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农作物干重的90—95％来自光合作用对二氧化碳(CO_2)的固定,而作物对太阳光能的利用率只有1—3％,因此,如何培育高光效的新品种,以提高作物的产量,便越来越引起人们的重视。近年来,关于作物光合作用产物碳_3碳_4类型的研究指出,光呼吸低的作物如玉米、高粱、甘蔗等,光合效能高,干物质积累多,CO_2补偿点低,它们的光合作用最初产物为四碳化合物,故称碳_4作物;光呼吸高的作物如水稻、小麦等,光合效能低,干物质
90-95% of crop dry weight comes from photosynthesis carbon dioxide (CO2) fixation, and crop utilization of solar energy is only 1-3%, so how to cultivate new varieties of high light efficiency, in order to improve crop yield, It will attract more and more people’s attention. In recent years, studies on the type of carbon-3 carbon-4 photosynthesis in crops have pointed out that photosynthesis with low photosynthesis, such as corn, sorghum, sugarcane, has high photosynthetic efficiency, more dry matter accumulation and lower CO2 compensation point The initial product is a four-carbon compound, so that carbon-4 crops; photoresponsive crops such as rice, wheat, low photosynthetic efficiency, dry matter