• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Effect of low night temperature treatment and recovery on photosynthesis and the allocation of absorbed light energy in tomato (Lycopersicon esculentum Mill.) leaves.
【24h】

Effect of low night temperature treatment and recovery on photosynthesis and the allocation of absorbed light energy in tomato (Lycopersicon esculentum Mill.) leaves.

机译：低温处理和恢复对番茄叶片的光合作用和吸收光能分配的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tomato (Lycopersicon esculentum Mill.) leaves were subjected to a low night temperature (LNT; 9 degrees C) for 3, 6, or 9 d, followed by recovery for 9 d at 15 degrees C. Tomato leaves subjected to a night temperature of 15 degrees C were used as controls. Changes in photosynthesis, chlorophyll fluorescence, and the allocation of absorbed light energy were studied. LNT treatment for 3, 6, or 9 d resulted in the reversible inhibition of the net photosynthetic rate (Pn). The potential activity of photosystem II (PSII; Fv/Fo) was clearly reduced and showed greater sensitivity to LNT treatment than the maximum quantum efficiency of PSII (Fv/Fm). The decline in the actual photochemical efficiency of PSII reaction centres ( Phi PSII) was attributed to a decrease in the photochemical quenching coefficient (qP) and the efficiency of excitation energy capture by open PSII centres (Fv'/Fm'). Meanwhile, the rate of electron transport (ETR) decreased relative to control tomato leaves, and the allocation of light energy absorbed by PSII antennae into the photochemical reaction centres (P) decreased, whereas the allocations to thermal dissipation (D) and excessive energy (E) increased. The effect of LNT treatment at 9 degrees C for up to 9 d on PSII was reversible.
机译：将番茄叶片（Lycopersicon esculentum Mill。）叶片置于低夜间温度（LNT; 9摄氏度）下3、6或9 d，然后在15摄氏度下恢复9 d。夜间温度为15摄氏度的叶子用作对照。研究了光合作用，叶绿素荧光和吸收光能分配的变化。 LNT处理3、6或9 d可逆抑制净光合速率（P n ）。光系统II（PSII; F v / F o ）的潜在活性明显降低，并且比PSII的最大量子效率（F v / F m ）。 PSII反应中心（Phi PSII ）实际光化学效率的下降归因于光化学猝灭系数（qP）的降低和开放PSII中心捕获激发能的效率（F v '/ F m '）。同时，相对于对照番茄叶片，电子传输速率（ETR）降低，PSII触角吸收到光化学反应中心（P）的光能分配减少，而热耗散（D）和过量能量的分配（ E）增加。在9摄氏度下LNT处理长达9 d对PSII的影响是可逆的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号