Aramayo R, Adams T H, Timberlake W E
Department of Genetics, University of Georgia, Athens 30602.
Genetics. 1989 May;122(1):65-71. doi: 10.1093/genetics/122.1.65.
We investigated the functions of the highly expressed, sporulation-specific SpoC1 genes of Aspergillus nidulans by deleting the entire 38-kb SpoC1 gene cluster. The resultant mutant strain did not differ from the wild type in (1) growth rate, (2) morphology of specialized reproductive structures formed during completion of the asexual or sexual life cycles, (3) sporulation efficiency, (4) spore viability or (5) spore resistance to environmental stress. Thus, deletion of the SpoC1 gene cluster, representing 0.15% of the A. nidulans genome, had no readily detectable phenotypic effects. Implications of this result are discussed in the context of major alterations in gene expression that occur during A. nidulans development.
我们通过删除整个38 kb的SpoC1基因簇,研究了构巢曲霉中高度表达的、孢子形成特异性的SpoC1基因的功能。所得突变菌株在以下方面与野生型没有差异:(1)生长速率,(2)在无性或有性生活周期完成过程中形成的特殊生殖结构的形态,(3)孢子形成效率,(4)孢子活力或(5)孢子对环境压力的抗性。因此,代表构巢曲霉基因组0.15%的SpoC1基因簇的缺失没有产生易于检测到的表型效应。我们在构巢曲霉发育过程中发生的基因表达重大变化的背景下讨论了这一结果的意义。