蓖麻种子结构的解剖和显微观察
Anatomy and microscopic observation of Ricinus communis seed structure
A: 种子背侧外种皮垂直于种子长轴横切面, 示长柱状表皮层、海绵组织层和栅栏组织层; B: 外种皮表皮细胞横切面, 示表皮细胞椭圆形形态; C: 种子侧面外种皮垂直于种子长轴横切面, 示长柱状表皮层、海绵组织层和栅栏组织层; D: 种子腹侧外种皮沿种脊延伸方向的横切面, 示柱状表皮层、海绵组织层和栅栏组织层以及位于海绵组织层的大型维管束; E: 种子腹侧外种皮垂直于种脊延伸方向的横切面, 示大型维管束; F: 内种皮分布示意图, 示在种阜端内种皮内层和外层围成的气室; G: 外种皮腹侧内侧体视显微镜图像, 示种阜端外种皮和内种皮外层不易分离, 以及种脊大型维管束在种阜相对一端与内种皮维管束索的连接点(箭头); H: 内种皮脉间区横切面, 示马氏层、扁平的海绵组织层和内珠被内层; I: 内种皮沿维管束延伸方向的横切面, 示维管束位于海绵组织层中。EP: 表皮层; SP: 海绵组织层; PP: 栅栏组织层; LB: 大型维管束; IE: 内种皮内层; OE: 内种皮外层; ML: 马氏层; IL: 内珠被内层; EB: 内种皮维管束。
A: transection of episperm on the back of a seed perpendicular to the long axis, showing columnar epidermis, spongy parenchyma and palisade parenchyma; B: transection of epidermal cells from the episperm, showing epidermal cells in oval shape; C: transection of lateral episperm of a seed perpendicular to the long axis, showing columnar epidermis, spongy parenchyma and palisade parenchyma; D: transection of episperm at the ventral surface of a seed along the direction of raphe extension, showing columnar epidermis, spongy parenchyma, palisade parenchyma, and the large bundle in spongy parenchyma; E: transection of episperm at the ventral surface of a seed perpendicular to the direction of ridge extension, showing large vascular bundle; F: a schematic diagram of the distribution of endopleura, showing an air chamber surrounded by inner and outer layers of endopleura at caruncle end; G: stereomicroscopic image from the inner side of the ventral episperm, showing the nonseparable pattern of episperm and endopleura, and the junction point (arrow) between the large bundle of raphe and the bundle band of endopleura at the opposite end of the caruncle; H: transection of endopleura from the vein-islet, showing malpighian layer, flat spongy parenchyma and inner layer of inner integument; I: transection of endopleura along the direction of bundle extension, showing the vascular bundle located in spongy parenchyma. EP: epidermis; SP: spongy parenchyma; PP: palisade parenchyma; LB: large bundle; IE: inner layer of endopleura; OE: outer layer of endopleura; ML: malpighian layer; IL: inner layer of inner integument; EB: endopleura vascular bundle.
