Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Sevilla, Spain.
Planta. 1980 Jan;150(2):134-9. doi: 10.1007/BF00582356.
The effect of light on carotene accumulation was studied by analyzing the β-carotene content of 4-α-old mycelia continuously exposed to illumination of different intensities. The wild-type, mutants defective in phototropism, mutants defective in carotene regulation, and newpic mutants specifically defective for photocarotenogenesis were examined. The results indicate that photocarotenogenesis depends on a single sensory pathway which shares its earlier steps (governed by genesmadA andmadB) with the sensory pathway for phototropism. It shares its later steps (probably governed by genescarA andpicB) with one of the pathways for carotene regulation, and includes at least one specific step (governed by genepicA) not known to be involved in other responses.
研究了不同光照强度对胡萝卜素积累的影响，方法是连续分析 4-α 龄菌丝体的β-胡萝卜素含量。野生型、向光性缺陷突变体、胡萝卜素调控缺陷突变体以及专门缺乏光色氨酸生成的新pic 突变体都进行了检测。结果表明，光色氨酸生成取决于单一的感应途径，该途径与向光性的感应途径具有相同的早期步骤（由 genesmadA 和 madB 控制）。它与胡萝卜素调控的途径之一具有相同的后期步骤（可能由 genescarA 和 picB 控制），并且至少包括一个特定步骤（由 genepicA 控制），该步骤与其他反应无关。
