华北农学报 ›› 2019, Vol. 34 ›› Issue (4): 140-147. doi: 10.7668/hbnxb.201751500

• 耕作栽培·生理生化 • 上一篇    下一篇

不同浓度褪黑素对豆瓣菜镉积累的影响

黄科文1, 林立金2, 王均1, 刘继3, 刘磊3, 王铤3, 廖明安1, 任纬4   

  1. 1. 四川农业大学 园艺学院, 四川 成都 611130;
    2. 四川农业大学 果蔬研究所, 四川 成都 611130;
    3. 成都市农林科学院, 四川 成都 611130;
    4. 四川省内江市农业科学院 玉米研究所, 四川 内江 641000
  • 收稿日期:2019-02-26 出版日期:2019-08-28
  • 通讯作者: 廖明安(1957-),男,四川仁寿人,教授,博士,博士生导师,主要从事果树生理生态及栽培研究。
  • 作者简介:黄科文(1992-),男,四川双流人,在读博士,主要从事果树生理生态研究。
  • 基金资助:
    四川省教育厅资助项目(17ZB0342)

Effects of Different Concentrations of Melatonin on Cadmium Accumulation of Nasturtium officinale

HUANG Kewen1, LIN Lijin2, WANG Jun1, LIU Ji3, LIU Lei3, WANG Ting3, LIAO Mingan1, REN Wei4   

  1. 1. College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China;
    2. Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China;
    3. Chengdu Academy of Agricultural and Forestry Sciences, Chengdu 611130, China;
    4. Institute of Maize Research, Neijiang Academy of Agricultural Sciences, Neijiang 641000, China
  • Received:2019-02-26 Published:2019-08-28

摘要: 为提高豆瓣菜对镉胁迫抗逆性的同时有效降低其镉含量,采用盆栽试验,研究了在镉(5 mg/kg)胁迫下,不同浓度褪黑素(0,25,50,100,150,200 μmol/kg)对豆瓣菜生物量、镉含量、光和色素含量、抗氧化酶活性以及土壤酶活性、pH、有效态镉含量的影响。结果表明,与对照相比,褪黑素有效提高了豆瓣菜叶片超氧化物歧化酶、过氧化物酶、过氧化氢酶的活性,且均随着褪黑素浓度的升高呈现上升的趋势。豆瓣菜根、茎、叶的生物量及叶片光合色素(叶绿素a、叶绿素b、类胡萝卜素)的含量均随着褪黑素浓度的升高出现先上升后下降的趋势,并在褪黑素浓度为50 μmol/kg时达到最大值;而豆瓣菜根、茎、叶的镉含量随着褪黑素浓度的升高出现先下降后上升的趋势,并在褪黑素浓度为50 μmol/kg时最低,分别较对照降低了9.82%,7.42%,8.19%。另外,与对照相比,褪黑素显著提高了种植过豆瓣菜的土壤有效态镉含量及土壤蔗糖酶的活性,且随着褪黑素浓度的升高出现上升的趋势;而随着褪黑素浓度的升高,土壤pH值则出现下降的趋势。综上,适宜浓度的褪黑素可以在提高豆瓣菜对镉胁迫抗逆性的同时有效降低豆瓣菜对土壤镉的吸收,其中褪黑素浓度为50 μmol/kg时效果最好,可为镉污染地区豆瓣菜的栽培生产提供参考。

关键词: 豆瓣菜, 褪黑素, 镉, 生长

Abstract: In order to improve the resistance of Nasturtium officinale to cadmium(5 mg/kg)stress and reduce its cadmium content, the pot experiment was conducted to study the effects of different concentrations of melatonin(0, 25, 50, 100, 150, 200 μmol/kg)on the biomass, cadmium content, photosynthetic pigment content, antioxidant enzyme activity of N. officinale, and enzyme activity, pH value and available cadmium content of soil. The results showed that melatonin effectively increased the superoxide dismutase, peroxidase, catalase activities of N. officinale leaves compared with the control, and all increased with the increase of melatonin concentration. The biomasses of roots, stems and leaves, and leaf photosynthetic pigment(chlorophyll a, chlorophyll b, carotenoid)content of N. officinale increased first and then decreased with the increase of melatonin concentration, and reached the maximum when melatonin concentration was 50 μmol/kg. The cadmium contents in roots, stems and leaves of N. officinale decreased first and then increased with the increase of melatonin concentration, and were the lowest when the concentration of melatonin was 50 μmol/kg, which were 9.82%, 7.42% and 8.19%, respectively, lower than control. In addition, compared with the control, melatonin significantly increased the soil available cadmium content and soil invertase activity after planting N. officinale, and presented an increased trend with the increase of melatonin concentration, while the soil pH value decreased with the increase of melatonin concentration. In conclusion, the appropriate concentration of melatonin could effectively reduce the cadmium absorption of N. officinale and improve the resistance of N. officinale to cadmium stress. Melatonin concentration of 50 μmol/kg was the best, which could provide a reference for the cultivation and production of N. officinale in cadmium contaminated areas.

Key words: Nasturtium officinale, Melatonin, Cadmium, Growth

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引用本文

黄科文, 林立金, 王均, 刘继, 刘磊, 王铤, 廖明安, 任纬. 不同浓度褪黑素对豆瓣菜镉积累的影响[J]. 华北农学报, 2019, 34(4): 140-147. doi: 10.7668/hbnxb.201751500.

HUANG Kewen, LIN Lijin, WANG Jun, LIU Ji, LIU Lei, WANG Ting, LIAO Mingan, REN Wei. Effects of Different Concentrations of Melatonin on Cadmium Accumulation of Nasturtium officinale[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(4): 140-147. doi: 10.7668/hbnxb.201751500.

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