Proline and leghaemoglobin contents and water absorption capability of cowpea roots as influenced by infection with Rotylenchus reniformis, Meloidogyne incognita and Rhizoctonia solani

T. A. Khan, S. I. Husain


Rhizoctonia solani caused a greater accumulation of proline content than either Meloidogyne incognita or Rotylenchulus reni/ormis. However, all three pathogens, when present together caused the greatest accumulation. Proline content in the infected plants was higher in roots than in leaves. R. solani caused greater reduction of leghaemoglobin content in the nodular tissues than either M. incognita or R. reni/ormis but the presence of all three pathogens caused maximum reduction. Water absorbing capacity of roots was also significantly hampered by pathogenic infections.

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