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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (22): 10-14.doi: 10.11924/j.issn.1000-6850.2013-0723

• 林学 园艺 园林 • 上一篇    下一篇

四倍体与二倍体紫薇光合特性研究

于永畅 王厚新 李承秀 孙忠奎 牛田 孙芳 王长宪 张林   

  • 收稿日期:2013-03-18 修回日期:2013-04-19 出版日期:2013-08-05 发布日期:2013-08-05
  • 基金资助:
    紫薇、观赏石榴等主要绿化树品种优选与高效栽培技术研究开发

Study on Photosynthetic Characteritic of Tetraploid and Diploid Lagerstroemia indica L.

  • Received:2013-03-18 Revised:2013-04-19 Online:2013-08-05 Published:2013-08-05

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摘要： 为了解四倍体紫薇和二倍体紫薇光合生理特性的差异，培育优质林木，采用英国PP-Systems公司产CIRAS-1型便携式光合系统测定人工诱变培育的四倍体紫薇品种和二倍体紫薇品种的各项光合生理参数及其变化规律。结果表明：四倍体和二倍体紫薇的叶片净光合速率日变化都呈单峰型曲线，但峰值出现的时间不同。两个紫薇品种的净光合速率(Pn)、气孔导度(Gs)和水分利用率(WUE)差异显著，蒸腾速率(Tr)、表观量子效率(AQY)和羧化效率(CE)差异不显著。光饱和点(LSP)为二倍体紫薇[1445μmol/(m2?s)]<四倍体紫薇[1670μmol/(m2?s)]，光补偿点(LCP)为二倍体紫薇[12.23μmol/(m2?s)]<四倍体紫薇[42.2μmol/(m2?s)]；CO2饱和点(CSP)为二倍体紫薇[1200μmol/mol]<四倍体紫薇[1427.5μmol/mol]，CO2补偿点(CCP)为二倍体紫薇[32.24μmol/mol]<四倍体紫薇[35.71μmol/mol]。四倍体紫薇单位叶面积叶绿素含量显著高于二倍体紫薇(P<0.05)。

关键词: 香蕉枯萎病, 香蕉枯萎病

Abstract: In order to analyze the differences on photosynthetic characteristics of tetraploid and diploid Lagerstroemia indica L.and develop high- quality forest, CIRAS-1 portable photosynthesis system was employed to measure various photosynthetic physiological parameters and their variation regularities in tetraploid and diploid Lagerstroemia indica L.The results showed that: Both the diurnal change of net photosynthetic rate ( Pn ) of etraploid and diploid Lagerstroemia indica L. showed a single- peak curve,but the peak value appeared at different hours. The net photosynthetic rate, stomatal conductance and water use efficiency had significant difference between the tetraploid and diploid Lagerstroemia indica L.and the transpiration rate, apparent quantum yield and carboxylation efficiency had no significant difference . Light saturation point ( LSP) of diploid Lagerstroemia indica L.[1445μmol/(m2?s)]was lower than that of tetraploid Lagerstroemia indica L.[1670μmol/(m2?s)] and light compensation point ( LCP) of diploid Lagerstroemia indica L.[12.23μmol/(m2?s)] was lower than that of tetraploid Lagerstroemia indica L.[42.2μmol/(m2?s)].CO2saturation point (CSP) of diploid Lagerstroemia indica L.[1200μmol/mol] was lower than that of tetraploid Lagerstroemia indica L.[1427.5μmol/mol] and CO2saturation point ( CCP) of diploid Lagerstroemia indica L.[32.24μmol/mol]was lower than that of tetraploid Lagerstroemia indica L.[35.71μmol/mol]．The chlorophyll content of unit leaf area of tetraploid Lagerstroemia indica L. were significantly higher than that of the diploid Lagerstroemia indica L. ( P ＜0. 05) ．

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