Acta Biologica Hungarica

, Volume 60, Issue 2, pp 211–219 | Cite as

Effect of Foliar Feeding on Nitrogen Assimilation in Alfalfa Plants at Insufficient Molybdenum Supply

  • Marieta Hristozkov
  • Maria Geneva
  • Ira StanchevaEmail author


The influence of foliar feeding on the nitrogen assimilation in alfalfa plants under conditions of Mo shortage was studied. It was established that foliar fertilization with 0.3% solution of Agroleaf ® resulted in increase of nitrogen fixation and nitrogen assimilation in the absence of Mo. Insufficient molybdenum supply leads to significant reduction of plant Mo content and nitrogen-fixing activity, while stress induced amino acids as alanine, GABA, threonine, proline and serine increased repeatedly. The negative effect of Mo deficiency on the enzyme activities related to the primary nitrogen assimilation (NR, GS, GOGAT) and plant growth diminished due to the foliar absorbed nutrients.


Alfalfa Mo deficiency foliar feeding nitrogen assimilation nitrogen fixation 


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© Akadémiai Kiadó, Budapest 2009

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Authors and Affiliations

  • Marieta Hristozkov
    • 1
  • Maria Geneva
    • 1
  • Ira Stancheva
    • 1
    Email author
  1. 1.Acad. M. Popov, Institute of Plant PhysiologyBulgarian Academy of SciencesSofiaBulgaria

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