| 氮素形态对烤烟光合特性影响的研究 |
| |
| 引用本文： | 郭培国,陈建军,郑燕玲.氮素形态对烤烟光合特性影响的研究[J].植物学报,1999,16(3):262-267. |
| |
| 作者姓名： | 郭培国 陈建军 郑燕玲 |
| |
| 作者单位： | 1(广州师范学院生物系 广州 510405） 2（华南农业大学农学系 广州 510642） |
| |
| 摘 要： | 1996～1997年连续二年进行了固定氮素用量，改变铵态、硝态氮肥的施用比例试验，对烤烟的一些光合生理特性进行了研究。试验结果表明，在烤烟生长前、中期，增施铵态氮施用比例，烤烟的叶绿素含量增加，但达100％铵态氮时，叶绿素含量反而下降，低于施用50％和75％铵态氮的处理；在烤烟生长后期．功能叶片叶绿素含量基本上与施用铵态氮比例高低—致，以100％铵态氮处理的叶绿素含量最高。另外增加铵态氮施用比例，烤烟功能叶片的希尔反应活性及光合磷酸化活性有所提高，但P/O比值基本不变。从叶绿素诱导荧光动力学特征参数及比值情况来看：增加铵态氮施用比例，Fm和Fv值升高；几种荧光参数的比值如Fd/Fs、Fv/Fo、Fv/Fm比值有所上升，但均以25％硝态氮+75％铵态氮的处理最高；并且其烤后烟叶的产量最高、品质最好。
|
| 关 键 词： | 烤烟 氮素形态 光合特性 |
Study on the Effects of Nitrogen Forms on Photosynthetic Characteristics in Flue-Cured Tobacco |
| |
| Guo Pei-guo,Chen Jian-jun and Zhang Yan-lin.Study on the Effects of Nitrogen Forms on Photosynthetic Characteristics in Flue-Cured Tobacco[J].Bulletin of Botany,1999,16(3):262-267. |
| |
| Authors: | Guo Pei-guo Chen Jian-jun and Zhang Yan-lin |
| |
| Institution: | 1(Department of Biology, Guangzhou Teachers' College, Guangzhou 510405) 2(Department of Agronomy, South China Agricultural University, Guangzhou 510642) |
| |
| Abstract: | The effects of nucleic acid antimetabolite on photoperiod-sensitive genic male sterility in rice (PGMR) were studied by the application of 5-fluorouracil (5-FU) to leaves. The results showed that 5-FU treatments decreased the panicle length and the spikelet number of Nongken 58S, but hastened heading and to some extent recoveried the fertility of PGMR under LD conditions; whereas 5-FU treatments inhibited the pollen fertility and the heading of rice varieties under SD conditions. The effects can be partially reversed by oratic acid. It can be concluded that photoperiod-sensitive genic male-sterility is caused by the changes of the metabolism of nucleic acid in young panicle. |
| |
| Keywords: | , |
|
| 点击此处可从《植物学报》浏览原始摘要信息 |
| 点击此处可从《植物学报》下载免费的PDF全文 |
