CAJ | 학술논문

通过种子发芽试验研究重金属镉（Cd）与铅（Pb）在不同浓度梯度单一和复合胁迫下对玉米种子萌发和幼苗生长的影响。结果表明：低浓度的Cd2+（0.5 mg/L）和Pb2+（10 mg/L）单一处理及其复合处理对玉米种子发芽率、发芽指数及对幼苗的芽长、根长、根数和根突起等具有一定的促进作用；高浓度的Cd2+、Pb2+单一及复合处理对种子萌发和幼苗生长具有抑制作用，且随着处理浓度的增加其抑制作用逐渐增强。高浓度Pb2+（200 mg/L）、Cd2+（100 mg/L）对玉米根长和芽长抑制率的影响最大，芽伸长抑制率与根伸长抑制率最高分别可达到58.86%和79.81%，表明重金属胁迫对根的抑制作用比芽大。在不同胁迫处理中，对玉米种子萌发指标影响最大的是镉铅复合处理，其次是镉处理，最小的是铅处理，表明镉铅复合污染对玉米种子萌发的影响表现形式为协同作用。
통과충자발아시험연구중금속력（Cd）여연（Pb）재불동농도제도단일화복합협박하대옥미충자맹발화유묘생장적영향。결과표명：저농도적Cd2+（0.5 mg/L）화Pb2+（10 mg/L）단일처리급기복합처리대옥미충자발아솔、발아지수급대유묘적아장、근장、근수화근돌기등구유일정적촉진작용；고농도적Cd2+、Pb2+단일급복합처리대충자맹발화유묘생장구유억제작용，차수착처리농도적증가기억제작용축점증강。고농도Pb2+（200 mg/L）、Cd2+（100 mg/L）대옥미근장화아장억제솔적영향최대，아신장억제솔여근신장억제솔최고분별가체도58.86%화79.81%，표명중금속협박대근적억제작용비아대。재불동협박처리중，대옥미충자맹발지표영향최대적시력연복합처리，기차시력처리，최소적시연처리，표명력연복합오염대옥미충자맹발적영향표현형식위협동작용。
Responses of seed germination of maize to single and combined stress of heavy metal cadmium and lead were studied by using a hydroponic method.The main results were as follows:Low concentration of cadmium(0.5 mg/L) and lead(10.0 mg/L) and their combined stress had a great promoting influence on germination rate ,germination index and length of bud ,root length ,root number and root processus of seedling.High concentration of cadmiunl and lead and their combined stress had a great inhibitory effect on seed germination and seedling growth.As the increase of concentration of Cd2+,Pb2+and their combined stress,the inhibitive effect was gradually increased. Length of root and shoot was inhibited under high concentration Pb2+,Cd2+and their combined stress.The maximal inhibitory rate length of root and shoot reached 58.86%and 58.86%respectively.The result showed that heavy metals stress had greater influence on root than shoot.Combined stress of Pb 2+and Cd2+of greatest impact on seed germination , followed by Cd2+,Pb2+stress with minimal impact,which indicated Cd2+and Pb2+combined pollution on maize was synergism action.