The smallest angiosperm genomes may be the price for effective traps of bladderworts

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F24%3A00604557" target="_blank" >RIV/67985939:_____/24:00604557 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/24:00139685

Result on the web

<a href="https://doi.org/10.1093/aob/mcae107" target="_blank" >https://doi.org/10.1093/aob/mcae107</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/aob/mcae107" target="_blank" >10.1093/aob/mcae107</a>

Result language

angličtina

Original language name

The smallest angiosperm genomes may be the price for effective traps of bladderworts

Original language description

Background Species of the carnivorous family Lentibulariaceae exhibit the smallest genomes in flowering plants. We explored the hypothesis that their minute genomes result from the unique mitochondrial cytochrome c oxidase (COX) mutation. The mutation may boost mitochondrial efficiency, which is especially useful for suction-bladder traps of Utricularia, but also increase DNA-damaging reactive oxygen species, leading to genome shrinkage through deletion-biased DNA repair. We aimed to explore the impact of this mutation on genome size, providing insights into genetic mutation roles in plant genome evolution under environmental pressures.Methods We compiled and measured genome and mean chromosome sizes for 127 and 67 species, respectively, representing all three genera (Genlisea, Pinguicula and Utricularia) of Lentibulariaceae. We also isolated and analysed COX sequences to detect the mutation. Through phylogenetic regressions and Ornstein-Uhlenbeck models of trait evolution, we assessed the impact of the COX mutation on the genome and chromosome sizes across the family.Results Our findings reveal significant correlations between the COX mutation and smaller genome and chromosome sizes. Specifically, species carrying the ancestral COX sequence exhibited larger genomes and chromosomes than those with the novel mutation. This evidence supports the notion that the COX mutation contributes to genome downsizing, with statistical analyses confirming a directional evolution towards smaller genomes in species harbouring these mutations.Conclusions Our study confirms that the COX mutation in Lentibulariaceae is associated with genome downsizing, probably driven by increased reactive oxygen species production and subsequent DNA damage requiring deletion-biased repair mechanisms. While boosting mitochondrial energy output, this genetic mutation compromises genome integrity and may potentially affect recombination rates, illustrating a complex trade-off between evolutionary advantages and disadvantages. Our results highlight the intricate processes by which genetic mutations and environmental pressures shape genome size evolution in carnivorous plants.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GA24-11400S" target="_blank" >GA24-11400S: Causes and consequences of the recombination rate evolution in eukaryotic lineages differing in chromosome type</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Annals of Botany

ISSN

0305-7364

e-ISSN

1095-8290

Volume of the periodical

134

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

1131-1138

UT code for WoS article

001277816600001

EID of the result in the Scopus database

2-s2.0-85214320409