不同co2浓度和光照强度下咖啡试管苗的光合特性[外文翻译].doc

不同CO2浓度和光照强度下咖啡试管苗的光合特性[外文翻译]

包括英文原文和完整中文翻译


中文翻译：5755字 9页
英文原文：19466字 13页



摘要：对不同CO2浓度和不同光量子通量（PPF）下咖啡试管苗的光合特征作初步的研究。采用以下三种方法来测算咖啡试管苗的净光合速率：（1）通过测量容器内外CO2浓度值来测算其实际净光合速率；（2）利用上述测量方法分别估算苗龄为10天和30天的试管苗处于不同CO2浓度和光量子通量下的净光合速率；（3）利用便携式光合测定系统仪，选取苗龄为45天的咖啡试管苗上某一叶片，对其在不同CO2浓度和光量子通量下的净光合速率进行测定。结果表明：咖啡试管苗具有较强的光合能力，并且其净光合速率随着容器内CO2浓度的上升而上升。CO2饱和点很高(4500–5000μmol mol-1)；然而，尽管容器内PPF饱和点也随着容器内CO2浓度的增加而上升，但与其他物种相比较还是较低。

关键词：阿拉布斯塔种咖啡，CO2增施，CO2饱和点，净光合速率，PPF饱和点，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