笔者选育的四季橘花斑变异无性系植株 ,其叶片、枝条和果实均表现出不同程度的黄绿镶嵌花斑 .研究表明 ,其变异原因是由于茎尖分生组织的L -Ⅱ组织原层发生失绿突变 ,致使其衍生的组织和器官不能合成叶绿素 ,从而形成白 (黄 )化现象 ;又由于L -Ⅱ与L -Ⅲ组织原层层间发生部分代换 ,致使白 (黄 )化突变呈黄绿镶嵌的花斑 . The four seasons orange mosaic mutant clonal plant, the leaves, branches and fruits showed varying degrees of yellow mosaic mosaic.The study shows that the variation is due to the shoot apical meristem L-Ⅱ tissue Layer causes a loss of green mutation, resulting in its derived tissues and organs can not synthesize chlorophyll, resulting in the formation of white (yellow) phenomenon; and L-Ⅱ and L-Ⅲ organization of the original layer of the partial substitution, resulting in white (yellow) The mutation was yellow-green inlaid mosaic.