Effect of forest fire on number, viability and post-fire re-establishment of arbuscular mycorrhizae |
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Authors: | A Rashid T Ahmed N Ayub A G Khan |
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Institution: | (1) Department of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan, PK;(2) Department of Biological Sciences, University of Western Sydney-Macarthur, P.O. Box 555, Campbelltown NSW 2560, Australia Fax: +46-203025; e-mail: a.khan@uws.edu.au, AU |
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Abstract: | Forest fire can affect arbuscular mycorrhizal (AM) fungi by changing the soil conditions and by directly altering AM proliferation.
We studied the effects of a severe forest fire at Margalla Hills near Islamabad on the number and viability of AM fungal propagules
in the burnt soil and their role in the re-establishment of post-fire infection in colonized plants. Compared with a nearby
control area, the burnt site had a similar number of total spores but a lower number of viable AM fungal propagules. The roots
of the two most frequent species at the burnt site, Dodonaea viscosa and Aristida adscensionis, showed a gradual increase in percentage root length colonized by AM fungi in general and hyphal infection in particular.
Our results indicate resumption of mycorrhizal activity following the fire, probably from AM hyphae in the roots of these
dominant shrubs.
Accepted: 18 July 1997 |
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Keywords: | Arbuscular mycorrhiza Forest fire Revegetation MPN |
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