不同CO2濃度和光照強度下咖啡試管苗的光合特性[外文翻譯]

包括英文原文和完整中文翻譯


中文翻譯：5755字 9頁
英文原文：19466字 13頁



摘要：對不同CO2濃度和不同光量子通量（PPF）下咖啡試管苗的光合特征作初步的研究。采用以下三種方法來測算咖啡試管苗的凈光合速率：（1）通過測量容器內(nèi)外CO2濃度值來測算其實際凈光合速率；（2）利用上述測量方法分別估算苗齡為10天和30天的試管苗處于不同CO2濃度和光量子通量下的凈光合速率；（3）利用便攜式光合測定系統(tǒng)儀，選取苗齡為45天的咖啡試管苗上某一葉片，對其在不同CO2濃度和光量子通量下的凈光合速率進行測定。結(jié)果表明：咖啡試管苗具有較強的光合能力，并且其凈光合速率隨著容器內(nèi)CO2濃度的上升而上升。CO2飽和點很高(4500–5000μmol mol-1)；然而，盡管容器內(nèi)PPF飽和點也隨著容器內(nèi)CO2濃度的增加而上升，但與其他物種相比較還是較低。

關(guān)鍵詞：阿拉布斯塔種咖啡，CO2增施，CO2飽和點，凈光合速率，PPF飽和點，量子效率





Photosynthetic characteristics of coffee (Coffea arabusta) plantlets in vitro in response to different CO2 concentrations and light intensities

Abstract
The photosynthetic characteristics of coffee (Coffea arabusta) plantlets cultured in vitro in response to different CO2 concentrations inside the culture vessel and photosynthetic photon flux (PPF) were investigated preliminarily. The estimation of net photosynthetic rate (Pn) of coffee plantlets involved three methods: （1）estimating time courses of actual Pn in situ based on measuring CO2 concentrations inside and outside the vessel during a 45-day period, （2）estimating Pn in situ at different CO2 concentrations and PPFs using the above measuring approach for 10-day and 30-day old in vitro plantlets, and （3）estimating Pn of a single leaf at different CO2 concentrations and PPFs by using a portable photosynthesis measurement system for 45-day old in vitro coffee plantlets. The results showed that coffee plantlets in vitro had relatively high photosynthetic ability and that the Pn increased with the increase in CO2 concentration inside the vessel. The CO2 saturation point of in vitro coffee plantlets was high (4500–5000μmol•mol-1); on the other hand, the PPF saturation point was not so high as compared to some other species, though it increased with increasing CO2 concentration inside the vessel.



Key words: Coffea arabusta, CO2 enrichment, CO2 saturation point, net photosynthetic rate, PPF saturation point, quantum efficiency