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电镜观察研究表明，在大液泡小孢子时期，小麦药壁表皮细胞含有发达的线体和高尔基体，开始产生嗜锇颗粒。药室内壁细胞具活力旺盛的叶绿体和丰富的细胞器。在花粉粒时期，药壁表皮细胞内充满嗜锇颗粒。药室内壁和花粉囊内也有少量与表皮细胞内相同的嗜锇颗粒。此外，在Ｕ氏体、绒毡层膜、花粉粒周围有大量的与药壁表皮细胞同质的小嗜锇颗粒。花粉成熟时，这些颗粒又减少。据此推测，药壁表皮、药室内壁在花粉发育过程中，尤其是发育后期有提供营养的作用。
Electron microscopy studies have shown that in the period of large vacuole microspore, wheat epidermal cells contain well-developed line body and Golgi apparatus, began to produce osmium-osmotic particles. Pharmacological wall cells with a vibrant chloroplast and rich organelles. During pollen grains, the epidermal cells of the anther wall were filled with osmiophilic particles. There is also a small amount of osmiophilic particles in the inner wall of the drug chamber and in the pollen sac which are the same as in the epidermal cells. In addition, there are a large number of small osmiophilic particles that are homogenous with the epidermal cells of the wall around the U-shaped body, the tapetum and the pollen grains. When the pollen matures, the particles decrease again. It is speculated that the wall of the drug wall, drug wall in the pollen development process, especially in the late stages to provide nutrition.