Humic Substances from Different Sources Modulate Salicylic Acid-Mediated Defense in Plants Infected by Powdery Mildew
Rakiely M. Silva, Vicente Mussi-Dias, Fábio L. Olivares, Lázaro E. P. Peres, Luciano P. Canellas · 2025
Read Humic Substances from Different Sources Modulate Salicylic Acid-Mediated Defense in Plants Infected by Powdery Mildew by Rakiely M. Silva, Vicente Mussi-Dias, Fábio L. Olivares, Lázaro E. P. Peres, Luciano P. Canellas (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12737289.txt.
Description
Silva and co-authors (2025) tested whether humic substances from two sources can strengthen tomato defense against powdery mildew. Farming leans heavily on chemical inputs, and these soil-derived substances are candidate biostimulants that can both feed growth and wake up plant immunity. The team compared substances from vermicompost and from peat, described their chemical makeup, and measured defense enzymes and gene activity in tomato plants infected with the mildew fungus.
Both substances reduced disease severity and switched on key defense genes tied to the salicylic acid pathway, with the peat material protecting better. The boost in gene activity and enzyme action was stronger in infected plants than in healthy ones, as if the substances prime the defense for attack. The authors link the different effects to the substances' different chemical structures, and propose them as sustainable tools for plant immunity.
Catalog record
| CREATOR | Rakiely M. Silva, Vicente Mussi-Dias, Fábio L. Olivares, Lázaro E. P. Peres, Luciano P. Canellas |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 41 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |