CAJ | 학술논문

采用水培试验方法,分别研究了不同浓度重金属镉胁迫背景下,添加或不添加EDTA处理的桑苗叶片丙二醛含量45 d的动态变化。实验结果表明：（1）桑苗叶片的丙二醛含量与镉浓度有关,在21 d～27 d内,丙二醛含量呈波动上升趋势,之后呈波动下降趋势;（2）与不添加EDTA的对照组比较,加入EDTA处理的桑苗叶片丙二醛含量波动比较平缓,随镉胁迫时间的增加,其叶片中的丙二醛含量缓慢增加;（3）低浓度的镉离子对桑苗生长有一定的促进作用,但浓度较高时会对其造成一定的伤害,使其生长受到抑制,叶片变黄,萎蔫,甚至死亡;（4）EDTA能适当缓解镉离子对桑苗的伤害。
채용수배시험방법,분별연구료불동농도중금속력협박배경하,첨가혹불첨가EDTA처리적상묘협편병이철함량45 d적동태변화。실험결과표명：（1）상묘협편적병이철함량여력농도유관,재21 d～27 d내,병이철함량정파동상승추세,지후정파동하강추세;（2）여불첨가EDTA적대조조비교,가입EDTA처리적상묘협편병이철함량파동비교평완,수력협박시간적증가,기협편중적병이철함량완만증가;（3）저농도적력리자대상묘생장유일정적촉진작용,단농도교고시회대기조성일정적상해,사기생장수도억제,협편변황,위언,심지사망;（4）EDTA능괄당완해력리자대상묘적상해。
By water-implantation experiment,different concentrations of Cd2＋ are added to the nutrient solution respectively.In each solution of one group,treatment with 0.55 mmol/L EDTA is compared to the other groups untreated with EDTA.The dynamic changes of malondialdehyde（MDA） content in the Morus alba leaves for 45 days are investigated.The results show that：（1） there are some relationship between MDA contents in Morus alba leaves and Cd2＋ concentration in the solution.During the period of 21 to 27days,MDA content of the leaves has a rising trend of fluctuation at first,and then declines in a fluctuating state;（2） Compared with the groups untreated with EDTA,MDA content in the leaves not only remains at a relative stable level,but also increases gradually with time prolonging;（3）When Cd2＋ concentration is at a lower level,it will promote the growth of Morus alba seedling,but when Cd2＋concentration is at a higher level,such poisonous effects will happen,that is,the growth of the seeding will be inhibited,and the leaves of seedings will turn yellow or wither;（4） EDTA can alleviate Cd2＋ poisonous effects on Morus alba seedlings.