论文部分内容阅读
核桃（ＪｕｇｌａｎｓｒｅｇｉａＬｉｎｎ．）果皮的发育过程可分为３个阶段，发育时期：外、中、内三层果皮的界线不清，维管束处于发育初期；发育中期：随着中果皮最外侧两层石细胞的出现和薄壁组织细胞体积的迅速扩大以及维管束轮数的增加，使三层果皮具较明显的界线；发育后期：中果皮的维管束递增到４－５轮，内果皮逐渐转化为坚硬的木质化石细胞层。核桃的中果皮内分布的维管束，其类型除外韧型外，还有内韧、双韧、周韧型及不规则类型。由于核桃果实有苞片及花被参加发育，作者认为不是一种真正的核果，可称之为“似核果”
The developmental process of the peel of Juglans regia Linn. Can be divided into three stages. During the developmental stages, the boundary of the peel of the outer, middle and inner three layers is unclear, and the vascular bundle is in the early stage of development. In the middle stage of development, with the outermost two layers of stone The appearance of cells and the rapid expansion of the parenchyma cells and the increase of the number of vascular bundles increased the obvious demarcation between the three layers of peel. In the late development stage, the mesocarp bundle increased to 4-5 and the endocarp gradually transformed into Hard woody fossil cell layer. Walnut mesocarp distribution within the vascular bundle, except for the type of toughness, but also tough, tough, tough and irregular type weeks. As the walnut fruit and bract participate in the development of bracts, the author believes that is not a true drupe, can be called “drupe”