中文摘要：

果实韧皮部卸载是园艺学科研究的一个热点,本文综述了北方果实葡萄、苹果、核桃和枣的韧皮部卸载方式研究,讨论了共质体卸载方式和质外体卸载方式之间的联系,并就目前情况提出了自己的看法。

英文摘要：

The fruit phloem unloading is a research focus of horticulture. This paper summarized the phloem unloading of the northern fruit about grape, apple and walnut, discussed the links between symplast unloading and apoplast unloading. Finally, The article put forward own views about the present situation