莱茵衣藻 y-1 突变体中叶绿素酸的光转化。
Photoconversion of Photochlorophyllide in the y-1 Mutant of Chlamydomonas reinhardtii.
机构信息
Department of Botany, University of Iowa, Iowa City, Iowa 52242.
出版信息
Plant Physiol. 1979 Jun;63(6):1102-6. doi: 10.1104/pp.63.6.1102.
Abstract
Dark-grown y-1 mutant cells of Chlamydomonas reinhardtii accumulate protochlorophyllide (Pchlide) in both 635 nanometers (P635) and 650 nanometers (P650) forms. Plastids in these cells lack the normal thylakoid membrane structure except some remnants of membrane vesicles. Using difference spectrophotometry, P635 is shown to be photoconverted to chlorophyllide at 672 nanometers (C672) and P650 is photoconverted to C688 followed by a rapid shift to C672 (Shibata shift) and regeneration of P650. Some of the Pchlide is not photoconverted despite repeated illumination. Although P650 is destroyed by freezing and thawing, it is not transformed into P635. Freezing and thawing treatment also made Pchlide no longer photoactive.
摘要
黑暗生长的莱茵衣藻 y-1 突变细胞在 635 纳米（P635）和 650 纳米（P650）处积累原叶绿素（Pchlide）。这些细胞中的质体缺乏正常的类囊体膜结构，只有一些膜泡的残余物。使用差示分光光度法，证明 P635 在 672 纳米（C672）处被光转化为叶绿素，P650 被光转化为 C688，随后迅速转移到 C672（Shibata 移位）并再生 P650。尽管反复照射，但仍有部分 Pchlide 未被光转化。尽管 P650 被冷冻和解冻破坏，但它不会转化为 P635。冷冻和解冻处理也使 Pchlide 不再具有光活性。
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