they are Trichoderma harzianum T 969, T. harzianum
T 447, Trichoderma hamatum T 614, Trichoderma roseum T678, Gliocladium virens G525 and the
unknown Trichoderma species isolate (Trichoderma sp. T) obtained from the soil of Moghan Area,
Ardabil Province of Iran. The culture filtrates reduced the speed of seed germination, but no influence
(p0.05) was recorded at the final rate of the seed germination. When maize seeds were exposed to the
Trichoderma spore suspension, all the Trichoderma isolates colonized the seed surface and inhibited
the seed germination. The maize seed potted in inoculated soil did not emerge from the soil among all
tested Trichoderma isolates, except for non-inoculated soil 30 days after potting. When Trichoderma
conidia were added on the surface of soil near the emerged seed, significant (p0.01) decrease of
seedling treated separately with T. hamatum T614 isolate was observed on the leaves area, fresh root
and shoot weight, compared to the non-inoculated seedling. Whereas T. hamatum T447 and T.
harzianum T969 reduced markedly (p0.01), seedling fresh root weight and fresh shoot weight were
respectively increased as compared to the control. Trichoderma isolates had no influence on
chlorophyll content in leaves and root length as well as stomata conductivity, except for Trichoderma
spp. isolate T that increased stomata conductivity of seedling significantly (p0.01).
they are Trichoderma harzianum T 969, T. harzianumT 447, Trichoderma hamatum T 614, Trichoderma roseum T678, Gliocladium virens G525 and theunknown Trichoderma species isolate (Trichoderma sp. T) obtained from the soil of Moghan Area,Ardabil Province of Iran. The culture filtrates reduced the speed of seed germination, but no influence(p0.05) was recorded at the final rate of the seed germination. When maize seeds were exposed to theTrichoderma spore suspension, all the Trichoderma isolates colonized the seed surface and inhibitedthe seed germination. The maize seed potted in inoculated soil did not emerge from the soil among alltested Trichoderma isolates, except for non-inoculated soil 30 days after potting. When Trichodermaconidia were added on the surface of soil near the emerged seed, significant (p0.01) decrease ofseedling treated separately with T. hamatum T614 isolate was observed on the leaves area, fresh rootand shoot weight, compared to the non-inoculated seedling. Whereas T. hamatum T447 and T.harzianum T969 reduced markedly (p0.01), seedling fresh root weight and fresh shoot weight wererespectively increased as compared to the control. Trichoderma isolates had no influence onchlorophyll content in leaves and root length as well as stomata conductivity, except for Trichodermaspp. isolate T that increased stomata conductivity of seedling significantly (p0.01).
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