Studies of Two Seed-Borne Fungi of Some Malaysian Forest Tree Species
Twenty-six species of saprophytic fungi and ten species of potentially pathogenic fungi were isolated from seeds of five indigenous and three introduced forest tree species. Isolation of the fungi using both the blotter and the agar plate methods was carried out to ensure the isolation of as ma...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1981
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9840/1/FH_1981_2_A.pdf |
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| Summary: | Twenty-six species of saprophytic fungi and ten
species of potentially pathogenic fungi were isolated from
seeds of five indigenous and three introduced forest tree species.
Isolation of the fungi using both the blotter and the agar
plate methods was carried out to ensure the isolation of as
many species as possible from each seed sample. Six new
species of fungi not previously recorded in Malaysia were
discovered. They were Beltraniella nilgrica Pirozynski &
Patil, Chaetomium trilaterale Chivers, Cylindrocladium
scoparium Morgan, Cryptodiaporthe sp., Gliocephalo
trichum
simplex (J. Meyer) Wiley & Simmons and Gliocladium sp.
Various factors affecting the growth of two fungi -
Cylindrocladium scoparium Morgan, a new species recorded in
Malaysia which is Fotentially pathogenic, and Pestalotiopsis
versicol or (Speg.) Steyaert, one of the most commonly
occurring saprophytes - were investigated. These factors were
the effect of nutrients, light, temperature, pH and various
vitamins. Suitable culture conditions were developed for both
fungi. Seedling inoculation tests showed that Cylindrocladium
scoparium was pathogenic to seedlings of Dipterocarpus grandiflorus
Blanco, a species indigenous to Malaysian forests, and Pinus
caribaea Mor., a species of tropical pine introduced into and
pl anted in this country. An investigation into some of the
enzymes produced by the two fungi was also carried out to obtain
a better understanding of the roles of C. scoparium and
P. versicolor in seed deterioration and pathogenicity. |
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