Influence of <SUP>12</SUP>C<SUP>6+</SUP> ion irradiation on mutant avermitilis

WANG Shu-Yang; CHEN Ji-Hong; LI Wen-Jian; LIANG Jian-Ping; BO Yong-Heng; MA Xiao-Qi; LIU Jing

doi:10.1088/1674-1137/36/11/019

Chinese Physics C> 2012, Vol. 36> Issue(11) : 1140-1144 DOI: 10.1088/1674-1137/36/11/019

Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis

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Abstract：
The effects of ¹²C⁺⁶ ion irradiation on colony morphology and mycelia morphology, as well as on mutation rate have been studied in the B1a high-product strains (ZJAV-Y1-203) mutated by heavy ion irradiation and compared with that in the original strain (ZJAV-A-1). After irradiating the rate of a straw hat colony type having a high ability of producing B1a in ZJAV-Y1-203 strains was higher than that found in ZJAV-A-1 strains. When strains were cultured in a liquid medium for 24 hours, the mycelium becoming thinner could be observed in all of the irradiated ZJAV- Y1-203 groups, but only in the ZJAV-A-1 groups irradiated at the dose of 50 Gy or more. The early growth of mycelium was inhibited in the ZJAV- Y1-203 group irradiated with a high dose. The highest positive mutation rate (23.5%) of ZJAV - Y1 - 203 was reached at the lower dose of 30 Gy while the highest positive mutation rate of 34.2% in ZJAV-A-1 appeared at 50 Gy.
These results indicate that the effects of heavy ion irradiation still exist even in the mutated Streptomyces avermitilis, and only the dose is lower and the effects not so strong compared with the one that is first irradiated with optimized heavy ion doses. This is evidence of the one directional mutation being controlled by many more factors in a organism.

References

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WANG Shu-Yang, CHEN Ji-Hong, LI Wen-Jian, LIANG Jian-Ping, BO Yong-Heng, MA Xiao-Qi and LIU Jing. Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis[J]. Chinese Physics C, 2012, 36(11): 1140-1144. doi: 10.1088/1674-1137/36/11/019

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Received: 2011-09-20
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis

Corresponding author: CHEN Ji-Hong,

Corresponding author: LI Wen-Jian,

Received Date: 2011-09-20

Accepted Date: 1900-01-01

Available Online: 2012-11-05

Abstract: The effects of ¹²C⁺⁶ ion irradiation on colony morphology and mycelia morphology, as well as on mutation rate have been studied in the B1a high-product strains (ZJAV-Y1-203) mutated by heavy ion irradiation and compared with that in the original strain (ZJAV-A-1). After irradiating the rate of a straw hat colony type having a high ability of producing B1a in ZJAV-Y1-203 strains was higher than that found in ZJAV-A-1 strains. When strains were cultured in a liquid medium for 24 hours, the mycelium becoming thinner could be observed in all of the irradiated ZJAV- Y1-203 groups, but only in the ZJAV-A-1 groups irradiated at the dose of 50 Gy or more. The early growth of mycelium was inhibited in the ZJAV- Y1-203 group irradiated with a high dose. The highest positive mutation rate (23.5%) of ZJAV - Y1 - 203 was reached at the lower dose of 30 Gy while the highest positive mutation rate of 34.2% in ZJAV-A-1 appeared at 50 Gy.
These results indicate that the effects of heavy ion irradiation still exist even in the mutated Streptomyces avermitilis, and only the dose is lower and the effects not so strong compared with the one that is first irradiated with optimized heavy ion doses. This is evidence of the one directional mutation being controlled by many more factors in a organism.

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Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis

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Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis

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Influence of 12C6+ ion irradiation on mutant avermitilis

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Influence of 12C6+ ion irradiation on mutant avermitilis

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Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis

Influence of ¹²C⁶⁺ ion irradiation on mutant avermitilis