A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F21%3A00124389" target="_blank" >RIV/00216224:14740/21:00124389 - isvavai.cz</a>
Result on the web
<a href="https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009779" target="_blank" >https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009779</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1371/journal.pgen.1009779" target="_blank" >10.1371/journal.pgen.1009779</a>
Alternative languages
Result language
angličtina
Original language name
A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis
Original language description
Meiosis in angiosperm plants is followed by mitotic divisions to form multicellular haploid gametophytes. Termination of meiosis and transition to gametophytic development is, in Arabidopsis, governed by a dedicated mechanism that involves SMG7 and TDM1 proteins. Mutants carrying the smg7-6 allele are semi-fertile due to reduced pollen production. We found that instead of forming tetrads, smg7-6 pollen mother cells undergo multiple rounds of chromosome condensation and spindle assembly at the end of meiosis, resembling aberrant attempts to undergo additional meiotic divisions. A suppressor screen uncovered a mutation in centromeric histone H3 (CENH3) that increased fertility and promoted meiotic exit in smg7-6 plants. The mutation led to inefficient splicing of the CENH3 mRNA and a substantial decrease of CENH3, resulting in smaller centromeres. The reduced level of CENH3 delayed formation of the mitotic spindle but did not have an apparent effect on plant growth and development. We suggest that impaired spindle re-assembly at the end of meiosis limits aberrant divisions in smg7-6 plants and promotes formation of tetrads and viable pollen. Furthermore, the mutant with reduced level of CENH3 was very inefficient haploid inducer indicating that differences in centromere size is not the key determinant of centromere-mediated genome elimination.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10603 - Genetics and heredity (medical genetics to be 3)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PLoS Genetics
ISSN
1553-7404
e-ISSN
1553-7390
Volume of the periodical
17
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
26
Pages from-to
„e1009779“
UT code for WoS article
000757101300002
EID of the result in the Scopus database
2-s2.0-85116890494