| 刘仕翔,黄益宗,罗泽娇,黄永春,保琼莉,王培培,袁彪,李文华.外源褪黑素处理对镉胁迫下水稻种子萌发的影响[J].农业环境科学学报,2016,35(6):1034-1041. |
| 外源褪黑素处理对镉胁迫下水稻种子萌发的影响 |
| Effects of exogenous melatonin on germination of rice seeds under Cd stresses |
| 投稿时间：2015-11-10 |
| DOI：10.11654/jaes.2016.06.003 |
| 中文关键词: 水稻 种子萌发 镉 褪黑素 抗氧化系统 |
| 英文关键词: rice seed germination Cd melatonin antioxidant system |
| 基金项目:国家科技支撑计划项目(2015BAD05B02);中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所)项目 |
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| 中文摘要: |
| 为探讨外源褪黑素对Cd胁迫下植物生长发育的影响,采用室内培养实验研究外源褪黑素对Cd胁迫下水稻种子萌发及相关生理指标的影响。结果表明:外源褪黑素对Cd胁迫下水稻种子萌发具有一定的促进作用,褪黑素施用可提高水稻种子的发芽率和发芽势,促进水稻幼根和幼芽的生长,当Cd浓度为100 μmol·L-1时,添加100 μmol·L-1褪黑素使得水稻根系活力和总根长分别比对照处理提高15.2%和133.7%;外源褪黑素能显著降低Cd胁迫下水稻幼芽的MDA含量,提高水稻体内的POD、SOD和CAT的活性,当Cd浓度为100 μmol·L-1时,添加10~1000 μmol·L-1褪黑素会使水稻幼芽MDA含量比对照处理降低8.2%~16.0%,POD、SOD和CAT的活性分别比对照处理提高21.3%~45.5%、24.2%~32.2%和77.8%~145.8%。褪黑素可以有效地缓解Cd对水稻的毒害作用。 |
| 英文摘要: |
| Here the effects of exogenous melatonin(MT) on seed germination and physiological indexes of rice under Cd stresses were investigated. Additions of exogenous MT had a positive effect on seed germination and root growth of rice under Cd stresses. At 100 μmol·L-1 of Cd concentration, addition of 10 μmol·L-1 MT increased total root length of rice by 103.2%, and applying 100 μmol·L-1 exogenous MT promoted rice root activity and total root length by 15.2% and 133.7%, respectively, as compared with the control. At 100 μmol Cd·L-1, additions of 10~1000 μmol·L-1 exogenous MT significantly decreased MDA by 8.2%~16.0%, but increased activities of POD, SOD, and CAT by 21.3%~45.5%, 24.2%~32.2% and 77.8%~145.8%, respectively, in comparison with the control treatment. These results suggest that application of exogenous melatonin could effectively alleviate the toxic effects of Cd on rice. |
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