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Rockwood D.L. Naidu C.V. Carter D.R. Rahmani M. Spriggs T.A. Lin C. Alker G.R. Isebrands J.G. Segrest S.A. 《Agroforestry Systems》2004,61(1-3):51-63
Agroforestry Systems - Worldwide, fuelwood demands, soil and groundwater contamination, and agriculture's impact on nature are growing concerns. Fast growing trees in short rotation woody crop... 相似文献
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This study tested the competitive ability of three locally isolated Cyclopia rhizobia and strain PPRICI3, the strain currently recommended for the cultivation of Cyclopia, a tea-producing legume. Under sterile glasshouse conditions, the three locally isolated strains were equally competitive with strain PPRICI3. In field soils, the inoculant strains were largely outcompeted by native rhizobia present in the soil, although nodule occupancy was higher in nodules growing close to the root crown (the original inoculation area). In glasshouse experiments using field soil, the test strains again performed poorly, gaining less than 6% nodule occupancy in the one soil type. The presence of Cyclopia-compatible rhizobia in field soils, together with the poor competitive ability of inoculant strains, resulted in inoculation having no effect on Cyclopia yield, nodule number or nodule mass. The native rhizobial population did not only effectively nodulate uninoculated control plants, they also out-competed introduced strains for nodule occupancy in inoculated plants. Nonetheless, the Cyclopia produced high crop yields, possibly due to an adequate supply of soil N. 相似文献
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Giot L Bader JS Brouwer C Chaudhuri A Kuang B Li Y Hao YL Ooi CE Godwin B Vitols E Vijayadamodar G Pochart P Machineni H Welsh M Kong Y Zerhusen B Malcolm R Varrone Z Collis A Minto M Burgess S McDaniel L Stimpson E Spriggs F Williams J Neurath K Ioime N Agee M Voss E Furtak K Renzulli R Aanensen N Carrolla S Bickelhaupt E Lazovatsky Y DaSilva A Zhong J Stanyon CA Finley RL White KP Braverman M Jarvie T Gold S Leach M Knight J Shimkets RA McKenna MP Chant J Rothberg JM 《Science (New York, N.Y.)》2003,302(5651):1727-1736
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Hemagglutinin variants of reovirus type 3 have altered central nervous system tropism 总被引：22，自引：0，他引：22
Variants of the Dearing strain of reovirus type 3 with antigenically altered hemagglutinin proteins are much less neurovirulent than the parental virus. When injected intracerebrally into mice these variants infected a subset of the brain neurons that were infected by the parental virus. When injected intraperitoneally, the variants did not spread to the brain. These results indicate that minor modifications of the reovirus hemagglutinin dramatically alter the ability of the virus to spread into and injure the central nervous system. 相似文献
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Abrahamsen MS Templeton TJ Enomoto S Abrahante JE Zhu G Lancto CA Deng M Liu C Widmer G Tzipori S Buck GA Xu P Bankier AT Dear PH Konfortov BA Spriggs HF Iyer L Anantharaman V Aravind L Kapur V 《Science (New York, N.Y.)》2004,304(5669):441-445
The apicomplexan Cryptosporidium parvum is an intestinal parasite that affects healthy humans and animals, and causes an unrelenting infection in immunocompromised individuals such as AIDS patients. We report the complete genome sequence of C. parvum, type II isolate. Genome analysis identifies extremely streamlined metabolic pathways and a reliance on the host for nutrients. In contrast to Plasmodium and Toxoplasma, the parasite lacks an apicoplast and its genome, and possesses a degenerate mitochondrion that has lost its genome. Several novel classes of cell-surface and secreted proteins with a potential role in host interactions and pathogenesis were also detected. Elucidation of the core metabolism, including enzymes with high similarities to bacterial and plant counterparts, opens new avenues for drug development. 相似文献
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A 10-yr-old binturong (Arctictis binturong) developed an acute onset of hind limb paralysis. Neurological examination revealed sensorimotor paraplegia. Myelography and computed tomography demonstrated a ventrolateral extradural compression of the spinal cord centered over the L3-L4 intervertebral disc space. Spinal decompression was performed via hemilaminectomy and excision of degenerate nucleus pulposus, confirmed by histopathologic examination. The binturong regained slight motor function by day 8 postoperatively but succumbed to pancreatitis 19 days postoperatively. 相似文献
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