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玉米基因雄性不育系(ms2/ms2)小孢子败育的细胞学研究
引用本文:季良越,季洪强.玉米基因雄性不育系(ms2/ms2)小孢子败育的细胞学研究[J].作物学报,1997,23(5):545-549.
作者姓名:季良越  季洪强
作者单位:河南农业大学,河南郑州,450002
基金项目:国家自然科学基金(批准号:39270448),省自然科学基金资助项目
摘    要:利用光镜和透射电镜对同一核背景的ms2不育花药和正常可育花药进行了小孢子发育的细胞学比较观察。结果表明,ms2不育花药小孢子在幼小孢子期至中小孢子期瓦解。小孢子从四分体释放后,原外壁上没有孢粉素沉积,花粉外壁不能发育。不育花药大多数绒毡层细胞在幼小孢子期显示出明显异常,表现为质体、线粒体等细胞器退化,内质网网络细而少,液泡膜内陷吞噬细胞质,细胞内侧没有乌氏体形成,细胞质内出现大量沉积有浓染颗粒的大

关 键 词:玉米  雄性不育  小孢子  绒毡层  孢粉素  花粉外壁
收稿时间:1995-03-04

Cytological Studies on Microspore Abortion in Genie Male-Sterile Line(ms_2/ms_2)of Corn
Ji Liangyue,Ji Hongqiang,Luo Fuhe,Chen Weicheng Liu Zonghua,Hu Yanmin,Huang Xilin,Tang Jihua.Cytological Studies on Microspore Abortion in Genie Male-Sterile Line(ms_2/ms_2)of Corn[J].Acta Agronomica Sinica,1997,23(5):545-549.
Authors:Ji Liangyue  Ji Hongqiang  Luo Fuhe  Chen Weicheng Liu Zonghua  Hu Yanmin  Huang Xilin  Tang Jihua
Affiliation:Henan Agricultural University, Zhengzhou,450002
Abstract:Comparative observations on microspore development in ms2 genie male-sterile line and its fertile counterpart were made with light and transmission electron microscopy. The results showed the disintegration of microspore in sterile anther occurred from young microspore to intermidiate microspore stage. On release of microspores from the tetrad, the subsequent development of exine was completely inhibited owing to failure of sporopollenin deposition. Most of tapetal cells in sterile anther showed obviously abnormality at young microspore stage. Their plastids and mitochondrias degenerated, endoplasmic reticulums were both delicate and sparse,no dictyosomes were observed. Vacuole membranes sank down and engulfed cytoplasm, no obicule was formed, and a number of large vesiculated structure containing densely stained deposits existed conspicuously in cytoplasm. Tapetal cells completely disintegrated at intermidiate microspore stage. The reason of microspore abortion in sterile enter may be that the abnormality of tapetal organelles resulted in the failure of synthesis or transportation of sporopollenin, as a result, the formation of obicules and pollen exine was completely inhibited and the accumulation of sporopollenin precursors in cytoplasm was accompanied.
Keywords:Corn  Male-sterility  Microspore  Tapetum  Sporopollenin  Pollen exine
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