光敏色素介导的非常敏感的卵孢子的萌发。
Phytochrome-mediated germination of very sensitive oospores.
机构信息
Department of Biological Sciences, University at Albany, State University of New York, Albany, New York 12222.
出版信息
Plant Physiol. 1992 Nov;100(3):1132-6. doi: 10.1104/pp.100.3.1132.
The light receptor and its mode of operation were studied in photosensitive oospores of Nitella furcata subsp. megacarpa (Allen emend. Wood). Brief pulses of light activated maximal germination of post-secondary dormant oospores removed from lake sediments. Fluence response data at 12 wavelengths were used to construct an action spectrum for germination. The shape of the action spectrum with its maximum at 669 nm provides evidence for the involvement of phytochrome. Germination was induced with photon fluences that established as little as 0.01% of the phytochrome in the far red-absorbing form, which suggests that phytochrome was operating in the very low-fluence response mode. The functioning of phytochrome in the very low-fluence response mode in Nitella is similar to that in higher plants.
光受体及其工作模式在大型枝角藻（艾伦增订。伍德）的光敏休眠孢子中进行了研究。短暂的光脉冲激活了从湖底沉积物中取出的次级休眠孢子的最大发芽。在 12 个波长下的通量响应数据用于构建发芽的作用光谱。作用光谱的形状在 669nm 处达到最大值，为光敏素的参与提供了证据。用光子通量诱导发芽，仅使远红光吸收形式的光敏素达到 0.01%，这表明光敏素以极低的通量响应模式运行。在枝角藻中，光敏素以极低的通量响应模式运行的功能类似于高等植物。
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