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| 玉米叶细胞磷吸收动力学性质 | |
| 引用本文： | 徐中平,姜振芳,郑伟,李坤朋.玉米叶细胞磷吸收动力学性质[J].核农学报,2009,23(1):154-158. |
| 作者姓名： | 徐中平 姜振芳 郑伟 李坤朋 |
| 作者单位： | 1. 日照职业技术学院,山东,日照,276826;山东大学生命科学学院,山东,济南,250100 2. 日照职业技术学院,山东,日照,276826 3. 山东大学生命科学学院,山东,济南,250100 |
| 摘 要： | 利用32P示踪测定了玉米成熟叶的细胞质膜囊泡对磷酸根离子的吸收。结果表明，磷饥饿胁迫下对磷的吸收能力（Vmax）显著增强 (P < 0.01)；在成熟叶片上进行的32P- KH2PO4溶液施加试验显示，叶细胞从质外体中吸收磷与叶片的磷输出相关；在磷饥饿胁迫下，成熟叶片通过木质部输入的磷明显减少，而通过韧皮部输出的磷相对增加。基于上述结果，本研究认为，在缺磷状况下玉米成熟叶的细胞显著增强磷吸收能力，可能有利于从叶片质外体包括木质部中吸收磷，并对增加叶的磷输出具有意义。 |
| 关 键 词： | 玉米 叶 磷饥饿 磷吸收 32P |
KINETICS OF PHOSPHATE UPTAKE BY CELLS OF MAIZE MATURE LEAF |
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| XU Zhong-ping,JIANG Zhen-fang,ZHEN Wei,LI Kun-peng.KINETICS OF PHOSPHATE UPTAKE BY CELLS OF MAIZE MATURE LEAF[J].Acta Agriculturae Nucleatae Sinica,2009,23(1):154-158. | |
| Authors: | XU Zhong-ping JIANG Zhen-fang ZHEN Wei LI Kun-peng |
| Institution: | 1;2;1.Rizhao Polytechnic;Rizhao;Shandong 276826;2.School of Life Science;Shandong University;Jinan;Shandong 250100 |
| Abstract: | Phosphate uptake by plasma membrane vesicles was studied with()~(32)P labeled phosphate and the results indicated that phosphate uptake capacity(V_(max)) of cells of maize(Zea mays L.) mature leaf was enlarged(P<0.01) under phosphorus starvation.Local application of()~(32)P labeled phosphate solutions on mature leaf revealed that a close relationship existed between phosphate uptake by leaf cells from the apoplasts and phosphorus export of the leaf.Furthermore,the investigation on variations of phosphorus c... |
| Keywords: | 32P |
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