岳的又肥又大水多啊喷了-岳好紧好紧我要进去了视频-厨房里抱着岳丰满大屁股

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      文獻速遞 | 作用光光質對葉綠素熒光參數ETR的影響

      來源:北京力高泰科技有限公司 發布時間:2017-09-12 18:01:14 點擊數:953 使用提問 咨詢價格

      LI-6800

      近日,Plant and Cell Physiology期刊上發表了由John R. Evans(澳大利亞國立大學著名學者),Patrick B. Morgan(LI-COR科學家),Susanne von Caemmerer(澳大利亞國立大學著名學者)聯合撰文,題為“Light Quality Affects Chloroplast Electron Transport Rates Estimated from Chl Fluorescence Measurements”的研究論文。本論文在葉綠素熒光參數準確獲取方面又取得了重要進展。

       

      通過葉綠素熒光測量,可計算電子傳遞速率ETR。LI-6800便攜式光合作用測量系統可同步采集氣體交換和葉綠素熒光參數。研究者們通過實測葉綠素熒光參數,計算了電子傳遞速率ETR,并且,在抑制光呼吸的條件下測量了葉片的氣體交換參數。結果發現,如果作用光是藍光,會高估電子傳遞速率ETR近兩倍,而選用紅光則不存在這種情況。本項研究結果與“多層葉片模型”的預測結果一致。因此,在聯合氣體交換和熒光測量參數進行數據分析時(例如,計算葉綠體內CO2濃度),需要謹慎。

       

      Light Quality Affects Chloroplast Electron Transport Rates Estimated from Chl Fluorescence Measurements

      John R. Evans Patrick B. Morgan Susanne von Caemmerer

      Plant and Cell Physiology, pcx103, https://doi.org/10.1093/pcp/pcx103

       

      Abstract

      Chl fluorescence has been used widely to calculate photosynthetic electron transport rates. Portable photosynthesis instruments allow for combined measurements of gas exchange and Chl fluorescence. We analyzed the influence of spectral quality of actinic light on Chl fluorescence and the calculated electron transport rate, and compared this with photosynthetic rates measured by gas exchange in the absence of photorespiration. In blue actinic light, the electron transport rate calculated from Chl fluorescence overestimated the true rate by nearly a factor of two, whereas there was closer agreement under red light. This was consistent with the prediction made with a multilayer leaf model using profiles of light absorption and photosynthetic capacity. Caution is needed when interpreting combined measurements of Chl fluorescence and gas exchange, such as the calculation of CO2partial pressure in leaf chloroplasts.

       


      Plant and Cell Physiology期刊原文鏈接                                    SCI-hub.io原文鏈接                                     
      岳的又肥又大水多啊喷了-岳好紧好紧我要进去了视频-厨房里抱着岳丰满大屁股