ArticleDoklady. Biochemistry and biophysics2025
Influence of Temperature on Salicylate-Induced Components in Tomato Plants Immune System under Invasion with Root-Knot Nematode Meloidogyne incognita.
Article in Doklady. Biochemistry and biophysics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The tomato gene Mi-1,2 is currently the only commercially available source of resistance to the root-knot nematode Meloidogyne incognita, which loses activity when soil temperatures exceed 28°C. The study aimed to investigate the components of the tomato immune system to root-knot nematode associated with salicylic acid (SA) at elevated (34°C) and normal (25°C) temperatures. The obtained results showed that the Mi-1,2-mediated immune response is disrupted at 34°C. At elevated temperatures in plants infested with nematodes, the synthesis of salicylic acid and the activity of phenylalanine ammonia lyase are reduced, and catalase is inhibited, a decrease in the activity of which was discovered at the stage of nematode penetration into the roots and the creation of feeding structures-giant cells. Elevated temperature decreased the activity of the PR-1 gene, a marker of systemic plant resistance. These results provide important information on the sensitivity temperature of the Mi-1.2 resistance gene and the effect of elevated temperature on SA-dependent components of the immune system that are associated with tomato resistance to the nematode.
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