Étude ultrastructurale des endomycorhizes à vésicules et arbuscules de jeunes plants d'Eucalyptus camaldulensis(Dehnardt) (Myrtacées)

Publisher Website
Google Scholar
Abstract
The authors studied the ultrastructural organisation of (va) mycorrhiza of young Eucalyptus camaldulensis plantules. This type of of mycorrhiza is characteristic of the juvenile stages of this woody species and is replaced in the old plants by ectomycorrhiza. The (va) mycorrhiza observed in the cortical cells of the Eucalytus root have the same basic structure as other known examples of this type of mycorrhiza and no differences were found which would explain their ephemeral presence in the roots of this plant. In the cells invaded by the endophyte, there is a very large increase in the amount of cytoplam which is very rich in mitochondria. The endoplasmic reticulum is well developed and its elements show frequent contacts with the host plasmalemma running along the interface. These may correspond to the transfer of the precursors of the isolating layer into the matrix.