Institut für Molekulare Physiologie, Johannes Gutenberg-Universität Mainz, Mainz, Germany.
Institut für Organismische und Molekulare Evolutionsbiologie, Johannes Gutenberg-Universität Mainz, Mainz, Germany.
New Phytol. 2017 Jul;215(1):70-76. doi: 10.1111/nph.14567. Epub 2017 Apr 11.
The currently favoured model of the evolution of C photosynthesis relies heavily on the interpretation of the broad phenotypic range of naturally growing C -C intermediates as proxies for evolutionary intermediate steps. On the other hand, C -C intermediates had earlier been interpreted as hybrids or hybrid derivates. By first comparing experimentally generated with naturally growing C -C intermediates, and second summarising either direct or circumstantial evidence for hybridisation in lineages comprising C , C and C -C intermediates, we conclude that a possible hybrid origin of C -C intermediates deserves careful examination. While we acknowledge that the current model of C photosynthesis evolution is clearly the best available, C -C intermediates of hybrid origin, if existing, should not be used for further analysis of this model. However, experimental C × C hybrids potentially are excellent systems to analyse the genetic differences between C and C species and, also using segregating progeny, to study the relationship between individual photosynthetic traits and environmental factors.
目前，C 光合作用进化的主流模型主要依赖于对自然生长的 C₃-C₅ 中间型广泛表型范围的解释，将其作为进化中间步骤的代表。另一方面，C₃-C₅ 中间型早些时候被解释为杂种或杂种衍生物。我们首先比较了实验生成的与自然生长的 C₃-C₅ 中间型，其次总结了包含 C₃、C₄和 C₃-C₅ 中间型的谱系中杂交的直接或间接证据，我们得出结论，C₃-C₅ 中间型的可能杂种起源值得仔细研究。虽然我们承认目前的 C 光合作用进化模型显然是最好的，但如果存在杂种起源的 C₃-C₅ 中间型，则不应将其用于进一步分析该模型。然而，实验生成的 C₃-C₅ 杂种可能是分析 C₃ 和 C₅ 物种之间遗传差异的极好系统，并且还可以使用分离后代来研究单个光合作用特征与环境因素之间的关系。
