Putting the C in phycology
Putting the C in phycology
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DOI：
10.1080/09670269710001737259
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发表时间：
1997-11
影响因子：
2.4
通讯作者：
J. Raven
中科院分区：
文献类型：
--
作者：
J. Raven
本文认为分子生物学的全球环境工作的无机碳获取过程中的藻类广义（即包括蓝藻）。至少95%的有机碳在藻类中已经被RUBISCO固定，而剩余的5%左右涉及一系列回补羧化酶。RUBISCO的催化特性表现出很大的系统发育变异;对于一些藻类RUBISCO（那些从蓝藻，可能，甲藻）的羧化酶和加氧酶活性的动力学是这样的净光合作用CO2固定不能发生扩散CO2进入空气平衡溶液。在许多其他藻类中，无机C同化的动力学与体外RUBISCO动力学不同，并且，如在蓝藻和甲藻中，假设CO2浓缩机制。在许多情况下，这种机制的运作可以被证明是在光合作用过程中比外部更高的内部CO2水平。在这样的情况下，...
This article considers molecular biological to global environment work on inorganic carbon acquisition processes in the algae sensu lato (i.e. including the cyanobacteria). At least 95% of the organic C in photolithotrophic algae has been fixed by RUBISCO, while the remaining 5% or so has involved a range of anaplerotic carboxylases. The catalytic characteristics of RUBISCO show substantial phylogenetic variation; for some algal RUBISCOs (those from cyanobacteria and, possibly, Dinophyta) the kinetics of the carboxylase and oxygenase activity are such that net photosynthetic CO2 fixation could not occur with diffusive CO2 entry from air-equilibrium solution. In many other algae the kinetics of inorganic C assimilation are at variance with in vitro RUBISCO kinetics, and, as in cyanobacteria and Dinophyta, a CO2-concentrating mechanism is hypothesized. In many cases, the operation of such a mechanism can be demonstrated as a higher internal than external CO2 level during photosynthesis. In cases where such ...