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园艺学报 ›› 2001, Vol. 28 ›› Issue (1): 41-46.

• 研究论文 • 上一篇    下一篇

低温弱光对番茄叶片光合作用和叶绿素荧光参数的影响

胡文海;喻景权*   

  1. (浙江大学园艺系, 杭州310029)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-02-25 发布日期:2001-02-25

Effects of Chilling under LowLight on Photosynthesis and ChlorophyllFluorescence Characteristic in Tomato Leaves

Hu Wenhai and Yu Jingquan
  

  1. (Department of Horticulture, Zhejiang University, Hangzhou 310029)
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-02-25 Published:2001-02-25

摘要: 低温弱光(温度5、10 ℃和光强60 μmol·m-2·s-1) 导致番茄植株生长停滞, 叶绿素含量、净光合速率、气孔导度和胞间CO2 浓度下降, 但经5 ℃处理的植株下位叶的胞间CO2浓度与对照无显著差异。经10 ℃处理的植株在正常生长条件下净光合速率能迅速恢复到对照水平, 而5 ℃处理的植株则恢复缓慢。10 ℃处理对光系统Ⅱ的光化学效率Fv/ Fm并无显著影响, 光系统Ⅱ光合电子传递量子效率ΦPS Ⅱ在低温处理后期略有下降并能迅速恢复; 5 ℃处
理下Fv/ Fm和ΦPS Ⅱ均随处理时间的延长而降低, 且需恢复4 d 后才回升至对照水平。

关键词: 番茄, 低温, 光合作用, 叶绿素荧光

Abstract: Exposure of tomato plants to low temperature (10 ℃ and 5 ℃) under low light (60 μmol·m-2·s-1) resulted in an completely inhibition of plant growth and decreased chlorophyll content , net photosynthetic rate (Pn) , stomatal conductance (Gs) and intracellular CO2 (Ci) concentration except Ci for the lower leaves during chilling at 5 ℃. During the recovery , Pn for 10 ℃treatment arose to a value similar to control , but Pn for 5 ℃treatment did not . Chilling at 10 ℃did not affect Fv/ Fm , but slightly decreasedΦPS Ⅱalthough it recovered soon after chilling stress. However , chilling at 5 ℃ considerably decreased Fv/ Fm and ΦPS Ⅱ, and both recovered slowly after
chilling stress.

Key words: Lycopersicon esculentum Mill ., Chilling, Photosynthesis, Chlorophyll fluorescence

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