ZHAO Xiaohong,LUO Qingxi,RAO Ling.Effects of Exogenous Melatonin on Chilling Tolerance of Cucumber Seedlings Under Low Temperature Stress[J].Northern Horticulture,2017,41(14):55-59.[doi:10.11937/bfyy.20164959]
外源褪黑素在低温胁迫下对黄瓜幼苗抗冷性的影响
- Title:
- Effects of Exogenous Melatonin on Chilling Tolerance of Cucumber Seedlings Under Low Temperature Stress
- Keywords:
- melatonin; low temperature; protective enzymes; antioxidant substances
- 文献标志码:
- A
- 摘要:
- 以“清白”黄瓜为试材，在低温（昼/夜，15 ℃/10 ℃）条件下，研究了不同浓度褪黑素（0、50、100、200、400 μmol?L-1）对黄瓜幼苗生长及抗氧化活性等指标的影响。结果表明：当MT浓度为100 μmol?L-1时生长效果最佳，其株高、茎粗、壮苗指数、叶面积、根冠比分别比对照提高了10.4%、22.9%、57.4%、18.0%、63.6%；超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)等保护酶活性显著升高，在低温处理的第2天，100 μmol?L-1 MT处理的酶活性分别比对照提高了20.7%、28.6%、10.3%。
- Abstract:
- At low temperature (day/night，15 ℃/10 ℃)，with‘Qingbai’cucumber as raw material，the effect of different MT concentrations(0,50,100,200,400 μmol?L-1)on the seedling growth and antioxidant activities of cucumber were studied.The results showed that when MT concentration was 100 μmol?L-1，cucumber growth was the best，the plant height，stem diameter，seedling index，leaf area，root shoot ratio were increased by 10.4%，22.9%，57.4%，18.0%，63.6%.At the second days of low temperature，the activities of superoxide dismutase (SOD)，peroxidase (POD) and catalase (CAT) were significantly increased，compared with the control，100 μmol?L-1 MT respectively increased by 20.7%，28.6%，10.3%.
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备注/Memo
第一作者简介：赵小红（1991-），女，硕士研究生，研究方向为蔬菜生理技术与设施园艺。E-mail:1178943096@qq.com.责任作者：罗庆熙（1957-），男，硕士，副教授，硕士生导师，研究方向为蔬菜生理技术与设施园艺。E-mail：qxluo@swu.edu.cn.