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- W2286136803 abstract "Wetland plants, such as rice, develop aerenchyma, which is formed due to cell collapse, in their roots as pathways for diffusion of oxygen. Understanding of aerenchyma development in their plants is essential to elucidate the resistance mechanism of these plants to waterlogging stress. Synchrotron X-ray micro-computed tomography (micro-CT) is powerful for in-situ three-dimensional visualization of aerenchyma [1]. In this study, we have employed refraction contrast X-ray micro-CT was performed at a bending magnet beamline BL20B2 of SPring-8 to observe when and where aerenchyma starts to form and how they expand. Imbibed rice (Oryza sativa L. ssp. japonica cv. Nipponbare) caryopses were placed and roots were grown in darkness for 2 to 4 days in plastic tubes filled with agar containing Hoagland medium. The effective pixel size of the detector was 2.33 or 4.86 μm/pixel. Dark areas in a tomographic slice of a root were confirmed to correspond to air spaces formed due to cell collapse. Frequency distribution of location of collapsed cells showed it was the highest in the 5th and the 6th tiers from the outside of the endodermis. Air spaces formed due to collapse of a single cell were frequently observed, indicating that aerenchyma initiates at independent locations and then expand. Frequency of location of an adjacent collapsed cell to an existing collapsed cell tended to be higher in the radial and longitudinal direction. Volume of air space including aerenchyma, which were estimated from isosurface models created using tomograms, was confirmed to increase over a period of time. [1] I Karahara et al, Ann Bot 110 (2012) 503-509. C2-O-04 doi:10.1093/jmicro/dfv186" @default.
- W2286136803 created "2016-06-24" @default.
- W2286136803 creator A5084655786 @default.
- W2286136803 date "2015-11-01" @default.
- W2286136803 modified "2023-09-23" @default.
- W2286136803 title "C2-O-04Gliding machinery ofMycoplasma mobile,pathogenic bacterium" @default.
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- W2286136803 doi "https://doi.org/10.1093/jmicro/dfv186" @default.
- W2286136803 hasPublicationYear "2015" @default.
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