Potassium phosphite primes defense responses in potato against Phytophthora infestans

Identificación y alternativas de manejo de la cenicilla del rosal

“…It is important to highlight that the success of phosphites in the control of some diseases is due to its systemic action, which is why they act upon all areas of the plant. Several authors report that phosphite displays a complex form of action, acting directly on the development of the pathogen, inhibiting the growth of the mycelia and the cell wall synthesis (King et al, 2010), or indirectly by the stimulation of the plants' defense responses, such as the production of phytoalexins (Lovatt and Mikkelsen, 2006;Lobato et al, 2011), deposition of callose, reactive species of oxygen and the induction of proteins related to pathogenesis (Eshraghi et al, 2011;Machinandiarena et al, 2012).…”

“…However, in this study the potassium phosphite reduced the length and diameter of stems and floral buds in comparison to the control in both trials, which could be due to the doses applied, since there is evidence that shows de respuestas de defensa de las plantas como la producción de fitoalexinas (Lovatt y Mikkelsen, 2006;Lobato et al, 2011), deposición de calosa, especies reactivas de oxígeno y la inducción de proteínas relacionadas con la patogénesis (Eshraghi et al, 2011;Machinandiarena et al, 2012).…”

“…Likewise, phosphites are capable of controlling diseases in diverse crops, Volumen 34, Número 1, 2016 son, 2005); además la necesidad de minimizar el uso de fungicidas conduce a la búsqueda de alternativas de control como el uso de inductores de defensa; tal es el caso del silicio, que ha mostrado su potencial para mejorar los componentes estructurales y bioquímicos de resistencia a enfermedades como la cenicilla en diferentes cultivos como pepino (Liang et al, 2005), fresa y uva (Botta et al, 2011) y en rosas para maceta (Shetty et al, 2012). Así mismo, los fosfitos tienen la capacidad de controlar enfermedades en diversos cultivos, actuando directamente sobre el patógeno e indirectamente mediante la estimulación de respuestas de defensa del hospedante (Deliopoulos et al, 2010); al respecto, se reportó que el fosfito de potasio induce resistencia en el cultivo de papa a Phytophthora infestans (Mont) de Bary (Machinandiarena et al, 2012) y reduce significativamente la incidencia y severidad de Oidium sp. en pepino (Cucumis sativus L.) (Yañez et al, 2012), en plántulas de cacao (Theobroma cacao L.) tuvo un efecto antifúngico inhibiendo la germinación de conidios de Verticillium dahliae Kleb.…”

“…Poll. y Erysiphe acting directly upon the pathogen, and indirectly, by the stimulation of defense responses from the host (Deliopoulos et al, 2010); in this regard, potassium phosphite was reported to induce resistance in potato to Phytophthora infestans (Mont) from Bary (Machinandiarena et al, 2012) and significantly reduces the incidence and severity of Oidium sp. In cucumber (Cucumis sativus L.) (Yañez et al, 2012), in cocoa plantlets (Theobroma cacao L.), it had an antifungal effect, inhibiting the germination of Verticillium dahliae Kleb.…”

Effects of potassium fertilisation on late potato blight and yield - short communication

“…Potassium increases the resistance of plants to stresses and supports the natural defences of plants against pathogens such as Phytophthora infestans and alternaria spp. (Feng & Zeng 2006;Machinandiarena et al 2012). The availability of potassium ions (K + ) to plants, despite their prevalence in the environment, is limited because about 90% of the sources of this element are in forms which cannot be assimilated by the plant (Zörb et al 2014;Madras & Koubová 2015).…”