| 生物土壤与生态 |
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| Effect of Photoperiod on Growth and Spore Generation of an Emericella quadriclineata Strain |
| ZHU Jian lan; ZHANG Zi he; CHANG Yong yi |
| 1.College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China; 2.The Key Open Laboratory of Grassland Agro-Ecosystems of Agricultural Ministry, Lanzhou University, Lanzhou 730020, China; 3.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China |
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Abstract The influence of photoperiod on the growth and spore generation of a strain of Emericella quadriclineata isolated from a cadaver of the mulberry looper, Apocheima cinerarius, was explored. Its hyphal growth was facilitated in liquid culture under long light, yielding significantly greater biomass than that under short light or in dark. The biomass peaked after 4-day incubation at the regime of Light:Dark 18∶6, an optimal photoperiod favoring spore generation on medium plates. At different temperature, sporulation capacity of the strain cultured under full light was much greater than that in full dark, peaked on day 7th at 25℃ under full light with a maximal increase rate being achieved on day 3rd to 5th. At 30℃ or 35℃, whether light or dark, the sporulation was quite poor. The effect of ultraviolet light on the growth of the strain increased with the decrease of exposure time.
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Received: 20 November 2006
Published: 20 January 2008
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2008, Vol. 28 
