{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360567184691908224.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1093/pcp/pcs093"}},{"identifier":{"@type":"URI","@value":"http://academic.oup.com/pcp/article-pdf/53/8/1492/17116674/pcs093.pdf"}},{"identifier":{"@type":"PMID","@value":"22739509"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Single-Cell Confocal Spectrometry of a Filamentous Cyanobacterium Nostoc at Room and Cryogenic Temperature. Diversity and Differentiation of Pigment Systems in 311 Cells"}],"description":[{"notation":[{"@value":"The fluorescence spectrum at 298 and 40 K and the absorption spectrum at 298 K of each cell of the filamentous cyanobacterium Nostoc sp. was measured by single-cell confocal laser spectroscopy to study the differentiation of cell pigments. The fluorescence spectra of vegetative (veg) and heterocyst (het) cells of Nostoc formed separate groups with low and high PSII to PSI ratios, respectively. The fluorescence spectra of het cells at 40 K still contained typical PSII bands. The PSII/PSI ratio estimated for the veg cells varied between 0.4 and 1.2, while that of het cells varied between 0 and 0.22 even in the same culture. The PSII/PSI ratios of veg cells resembled each other more closely in the same filament. 'pro-het' cells, which started to differentiate into het cells, were identified from the small but specific difference in the PSII/PSI ratio. The allophycocyanin (APC)/PSII ratio was almost constant in both veg and het cells, indicating their tight couplings. Phycocyanin (PC) showed higher fluorescence in most het cells, suggesting the uncoupling from PSII. Veg cells seem to vary their PSI contents to give different PSII/PSI ratios even in the same culture, and to suppress the synthesis of PSII, APC and PC to differentiate into het cells. APC and PC are gradually liberated from membranes in het cells with the uncoupling from PSII. Single-cell spectrometry will be useful to study the differentiation of intrinsic pigments of cells and chloroplasts, and to select microbes from natural environments."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380567184691908100","@type":"Researcher","foaf:name":[{"@value":"Kana Sugiura"}]},{"@id":"https://cir.nii.ac.jp/crid/1380567184691907968","@type":"Researcher","foaf:name":[{"@value":"Shigeru Itoh"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"14719053"},{"@type":"PISSN","@value":"00320781"}],"prism:publicationName":[{"@value":"Plant and Cell Physiology"}],"dc:publisher":[{"@value":"Oxford University Press 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