Phytochrome evolution in 3D: deletion, duplication, and diversification.
New Phytol
; 225(6): 2283-2300, 2020 03.
Article
en En
| MEDLINE
| ID: mdl-31595505
ABSTRACT
Canonical plant phytochromes are master regulators of photomorphogenesis and the shade avoidance response. They are also part of a widespread superfamily of photoreceptors with diverse spectral and biochemical properties. Plant phytochromes belong to a clade including other phytochromes from glaucophyte, prasinophyte, and streptophyte algae (all members of the Archaeplastida) and those from cryptophyte algae. This is consistent with recent analyses supporting the existence of an AC (Archaeplastida + Cryptista) clade. AC phytochromes have been proposed to arise from ancestral cyanobacterial genes via endosymbiotic gene transfer (EGT), but most recent studies instead support multiple horizontal gene transfer (HGT) events to generate extant eukaryotic phytochromes. In principle, this scenario would be compared to the emerging understanding of early events in eukaryotic evolution to generate a coherent picture. Unfortunately, there is currently a major discrepancy between the evolution of phytochromes and the evolution of eukaryotes; phytochrome evolution is thus not a solved problem. We therefore examine phytochrome evolution in a broader context. Within this context, we can identify three important themes in phytochrome evolution deletion, duplication, and diversification. These themes drive phytochrome evolution as organisms evolve in response to environmental challenges.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Filogenia
/
Fitocromo
/
Plantas
/
Cianobacterias
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Genes de Plantas
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Fenómenos Fisiológicos de las Plantas
/
Evolución Biológica
Idioma:
En
Revista:
New Phytol
Asunto de la revista:
BOTANICA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Estados Unidos