以水稻１１０３ｓ和亲本８９０２ｓ为材料，研究在降温条件下植株间断失绿性状表达过程中叶绿体蛋白质谱带、蛋白质含量与蛋白酶活性、光合作用变化。结果表明，在降温条件下，随性状表达１１０３ｓ的叶绿素含量下降，叶绿素ａ／ｂ值上升；在叶绿体蛋白质谱带中，２０ＫＤ、２５ＫＤ、５０ＫＤ等主带含量减少。从同一叶片性状表达的绿区与黄区叶绿体蛋白质比较看，黄区缺少１８ＫＤ，这说明同一叶片不同区域叶绿体蛋白质低温反应不同，从而造成蛋白质降解也不同，这是间断失绿性状表达的基础。从降温结束到性状表达（约２ｄ～３ｄ），叶片蛋白质含量下降与蛋白酶活性提高呈显著负相关；当性状逐渐消失时，蛋白质含量与叶绿素含量同步增长。据此认为，１１０３ｓ的间断失绿性状可能是由核基因控制，该基因在降温条件诱导下启动。 Rice 1103s and 8902s were used as materials to study the changes of chloroplast protein bands, protein content, protease activity and photosynthesis in the process of intermittent loss of chlorosis. The results showed that under the condition of decreasing temperature, the content of chlorophyll decreased with the increase of 1103s, and the chlorophyll a / b value increased. In the chloroplast protein band, the contents of main bands such as 20KD, 25KD and 50KD decreased. Compared with the chloroplast proteins in the yellow zone of the same leaf traits, the lack of 18KD in the yellow zone indicates that chloroplast proteins react differently in different regions of the same leaf, resulting in different protein degradation, which is the basis for the expression of intermittent chlorotic traits. From the end of cooling to the trait expression (about 2d ~ 3d), the decrease of protein content in leaves was significantly negatively correlated with the increase of protease activity. When the traits disappeared gradually, the protein content and chlorophyll content increased synchronously. Therefore, the intermittent chlorotic trait of 1103s may be controlled by the nuclear gene, which is started under the condition of cooling.