核果类的流胶病是常见的病害。树体发生流胶后,树势开始衰弱,叶片变小,严重时枝干枯死,危害十分严重。 流胶病的病理过程发生在木质部,病部的形成层停止产生新的韧皮部和木质部,而是向水平方向增生特大的厚壁细胞,其内含物是淀粉堆积而成。树脂是一些细胞的作用产生的酶溶化细胞膜而形成的烷酸胶。由于厚壁细胞增生、细胞膜及淀粉的胶化三者同时进 Drusen is a common disease. After the occurrence of plastic flow tree, the tree began to weaken, the leaves become smaller, severe dry branches dead, the harm is very serious. The pathological process of meningitis occurs in the xylem, and the cambium of the diseased part stops producing new phloem and xylem. Instead, it enlarges the large, thick-walled cells horizontally and accumulates starch. Resins are a group of alkalis formed by the action of cells that catalyze the melting of cell membranes. Due to thick-walled cell proliferation, cell membrane and starch gel three into the same time