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Title of Journal: Planta

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Abbravation: Planta

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Springer-Verlag

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10.1007/s00425-010-1301-z

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1432-2048

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A rice β13glucanase gene Emphasis Type="Italic

Authors: Linglin Wan Wenjun Zha Xiaoyan Cheng Chuan Liu Lu Lv Caixiang Liu Zhanqi Wang Bo Du Rongzhi Chen Lili Zhu Guangcun He
Publish Date: 2010/11/03
Volume: 233, Issue: 2, Pages: 309-323
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Abstract

Plant β13glucanases are involved in plant defense and development In rice Oryza sativa 14 genes encoding putative β13glucanases have been isolated and sequenced However only limited information is available on the function of these β13glucanase genes In this study we report a detailed functional characterization of one of these genes Osg1 Osg1 encodes a glucanase carrying no Cterminal extension Osg1 was found to be expressed throughout the plant and highly expressed in florets leaf sheaths and leaf blades Investigations using realtime PCR immunocytochemical analysis and a GUSreporter gene driven by the Osg1 promoter indicated that Osg1 was mainly expressed at the late meiosis early microspore and middle microspore stages in the florets To elucidate the role of Osg1 we suppressed expression of the Osg1 gene by RNA interference in transgenic rice The silencing of Osg1 resulted in male sterility The pollen mother cells appeared to be normal in Osg1RI plants but callose degradation was disrupted around the microspores in the anther locules of the Osg1RI plants at the early microspore stage Consequently the release of the young microspores into the anther locules was delayed and the microspores began to degenerate later These results provide evidence that Osg1 is essential for timely callose degradation in the process of tetrad dissolution

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