CAJ | 학술논문

镉是植物生长的非必需元素,它具有很大的生物毒性,与其它重金属相比,更易被植物吸收积累.通过采用营养液水培试验的方法,研究了外源一氧化氮(Nitric oxide,NO)对不同浓度Cd~(2+)(100μmol L~(-1),300 μmol L~(-1),500μmol L~(-1))胁迫下黄瓜幼苗生长、叶片光合特性以及活性氧代谢的影响.结果表明:300 μmolL~(-1)NO供体硝普钠(Sodium nitrop russide,SNP)能显著缓解镉胁迫对黄瓜植株造成的伤害,对300μmol L~(-1) Cd~(2+)处理的黄瓜幼苗缓解效果最好,可提高幼苗的生长量,增强幼苗叶片超氧物歧化酶(SOD)、过氧化物酶(POD)活性;提高了叶片叶绿素和脯氨酸(Pro)含量;降低了叶片丙二醛(MDA)含量.
력시식물생장적비필수원소,타구유흔대적생물독성,여기타중금속상비,경역피식물흡수적루.통과채용영양액수배시험적방법,연구료외원일양화담(Nitric oxide,NO)대불동농도Cd~(2+)(100μmol L~(-1),300 μmol L~(-1),500μmol L~(-1))협박하황과유묘생장、협편광합특성이급활성양대사적영향.결과표명:300 μmolL~(-1)NO공체초보납(Sodium nitrop russide,SNP)능현저완해력협박대황과식주조성적상해,대300μmol L~(-1) Cd~(2+)처리적황과유묘완해효과최호,가제고유묘적생장량,증강유묘협편초양물기화매(SOD)、과양화물매(POD)활성;제고료협편협록소화포안산(Pro)함량;강저료협편병이철(MDA)함량.
Cadmium is a non-essential element for plant growth which has serious biological toxicity and comparing with other heavy metals,Cadmium is more prone to accumulate in plants.The present stuay was conducted in nutrient solution to investigate the effects of exogenous nitric oxide (NO) on growth of cucumber seedlings,photosynthetic characteristics and active oxygen metabohsm in cucumber leaves under consistently different concentration of Cadmium stress(100 μmol L~(-1),300 μmol L~(-1),500 μmol L~(-1)).The results showed that 300 μmol L~(-1) exogenous sodium nitrop russide(SNP),a nitric oxide donor,could significantly alleviate the injury to cucumber under Cadmium stress.The treatment of SNP showed the best results when cucumber under 300 μmol L~(-1)Cd~(2+) stress,which increased the seedling growth,the activity of SOD,POD,and the content of photosynthetic pignent and proline.Moreover,exogenous nitric oxide markedly decreased the content of MDA under 300μmol L~(-1) Cd~(2+) stress.