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Characterization of a novel developmentally retarded mutant (drm1) associated with the autonomous flowering pathway in Arabidopsis

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Cell Research 2005年第2期15卷 133-140页

作者： Yong ZHU1,2,*, Hui Fang ZHAO1,3,*, Guo Dong REN1, Xiao Fei YU1, Shu Qing CAO1, Ben Ke KUAI1,4,**1Department of Biochemistry, Ministry of Education Key laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, 220 Handan Road, Shanghai 200433, China 2School of Horticulture and Gardening, Southwest Forestry College, Kun Ming 650224, China 3Department of biology, School of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China4Fudan Centre for Genetic Diversity and designed Agriculture, Fudan University, 220 Handan Road, Shanghai 200433, China Department of Biochemistry Ministry of Education Key laboratory for Biodiversity Science and Ecological Engineering School of Life Sciences Fudan University Shanghai China School of Horticulture and Gardening Southwest Forestry College Kun Ming China Department of biology School of Life and Environment Science Shanghai Normal University Shanghai China Fudan Centre for Genetic Diversity and designed Agriculture Fudan University Shanghai China

A developmentally retarded mutant (drm1) was identified from ethyl methanesulfonate (EMS)-mutagenized M2 seedsin Columbia (Col-0) genetic background. The drm1 flowers 109 d after sowing, with a whole life cycle of about 160 *** also shows a pleiotropic phenotype, e.g., slow germination and lower germination rate, lower growth rate, curlingleaves and abnormal floral organs. The drm1 mutation was a single recessive nuclear mutation, which was mapped tothe bottom of chromosome 5 and located within a region of 20-30 kb around MXK3.1. There have been no mutantswith similar phenotypes reported in the literature, suggesting that DRM1 is a novel flowering promoting locus. Thefindings that the drm1 flowered lately under all photoperiod conditions and its late flowering phenotype was significantlyrestored by vernalization treatment suggest that the drm1 is a typical late flowering mutant and most likely associatedwith the autonomous flowering pathway. The conclusion was further confirmed by the revelation that the transcriptlevel of FLC was constantly upregulated in the drm1 at all the developmental phases examined, except for a very earlystage. Moreover, the transcript levels of two other important repressors, EMF and TFL1, were also upregulated in thedrm1, implying that the two repressors, along with FLC, seems to act in parallel pathways in the drm1 to regulateflowering as well as other aspects of floral development in a negatively additive way. This helps to explain why the drm1exhibits a much more severe late-flowering phenotype than most late-flowering mutants reported. It also implies that theDRM1 might act upstream of these repressors.

关键词： drm1 late-flowering autonomous flowering pathway Arabidopsis thaliana.

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The Movement Protein of Barley Yellow Dwarf Virus Targets AtVOZ1 and AtVOZ2 to Delay flowering in Arabidopsis

The Movement Protein of Barley Yellow Dwarf Virus Targets At...

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中国植物病理学会2017年学术年会

作者： Huang Caiping Tao Ye Chen Yujia Wu Yunfeng State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Crop Pest Integrated Pest Management on the Loess Plateau of Ministry of Agriculture College of Plant ProtectionNorthwest A＆F University

The movement protein（MP） of barley yellow dwarf virus-GAV（BYDV-GAV） was previously considered to bind the viral RNA and transport viral genome,however,a new function of MP of BYDV-GAV on plant physiology was found in this *** Arabidopsis thaliana plants that constitutively expressed MP were produced and exhibited a late-flowering *** key proteins involved in a signal transduction pathway about flowering in Arabidopsis,vascular plant one-zinc protein 1（AtVOZl） and vascular plant one-zinc protein 2（AtVOZ2）,were found to interact with MP by yeast two-hybrid assay and bimolecular fluorescence complementation ***,N-terminal of the MP was confirmed to be essential for the *** result of quantitative real-time PCR（qRTPCR） revealed that MP up-regulated the expression ofAtVDZ1 and AtVOZ2 and also affected other genes in phyB signal transduction ***,our work indicated that MP of BYDV-GAV can delay flowering in Arabidopsis through interacting with AtVOZ1 and *** findings provided new insights into the molecular mechanisms by which MP influence plant growth and development.

关键词： Barley yellow dwarf virus Movement protein AtVOZ1 AtVOZ2 late-flowering

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