ACTA AGRICULTURAE BOREALI-SINICA ›› 2012, Vol. 27 ›› Issue (2): 1-5. doi: 10.3969/j.issn.1000-7091.2012.02.001

Special Issue: Rice Biotechnology

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Generation and Characterization of Overexpression Lines of a Rice Pyruvate Kinase Gene OsPK1

ZHANG Yan1,2, PANG Jin-huan3, WU Jia-he3, HE Chao-zu3   

  1. 1. School of Life Sciences, Tsinghua University, Beijing 100084, China;
    2. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China;
    3. State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;
    4. Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, Haikou 570228, China
  • Published:2012-04-28

Abstract: We have reported that downregulation of OsPK1,a rice pyruvate kinase,causes dwarfism,reduced?seed set and so on. Therefore,the aim in this study is to explore the effect of the overexpression of OsPK1 on rice.?The construct containing a CaMV 35S-driven full-length CDS of OsPK1 was introduced into the genome of wild-type?(WT) Nipponbare via an Agrobacterium-mediated method. Three overexpression lines were selected for further characterization and analysis. Statistics showed that these overexpression plants approach WT plants in plant height,tiller?number,panicle length and thousand seed weight,while present slightly reduced seed set and significantly increased?viable seed number per panicle. Quantitative RT-PCR results exhibited that the expressions of four metabolic enzymes were downregulated or upregulated in the young leaves of overexpression plants. The sugar contents were?measured using GC-MS,and the results indicated that the contents of glucose,fructose,galactose and sucrose in OsPK1 overexpression plants showed few differences compared with those of WT plants. Together,the characterization?of OsPK1 overexpression plants can help us better understand the role of OsPK1,and increased viable seed number?per panicle should be a prospective application.?

Key words: OsPK1, Overexpression, Pyruvate kinase, Rice (Oryza sativa L.)

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Cite this article

ZHANG Yan, PANG Jin-huan, WU Jia-he, HE Chao-zu. Generation and Characterization of Overexpression Lines of a Rice Pyruvate Kinase Gene OsPK1[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(2): 1-5. doi: 10.3969/j.issn.1000-7091.2012.02.001.

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