- salicylic acidPositive and negative results37 papers: 34 positive, 3 negative or no effect
- ethenePositive and negative results30 papers: 16 positive, 14 negative or no effect
- (+)-abscisic acidPositive and negative results20 papers: 16 positive, 4 negative or no effect
- (-)-methyl jasmonatePositive and negative results19 papers: 15 positive, 4 negative or no effect
- sodium chloridePositive and negative results12 papers: 6 positive, 6 negative or no effect
- Trichoderma harzianumPositive and negative results8 papers: 7 positive, 1 negative or no effect
- calcium atomPositive and negative results8 papers: 5 positive, 3 negative or no effect
- nitric oxidePositive and negative results8 papers: 3 positive, 5 negative or no effect
- (2-chloroethyl)phosphonic acidPositive and negative results7 papers: 4 positive, 3 negative or no effect
- jasmonic acidPositive and negative results7 papers: 5 positive, 2 negative or no effect
- silicon atomPositive and negative results7 papers: 6 positive, 1 negative or no effect
- CoronatinePositive and negative results6 papers: 3 positive, 3 negative or no effect
- hydrogen peroxidePositive and negative results6 papers: 5 positive, 1 negative or no effect
- 3-aminobutanoic acidPositive and negative results5 papers: 3 positive, 2 negative or no effect
- Bacillus velezensisPositive and negative results5 papers: 3 positive, 2 negative or no effect
- Botrytis cinereaPositive and negative results5 papers: 3 positive, 2 negative or no effect
- 1-methylcyclopropenePositive and negative results4 papers: 1 positive, 3 negative or no effect
- indole-3-acetic acidPositive and negative results4 papers: 2 positive, 2 negative or no effect
- 2,4-DPositive and negative results3 papers: 2 positive, 1 negative or no effect
- Meloidogyne javanicaPositive and negative results3 papers: 1 positive, 2 negative or no effect
- Pseudomonas syringaePositive and negative results3 papers: 1 positive, 2 negative or no effect
- calcium(2+)Positive and negative results3 papers: 2 positive, 1 negative or no effect
- hydrogen sulfidePositive and negative results3 papers: 2 positive, 1 negative or no effect
- iron atomPositive and negative results3 papers: 1 positive, 2 negative or no effect
- silver atomPositive and negative results3 papers: 2 positive, 1 negative or no effect
- 1-naphthaleneacetic acidPositive and negative results2 papers: 1 positive, 1 negative or no effect
- Nicotiana tabacumPositive and negative results2 papers: 1 positive, 1 negative or no effect
- calcium chloride dihydratePositive and negative results2 papers: 1 positive, 1 negative or no effect
- fusicoccinPositive and negative results2 papers: 1 positive, 1 negative or no effect
- potassium nitratePositive and negative results2 papers: 1 positive, 1 negative or no effect
- zinc atomPositive and negative results2 papers: 1 positive, 1 negative or no effect
- loss of functionPositive and negative results80 papers: 20 positive, 60 negative or no effect
- inoculationPositive and negative results58 papers: 49 positive, 9 negative or no effect
- droughtPositive and negative results40 papers: 27 positive, 13 negative or no effect
- infectionPositive and negative results38 papers: 26 positive, 12 negative or no effect
- coldPositive and negative results30 papers: 20 positive, 10 negative or no effect
- heatPositive and negative results27 papers: 13 positive, 14 negative or no effect
- salinityPositive and negative results27 papers: 18 positive, 9 negative or no effect
- classPositive and negative results25 papers: 18 positive, 7 negative or no effect
- lightPositive and negative results25 papers: 17 positive, 8 negative or no effect
- mechanicalPositive and negative results22 papers: 16 positive, 6 negative or no effect
- mycorrhizaPositive and negative results19 papers: 18 positive, 1 negative or no effect
- applicationPositive and negative results15 papers: 14 positive, 1 negative or no effect
- transgenicPositive and negative results11 papers: 5 positive, 6 negative or no effect
- overexpressionPositive and negative results10 papers: 6 positive, 4 negative or no effect
- otherPositive and negative results9 papers: 8 positive, 1 negative or no effect
- phosphorusPositive and negative results9 papers: 4 positive, 5 negative or no effect
- resistance inducerPositive and negative results9 papers: 8 positive, 1 negative or no effect
- co2Positive and negative results8 papers: 6 positive, 2 negative or no effect
- nitrogenPositive and negative results8 papers: 4 positive, 4 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.