舞花姜种子的解剖学和组织化学研究

舞花姜种子表面只许多表皮毛，基部具黄白色的种阜状结构。假种皮着生于种阜结构内缘，基部筒状，中上部指状分裂；假种皮细胞长条形．内含许多细小淀粉粒。种皮由外珠被发育而来．可划分为外种皮、中种皮与内种皮。外种皮由具３—５（６）层表皮细胞的复表在构成，最外层的一些表皮细胞向强突起形成表皮毛。中种皮由下皮层、半透明细胞层、中种皮薄壁细胞层与色素层构成。下皮层由一层下皮细胞构成，细胞内充满结合有单字的红褐色色素；半透明细胞含有与脂类结合的淡黄褐色无定形块状物，中种皮薄壁细胞内无色素或任何颗粒状物；色素层为中种皮最内方的一层，细胞体积大、充满与单宁结合的红褐色色素。内种在由一层体积小、壁局部增厚的砖形薄壁细胞构成，其机械保护作用小。种子在珠孔区分化出珠孔领、孔盖及种阜状结构。珠孔领为异形型，孔盖不具石细胞硬层。种阜状结构以其细胞层数增多、壁增厚并本质化的复表皮加强了珠孔区的机械保护作用。合点区内种皮出现缺口．缺口间充满通常呈多角形的合点区色素细胞，其整体轮廓为长条形。外胚乳细胞壁平直，细胞内充满淀粉粒，部分细胞还含有少量的蛋白质与脂类：近合点外胚乳形成一薄区。内胚乳细胞含有蛋白质、脂类与淀粉．其细胞轮廓清楚，椭圆形或不规?

ANATOMY AND HISTOCHEMISTRY OF THE SEEDS OF GLOBBA RACEMOSA

The seed surface of Globba racemosa Smith is of many epidermal hairs and a caruncle-like structure with yellow-white coloured on the micropylar end of the seed. With tube-shaped lower part, the aril is connected with innet edge of the carun-le-like Structure. Its upper part is of 10-15 finger-shaped lobes. The aril cells with linear shape contain many small starch grains.The seed coat developed from outer integument can be divided into exotesta,mesotesta and endotesta.The exotesta comprises multiple epidermis with 3-5 (6) layers of epidermal cells,and some cells of the outermost layer of exotcsta partly protrude outward and form epidermal hairs.The mesotesta includes hypodermis, translucent cell layer, parenchymatous cell layer and pigment cell layer.The hypodermis with one layer of hypodermal cells contains red-brown coloured pigment combining with tannin. Translucent cells contain slightly yellow-brown coloured amorphic lumps which combine with lipid.The parenchymatous cells do not contain pigment or any granular material. The pigment cell layer is the innermost layer of the mesotesta and its cells with large volume coatain red-brown coloured pigment which combines with tannin. The endo-testa consists of one layer of brick-shaped parenchymatous cells with pattially thickened wall and very small volume.Its protective function is very weak. Micropylar collar,operculum and caruncle-like structure are differentiated at the micropylar reeion. Micropylar collars belong to heteromorphic type.Operculums are without sclerotic cell.The caruncle-like structure teinforce the protective function of micropylar region through increase in its layers of multiple epidermis cells with thickened and lignified wall.A gap appears in the endotesta of the chalazal region and is filled up with a group of pigment cells with principally polygonal shaped. The outline of the pigment cell group is linear shape.The perisperm cells with flat walls and filled up with stareh grains, form a narrow zone adjacent to chalazal region and some cells cotain a few protein and lipid. The endosperm cells contain ptotein, lipid and starchThe cell walls of endosperm cells are clearly observed and their shape mainly are elliptic or irregUlar.Small amount of idioblast are found and scattered mainly in the beae of the embryo.