The potential sources of NO in plants include nitric oxide synthase, nitrate reductase, xanthine oxidoreductase and the nonenzymatic pathway.NO can enhance plant growth;

• 在植物中, NO的潜在来源包括一氧化氮合成酶、硝酸还原酶、黄嘌呤氧化还原酶和非酶促途径。