The plastid genomes of nonphotosynthetic algae are not so small after all
Autor: | Aurora M. Nedelcu, David Roy Smith, Francisco Figueroa-Martinez, Adrian Reyes-Prieto |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
0301 basic medicine
biology Chlamydomonas Polytomella Polytoma plastid DNA biology.organism_classification Genome Noncoding DNA genome expansion 03 medical and health sciences 030104 developmental biology Algae Chloroplast DNA lcsh:Biology (General) Botany Plastid General Agricultural and Biological Sciences nonphotosynthetic lcsh:QH301-705.5 |
Zdroj: | Communicative & Integrative Biology, Vol 10, Iss 1 (2017) |
ISSN: | 1942-0889 |
Popis: | The thing about plastid genomes in nonphotosynthetic plants and algae is that they are usually very small and highly compact. This is not surprising: a heterotrophic existence means that genes for photosynthesis can be easily discarded. But the loss of photosynthesis cannot explain why the plastomes of heterotrophs are so often depauperate in noncoding DNA. If plastid genomes from photosynthetic taxa can span the gamut of compactness, why can't those of nonphotosynthetic species? Well, recently we showed that they can. The free-living, heterotrophic green alga Polytoma uvella has a plastid genome boasting more than 165 kilobases of noncoding DNA, making it the most bloated plastome yet found in a heterotroph. In this addendum to the primary study, we elaborate on why the P. uvella plastome is so inflated, discussing the potential impact of a free-living vs. parasitic lifestyle on plastid genome expansion in nonphotosynthetic lineages. |
Databáze: | OpenAIRE |
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