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2008•Journal of Southwest China Normal UniversityRequires access

Biological Characteristics of Fusarium oxysporum Causing Rot Spot on Iris

Yi Long

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Abstract

Biological characteristics were studied on the pathogen(Fusarium oxysporum schl.)causing iris rot spot isolated from access area of the disease in Chongqing.It was found in the study the fungus grew well between 6℃and 36℃with the optimum temperature at 28℃.The pH for mycelia growth and spore production was from 3.10 to 11.80 with the optimum at pH 7.11.The conidia could germinate with the conditions under 5-35℃,pH 3-10 and RH 90%-100%,with the optimal at 24℃,pH 7 and RH 100%.The lethal temperature of conidia was for 10 min at 48℃.The light played less effect on the growth of mycelium,but fairly played a great role on the production of conidia.The pathogenic fungus could utilize well many sorts of carbon sources and nitrogen sources,respectively.

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What this paper is about

Biological characteristics were studied on the pathogen(Fusarium oxysporum schl.)causing iris rot spot isolated from access area of the disease in Chongqing.It was found in the study the fungus grew well between 6℃and 36℃with the optimum temperature at 28℃.The pH for mycelia growth and spore production was from 3.10 to 11.80 with the optimum at pH 7.11.The conidia could germinate with the conditions under 5-35℃,pH 3-10 and RH 90%-100%,with the optimal at 24℃,pH 7 and RH 100%.The lethal temperature of conidia was for 10 min at 48℃.The light played less effect on the growth of mycelium,but fairly played a great role on the production of conidia.The pathogenic fungus could utilize well many sorts of carbon sources and nitrogen sources,respectively.

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Available abstract

Biological characteristics were studied on the pathogen(Fusarium oxysporum schl.)causing iris rot spot isolated from access area of the disease in Chongqing.It was found in the study the fungus grew well between 6℃and 36℃with the optimum temperature at 28℃.The pH for mycelia growth and spore production was from 3.10 to 11.80 with the optimum at pH 7.11.The conidia could germinate with the conditions under 5-35℃,pH 3-10 and RH 90%-100%,with the optimal at 24℃,pH 7 and RH 100%.The lethal temperature of conidia was for 10 min at 48℃.The light played less effect on the growth of mycelium,but fairly played a great role on the production of conidia.The pathogenic fungus could utilize well many sorts of carbon sources and nitrogen sources,respectively.

Key concepts: Conidium, Mycelium, Fusarium oxysporum, Spore germination, Spore, Fungus, Pathogenic fungus, Germination

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