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试验用盆栽黄瓜为材料，研究了草酸对黄瓜叶片中几种与抗病有关的酶的系统诱导作用．结果表明：００４ｍｏｌ／Ｌ的草酸诱导几丁质酶总活性的效果最好；草酸和圆刺盘孢菌在１～７ｄ内可诱导几丁质酶活性持续提高，第７ｄ挑战接种后活性继续上升；草酸和圆刺盘孢菌诱导内切几丁质酶活性提高的倍数显著大于外切几丁质酶；在１～１１ｄ内，草酸对苯丙氨酸解胺酶的诱导效果不明显，而圆刺盘孢菌诱导该酶活性从第４ｄ开始上升；草酸和圆刺盘孢菌对黄瓜叶内过氧化氢酶活性的诱导作用，在前６ｄ表现抑制作用，然后酶活性恢复到对照水平．
Potted cucumber was used as material to study the systemic induction effect of oxalic acid on several disease-resistant enzymes in cucumber leaves. The results showed that 004mol / L oxalic acid induced the best chitinase activity; oxalic acid and Cnidium sp. Could induce chitinase activity continuously within 1 ~ 7d, and challenged the activity after 7d Continue to rise; oxalic acid and Cnidium spores induced endochitinase activity was significantly higher than the exogenous chitinase; in 1 ~ 11d, oxalic acid phenylalanine aminotransferase induction effect is not obvious , While the activity of Cnidium pilosulae increased from the 4th day. The oxalic acid and Cnidium sp. Induced the catalase activity in cucumber leaves, which showed inhibition in the first 6 days, and then returned to the control Level.