CAJ | 학술논문

为了明确外源硅对小麦铬、铜毒害的缓解效应，以普通小麦品种京冬8号为材料，采用水培试验，研究硅（Na2SiO3）对K2Cr2O7（0．6 mmol／L）、CuSO4（0．8 mmol／L）胁迫下小麦幼苗生理生化指标的影响。结果表明：在铬、铜胁迫下，小麦幼苗可溶性糖含量、丙二醛（ MDA）含量、超氧化物歧化酶SOD和过氧化物酶POD活性显著升高，叶绿素含量显著降低；外源硅能显著降低铬、铜胁迫下小麦幼苗的可溶性糖含量、MDA含量以及SOD和POD活性，Na2 SiO3浓度为1．5 mmol／L时，效果最明显；外源硅能显著提高铬、铜胁迫下小麦幼苗的叶绿素含量，Na2 SiO3浓度为1．0 mmol／L时，效果最明显。适当浓度的外源硅能在一定程度上减轻重金属铬、铜胁迫对小麦幼苗的伤害。
위료명학외원규대소맥락、동독해적완해효응，이보통소맥품충경동8호위재료，채용수배시험，연구규（Na2SiO3）대K2Cr2O7（0．6 mmol／L）、CuSO4（0．8 mmol／L）협박하소맥유묘생리생화지표적영향。결과표명：재락、동협박하，소맥유묘가용성당함량、병이철（ MDA）함량、초양화물기화매SOD화과양화물매POD활성현저승고，협록소함량현저강저；외원규능현저강저락、동협박하소맥유묘적가용성당함량、MDA함량이급SOD화POD활성，Na2 SiO3농도위1．5 mmol／L시，효과최명현；외원규능현저제고락、동협박하소맥유묘적협록소함량，Na2 SiO3농도위1．0 mmol／L시，효과최명현。괄당농도적외원규능재일정정도상감경중금속락、동협박대소맥유묘적상해。
In this study,using wheat variety(Jingdong 8) as material,effects of exogenous silicon on physiologi-cal and biochemical indexes of wheat seedlings under K 2 Cr2 O7 (0.6 mmol/L) and CuSO4 (0.8 mmol/L) stresses were studied in hydroponic conditions .The results showed that the soluble sugar content ,MDA content ,the activity of SOD and POD in wheat seedlings were significantly increased under K 2 Cr2 O7 and CuSO4 stresses.The chlorophyll content in wheat seedlings were reduced significantly under K 2 Cr2 O7 and CuSO4 stresses.Exogenous silicon with the concentration of 1 .5 mmol/L played a noticeable role in reducing the soluble sugar content ,MDA content ,the activ-ity of SOD and POD in wheat seedlings under K 2 Cr2 O7 and CuSO4 stresses.Exogenous silicon with the concentration of 1.0 mmol/L played a noticeable role in creasing the chlorophyll content in wheat seedlings under K 2 Cr2 O7 and CuSO4 stresses.Exogenous silicon with appropriate concentration could alleviate the damage caused by K 2 Cr2 O7 and CuSO4 stresses to the wheat seedlings .