Plastome Evolution in Hemiparasitic Mistletoes

Genome Biology and Evolution
Gitte PetersenOle Seberg

Abstract

Santalales is an order of plants consisting almost entirely of parasites. Some, such as Osyris, are facultative root parasites whereas others, such as Viscum, are obligate stem parasitic mistletoes. Here, we report the complete plastome sequences of one species of Osyris and three species of Viscum, and we investigate the evolutionary aspects of structural changes and changes in gene content in relation to parasitism. Compared with typical angiosperms plastomes, the four Santalales plastomes are all reduced in size (10-22% compared with Vitis), and they have experienced rearrangements, mostly but not exclusively in the border areas of the inverted repeats. Additionally, a number of protein-coding genes (matK, infA, ccsA, rpl33, and all 11 ndh genes) as well as two transfer RNA genes (trnG-UCC and trnV-UAC) have been pseudogenized or completely lost. Most of the remaining plastid genes have a significantly changed selection pattern compared with other dicots, and the relaxed selection of photosynthesis genes is noteworthy. Although gene loss obviously reduces plastome size, intergenic regions were also shortened. As plastome modifications are generally most prominent in Viscum, they are most likely correlated with the increased ...Continue Reading

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Citations

Dec 17, 2015·The New Phytologist·Natalie Cusimano, Susann Wicke
Dec 3, 2015·Scientific Reports·G PetersenO Seberg
Jul 28, 2016·Proceedings of the National Academy of Sciences of the United States of America·Susann WickeGerald M Schneeweiss
Nov 4, 2016·Scientific Reports·Weishu FanJeffrey P Mower
Jul 22, 2017·The New Phytologist·Thomas W A BraukmannJohn V Freudenstein
Apr 3, 2019·Journal of Experimental Botany·Steffen GrebeEva-Mari Aro
Sep 1, 2018·Genome Biology and Evolution·Adam C SchneiderSaša Stefanovic
Apr 10, 2019·BMC Evolutionary Biology·Athanasios ZervasOle Seberg
Sep 21, 2018·Proceedings. Biological Sciences·Adam C SchneiderBruce G Baldwin
Oct 18, 2016·Mitochondrial DNA. Part B, Resources·Huei-Jiun Su, Jer-Ming Hu
Aug 19, 2021·PloS One·Huei-Jiun SuDaniel L Nickrent
Oct 30, 2021·The Plant Journal : for Cell and Molecular Biology·Lucie SchröderHans-Peter Braun

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Methods Mentioned

BETA
PCR

Software Mentioned

MUSCLE
Viscum
DOGMA
BLASTN
RAxML
tRNAscan
Geneious assembler
HyPhy
RELAX
REPuter

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