Influence of the ionic form of mineral salts on growth of faba bean andRhizobium leguminosarum

  • M. M. El-Shinnawi
  • Nafisa A. El-Saify
  • Tayseer M. Waly
Research Papers


The nodulation and growth of faba bean plants (Vicia faba cultivar ‘Giza 2’) at 2 months' age were studied in pot trials using an alluvial clay soil (pH 7.9). Chlorides, carbonates and sulphates of Na+, K+, Ca2+, and Mg2+ were added at 20 mEq/100 g soil and the tolerance ofRhizobium leguminosarum (biovar.viceae, Strain F-15) grown on pure culture medium, salinized with the same salts, was then tested. Salts were generally inhibitory towards plant and bacterium. Number and characteristics of plant root-nodules, dry weight of plants (shoots and roots), N content in plants and the bacterial colony count decreased. Chlorides were the most inhibitory in soil and carbonates the most in culture medium, whilst sulphates were the least inhibitory in either case. Na+ gave maximum inhibition, whereas Mg2+ was the least detrimental. Formation of effective nodules on roots of the plants grown in the salinized soil was very poor, butR. leguminosarum showed possible tolerance when grown on salinized culture medium.


Chlorures Rhizobium Faba Bean Bean Plant Bacterial Colony 
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Influence de la forme ionique des sels minéraux sur la croissance de la fève faba et de Rhizobium leguminosarum


La nodulation et la croissance des plants de fève faba (Vicia faba cultivar ‘Giza 2’) agés de 2 mois ont été étudiés dans des essais en pots en utilisant un sol argileux alluvial (pH 7.9). On a ajouté les chlorures, carbonates et sulfates de Na+, K+ et Mg2+ à la dose de 20 mEq par 100 g de sol. On a testé ensuite la tolérance deRhizobium leguminosarum (biovar.viceae, souche F-15), cultivé en milieu de culture pure, salinée avec les mêmes sels. Les sels sont d'une manière générale inhibiteurs vis à vis de la plante et de la bactérie. Le nombre et les caractéristiques des nodules radiculaires de la plante, le poids sec des plantes (pousses aériennes et racines), le contenu azoté dans les plantes et le nombre de colonies bactériennes décroissent. Les chlorures sont le plus inhibiteurs dans le sol et les carbonates le sont dans le milieu de culture tandis que les sulfates sont le moins inhibiteurs dans les deux cas. Na+ est le plus inhibiteur, tandis que Mg2+ est le moins nocif. La formation de nodules effectifs sur les racines de plants cultivés dans le sol saliné est très pauvre, maisR. leguminosarum démontre une tolérance possible lorsqu'il est précultivé dans un milieu de culture saliné.


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Copyright information

© Oxford University Press 1989

Authors and Affiliations

  • M. M. El-Shinnawi
    • 1
  • Nafisa A. El-Saify
    • 1
  • Tayseer M. Waly
    • 1
  1. 1.Department of Soil Science and Department of Agricultural Botany, Faculty of AgricultureMenufiya UniversityShibin ElkomEgypt

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