%0 Journal Article
%T THE EFFECTS OF SIMULATED ACID RAIN ON NITROGEN METABOLISM OF EUCOMMIA ULMOIDES LEAVES<br>模拟酸雨对杜仲叶氮代谢的影响
%A QI Ze-Min ZHONG Zhang-Cheng
%A and DENG Jun
%A <br>齐泽民
%A 钟章成
%J 植物生态学报
%D 2001
%I Editorial Office of Chinese Journal of Plant Ecology
%X The effects of simulated acid rain on important N-metabolism enzymes and correlated substances were studied by treating spring and summer leaves of Eucommia ulmoides to simulated rain with varying pH levels. In both seasons it was found that below a threshold value of pH the activities of nitrate reductase (NR), glutamine synthetase (GS), glutamate dehydrogenase (GDH) and glutamic-pyruvic transaminase (GPT) declined with decreasing pH, though the rate of decrease of these enzymes were higher in the summer. It was also found that soluble protein and total nitrogen content decreased with decreasing pH of acid rain. Total free amino acid content was negatively correlated with pH in both seasons. We conclude from these results that simulated acid rain had significant effects on N-metabolism of Eucommia ulmoides leaves.
%K Simulated acid rain
%K Eucommia ulmoides
%K N-metabolism<br>模拟酸雨
%K 杜仲叶
%K 氮代谢
%K 中药材
%K 生理生态特性
%K 逆境
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=82C405AA21487F06&yid=14E7EF987E4155E6&vid=C5154311167311FE&iid=94C357A881DFC066&sid=B34BDD6A690A04C0&eid=E5D85F291CED2DA6&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=8&reference_num=24