在 Neurospora crassa 中，类胡萝卜素生物合成的光诱导作用的 260 至 800 纳米之间的作用光谱。
Action Spectrum between 260 and 800 Nanometers for the Photoinduction of Carotenoid Biosynthesis in Neurospora crassa.
机构信息
Radiation Biology Laboratory, Smithsonian Institution, Rockville, Maryland 20852.
出版信息
Plant Physiol. 1976 Mar;57(3):440-5. doi: 10.1104/pp.57.3.440.
Abstract
An action spectrum for light-induced carotenoid biosynthesis in Neurospora crassa was determined in 4 to 20 nm steps from 260 to 800 nm. Four-day, dark-grown mycelial pads of N. crassa were exposed to varying amounts of monochromatic radiant energy and time. After a 48-hour incubation period at 6 C, carotenoid content was assayed spectrophotometrically in vivo. The action spectrum has maxima at 450 and 481 nm in the visible range and at 280 and 370 nm in the ultraviolet. A pigment synthesized by Neurospora whose absorption spectrum resembles the action spectrum is beta-carotene.A model for the regulation of carotenoid biosynthesis in N. crassa is proposed which describes a mechanism by which beta-carotene could act as a photoregulator. This carotenoid is suggested to be both photoreceptor for and regulator of carotenoid biosynthesis.
摘要
从 260nm 到 800nm，我们以 4nm 到 20nm 的步长，在链孢霉中确定了光诱导类胡萝卜素生物合成的作用光谱。将处于黑暗中生长了 4 天的链孢霉菌丝垫暴露于不同量的单色辐射能和时间下。在 6°C 下孵育 48 小时后，通过分光光度法在体内测定类胡萝卜素含量。作用光谱在可见光谱中有最大值，分别为 450nm 和 481nm，在紫外线光谱中有最大值，分别为 280nm 和 370nm。一种由链孢霉合成的色素，其吸收光谱类似于作用光谱，为β-胡萝卜素。我们提出了一个用于调节链孢霉中类胡萝卜素生物合成的模型，该模型描述了一种β-胡萝卜素可以作为光调节剂的机制。这种类胡萝卜素被认为是类胡萝卜素生物合成的光受体和调节剂。
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The Effect of Temperature on Photo-induced Carotenoid Biosynthesis in Neurospora crassa.温度对粗糙脉孢菌光诱导类胡萝卜素生物合成的影响
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