Journal of Taiwan Agricultural Research

Author:Ming-Hwi Yao*, Shou-Hung Chen and Kung-Shy Chi

Abstract:

    Chlorophyll fluorescence has been used to probe the fate of excitation energy within the photosynthetic apparatus and provide insight into the mechanism and regulation of photosynthesis in vivo. However, no rapid, non-invasive measurement data of chlorophyll fluorescence from the field environment on rice plants was available. In this study, was investigated the change of chlorophyll fluorescence and gas exchange of rice leaves in the field, including the relationship between in various parameters, diurnal change in field and influenced by elevated CO₂ concentration. The results showed the rate of net assimilation of CO₂ of rice leaves can be accurately estimated from the measurements of electron transport rate (ETR) using chlorophyll fluorescence techniques. As compared to common methods measuring the photosynthesis rate based on CO₂ consumption, the approach monitoring chlorophyll fluorescence verified in this study is a useful tool to screen crops with potential productivity and stress tolerance.

Key words:Crop, Photosynthesis, Chlorophyll fluorescence, Electron transport chain

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