Suppression of Fusarium Colonization of Cotton Roots and Fusarium Wilt by Seed Treatments with Gliocladium virens and Bacillus subtilis

Autor:	Jiuxu Zhang, Charles R. Howell, J. L. Starr
Rok vydání:	1996
Předmět:	Fusarium Gliotoxin food and beverages Bacillus subtilis Biology biology.organism_classification Fusarium wilt chemistry.chemical_compound chemistry Insect Science Seed treatment Botany Fusarium oxysporum Meloidogyne incognita Colonization Agronomy and Crop Science
Zdroj:	Biocontrol Science and Technology. 6:175-188
ISSN:	1360-0478 0958-3157
DOI:	10.1080/09583159650039377
Popis:	In a growth chamber at 25 C, the fungal antagonist Gliocladium virens colonized tap roots and secondary roots of cotton in non-sterile soil after seed treatment with preparations of G. virens. Colonization of tap roots by G. virens increased over time, and decreased with root depth. Seed treatments with G. virens strains G-4 and G-6 and with Bacillus subtilis strains GB03 and GB07 reduced the colonization of tap roots and secondary roots of cotton seedlings by Fusarium spp. Under greenhouse conditions, the same seed treatments suppressed the incidence and severity of fusarium wilt of cotton in soil infested with Fusarium oxysporum f. sp. vasinfectum and Meloidogyne incognita. Gliotoxin, produced by 'Q-group' strains of G. virens, inhibited F. oxysporum f. sp. vasinfectum in vitro. The seed treatments with G. virens strain G-6 and B. subtilis strains GB03 and GB07 did not affect the reproduction of root-knot nematodes. The results of this study may help to explain why the treatment of cotton seed with bioc...
Databáze:	OpenAIRE
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