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１材料与方法 试材为 Ｍｉｌａｎｏ， Ｎｅｖｅ Ｂｅａｔｒｉｘ， ＳｕｎＲａｙ和Ｍｏｎｔｅ Ｒｏｓａ。１９９７年 ５月中旬，正值花蕾未绽开时，取下剥出花粉，自然干燥后分别包装，做好品种标记，放入干燥皿中于冰箱中低温冷藏。待做光镜和扫描电镜样品制备时取出使用。光学
MATERIALS AND METHODS Samples were Milano, Neve Beatrix, SunRay and Monte Rosa. In mid-May 1997, at a time when the flower buds were not blooming, the pollen was removed and naturally dried before being individually labeled and placed in a dry dish and refrigerated in a freezer. To be light and SEM samples taken out. Optical