The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
J. Paul Knox - One of the best experts on this subject based on the ideXlab platform.
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Arabinogalactan proteins occur in the free-living Cyanobacterium Genus Nostoc and in plant-Nostoc symbioses.
Molecular Plant-microbe Interactions, 2012Co-Authors: Owen Jackson, Oliver Taylor, David G. Adams, J. Paul KnoxAbstract:Arabinogalactan proteins (AGP) are a diverse family of proteoglycans associated with the cell surfaces of plants. AGP have been implicated in a wide variety of plant cell processes, including signaling in symbioses. This study investigates the existence of putative AGP in free-living cyanobacterial cultures of the nitrogen-fixing, filamentous cyanobacteria Nostoc punctiforme and Nostoc sp. strain LBG1 and at the symbiotic interface in the symbioses between Nostoc spp. and two host plants, the angiosperm Gunnera manicata (in which the Cyanobacterium is intracellular) and the liverwort Blasia pusilla (in which the Cyanobacterium is extracellular). Enzyme-linked immunosorbent assay, immunoblotting, and immunofluorescence analyses demonstrated that three AGP glycan epitopes (recognized by monoclonal antibodies LM14, MAC207, and LM2) are present in free-living Nostoc cyanobacterial species. The same three AGP glycan epitopes are present at the Gunnera–Nostoc symbiotic interface and the LM2 epitope is detected during the establishment of the Blasia–Nostoc symbiosis. Bioinformatic analysis of the N. punctiforme genome identified five putative AGP core proteins that are representative of AGP classes found in plants. These results suggest a possible involvement of AGP in cyanobacterial–plant symbioses and are also suggestive of a cyanobacterial origin of AGP.
Owen Jackson - One of the best experts on this subject based on the ideXlab platform.
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Arabinogalactan proteins occur in the free-living Cyanobacterium Genus Nostoc and in plant-Nostoc symbioses.
Molecular Plant-microbe Interactions, 2012Co-Authors: Owen Jackson, Oliver Taylor, David G. Adams, J. Paul KnoxAbstract:Arabinogalactan proteins (AGP) are a diverse family of proteoglycans associated with the cell surfaces of plants. AGP have been implicated in a wide variety of plant cell processes, including signaling in symbioses. This study investigates the existence of putative AGP in free-living cyanobacterial cultures of the nitrogen-fixing, filamentous cyanobacteria Nostoc punctiforme and Nostoc sp. strain LBG1 and at the symbiotic interface in the symbioses between Nostoc spp. and two host plants, the angiosperm Gunnera manicata (in which the Cyanobacterium is intracellular) and the liverwort Blasia pusilla (in which the Cyanobacterium is extracellular). Enzyme-linked immunosorbent assay, immunoblotting, and immunofluorescence analyses demonstrated that three AGP glycan epitopes (recognized by monoclonal antibodies LM14, MAC207, and LM2) are present in free-living Nostoc cyanobacterial species. The same three AGP glycan epitopes are present at the Gunnera–Nostoc symbiotic interface and the LM2 epitope is detected during the establishment of the Blasia–Nostoc symbiosis. Bioinformatic analysis of the N. punctiforme genome identified five putative AGP core proteins that are representative of AGP classes found in plants. These results suggest a possible involvement of AGP in cyanobacterial–plant symbioses and are also suggestive of a cyanobacterial origin of AGP.
Oliver Taylor - One of the best experts on this subject based on the ideXlab platform.
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Arabinogalactan proteins occur in the free-living Cyanobacterium Genus Nostoc and in plant-Nostoc symbioses.
