodjera, P. constricta, P. elongata, P. moyootj and P. rosacearum, while P. condilina, P. gibbosa, P. gregata, P. litoralis and P. ‘personii’ caused significant reduction to shoot and/or root growth, but did not kill plants. Host species susceptible to the highest number of Phytophthora species were B. grandis, B. littoralis, B. occidentalis and E. marginata. No Phytophthora species tested killed C. calophylla. 相似文献
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Treena I. Burgess Adrián López-Villamor Trudy Paap Briony Williams Rajah Belhaj Michael Crone William Dunstan Kay Howard Giles E. St. J. Hardy 《Plant pathology》2021,70(3):604-614
The genus Phytophthora contains species that are major pathogens worldwide, affecting a multitude of plant species across agriculture, horticulture, forestry, and natural ecosystems. Here, we concentrate on those species that are dispersed through soil and water, attacking the roots of the plants, causing them to rot and die. The intention of this study was to compare the soil baiting protocol developed by the Centre for Phytophthora Science and Management (CPSM) with two other baiting methods used in Australia. The aim was to demonstrate the effectiveness of each protocol for soil baiting Phytophthora species in different substrates. Three experiments were conducted: the first to test the sensitivity of each method to detect Phytophthora cinnamomi, the second to test the effect of substrate type (sand or loam), and the third to test the detection of species (P. cinnamomi, P. multivora, or P. pseudocryptogea). The specificity of different plant species baits was compared within and between the methods. Substrate type influenced isolation in all methods; however, the CPSM method was superior regardless of substrate, albeit slower than one of the other methods for one substrate. Comparing bait species between the three methods, Quercus ilex was the most attractive bait for P. cinnamomi, particularly in the CPSM method. The choice of protocol affected the isolation associated with each bait type. Overall, the multiple bait system used by CPSM was shown to provide the most sensitive and reliable detection of Phytophthora species from soil samples. 相似文献
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Nabila Belhaj Frédéric Desor Céline Gleizes Frédéric M. Denis Elmira Arab-Tehrany Rachid Soulimani Michel Linder 《Marine drugs》2013,11(11):4294-4317
A phospholipopeptidic complex obtained by the enzymatic hydrolysis of salmon heads in green conditions; exert anxiolytic-like effects in a time and dose-dependent manner, with no affection of locomotor activity. This study focused on the physico-chemical properties of the lipidic and peptidic fractions from this natural product. The characterization of mineral composition, amino acid and fatty acids was carried out. Stability of nanoemulsions allowed us to realize a behavioral study conducted with four different tests on 80 mice. This work highlighted the dose dependent effects of the natural complex and its various fractions over a period of 14 days compared to a conventional anxiolytic. The intracellular redox status of neural cells was evaluated in order to determine the free radicals scavenging potential of these products in the central nervous system (CNS), after mice sacrifice. The complex peptidic fraction showed a strong scavenging property and similar results were found for the complex as well as its lipidic fraction. For the first time, the results of this study showed the anxiolytic-like and neuroprotective properties of a phospholipopeptidic complex extracted from salmon head. The applications on anxiety disorders might be relevant, depending on the doses, the fraction used and the chronicity of the supplementation. 相似文献
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B. Mille M. Belhaj Fraj H. Monod C. de Vallavieille-Pope 《European journal of plant pathology / European Foundation for Plant Pathology》2006,114(2):163-173
Seven four-way bread wheat mixtures were compared to their components (individual cultivars and two-way mixtures) for septoria
tritici blotch severity, grain protein content, and grain yield. Four-way mixtures and two-way mixtures performed better than
the average of individual pure line components. Disease severity and protein content were most influenced by mixtures, with
mixture efficiencies being greater in the four-way than in the two-way mixtures. Performances of four-way mixtures in terms
of diseased leaf area reduction, grain yield, 1000-grain weight, and grain protein content were better predicted by performances
of two-way mixtures than by those of pure lines. Our results suggest that two-way mixtures should be screened to remove unfavourable
cultivar pairs and those binary mixtures that show complementarity should be selected in order to construct four-way mixtures. 相似文献
