Al-Tolerant Barley Mutant hvatr.g Shows the ATR-Regulated DNA Damage Response to Maleic Acid Hydrazide.
Int J Mol Sci
; 21(22)2020 Nov 12.
Article
in En
| MEDLINE
| ID: mdl-33198069
ABSTRACT
ATR, a DNA damage signaling kinase, is required for cell cycle checkpoint regulation and detecting DNA damage caused by genotoxic factors including Al3+ ions. We analyzed the function of the HvATR gene in response to chemical clastogen-maleic acid hydrazide (MH). For this purpose, the Al-tolerant barley TILLING mutant hvatr.g was used. We described the effects of MH on the nuclear genome of hvatr.g mutant and its WT parent cv. "Sebastian", showing that the genotoxic effect measured by TUNEL test and frequency of cells with micronuclei was much stronger in hvatr.g than in WT. MH caused a significant decrease in the mitotic activity of root cells in both genotypes, however this effect was significantly stronger in "Sebastian". The impact of MH on the roots cell cycle, analyzed using flow cytometry, showed no differences between the mutant and WT.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Hordeum
/
DNA Damage
/
Aluminum
/
Ataxia Telangiectasia Mutated Proteins
/
Maleic Hydrazide
Language:
En
Journal:
Int J Mol Sci
Year:
2020
Document type:
Article
Affiliation country: