Genome stability of <i>vtc1</i>, <i>tt4</i>, and <i>tt5 Arabidopsis thaliana</i> mutants impaired in protection against oxidative stress
Bibliographic record
Abstract
Reactive oxygen species (ROS) are formed upon normal cellular metabolism or influence of environmental factors and, at normal levels, they play an important physiological role. However, at elevated levels, radicals are toxic and extremely dangerous to all cellular components, including DNA. To efficiently protect themselves, plants have developed sophisticated mechanisms for radical screening and scavenging. In this paper, we analyzed the genome stability of several plant mutants impaired in the protection against free radicals. We crossed the well-known uidA recombination reporter line 651 to flavonoid (tt4 and tt5) and Vitamin C (vtc1)-deficient plants. We found that in all lines tested, both spontaneous and induced (UVC and Rose Bengal (RB)) recombination was higher than in the original 651 parental line. The mRNA expression levels of various DNA repair (RAD1, RAD54-like, MSH3) as well as radical scavenging genes (GPx1, CAT, FSD3) exhibited substantial differences in both control and induced conditions. Our data show that plants impaired in certain aspects of the protection against elevated levels of free radicals induce the production of scavenging enzymes earlier than wild-type (wt) plants, and the higher level of radical species results in the increased incidence of spontaneous double-strand breaks resulting in a higher expression of DNA repair genes.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".