Molecular Plant-microbe Interactions, 2012Co-Authors: Owen Jackson, Oliver Taylor, David G. Adams, J. Paul KnoxAbstract:Arabinogalactan proteins (AGP) are a diverse family of proteoglycans associated with the cell surfaces of plants. AGP have been implicated in a wide variety of plant cell processes, including signaling in symbioses. This study investigates the existence of putative AGP in free-living cyanobacterial cultures of the nitrogen-fixing, filamentous cyanobacteria Nostoc punctiforme and Nostoc sp. strain LBG1 and at the symbiotic interface in the symbioses between Nostoc spp. and two host plants, the angiosperm Gunnera manicata (in which the Cyanobacterium is intracellular) and the liverwort Blasia pusilla (in which the Cyanobacterium is extracellular). Enzyme-linked immunosorbent assay, immunoblotting, and immunofluorescence analyses demonstrated that three AGP glycan epitopes (recognized by monoclonal antibodies LM14, MAC207, and LM2) are present in free-living Nostoc cyanobacterial species. The same three AGP glycan epitopes are present at the Gunnera–Nostoc symbiotic interface and the LM2 epitope is detected during the establishment of the Blasia–Nostoc symbiosis. Bioinformatic analysis of the N. punctiforme genome identified five putative AGP core proteins that are representative of AGP classes found in plants. These results suggest a possible involvement of AGP in cyanobacterial–plant symbioses and are also suggestive of a cyanobacterial origin of AGP.
David G. Adams - One of the best experts on this subject based on the ideXlab platform.
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Arabinogalactan proteins occur in the free-living Cyanobacterium Genus Nostoc and in plant-Nostoc symbioses.
Molecular Plant-microbe Interactions, 2012Co-Authors: Owen Jackson, Oliver Taylor, David G. Adams, J. Paul KnoxAbstract:Arabinogalactan proteins (AGP) are a diverse family of proteoglycans associated with the cell surfaces of plants. AGP have been implicated in a wide variety of plant cell processes, including signaling in symbioses. This study investigates the existence of putative AGP in free-living cyanobacterial cultures of the nitrogen-fixing, filamentous cyanobacteria Nostoc punctiforme and Nostoc sp. strain LBG1 and at the symbiotic interface in the symbioses between Nostoc spp. and two host plants, the angiosperm Gunnera manicata (in which the Cyanobacterium is intracellular) and the liverwort Blasia pusilla (in which the Cyanobacterium is extracellular). Enzyme-linked immunosorbent assay, immunoblotting, and immunofluorescence analyses demonstrated that three AGP glycan epitopes (recognized by monoclonal antibodies LM14, MAC207, and LM2) are present in free-living Nostoc cyanobacterial species. The same three AGP glycan epitopes are present at the Gunnera–Nostoc symbiotic interface and the LM2 epitope is detected during the establishment of the Blasia–Nostoc symbiosis. Bioinformatic analysis of the N. punctiforme genome identified five putative AGP core proteins that are representative of AGP classes found in plants. These results suggest a possible involvement of AGP in cyanobacterial–plant symbioses and are also suggestive of a cyanobacterial origin of AGP.
Yougan Wang - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal distribution of tropical phytoplankton species and biomass in the gulf of carpentaria australia
Marine Ecology Progress Series, 1995Co-Authors: Michele A Burford, Peter C Rothlisberg, Yougan WangAbstract:Free to read on publisher website Abstract The biomass and species composition of tropical phytoplankton in Albatross Bay, Gulf of Carpentaria, northern Australia, were examined monthly for 6 yr (1986 to 1992). Chlorophyll a (chl a) concentrations were highest (2 to 5.7 mu g l(-1)) in the wet season at inshore sites, usually coinciding with low salinities (30 to 33 ppt) and high temperatures (29 to 32 degrees C). At the offshore sites chi a concentrations were lower (0.2 to 2 mu g l(-1)) and did not vary seasonally. Nitrate and phosphate concentrations were generally low (0 to 3.68 mu M and 0.09 to 3 mu M for nitrate and phosphate respectively), whereas silicate was present in concentrations in the range 0.19 to 13 mu M. The phytoplankton community was dominated by diatoms, particularly at the inshore sites, as determined by a combination of microscopic and high-performance liquid chromatography (HPLC) pigment analyses. At the offshore sites the proportion of green flagellates increased. The Cyanobacterium Genus Trichodesmium and the diatom genera Chaetoceros, Rhizosolenia, Bacteriastrum and Thalassionema dominated the phytoplankton caught in 37 mu m mesh nets; however, in contrast to many other coastal areas studied worldwide there was no distinct species succession of the diatoms and only Trichodesmium showed seasonal changes in abundance. This reflects a stable phytoplankton community in waters without pulses of physical and chemical disturbances. These results are discussed in the context of the commercial prawn fishery in the Gulf of Carpentaria and the possible effect of phytoplankton on prawn larval growth and survival.
