Labunskaia E A, Zhigalova T V, Chub V V
Ontogenez. 2007 Nov-Dec;38(6):471-80.
Leaf anatomy was studied in the mosaic Ficus benjamina cv. Starlight and non-chimeric Ficus benjamina cv. Daniel. The number of chloroplasts in a white, chlorophyll-deficient tissue declines as compared to the green tissue. However, their functional activity is retained. The leaf of the mosaic F. benjamina contains two or, sometimes, three subepidermal layers. Mesophyll forms one layer in the green and white parts of leaf palisade and one white and one green layer in the transitional zone (edge). In the transitional zone, green spongy mesophyll is located between two white spongy layers and the proportion of photosynthesizing cells varies. In cv. Daniel, there are two subepidermal layers and one layer of columnar mesophyll cells. According to the morphometry data, the proportion of white zone in the leaf correlates with the leaf position in the whole shoot: the higher the branch order, the larger the proportion of white zone. The total leaf area depends also on its position in the shoot. No such correlation was found in non-chimeric F. benjamina cv. Daniel. In the mosaic chimera, the source-sink status appears to depend on the leaf position in the shoot. Experiments with individual shoots of the same order and elimination of all lateral shoots have shown that the proportion of white zone in new leaves on the shoot increases with the total area of green zone. Thus, the area of assimilating shoot surface affects the formation of leaves in the meristem. A hypothesis was put forward that the source-sink state affects the ratio of green and white parts in the leaf primordium. Products of photosynthesis (carbohydrates) are a possible metabolic signal affecting the meristem. It cannot be excluded as well that the hormonal state undergoes changes in the chimeric plant.
对花叶榕品种“星光”和非嵌合体榕品种“丹尼尔”的叶片解剖结构进行了研究。与绿色组织相比，白色、缺乏叶绿素组织中的叶绿体数量减少。然而，它们的功能活性得以保留。花叶榕的叶片包含两层，有时为三层亚表皮层。叶肉在叶片栅栏组织的绿色和白色部分形成一层，在过渡区（边缘）形成一层白色和一层绿色层。在过渡区，绿色海绵状叶肉位于两层白色海绵状叶肉之间，光合细胞的比例各不相同。在“丹尼尔”品种中，有两层亚表皮层和一层柱状叶肉细胞。根据形态测量数据，叶片中白色区域的比例与它在整个枝条上的位置相关：枝条的分枝级数越高，白色区域的比例越大。叶片总面积也取决于它在枝条上的位置。在非嵌合体榕品种“丹尼尔”中未发现这种相关性。在花叶嵌合体中，源 - 库状态似乎取决于叶片在枝条上的位置。对同一级别的单个枝条以及去除所有侧枝的实验表明，枝条上新叶中白色区域的比例随着绿色区域的总面积增加。因此，同化枝条表面的面积会影响分生组织中叶片的形成。有人提出一个假说，即源 - 库状态会影响叶原基中绿色和白色部分的比例。光合作用产物（碳水化合物）可能是影响分生组织的代谢信号。也不能排除嵌合体植物中激素状态会发生变化。
