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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (24): 236-239.

所属专题： 园艺

• 农学 农业基础科学 • 上一篇    下一篇

油茶优良无性系光合作用的日变化

王 瑞,陈永忠,王湘南,彭邵锋,杨小胡,王玉娟,陈隆升   

  • 收稿日期:2009-09-08 修回日期:2009-09-28 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:

    国家科技部“十一五”科技支撑项目“油茶高产优质培育技术研究”

Diurnal Variation of Photosynthesis in Superior Clones of Camellia oleifera

  • Received:2009-09-08 Revised:2009-09-28 Online:2009-12-20 Published:2009-12-20

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摘要：

以油茶优良无性系“湘林67”为试材，采用LI-6400P便携式光合测定系统对其净光合速率（Pn）、蒸腾速率(Tr)等日变化规律及其影响因子进行了研究。结果表明:(1)上、下部叶片的净光合速率为宽大的单峰型，无光合午休现象；（2）上、下部叶片的蒸腾速率为典型的单峰型，水分利用效率为双峰型；（3）影响净光合速率的主要因子为光合有效辐射、参比室H2O浓度、参比室CO2浓度及胞间CO2浓度，影响蒸腾速率的主要因子为相对湿度、气孔导度、光合有效辐射、胞间CO2浓度及叶面饱和水汽压亏缺。

关键词: 枣树, 枣树, 生物学特性, 杂交育种, 研究进展

Abstract:

Taking Camellia oleifera superior clone “XL67” as materials and using the Li-6400 portable photosynthesis system, diurnal dynamics of net photosythetic rate (Pn), transpiration rate(Tr), and impact factors of Pn and Tr were researched in this paper.The results showed that:(1) Diurnal variation of net photosynthetic rate (Pn) presented a single peak curve, and no midday depression existed;(2) The diurnal variation curve of transpiration rate presented a single peak curve and the diurnal variation curve of WUE presented a double peak curve;(3) Through multiple regression analysis ,it was showed that the main factors which influenced Pn were PAR、H2OR、CO2Rand Ci, and Cond was the main factor for medium-yield variety, and Tr were mainly influenced by RH、Cond 、PAR、Ci and Vpdl.