Resistance Evaluation of Some Chinese Leading Rice Maintainer, Restorer lines and Their Hybrids to Magnaporthe grisea   总被引：1，自引：0，他引：1  

ZHUXu-dong SHENYing HenriADREIT JulienFROUIN DidierHARREAU 《水稻科学》2004,11(3):101-105

Six isolates of Magnaporthe grisea were selected to inoculate on 10 Chinese leading maintainer lines (B-lines), 14 restorer lines (R-lines) and their F1 hybrid plants. In the tested rice materials, R-lines were proved to be more resistant to blast than B-lines. The resistance frequency of about 25% F1 hybrid plants was less than their parents. In addition, 26 isolates of M. grisea collected from different rice growing areas of China were inoculated on 13 new improved hybrid rice combinations. The resistance frequencies of 5 improved hybrids were better than those of the controls and leading varieties in rice production of China.  相似文献   

Spatial activity and expression of plasma membrane H+-ATPase in stem xylem of walnut during dormancy and growth resumption   总被引：1，自引：0，他引：1  

Alves G  Decourteix M  Fleurat-Lessard P  Sakr S  Bonhomme M  Améglio T  Lacointe A  Julien JL  Petel G  Guilliot A 《Tree physiology》2007,27(10):1471-1480

Plasma membrane H+-ATPase (PM H+-ATPase) plays a key role in nutrient transport, stress responses and growth. To evaluate proton motive force differences between apical and basal parts of acrotonic 1-year-old shoots of walnut (Juglans regia L. cv 'Franquette') trees, spatial and seasonal changes in PM H+-ATPase were studied in mature xylem tissues. During both the dormancy and growth resumption periods, and in both the apical and basal parts of the stem, PM H+-ATPase activity showed positive correlations with the amount of immunodetectable protein. In spring, at the time of growth resumption, higher activities and immunoreactivities of PM H+-ATPase were found in the apical part of the stem than in the basal part of the stem. In spring, the decrease in xylem sugar concentration reflected the high sugar uptake rate. Our data suggest that PM H+-ATPase plays a major role in the uptake of carbohydrates from xylem vessels during growth resumption. These results are discussed in the context of the acrotonic tendency of walnut shoots.  相似文献   

Spin crossover in ferropericlase at high pressure: a seismologically transparent transition?     

Antonangeli D  Siebert J  Aracne CM  Farber DL  Bosak A  Hoesch M  Krisch M  Ryerson FJ  Fiquet G  Badro J 《Science (New York, N.Y.)》2011,331(6013):64-67

Seismic discontinuities in Earth typically arise from structural, chemical, or temperature variations with increasing depth. The pressure-induced iron spin state transition in the lower mantle may influence seismic wave velocities by changing the elasticity of iron-bearing minerals, but no seismological evidence of an anomaly exists. Inelastic x-ray scattering measurements on (Mg(0.83)Fe(0.17))O-ferropericlase at pressures across the spin transition show effects limited to the only shear moduli of the elastic tensor. This explains the absence of deviation in the aggregate seismic velocities and, thus, the lack of a one-dimensional seismic signature of the spin crossover. The spin state transition does, however, influence shear anisotropy of ferropericlase and should contribute to the seismic shear wave anisotropy of the lower mantle.  相似文献   

Retinoic acid controls the bilateral symmetry of somite formation in the mouse embryo     

Vermot J  Gallego Llamas J  Fraulob V  Niederreither K  Chambon P  Dollé P 《Science (New York, N.Y.)》2005,308(5721):563-566

A striking characteristic of vertebrate embryos is their bilaterally symmetric body plan, which is particularly obvious at the level of the somites and their derivatives such as the vertebral column. Segmentation of the presomitic mesoderm must therefore be tightly coordinated along the left and right embryonic sides. We show that mutant mice defective for retinoic acid synthesis exhibit delayed somite formation on the right side. Asymmetric somite formation correlates with a left-right desynchronization of the segmentation clock oscillations. These data implicate retinoic acid as an endogenous signal that maintains the bilateral synchrony of mesoderm segmentation, and therefore controls bilateral symmetry, in vertebrate embryos.  相似文献   

Retroperitoneoscopy in the horse: Anatomical study of the retroperitoneal perirenal space and description of a surgical approach     

Raymond Pujol  Claire De Fourmestraux  Antoine Symoens  Julien Branchereau  Caroline Tessier 《Equine veterinary journal》2021,53(2):364-372

