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一、种子形态构造和成分 棉铃每室有发育种子7—9粒,除棉瓤尖端仅有一粒外,其余成对排列。棉子形状多为椭圆形,大头为基部(合点端),圆钝;小头为顶端(珠孔端),尖锐。种皮棕黑色,表面有脉纹。种子的一面有一道缝线,叫作子脊。种子外面除长纤维外,一般有短纤维附着。在轧花后,外面附有短绒的棉子称为毛子,没有短绒的称为光子,仅在种子一端或两端有短绒的,叫丛毛子(或端毛子)。种子大小通常用子指(百粒种子重)来表示,一般陆地棉品种的子指为10克左右。在棉株外围和上部果枝的棉铃内,种子较小。在一个
First, the seed structure and composition Cotton bolls each room has 7-9 seeds, except for the tip of cotton sliver only one, the rest arranged in pairs. Mostly oval-shaped cotton, the bulk of the base (at the junction), round dull; small head for the top (Bead hole), sharp. Seed coat brown black, veins on the surface. There is a stitching on the side of the seed, called the spine. In addition to long seeds outside the seeds, the general short-fiber attachment. After ginning, the cotton wool attached to the linter outside is called the hairs, and there is no linter called photon. The cotton hairs (or end hairy hairs) are called short fibers only at one or both ends of the seed. Seed size is usually used sub-means (one hundred seed weight) to indicate that the general land cotton varieties of the child refers to about 10 grams. In cotton bolls in the periphery of the plant and in the upper fruiting branch, the seeds are smaller. in a