Through photosynthesis the algal cells provide simple sugars and vitamins for both partners in this symbiotic association.
藻类细胞透过光合作用提供简单的糖类和维生素给这两个共生结构体。
Symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate the formation of root nodules, enlargements of plant cells and bacteria in close association.
共生的固氮菌侵袭宿主植物的根毛，并在此繁殖和促进根瘤的形成、植物细胞和亲密共生细菌的扩大。
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