CAJ | 학술논문

为了解Cd对豆瓣菜生长的影响，以英国大叶豆瓣菜为试验材料，在营养液栽培条件下，研究了不同浓度Cd处理下，豆瓣菜农艺性状、产量、根系活力、净光合速率（Pn）、抗氧化酶活性、丙二醛（MDA）含量、植物络合素（PCs）含量，以及豆瓣菜不同部位Cd含量的变化。结果表明：较低浓度的Cd处理就会影响豆瓣菜的生长，表现为MDA含量升高，高浓度Cd处理还会导致根系活力和Pn的降低。SOD、POD、CAT和PCs在缓解Cd毒害中具有协同作用，但低浓度Cd胁迫下以PCs的螯合作用为主，随Cd浓度的增加变为以SOD、POD、CAT的抗氧化作用为主。豆瓣菜易积累Cd，当营养液中Cd达到0.20 mg·L-1时，豆瓣菜Cd含量即已超标。认为豆瓣菜是一种Cd敏感型蔬菜，生产中应特别注意Cd的污染。
위료해Cd대두판채생장적영향，이영국대협두판채위시험재료，재영양액재배조건하，연구료불동농도Cd처리하，두판채농예성상、산량、근계활력、정광합속솔（Pn）、항양화매활성、병이철（MDA）함량、식물락합소（PCs）함량，이급두판채불동부위Cd함량적변화。결과표명：교저농도적Cd처리취회영향두판채적생장，표현위MDA함량승고，고농도Cd처리환회도치근계활력화Pn적강저。SOD、POD、CAT화PCs재완해Cd독해중구유협동작용，단저농도Cd협박하이PCs적오합작용위주，수Cd농도적증가변위이SOD、POD、CAT적항양화작용위주。두판채역적루Cd，당영양액중Cd체도0.20 mg·L-1시，두판채Cd함량즉이초표。인위두판채시일충Cd민감형소채，생산중응특별주의Cd적오염。
A hydroponic experiment was carried out to study the effects of Cd on the growth of wa-tercress(Nasturtium officinale R. Br.).The indexes under treatments of different Cd concentration, such as agronomic characters,yield,root activity,net photosynthetic rate (Pn),antioxidant enzyme activity and the concentration of malondialdehyde (MDA),phytochelatins (PCs) and Cd contents changes at different parts of watercress were studied. The results showed that low Cd concentration would influence watercress growth,i.e. the accumulation of MDA would rise,while high Cd concentration would lead to the decline of root activity and Pn.Antioxidases and PCs played a cooperative role in al-leviating Cd toxicity. But the alleviation was dominated by PCs chelation under the condition of low Cd concentration,while it would be dominated by the antioxygenation of SOD,POD,CAT along with the increase of Cd concentration. Cd is easily accumulated in watercress.The Cd concentration in edible parts of watercress had exceeded the limit value of national standards,when the concentration of Cd in the nutrient solution reached 0.20 mg·L-1.In conclusion,watercress is a vegetable of Cd-sensitive type,more attentions should be paid on Cd pollution during its production.