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山茶花变异的外因是很多的,不仅嫁接(反复嫁接、重叠接、嫁接嵌合体)有可能引发变异,而且植株受到严重机械挫伤(包括全方位重修剪),所处的环境和遇到的气候发生了重大变化以及辐射、药物浇灌等物理性和化学性的刺激,都会不同程度地使植株某些细胞的遗传基因受到触动,即外因通过植株内因直接影响DNA的位置,出现了跳跃基因,在重新组合排列后发生花色、花型或叶面的变异。例如,笔者莳养多年的一盆‘花牡丹’(花底色红,上夹白斑块)山茶,1992年冬同时在一个枝条上对称地开了两朵花。一朵色殷红、桃红相辅,冠形活泼;另一朵变化很大,色红、粉、白相间,外轮以白色为主,云纹四布,全朵花为瓣丛成束,非常漂
Variation of camellia is due to a number of external causes, not only grafting (repeated grafting, overlapping grafting, grafting of chimeras) is likely to induce variation and the plant is severely mechanically contused (including omnidirectional re-pruning), the environment in which it occurs and the climate encountered Significant changes and radiation, drug irrigation and other physical and chemical stimuli, will to some extent plant some of the cells of the genetic genes are touched, that is due to external factors through the plant DNA directly affect the position of the DNA, appeared jumping genes, in the re- After the combination of arrangement of flower color, flower pattern or leaf surface variation. For example, in the 1992 winter, two flowers were symmetrically opened on a twig at the same time in a pot of peony flowers (red in the background and white patches on the leaves) for many years. A color of bright red, pink, crown-shaped lively; the other a great change, color red, pink, white and white, the outer wheel white, moire four cloth, the whole flower petals into bundles, very