Welcome to Acta Prataculturae Sinica ! Today is Share:

Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (10): 74-82.DOI: 10.11686/cyxb2023466

Previous Articles     Next Articles

A study of the mechanism of nitrate nitrogen-induced cytokinin enhancement of strontium enrichment in Avena sativa

Lin QI1,2(), Yun BAO2, Ying-bo YANG3, Xiao-ling WANG2, Wei ZHAO2   

  1. 1.College of Agriculture,Henan University of Science and Technology,Luoyang 471023,China
    2.Shangqiu Station of National Field Agro-ecosystem Experimental Network,Farmland Irrigation Research Institute,CAAS,Shangqiu 453000,China
    3.Department of Geography Science,School of Geography and Environment,Xianyang Normal University,Xianyang 712000,China
  • Received:2023-12-01 Revised:2023-12-25 Online:2024-10-20 Published:2024-07-15

Abstract:

This research investigated the effect of nitrate nitrogen on strontium enrichment ability of oat (Avena sativa) seedlings. The oat variety “Neimengkeyi-1” was used in the experiment. Three levels of strontium (0, 400 and 800 mg·kg-1) and two levels of nitrate nitrogen (0 and 100 mmol·L-1) were applied as treatments in a pot experiment. After 30 days of nitrate nitrogen treatment, the strontium uptake and distribution patterns, growth index, and leaf cytokinin concentration of the oat seedlings were examined. It was found that: 1) The dry weight of oat seedlings decreased with increasing concentration of strontium. However, nitrate nitrogen alleviated the inhibitory effect of the strontium on the growth of the oats. 2) The ability of oat tissues to accumulate strontium ranked: root>leaf>stem. Nitrate nitrogen promoted the accumulation of strontium and increased the strontium translocation of strontium within oat seedlings. 3) The cytokinin concentration increased with increase in the nitrate nitrogen concentration. The cytokinin concentration was positively correlated with the translocation factor. In conclusion, capacity for strontium accumulation was strongest in the roots. Nitrate nitrogen enhanced increase in cytokinin concentration on exposure to strontium and the resistance to strontium in oats. This study provided data applicable to strengthening phytoremediation of strontium contaminated soil.

Key words: oat, strontium, accumulation, cytokinin