TOLERANCE RESPONSE TO CLAVIBACTER MICHIGANENSIS SUBSP. MICHIGANENSIS IN TOMATO PLANTS TREATED WITH SELENIUM

S. González-Morales, R. Castillo-Godina, A. Benavides-Mendoza, L.J. Ríos-González
Bacterial canker in tomato plants caused by Clavibacter michiganensis subsp. michiganensis (Cmm), is one of the major limitations of tomato production in the world. The aim of this study was to determine if application of sodium selenite to tomato seedlings can elevate their tolerance to Cmm. Greenhouse grown 4-week-old tomato seedlings cultivar ‘Rio Grande’ with four or five fully expanded leaves were used for all experiments. Application of sodium selenite was done in irrigation system (2 mg/L) (SS) and leaf spraying (10 mg/L) (SA). Four days later the seedlings were inoculated with the inoculum (Cmm) by sprays on leaves. Disease severity in inoculated plants was reduced by 11% in the plants with irrigation-applied selenium and 8% in the plants treated with foliar selenium, compared to the inoculated control. The variables related to photosynthesis showed higher values in SS than treatments with SA. Regarding agronomic traits, in plant height, root length and dry weight of leaves and stem, there were no significant differences between treatments compared with absolute control. Dry weight of root increased by 4% in plants sprayed with selenium compared to the absolute control. The application of selenium as sodium selenite can cause an elevated tolerance to the disease caused by Cmm, besides photosynthesis related changes.
González-Morales, S., Castillo-Godina, R., Benavides-Mendoza, A. and Ríos-González, L.J. (2015). TOLERANCE RESPONSE TO CLAVIBACTER MICHIGANENSIS SUBSP. MICHIGANENSIS IN TOMATO PLANTS TREATED WITH SELENIUM. Acta Hortic. 1069, 203-209
DOI: 10.17660/ActaHortic.2015.1069.29
https://doi.org/10.17660/ActaHortic.2015.1069.29
systemic resistance, sodium selenite, elicitor
English

Acta Horticulturae