Advertisement

Topics

The architecture of intra-organism mutation rate variation in plants.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "The architecture of intra-organism mutation rate variation in plants."

Given the disposability of somatic tissue, selection can favor a higher mutation rate in the early segregating soma than in germline, as seen in some animals. Although in plants intra-organismic mutation rate heterogeneity is poorly resolved, the same selectionist logic can predict a lower rate in shoot than in root and in longer-lived terminal tissues (e.g., leaves) than in ontogenetically similar short-lived ones (e.g., petals), and that mutation rate heterogeneity should be deterministic with no significant differences between biological replicates. To address these expectations, we sequenced 754 genomes from various tissues of eight plant species. Consistent with a selectionist model, the rate of mutation accumulation per unit time in shoot apical meristem is lower than that in root apical tissues in perennials, in which a high proportion of mutations in shoots are themselves transmissible, but not in annuals, in which somatic mutations tend not to be transmissible. Similarly, the number of mutations accumulated in leaves is commonly lower than that within a petal of the same plant, and there is no more heterogeneity in accumulation rates between replicate branches than expected by chance. High mutation accumulation in runners of strawberry is, we argue, the exception that proves the rule, as mutation transmission patterns indicate that runner has a restricted germline. However, we also find that in vitro callus tissue has a higher mutation rate (per unit time) than the wild-grown comparator, suggesting nonadaptive mutational "fragility". As mutational fragility does not obviously explain why the shoot-root difference varies with plant longevity, we conclude that some mutation rate variation between tissues is consistent with selectionist theory but that a mechanistic null of mutational fragility should be considered.

Affiliation

Journal Details

This article was published in the following journal.

Name: PLoS biology
ISSN: 1545-7885
Pages: e3000191

Links

DeepDyve research library

PubMed Articles [17327 Associated PubMed Articles listed on BioPortfolio]

Mutation Rates: Simpler Than We Thought?

Mutation rate variation is often explained by varying optimal rates, or through effective population sizes determining the effectiveness of selection. But a rate difference between humans and owl monk...

Significant Strain Variation in the Mutation Spectra of Inbred Laboratory Mice.

Mutation provides the ultimate source of all new alleles in populations, including variants that cause disease and fuel adaptation. Recent whole genome sequencing studies have uncovered variation in t...

Signals of variation in human mutation rate at multiple levels of sequence context.

Our understanding of the human mutation rate helps us build evolutionary models and interpret patterns of genetic variation observed in human populations. Recent work indicates that the frequencies of...

Inductive determination of allele frequency spectrum probabilities in structured populations.

We present a method for inductively determining exact allele frequency spectrum (AFS) probabilities for samples derived from a population comprising two demes under the infinite-allele model of mutati...

Variation of gene expression in plants is influenced by gene architecture and structural properties of promoters.

In higher eukaryotes, gene architecture and structural properties of promoters have emerged as significant factors influencing variation in number of transcripts (expression level) and specificity of ...

Clinical Trials [5534 Associated Clinical Trials listed on BioPortfolio]

Predictive Variables of the Hemodynamic Effect During the Laparoscopic Surgery in Children

This prospective observational study aimed to identify the intraoperative variables to predict the hemodynamic change according to intra-abdominal pressure in the children undergoing lapar...

Potentially Avoidable Hospitalisation in France

Potentially Avoidable Hospitalizations (Pah) Are Studied As An Indirect Measure Of Access To Primary Care And Of The Interface Between Primary And Secondary Care. A Previous Work Unveils C...

Transcranial Magnetic Stimulation Study of Cortical Excitability as Marker of Antidepressant Response: EXCIPSY Study

Depression is a common issue but there is no marker of response to an antidepressant treatment.The measurement of variation of the cortical excitability in responders to a selective seroto...

Evaluation of Circadian Variation of EEG Using BIS Monitor in ICU Patients

The investigators propose to evaluate circadian variation of EEG using BIS (bispectral index) monitor in ICU patients in three different groups: non-sedated, only sedated and sedated and c...

A Phase 1 Bioequivalence Study of a Test Tablet Formulation of Ravidasvir With the Reference Tablet Formulation of Ravidasvir Study

In a phase 1, open-label, crossover study to evaluate the relative bioavailability of a tablet formulation of ravidasvir (test) versus the capsule formulation of ravidasvir (reference) in ...

Medical and Biotech [MESH] Definitions

The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).

Peculiarities associated with the internal structure, form, topology, or architecture of organisms that distinguishes them from others of the same species or group.

The art and science of designing buildings and structures. More generally, it is the design of the total built environment, including town planning, urban design, and landscape architecture.

Works consisting of drawings of architecture and architectural projects, whether the project was executed or not. (Art & Architecture Thesaurus, 1990, v.2)

A copy number variation that results in reduced GENE DOSAGE due to any loss-of-function mutation. The loss of heterozygosity is associated with abnormal phenotypes or diseased states because the remaining gene is insufficient.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Biological Therapy
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...


Searches Linking to this Article