ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (4): 140-147. doi: 10.7668/hbnxb.201751500

• Tillage and Cultivation·Physiology and Biochemistry • Previous Articles     Next Articles

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

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

CLC Number: 

Cite this article

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.

share this article