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        Developmental stage-dependent differential gene expression of superoxide dismutase isoenzymes and their localization and physical interaction network in rice (Oryza sativa L.)

        Krishna Nath,이춘환,Susheel Kumar,Roshan Sharma Poudyal,양영남,Rupak Timilsina,박유신,Jayamati Nath,Puneet Singh Chauhan,Bijaya Pant 한국유전학회 2014 Genes & Genomics Vol.36 No.1

        Superoxide dismutase (SOD) isoenzymes areessential for scavenging excess reactive oxygen species inliving organisms. So far, expression pattern of SOD isoenzymesgenes along leaf development plus their sub-cellularlocalization and physical interaction network have notyet been clearly elucidated. Using multiple bioinformaticstools, we predicted the sub-cellular localizations of SODisoforms and described their physical interactions in rice. Using in silico approaches, we obtained several evidencesfor existence of seven SOD genes and a SOD copperchaperone gene. Their transcripts were differentiallyexpressed along with different developmental stage of riceleaf. Finally, we performed quantitative real time-polymerasechain reaction (qRT-PCR) to validate in silico differential expression pattern of SOD genes experimentally. Expression of two cytosolic cCuZn-SODs was highduring the whole vegetative stage. Two plastidic Fe-SODswere found and their expression levels were very low andstarted to increase from the late vegetative stage. Theirexpression patterns were very similar to each other, indicatingthe formation of heterodimer. However, theirexpression patterns are different from those for ArabidopsisFe-SODs. The expression of pCuZn-SOD was very high inthe early developmental stage, but qRT-PCR results weredifferent, which remains for further study. From the resultson the differential expression of SOD genes, we canunderstand the role of each SOD gene and even predicttheir role under certain circumstances based on in silicoanalysis.

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