کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2827001 1162314 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Why are plastid genomes retained in non-photosynthetic organisms?
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
Why are plastid genomes retained in non-photosynthetic organisms?
چکیده انگلیسی

The evolution of the plastid from a photosynthetic bacterial endosymbiont involved a dramatic reduction in the complexity of the plastid genome, with many genes either discarded or transferred to the nucleus of the eukaryotic host. However, this evolutionary process has not gone to completion and a subset of genes remains in all plastids examined to date. The various hypotheses put forward to explain the retention of the plastid genome have tended to focus on the need for photosynthetic organisms to retain a genetic system in the chloroplast, and they fail to explain why heterotrophic plants and algae, and the apicomplexan parasites all retain a genome in their non-photosynthetic plastids. Here we consider two additional explanations: the ‘essential tRNAs’ hypothesis and the ‘transfer-window’ hypothesis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 11, Issue 2, February 2006, Pages 101–108
نویسندگان
, , ,