Plant and Soil

, Volume 104, Issue 1, pp 45–51 | Cite as

Root-nodules formation byPenicillium sp. onAlnus glutinosa andAlnus incana

  • A. Capellano
  • B. Dequatre
  • G. Valla
  • A. Moiroud
Article

Abstract

A non identified species ofPenicillium induced the formation of nodules on the root system of two species of alder (Alnus glutinosa and A.incana). These so-called myconodules looked like young actinorhizae. Namely only some cortical cells of the young transformed root were invaded by the mycelium. Plasmalemma of the host-cell surrounded the hyphae when they penetrated in the cell, but then the fungus colonized all the cell, the contents of which degenerated. In spite of this necrophytic relationships the plant showed no evident damage after the infection.

Key words

alnus Frankia infection penicillium root-nodules 

Abbreviations

c

cytoplasma of the host-cell

D

electron-dense deposits

FL

vascular bundles

F

hyphae

M

myconodule

mc

cytoplasmic membrane of the hyphae

N

host-cell nucleus

p

hyphae cell wall

pl

host-cell plasmalemma

PC

host-cell wall

PO

septal pore of hyphae

R

mother-root bearing nodules

V

vesicles ofFrankia

W

Woronin bodies

ZC

cortical zone of nodule

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Copyright information

© Martinus Nijhoff Publishers 1987

Authors and Affiliations

  • A. Capellano
    • 1
  • B. Dequatre
    • 1
  • G. Valla
    • 1
  • A. Moiroud
    • 1
  1. 1.Ecologie Microbienne U.A. 697 et Centre de Microscopie Electronique Appliquée à la Biologie et GéologieUniversité Claude Bernard LYON 1Villeurbanne CedexFrance

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