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We investigated how much forest structure and floristics independently contributed to the composition of avian assemblages at multiple scales and for individual foraging guilds in tropical deciduous forests of Central Highlands, India. We derived dissimilarity matrices between all pairs of the 36 sampling sites with respect to forest structure, floristics, and bird species composition and ran Mantel's randomization tests to detect significant associations among the matrices after partialling out the effect of geographic distance between sites. Bird species composition was found to be significantly related to forest structure across habitats, and floristics within the moist-deciduous forests. This finding is consistent with earlier observations that birds respond, in their species composition, to vegetation structure across habitats and to vegetation composition within a habitat. As predicted, the composition of insectivorous birds was influenced by forest structure, but the phytophagous guild did not show any relation to vegetation composition in contrast to patterns observed elsewhere. We explain this anomaly as a result of availability of a wide choice of food plants for phytophagous birds in central Indian tropical forests and weak species–environment relationships on account of their nomadism. Extraction of non-timber forest products remains a key economic activity in central India and our results imply that it can potentially influence the composition of forest bird communities through alteration of forest structure and floristics. 相似文献
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A total of 370 dogs from the District Veterinary Office in Seremban, Malaysia, was examined for dirofilariasis. An overall incidence of infection of 32.4% was observed, but pure bred dogs showed a slightly higher incidence of infection (39.2%) and a higher parasitaemia, whereas mixed bred dogs were less frequently infected (27.4%) and usually had a lower parasitaemia. In addition, short-haired pedigree dogs such as boxers, Dobermanns, dachshunds and bulldogs were generally more frequently infected and showed a higher parasitaemia than longer-haired pedigree dogs, such as Alsatians, spaniels and terriers. There was no significant difference in distribution of infection among dogs of different sexes and age groups. 相似文献
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M. Belhaj Fraj H. Falentin-Guyomarc'h H. Monod C. DE Vallavieille-Pope W. E. Weber 《Plant Breeding》2003,122(5):385-391
Two polymorphic microsatellite markers were selected to identify 24 bread wheat cultivars commonly grown in France and to estimate the proportions of cultivar and hybrid grains in the harvests of four 4‐cultivar mixtures (CM 1‐4) planted in equal proportions in farmers’ fields. This technology was used not only to determine whether a mixture comprises the declared cultivars, but also whether there is any contamination with other cultivars, to identify the contaminants and to estimate their proportions. At harvest, the cultivar proportions ranged from 15 to 37%. Only in the mixture CM2 (‘Malacca’, ‘Somme’, ‘Renan’ and ‘Soissons’), did the cultivars contribute equally to the harvest. The other cultivar mixtures CM1 (‘Malacca’, ‘Somme’, ‘Renan’ and ‘Camp Remy’), CM3 (‘Malacca’, ‘Texel’, ‘Apache’ and ‘Aligre’) and CM4 (‘Malacca’, ‘Somme’, ‘Apache’ and ‘Virtuose’) showed significantly unequal cultivar proportions with ‘Somme’ dominating ‘Renan’ and ‘Camp Remy’ in CM1, and ‘Apache’ dominating ‘Malacca’ and ‘Aligre’ in CM3 and ‘Malacca’ in CM4. Similar cultivar proportions were measured with gliadin and glutenin markers in the mixtures CM3 and CM4, confirming the results with microsatellites. No contamination was found. Hybrids accounted for between 1.3 and 6.3% of the grains produced in the four cultivar mixtures. 相似文献
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Rajah Rasiah 《Asia Pacific viewpoint》1996,37(1):21-38
The early growth phase of Malaysia’s electronics industry coincided in the 1970s with high unemployment and accelerated ruralurban migration and a willingness to make considerable concessions to foreign transnationals seeking suitable cheap and passive labour sites. The result was a very rigid exploitation of the labour force. Interviews with a variety of contemporary electronics firms show how this changed in the I 980s and I 990s. Demand for labour increased and unemployment declined, automation removed much of the labour intensity and raised the need for skill and cooperation and commitment of those hired to work in an increasingly sophisticated sector. Wages rose and management practices changed, together with the introduction of flexible production techniques, preventative maintenance and quality control, each of which required considerable employee participation. Despite these changes, both firms and government have resisted attempts nationwide unionisation of the industry. 相似文献
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