| CAPITAO, C., Sorin TANASA, Jaroslav FULNEČEK, Vivek Kumar RAXWAL, S. AKIMCHEVA, P. BULANKOVA, Pavlína MIKULKOVÁ, Lucie CRHÁK KHAITOVÁ, M. KALIDASS, I. LERMONTOVA, M. SCHEIDID a Karel ŘÍHA. A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis. PLoS Genetics. San Francisco: Public Library of Science, 2021, roč. 17, č. 9, s. „e1009779“, 26 s. ISSN 1553-7404. Dostupné z: https://dx.doi.org/10.1371/journal.pgen.1009779. |
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@article{1840457,
author = {Capitao, C. and Tanasa, Sorin and Fulneček, Jaroslav and Raxwal, Vivek Kumar and Akimcheva, S. and Bulankova, P. and Mikulková, Pavlína and Crhák Khaitová, Lucie and Kalidass, M. and Lermontova, I. and Scheidid, M. and Říha, Karel},
article_location = {San Francisco},
article_number = {9},
doi = {http://dx.doi.org/10.1371/journal.pgen.1009779},
keywords = {CHROMOSOME SEGREGATION; MITOTIC EXIT; MEIOSIS-I; GENE; PROGRESSION; HOMOLOG; SMG7; SPOROGENESIS; INITIATION; EVOLUTION},
language = {eng},
issn = {1553-7404},
journal = {PLoS Genetics},
title = {A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis},
url = {https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009779},
volume = {17},
year = {2021}
}
TY - JOUR
ID - 1840457
AU - Capitao, C. - Tanasa, Sorin - Fulneček, Jaroslav - Raxwal, Vivek Kumar - Akimcheva, S. - Bulankova, P. - Mikulková, Pavlína - Crhák Khaitová, Lucie - Kalidass, M. - Lermontova, I. - Scheidid, M. - Říha, Karel
PY - 2021
TI - A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis
JF - PLoS Genetics
VL - 17
IS - 9
SP - „e1009779“
EP - „e1009779“
PB - Public Library of Science
SN - 15537404
KW - CHROMOSOME SEGREGATION
KW - MITOTIC EXIT
KW - MEIOSIS-I
KW - GENE
KW - PROGRESSION
KW - HOMOLOG
KW - SMG7
KW - SPOROGENESIS
KW - INITIATION
KW - EVOLUTION
UR - https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1009779
N2 - 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.
ER -
CAPITAO, C., Sorin TANASA, Jaroslav FULNEČEK, Vivek Kumar RAXWAL, S. AKIMCHEVA, P. BULANKOVA, Pavlína MIKULKOVÁ, Lucie CRHÁK KHAITOVÁ, M. KALIDASS, I. LERMONTOVA, M. SCHEIDID a Karel ŘÍHA. A CENH3 mutation promotes meiotic exit and restores fertility in SMG7-deficient Arabidopsis. \textit{PLoS Genetics}. San Francisco: Public Library of Science, 2021, roč.~17, č.~9, s.~„e1009779“, 26 s. ISSN~1553-7404. Dostupné z: https://dx.doi.org/10.1371/journal.pgen.1009779.
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