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Minimally invasive spine surgery in dogs: Evaluation of the safety and feasibility of a thoracolumbar approach to the spinal cord     

Julien Guevar DVM  MVM  DECVN  Natalia Zidan DVM  Alexane Durand DVM  MVM  DECVDI  DACVR  Natasha J. Olby PhD  DACVIM 《Veterinary surgery : VS》2020,49(Z1):O76-O85

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Outcome and treatments of dogs with aortic thrombosis: 100 cases (1997-2014)     

Mackenzie Ruehl  Alex M. Lynch  Therese E. O'Toole  Bari Morris  John Rush  C. Guillermo Couto  Samantha Hmelo  Stacey Sonnenshein  Amy Butler  Julien Guillaumin 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2020,34(5):1759-1767

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Caution needed with the EU forest plantation strategy for offsetting carbon emissions     

Fady  Bruno  Davi  Hendrik  Martin-StPaul  Nicolas  Ruffault  Julien 《New Forests》2021,52(5):733-735

As part of the 2015 Paris climate agreement and under its Green Deal, the EU proposes to strongly rely on forests for offsetting its carbon footprint. However, planting trees should be avoided in wildfire prone and drought prone habitats, which are expanding significantly as climate warms across Europe. In favorable habitats, tree planting remains a controversial solution and the risk of using inappropriate material is high in the absence of long-term planning, unfortunately typical of the forest seed and nursery sector. The EU forest tree planting strategy should pay close attention to local land-use issues, to within- and among-species genetic diversity and should adopt relevant, pluri-annual funding schemes and planting contracts rather than letting market opportunities govern the future of forest tree plantations.

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Experimental bases for a chemical control of Coquillettidia mosquito populations     

Julien Sérandour  Patrick Ravanel  Michel Tissut  Guy Lempérière  Muriel Raveton 《Pesticide biochemistry and physiology》2011,101(2):65-70

Coquillettidia mosquitoes are not efficiently controlled by the conventional chemical practices which are known to be satisfactory against the larvae of other mosquito species. A research project was undertaken to conceive a new management strategy using plants as pesticide vectors to reach the Coquillettidia aquatic larvae. Therefore, larval mortality was measured in the presence of plants treated with phloem-translocated pesticides. The herbicide glyphosate at sub-lethal concentrations induced root epidermal cell lyses in maize plantlets cultivated in aqueous media, which clearly decreased larval fixation. Therefore, such herbicide strategy might operate through disturbing the larval physiological activities depending on fixation. The dimethoate insecticide did not affect root viability but at low concentrations seemed to disturb the plant–insect interactions. Larvae showed a lower attraction for roots and a considerable decrease in the root fixation rate. These larval behavior modifications were sufficient to induce mortality, probably due to a lack of fixation on plant roots. The effectiveness of plant foliar treatment with glyphosate or dimethoate under laboratory conditions suggested that it might be the basis for an efficient control strategy for Coquillettidia larvae and mosquitoes having the same living conditions in ponds and for which fixation on macrophyte roots is an absolute requirement (e.g.Mansonia, Mimomyia).  相似文献   

Control of common bunt of wheat under field conditions with the biofumigant fungus <Emphasis Type="Italic">Muscodor albus</Emphasis>     

Blair J. Goates  Julien Mercier 《European journal of plant pathology / European Foundation for Plant Pathology》2011,131(3):403-407

Field experiments were conducted to evaluate the biological control potential of the fungus Muscodor albus, when applied as a seed treatment or an in furrow soil treatment, for control of common bunt (CB) of wheat caused by Tilletia caries. For seed treatments, dry rye grain culture of M. albus was ground into powder and applied, at a rate of 125 mg/g seed, to wheat seed infested with T. caries teliospores. The culture was also cracked into particles and applied in furrow at the rate of 4 g/m of row, along with teliospore infested seed during planting. Treatments were evaluated during two growing seasons and two planting dates beginning in early spring when soil temperatures were optimal for disease development (5–10°C), and then approximately 3 weeks later. In the first year, treatments in the first seeding date reduced CB from 44% diseased spikes in untreated controls to 12% and 9% in seed and in furrow treatments respectively, and from 6% in controls to 0% in both treatments in the second seeding date. In the second year, CB was reduced from 8% in controls to 0.5% and 0.25% for seed and in furrow treatments respectively in the first seeding date, and from 0.75% in controls to 0% in both the treatments in the second seeding date. M. albus may have potential for CB control in organic wheat production where options for managing the disease are very limited.  相似文献