Plant and Soil

, Volume 252, Issue 2, pp 349–357 | Cite as

Resource remobilization in Quercus ilex L. resprouts

  • Bouchra El Omari
  • Xavier Aranda
  • Dolors Verdaguer
  • Gemma Pascual
  • Isabel FleckEmail author


We studied the source of the nitrogen used for the growth and resprouting of holm-oak (Quercus ilexL.), and the contribution of nitrogen and carbohydrate root reserves to these processes. Three-year-old plants were grown in a greenhouse with either a sufficient or restricted nitrogen supply for one year. Half the individuals were subjected to shoot excision to provoke resprouting, and a 15N solution was given to these plants and to controls for two months. Nitrogen, Total Non-structural Carbohydrate (TNC), Total Soluble Protein content, and 15N and 13C composition were determined, and histological analyses of woody tissue were performed. Our results show that N-deprived plants used nitrogen from root reserves to support a growth rate similar to that of non-deprived plants. However, deprived plants lost their resprouting capacity in spite of the high TNC accumulation and nitrogen resupply to the soil. After the supply of nitrogen was restored to N-deprived plants, this nutrient mainly accumulated in under-ground organs, which limited the above-ground growth. Resprouting plants first remobilized the nitrogen stored in roots, and thereafter took it up from the solution. The root-crown region did not behave as a specialised reserve organ in three-year-old Quercus ilex L. plants.

holm-oak nitrogen absorption nitrogen remobilization nitrogen storage resprouts total non-structural carbohydrates 


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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Bouchra El Omari
    • 1
  • Xavier Aranda
    • 1
  • Dolors Verdaguer
    • 2
  • Gemma Pascual
    • 2
  • Isabel Fleck
    • 1
    Email author
  1. 1.Departament de Biologia Vegetal. Unitat de Fisiologia Vegetal. Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Departament de Ciències Ambientals. Unitat de Biologia Vegetal. Facultat de CiènciesUniversitat de GironaGironaSpain

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