Measure of the Photosynthetic Efficiency of the Cabbage Leaves by Using Photo-acoustic Tomography Spectroscopy Technology

By using a new type of photo-acoustic tomography spectroscopy with non-damage and weak signals detection, the normalized photo-acoustic tomography spectroscopy (PAS-CT) and optical absorption characteristic of the green and yellow leaves of the cabbage are measured. The results show that: the leaves of the cabbage could get different levels of photo-acoustic spectroscopy from different chopping frequency. The chloroplast number in the yellow leaves was less than that in the green leaves, so the photosynthesis in the yellow leaves was significantly weakened compared with the green leaves. The more the chloroplast number in the cabbage leaves were, the stronger the photosynthesis was and the higher the photosynthetic efficiency was. The chopping frequency of 24Hz could activate more chloroplasts than 34Hz and improve the photosynthetic efficiency of the cabbage leaves. What's more, it could improve the yield of cabbage. Photo-acoustic tomography spectroscopy is a new way of studying photosynthesis. It has a bright and far-reaching future.