蓖麻种子结构的解剖和显微观察

郭学民,赵晓曼,徐珂,王芯蕊,张辰瑜,东方阳

Anatomy and microscopic observation of Ricinus communis seed structure

Xue-Min GUO,Xiao-Man ZHAO,Ke XU,Xin-Rui WANG,Chen-Yu ZHANG,Yang DONG-FANG

图1 蓖麻种子的形态 A: 种子腹面观, 示外种皮的纹饰和种脊(箭头); B: 去外种皮的种子, 示内种皮维管束(箭头)的分布; C: 去种皮的种子, 示乳白色的胚乳; D: 与子叶平面垂直的正中纵切面, 示胚在种子中的位置; E: 游离的胚, 示子叶、胚轴和胚根; F: 去部分种皮、胚根突破种孔的萌发种子, 示种孔在种阜背侧, 并未被种阜覆盖。HI: 种脐; CA: 种阜; EN: 胚乳; TE: 种皮; EM: 胚; CO: 子叶; HY: 胚轴; RA: 胚根。Bar = 2 mm。

Fig. 1 Shape of R. communis seed A: ventral view of a seed, showing the ornamentation and raphe (arrow) of a seed; B: a seed without episperm, showing the distribution of vascular bundles (arrow) in endopleura; C: a seed without testa, showing the milky white endosperm; D: median longitudinal section perpendicular to the plane of cotyledon, showing the position of an embryo in a seed; E: a free embryo, showing cotyledon, hypocotyle and radicle; F: a germinating seed with partial testa and radicle breaking through the micropyle, showing the micropyle on the dorsal side of the caruncle and not covered by the caruncle. HI: Hilum; CA: Caruncle; EN: Endosperm; TE: Testa; EM: Embryo; CO: Cotyledon; HY: Hypocotyle; RA: Radicle. Bar = 2 mm.