| 不同大麦淀粉胚乳细胞中淀粉和贮藏蛋白的积累 |
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| 引用本文： | 王萌,周舟,兰盛银,徐珍秀.不同大麦淀粉胚乳细胞中淀粉和贮藏蛋白的积累[J].中国农业科学,2004,37(10):1464-1467. |
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| 作者姓名： | 王萌 周舟 兰盛银 徐珍秀 |
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| 作者单位： | 华中农业大学生命科学技术学院,武汉,430070 |
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| 基金项目： | 国家自然科学基金资助项目(30070468)，华中农业大学大学生科技创新基金资助项目(2001A10) |
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| 摘 要： | 对3个不同类型的大麦亚种华7618(粉质胚乳)、20A2(角质胚乳)和华2012(中间型)在其淀粉胚乳发育进程中，细胞内淀粉体和蛋白质体的发生、积累过程以及它们的形态变化作了光镜和透射电镜的连续观察。结果表明，粉质大麦华7618，胚乳细胞中大淀粉体增长最快，成熟时体积最大，小淀粉粒数量最多，蛋白质含量低，千粒重最大；角质大麦20A2，胚乳细胞中大淀粉体增长最慢，成熟时体积最小，小淀粉粒数量最少，蛋白质含量高，千粒重最小；中间型大麦华2012则介乎于两者之间。大淀粉体均只含1粒大淀粉粒，大淀粉体的数量在开花第13天以后基本不再增加；蛋白质体在颖果发育前期呈球状颗粒分散于淀粉体间，在颖果发育后期蛋白质体相互融合，沉积在淀粉体之间。在颖果发育中期，淀粉胚乳细胞的核逐步发生变形和解体，而小淀粉粒均在胚乳细胞核解体期间或解体之后发生。
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| 关 键 词： | 大麦 胚乳 淀粉体 蛋白质体 小淀粉粒 细胞结构 |
| 收稿时间： | 2003-7-21 |
The Accumulation of Starch and Storage Protein in Starchy Endosperm Cells of Different Barleys |
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| WANG Meng,ZHOU Zhou,LAN Sheng-yin,XU Zhen-xiu.The Accumulation of Starch and Storage Protein in Starchy Endosperm Cells of Different Barleys[J].Scientia Agricultura Sinica,2004,37(10):1464-1467. |
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| Authors: | WANG Meng ZHOU Zhou LAN Sheng-yin XU Zhen-xiu |
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| Abstract: | Three barley subvarieties Hua7618 (non-waxy), 20A2 (waxy) and Hua2012 (osculant subvariety), which were different in endosperm types, were used in this report. During endosperm development, the initiation and accumulation of starch and storage protein as well as their morphological changes in endosperm cells of those subvarieties were observed sequentially by optical microscope and transmission electron microscope. The results showed that in Hua7618 endosperm cells, the size increase of large starch granules was the quickest and the average volume of them till grain maturation was the largest compared with the other subvarieties, while the 1 000-grain weight and the number of small starch granules were the greatest and the content of protein was the least. The situation in 20A2 endosperm cells was just opposite to Hua7618, and the situation in Hua2012 was intervenient. One amyloplast contained one large starch granule in endosperm cells, its number hardly increased after 13 days after flowering. Protein bodies were dispersed spherical particles at the prophase of caryopsis development. They fused with each other at the anaphase of caryopsis development and deposited among starch granules. Nuclei in endosperm cells deformed gradually at the metaphase of caryopsis development, and the initiation of small starch granules occurred during or after nuclei disruption. |
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| Keywords: | Barley Endosperm Amyloplast Protein body Small starch granule Cell structure |
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