Rootstock increases the physiological defence of tomato plants against Pseudomonas syringae pv. tomato infection

0584261 - BC 2024 RIV US eng J - Článek v odborném periodiku
Alfaro-Quezada, J. F. - Martínez, J. P. - Molinett, S. - Valenzuela, M. - Montenegro, I. - Ramirez, I. - Dorta, F. - Avila-Valdes, A. - Gharbi, E. - Zhou, Ming-Xi - Dailly, H. - Quinet, M. - Lutts, S. - Seeger, M.
Rootstock increases the physiological defence of tomato plants against Pseudomonas syringae pv. tomato infection.
Journal of Experimental Botany. Roč. 74, č. 9 (2023), s. 2891-2911. ISSN 0022-0957. E-ISSN 1460-2431
Institucionální podpora: RVO:60077344
Klíčová slova: Biotic stress * defence * hydrogen sulfide * plant-microbe interaction * Pseudomonas syringae pv * tomato * rootstock * tolerance
Obor OECD: Plant sciences, botany
Impakt faktor: 6.9, rok: 2022
Způsob publikování: Open access
https://academic.oup.com/jxb/article/74/9/2891/7022100?login=true

Climate change has intensified the infection of tomato plants by pathogens such as Pseudomonas syringae pv. tomato (Pst). Rootstocks may increase plant tolerance to leaf phytopathogens. The aim of this study was to evaluate the effects of the tolerant Poncho Negro (R) tomato rootstock on physiological defence and the role of hydrogen sulfide (H2S) in susceptible Limachino (L) tomato plant responses to Pst attack. Ungrafted (L), self-grafted (L/L), and grafted (L/R) plants were infected with Pst. Rootstock increased the concentration of antioxidant compounds including ascorbate in the scion. Tolerant rootstock induced an increase of H2S in the scion, which correlated with enhanced expression of the SlAPX2 gene. A high accumulation of salicylic acid was observed in Pst-inoculated grafted L/L and L/R plants, but this was higher in L/R plants. The increase of H2S during Pst infection was associated with a reduction of ethylene in L/R plants. Our study indicates that the Poncho Negro rootstock reduced the symptoms of bacterial speck disease in the Limachino tomato plants, conferring tolerance to Pst infection. This study provides new knowledge about the impact of rootstock in the defence of tomato plants against leaf pathogens that could be used in sustainable management of tomato cultivation.
Trvalý link: https://hdl.handle.net/11104/0352307