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玉米授粉后10天,盾片处于组织分化期,细胞中已有少量脂体和淀粉粒,上皮细胞的细胞质明显浓于其内部的薄壁细胞,线粒体、质体、核糖体也较薄壁细胞中多。授粉后20天,盾片细胞中液泡消失,形成了大量脂体和淀粉粒,上皮细胞与胚乳相邻的壁及径向壁外段次生加厚,具内部的薄壁细胞中自上而下开始形成蛋白质体。授粉后35天,上皮细胞发育成径向略长的形状,径向壁加厚达细胞的2/3处,仍呈薄壁状态的壁处有发达的胞间连丝;其内部的薄壁细胞中形成了许多蛋白质体。成熟籽粒的盾片中,上皮细胞的细胞核明显,其径向壁的内段仍保持薄壁状态,外段的加厚壁有波状内突,胞质中含有大量脂体和少数淀粉粒,无蛋白质体但有许多蛋白质基质;上皮细胞以内的薄壁细胞中有大量球形蛋白质体、脂体和较多淀粉粒,脂体有规律地排列在蛋白质体周围。盾片发育后期,淀粉粒逐渐减少,蛋白质体增多。
Ten days after the pollination of corn, the scutellum was in the stage of tissue differentiation. There were a few lipid and starch granules in the cells. The cytoplasm of the epithelial cells was obviously thicker than the parenchyma cells in the epithelium. The mitochondria, plastid and ribosome also had more parenchyma cells More. Twenty days after pollination, the vacuole disappeared and a large amount of lipid and starch granules were formed. The epithelial cells were adjacent to the endosperm and the outer wall of the radial wall was secondary thickened, with the inner parenchyma cells starting from the top to the bottom The formation of proteosomes. 35 days after pollination, the epithelial cells developed into a slightly longer radial shape, the radial wall thickening up to 2/3 of the cells, still thin walled state of the wall at the developed cell rod; its internal thin wall Many proteins are formed in cells. Mature grain scutellum, the nucleus of epithelial cells was obvious, the inner wall of the radial wall remains thin walled state, the outer wall of the thickened wall with wavy internal processes, the cytoplasm contains a large number of lipid and a few starch grains, no Proteosomes have many protein matrices; many parenchyma cells within epithelial cells have a large number of globular proteosomes, liposomes and more starch granules, and lipids are regularly arranged around the proteosomes. Late scutellum development, starch grains gradually reduced, proteosome increased.