State of Mycorrhizae in some ornamenta gymnospermous tree species of Pakistan
State of Mycorrhizae in some ornamenta gymnospermous tree species of Pakistan
S. H. Iqbal, Shahbaz and Ghazala Nasim
ABSTRACT
Multiple mycorrhizal infections were found in
association with root systems scale leaves, decaying
micro sporophylls and epidermal tissues of Abies
pindrow, Auracaria cunnighamii, Cycas circinalis, C.
revoluta, Cupresses torulosa, Ephedra gerardiana, E.
regeliana, Juniperus communis, Pinus helepensis, P.
roxburghii, Podocarpus chinensis, Taxodium mucronatum,
Thuja orientalis and Zamia floridana. Endomycorrhizae
were prevalent in species of most families including
Pinaceae which normally forms the ectomycorrhiza. Fungal
hyphae colonized the young roots and formed coils,
arbuscules and vesicles inside the cortical cells.
Coiled and linear hyphae were very common, digestion
stages were observed. Extrametrical mycelium was also
found. Some endophytes other then VA, with septate,
hyaline or coloured mycelium were found penetrating into
the root. A mixture of endogonaceous spores formed the
rhizosphere mycoflora.
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September 1990
Vol. 40, Iss. 3
