Under high light intensity the activities of AsA- POD and GSSG reductase were greatly increased by ammonium nutrition, however, the activity of MDASA reductase was considerably inhibited.

• 强光下供应镀态氮叶片中AsA-POD和GSSG还原酶活性明显地高于供应硝态氮的叶片，而MDAsA还原酶活性则相反。