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对鄂棉２０号棉花种子萌发过程中营养物质动态进行了观察。干种子贮藏的营养物质是蛋白质和脂肪，无淀粉粒。腺体中有多糖成份。胚中各部分的物质积累情况差异较大，胚芽、子叶基部、原维管束及其附近细胞和表皮附近的细胞内蛋白体小而少，其余部位蛋白体大而多。油体多，分散在细胞质中。萌发过程中蛋白质和脂肪逐渐降解，集中在２４～１４４ｈ，不同部位的细胞内贮藏的营养物质降解次序有所差异，代谢旺盛的部位首先降解。萌发过程中有淀粉粒的产生，集中在１～６ｄ。文中还探讨了脂肪降解的途径和淀粉粒积累的营养来源途径。
The dynamic changes of nutrients during the cotton seed germination of E-cotton 20 were observed. Nutrients stored in dry seeds are protein and fat, starch-free granules. Gland polysaccharide composition. The material accumulation in various parts of the embryo is quite different. The embryo, the base of the cotyledon, the primitive vascular bundle and the nearby cells in the embryo, and the intracellular proteins in the epidermis are smaller and smaller, while the remaining parts are large and numerous. More oil bodies, scattered in the cytoplasm. During the germination process, the protein and fat gradually degrade, concentrated in 24 ~ 144h, different parts of the intracellular storage of nutrients in the order of degradation are different, metabolically exuberant parts of the first degradation. During the germination of starch granules, concentrated in 1 ~ 6d. The paper also discusses the ways of lipid degradation and the sources of nutrients that starch grains accumulate.