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Biologia Plantarum

, Volume 17, Issue 3, pp 223–225 | Cite as

The effect of calcium deficiency on nitrate absorption and assimilation in pumpkin plants

  • I. Prášil
Brief Communication

Abstract

The absorption of nitrate and the activity of nitrate reductase were much lower in Ca-deficient plants ofCururbita pepo L., cv. ‘Kveta’ than in normal plants grown in complete nutrient solution for a period of 8 days. After the addition of nitrate to the nutrient medium, nitrate reductase activity in the roots of NO3-deficient plants sharply rose during the first 6 h and then remained constant during the following 6 h; the content of endogenous NO3 rose slowly and continuously. These processes were depressed in (Ca, NO3)-deficient plants independently of the addition of Ca2+ to the medium in the variant with NO3. Thus it seems that the whole nitrogen metabolism,i.e. both NO3 absorption and the synthesis of nitrate reductase, is impaired in Ca-deficient plants.

Keywords

Nitrate Absorption Nitrate Reductase Nitrate Reduction Nitrate Reductase Activity Normal Plant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Institute of Experimental Botany 1975

Authors and Affiliations

  • I. Prášil
    • 1
  1. 1.Department of Plant Physiology and Soil BiologyCharles UniversityPrague

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