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@article{2253727,
author = {Přikrylová, Klára and Kilar, Agata Magdalena and Kováčiková, Petra and Fajkus, Jiří and Sýkorová, Eva and Fojtová, Miloslava},
article_number = {December},
doi = {http://dx.doi.org/10.1016/j.plantsci.2022.111453},
keywords = {ARM; Arabidopsis thaliana; Armadillo; ?-catenin-like repeat; RNAseq; Stress response; Telomerase},
language = {eng},
issn = {0168-9452},
journal = {Plant Science},
title = {Compromised function of ARM, the interactor of Arabidopsis telomerase, suggests its role in stress responses},
url = {https://www.sciencedirect.com/science/article/pii/S0168945222002783?via%3Dihub},
volume = {325},
year = {2022}
}
TY - JOUR
ID - 2253727
AU - Přikrylová, Klára - Kilar, Agata Magdalena - Kováčiková, Petra - Fajkus, Jiří - Sýkorová, Eva - Fojtová, Miloslava
PY - 2022
TI - Compromised function of ARM, the interactor of Arabidopsis telomerase, suggests its role in stress responses
JF - Plant Science
VL - 325
IS - December
SP - 1-16
EP - 1-16
PB - Elsevier
SN - 01689452
KW - ARM
KW - Arabidopsis thaliana
KW - Armadillo
KW - ?-catenin-like repeat
KW - RNAseq
KW - Stress response
KW - Telomerase
UR - https://www.sciencedirect.com/science/article/pii/S0168945222002783?via%3Dihub
N2 - ARM was identified previously as an interaction partner of the telomerase protein subunit (TERT) in Arabidopsis thaliana. To investigate the interconnection between ARM and telomerase and to identify ARM cellular functions, we analyzed a set of arm mutant lines and arm/tert double mutants. Telomere length was not affected in arm single mutant plants, in contrast to double mutants. In the second generation of homozygous arm-1/tert double mutants following the heterozygous state during the double mutant construction, telomeres shortened dramat-ically, even below levels in tert plants displaying severe morphological defects. Intriguingly, homozygous arm-1/ tert double mutants with short telomeres grew without obvious phenotypic changes for next two generations. Then, in agreement with the onset of phenotypic changes in tert, morphological defects were timed to the 5th arm-1/tert homozygous generation. RNAseq analyses of arm-1/tert and respective single mutants displayed markedly overlapping sets of differentially expressed genes in arm-1/tert double mutant and arm-1 single mutant lines, indicating a dominant effect of the ARM mutation. RNAseq data further implied ARM involvement in circadian rhythms, responses to drugs and to biotic and abiotic stimuli. In agreement with it, we observed sensitivity of arm-1 single mutant to the heat stress during germination. Altogether, our results suggest ARM involvement in crucial cellular processes without evidencing its role in the telomerase canonical function.
ER -
PŘIKRYLOVÁ, Klára, Agata Magdalena KILAR, Petra KOVÁČIKOVÁ, Jiří FAJKUS, Eva SÝKOROVÁ and Miloslava FOJTOVÁ. Compromised function of ARM, the interactor of Arabidopsis telomerase, suggests its role in stress responses. \textit{Plant Science}. Elsevier, 2022, vol.~325, December, p.~1-16. ISSN~0168-9452. Available from: https://dx.doi.org/10.1016/j.plantsci.2022.111453.
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