What are the genomic consequences for plastids in a mixotrophic orchid (Epipactis helleborine)?
| Autor: | Janice Valencia-D, Kurt M. Neubig, W. Mark Whitten |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ecology Epipactis helleborine fungi Carbon uptake food and beverages Plant Science Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences DNA sequencing Chloroplast 03 medical and health sciences 030104 developmental biology Chloroplast DNA Botany Plastid Ecology Evolution Behavior and Systematics Mixotroph |
| Zdroj: | Botany. 99:239-249 |
| ISSN: | 1916-2804 1916-2790 |
| DOI: | 10.1139/cjb-2020-0054 |
| Popis: | The chloroplast (plastid) controls carbon uptake, so its DNA sequence and function are highly conserved throughout the land plants. But, for those that have alternative carbon supplies, the plastid genome is susceptible to mutations in the photosynthetic genes and overall size reduction. Fully mycoheterotrophic plants receive organic carbon from their fungal partner, do not photosynthesize, and also do not exhibit green coloration (or produce substantial quantities of chlorophyll). Epipactis helleborine (L.) Crantz exhibits all trophic modes from autotrophy to full mycoheterotrophy. Albinism is a stable condition in individuals of this species and does not prevent them from producing flowers and fruit. Here we assemble and compare the plastid genome of green and albino individuals. Our results show that there is still strong selective pressure in the plastid genome. Therefore, the few punctual differences among them, to our knowledge, do not affect any normal photosynthetic capability in the albino plant. These findings suggest that mutations or other genetically controlled processes in other genomes, or environmental conditions, are responsible for the phenotype. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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