| 低磷胁迫下玉米根中磷的运转与再利用 |
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| 引用本文： | 樊明寿,陈刚,孙国荣.低磷胁迫下玉米根中磷的运转与再利用[J].作物学报,2006,32(6):946-948. |
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| 作者姓名： | 樊明寿 陈刚 孙国荣 |
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| 作者单位： | 1内蒙古农业大学农学院，内蒙古呼和浩特 010019；2扬州大学农学院; 3扬州大学生命科学与技术学院, 江苏扬州 225009 |
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| 基金项目： | 中国科学院资助项目;教育部留学回国人员科研启动基金 |
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| 摘 要： | 磷在植物体内可被活化和循环利用，因此磷的再利用程度成为评价植物磷营养效率的重要指标。低磷胁迫下植物根皮层细胞解体形成通气组织的过程中，原细胞内磷素可能被转运到根尖用于根轴的伸长从而扩大吸收范围，并提高体内磷素的利用效率。本研究旨在检验这一假设。试验结果表明，在低磷胁迫下，玉米种子根皮层细胞的磷素在细胞解体过程中主要被转运往茎叶重新利用。
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| 关 键 词： | 通气组织 磷 再利用 玉米 32P示踪 |
| 收稿时间： | 2005-05-09 |
| 修稿时间： | 2005-11-02 |
Phosphorus Remobilization and Reuse in Maize Roots under Phosphorus Deficiency |
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| FAN Ming-Shou,CHEN Gang,SUN Guo-Rong.Phosphorus Remobilization and Reuse in Maize Roots under Phosphorus Deficiency[J].Acta Agronomica Sinica,2006,32(6):946-948. |
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| Authors: | FAN Ming-Shou CHEN Gang SUN Guo-Rong |
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| Institution: | 1.College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, Inner Mongolia;2.College of Agronomy, Yangzhou University;3.College of Life Science, Yangzhou University, Yangzhou 225009, Jiangsu, China |
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| Abstract: | The mobilization and transportation of phosphorus from old tissues to young and active metabolized tissues are important physiological processes in plant, so the extent or degree of phosphorus recycling in plant has been considered as one of indexes for evaluating plant phosphorus efficiency. The previous researches have shown that parts of root cortical cells are formed lysigenons aerenchyma when maize plant is subjected to phosphorus deficiency. The present study was to test the hypotheses that phosphorus might be mobilized and transported from the root cortical cells with lysis to root apex for root enlongation. ^32p isotope tracing technique was used in this study, and the results indicated that phosphorus stored or pre-existed in roots would be remobilized in maize under phosphorus deficiency from root cortical cells with lysis to shoot mostly rather than root apex during aerenchyma formation. |
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| Keywords: | Aerenchyma Phosphorus Recycle Maize ^32p isotope tracing |
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