PJB-1972-19
MYCORRHIZAE IN THE PAKISTAN ERICALES
A. G. KHAN
Abstract
Ectendomycorrhizae of the
Pakistan Ericales viz., Rhododendron
lepidotum Wall, ex D.
Don., R. afghanicum Aitch.
& Herasl., Gaultheria trichophylla Royle., Cassiop
e fastigiata D. Don., Pyrola rotundifolia Michx.,
and Monotropa hypopitys L., were described. Microscopic examination showed typical
endophyte in and on the roots and its absence from
aerial or subaerial parts. This was supported by attempted isolation
experiments. Morphological and anatomical studies
suggest a series of increasing saprophytism and
its correlated characters from Ericaceae, through Pyrolaceae to
Monotropaceae. Endogone spores, responsible for the
formation of vesicular- arbuscular mycorrhiza in the majority of plants, were
extracted from heath rhizospheres, except that
of Monotropa hypopitys, but
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