Division of Biological Sciences, University of Missouri, Columbia, Missouri 65201.
Plant Physiol. 1974 Apr;53(4):589-95. doi: 10.1104/pp.53.4.589.
Three seedling lethal mutants of Zea mays with impaired photosynthesis are described. These recessive mutants were selected on the basis of high chlorophyll fluorescence. They have normal chlorophyll pigmentation but are unable to fix CO(2) fully. Evidence is presented from fluorescence characteristics of isolated chloroplasts that both photosystem I and II mutants were isolated. Using conventional measures of photosynthetic electron transport, we suggest that the photosystem I mutant has limited ability to reduce NADP. The other two mutants are clearly blocked in photosystem II, one possibly lacking the primary electron acceptor.
描述了三个玉米幼苗致死突变体，它们的光合作用受到损害。这些隐性突变体是根据高叶绿素荧光选择出来的。它们的叶绿素色素正常，但不能完全固定 CO(2)。从分离的叶绿体的荧光特性来看，有证据表明分离出了两个光系统 I 和 II 的突变体。使用传统的光合电子传递测量方法，我们认为光系统 I 突变体还原 NADP 的能力有限。另外两个突变体显然在光系统 II 中受阻，一个可能缺乏初始电子受体。
