Physiology: antioxidant enzymes · Populus (poplar)

1. salicylic acidResults differ2 papers: 1 positive, 1 negative or no effect · 1 pair of papers confirmed to differ
2. sodium nitroprussidePositive and negative results2 papers: 1 positive, 1 negative or no effect
3. melatoninResults agree2 papers: 2 positive, 0 negative or no effect
4. ozonePositive and negative results4 papers: 3 positive, 1 negative or no effect
5. droughtResults agree3 papers: 3 positive, 0 negative or no effect
6. mechanicalResults agree2 papers: 2 positive, 0 negative or no effect
7. mycorrhizaResults agree2 papers: 2 positive, 0 negative or no effect
8. solarizationResults agree2 papers: 2 positive, 0 negative or no effect

Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.