Ammonium is toxic and is converted to organic nitrogen compounds in the root. 铵有毒，在植物根部被转化为有机含氮化合物。
The hyphal walls of most species of fungi differ from those of plants in being composed of microfibrils of a nitrogenous compound called chitin or a form of fungal cellulose. 很多真菌的菌丝壁与其他植物不同，是由被称做几丁质或菌质纤维素含氮化合物构成的微纤维所组成。
