我校两年来进行光呼吸筛选试验,筛选出一个晚籼稻品种,其CO_2补偿点显著地比杂交稻和常规稻(如广陆矮四号和红梅早)的CO_2补偿点低,而与玉米和稗草等C4植物的十分接近。经镜检,其维管束鞘发达;鞘细胞中叶绿体数目约7—10个,而红梅早等品种却仅1—2个 In the past two years, we conducted a screening experiment of photorespiration to screen a late indica rice variety with a significantly lower CO 2 compensation point than the CO 2 compensation point of hybrid rice and conventional rice (such as Guanglu Dazao and Hongmei earlier) And barnyard grass and other C4 plants are very close. After microscopic examination, the vascular bundle sheath developed; sheath cells in the chloroplast number of about 7-10, and Hongmei early varieties but only 1-2