不同生育期脆性突变水稻细胞壁组分动态变化研究  

Kinetic study on cell wall components for brittleness mutation rice at different growth stages

作　　者：苏衍菁[1] 赵国琦[1] 王小山[1] 严长杰[2] 吕宗友[1] 

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州225009 [2]扬州大学植物功能基因组学教育部重点实验室江苏省作物遗传生理重点实验室,江苏扬州225009

出　　处：《草业学报》2010年第1期151-157,共7页Acta Prataculturae Sinica

基　　金：科技部支撑项目(2006BAD04A03-07)资助

摘　　要：试验以伽马射线辐射选育的脆性突变(brittleness mutation,BM)水稻和亲本中花11(Zhonghua 11)为材料,分析分蘖期、抽穗期(约50%抽穗)、成熟期细胞壁纤维组成动态变化特点。结果表明,1)整个生育期BM水稻都具有茎叶易折的特点。2)对照亲本各部位的纤维素含量有先升高后降低的变化趋势,半纤维素含量前期变化不显著,后期显著下降;BM水稻各部位的纤维素含量则表现出逐渐升高的趋势,半纤维素含量尽管有逐渐下降的趋势,但变化不显著。3)与对照亲本相比,BM水稻细胞壁纤维组分变化较大:分蘖期,BM水稻茎、叶、鞘纤维素含量分别极显著下降34.69%,25.89%和28.85%(P<0.01),而半纤维素含量则分别极显著上升15.77%,31.31%和19.32%(P<0.01);抽穗期,BM水稻茎、叶、鞘纤维素含量分别极显著下降32.31%,32.25%和34.69%(P<0.01),而半纤维素含量则分别极显著上升25.39%,32.78%和20.91%(P<0.01);成熟期,两者纤维素差异不显著,但BM水稻茎、叶、鞘半纤维素含量依然极显著高于对照亲本。鉴于以上特征,BM水稻具有作为饲料稻的潜在优势。The kinetic changes of cell wall components between brittleness mutation （BM） rice [Obtained by gamma-ray （7） treatment] for seeds and its wild type from japonica variety Zhonghua-11 was investigated. 1） BM-rice stem and leaves had brittle and fragile characters in all growth stages. 2） For wild type rice, cellulose content increased during vegetative growth, and then decreased during reproductive growth. Hemi-cellulose content was not changed significantly in the forward process, but decreased drastically in the backward process. For BM-rice, cellulose content was increased gradually over the whole life of the plant. Hemi-cellulose content showed a decreasing trend, but this was not significant between the growth stages. 3） At the tillering stage, the cellulose content of BM-rice stem, leaf and sheath significantly decreased （P〈0.01） by 34.69%, 25.89% and 28.85 %, respectively compared with that of wild type but the corresponding hemi-cellulose content signifi- cantly increased （P〈0.01） by 15.77%, 31.31% and 19.32%, respectively. At the heading stage, the cellulose content of BM-rice stem, leaf and sheath significantly decreased （P〈0. 01） by 32. 31%, 32. 25% and 34.69%, respectively and the hemi-cellulose content significantly decreased （P〈0.01） by 25.39%, 32.78% and 20.91%, respectively. At maturation, BM-rice and CK-rice cellulose content were not significantly （P〈0.05） different, but hemi-cellulose contents of BM-rice stem, leaf and sheath were significantly higher than those of the CK-rice. Above all, BM-rice has a potential advantage for utilization as a fodder-rice.

关 键 词：脆性突变水稻 不同生育期 细胞壁组分 饲料稻 

分 类 号：S54[农业科学—作物学]