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Position: Home > Articles > Identification and Analysis of a Rice Lignin Monomer Synthesis Deficient Mutant Journal of Nuclear Agricultural Sciences 2015,29 (3) 428-434

一个水稻木质素单体合成突变体的鉴定及分析

作  者:
陈蕾;李秋圆;叶胜海;金庆生;张小明
单  位:
浙江省农业科学院作物与核技术利用研究所
关键词:
水稻;木质素;单体合成;脆秆;亚细胞定位
摘  要:
在粳稻品种浙粳88经60Co-γ射线辐照产生的后代中,获得1个茎秆脆弱的水稻突变体浙粳88GH。利用m(a)ule试剂测定木质素成分,与野生型浙粳88相比,浙粳88GH的皮层和维管束木质素单体成分改变。在基因初定位基础上,利用PCR扩增和基因测序对第2条染色体90kb目标区域中候选基因进行分析,证明LOC_Os02g09490基因第1个外显子191位碱基由C突变为G。通过生物信息学方法对到LOC_Os02g09490基因的家族谱、蛋白质三维结构进行分析,并通过qRT-PCR方法检测到LOC_Os02g09490基因在浙粳88根、茎、叶中的组成型表达和在浙粳88GH中极低水平表达。构建2个亚细胞定位载体并通过农杆菌介导的方法在烟草中瞬时表达,第1次试验证明LOC_Os02g09490蛋白定位在细胞核与细胞膜。
译  名:
Identification and Analysis of a Rice Lignin Monomer Synthesis Deficient Mutant
作  者:
CHEN Lei;LI Qiuyuan;YE Shenghai;JIN Qingsheng;ZHANG Xiaoming;Institute of Crops and Nuclear Technology Utilization,Zhejiang Academy of Agricultural Science;Nanjing Institute for the Comprehensive Utilization of Wild Plants;College of Life and Environment Sciences,Shanghai Normal University;
关键词:
rice,lignin,monomer synthesis,brittle stem,subcellular localization
摘  要:
A brittle stem mutant ‘Zhejing 88GH'was obtained from japonica rice variety ‘Zhejing 88 'by irradiated mutation with60 Co gamma rays. M( a) ule reagent was used to measure the composition of lignin in ‘Zhejing 88 GH'.Lignin monomer composition in cortex and vascular bundle area in the mutant is different from that in the wild type‘Zhejing 88'. PCR and gene sequencing for the candidate genes within the target regions of 90 kb on Chromosome 2showed that there was a mutation in the 191 st base in the first exon( C to G) of LOC_Os02g09490. The gene family spectrum and the three-dimensional structure of LOC_Os02g09490 protein were also analyzed. qRT-PCR result showed that this gene was constitutively expressed in roots,stems and leaves in ‘Zhejing'88 while has low expression level or even no expression in ‘Zhejing88 GH'. Furthermore,with subcellular localizations of two vectors using Agrobacteriummediated transformation,LOC_Os02g09490 was first localized in both nucleus and cell membrane.

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