EVALUACIÓN DE INHIBIDORES DE ETILENO PARA PROLONGAR LA VIDA DE FLORERO DE Gardenia jasminoides Ellis

Gardenia (Gardenia jasminoides Ellis) is an ornamental plant highly appreciated for its fragrance and coloration; however, one of its disadvantages during its commercialization is its short post-harvest life marked by a change in the flower coloration. The action inhibition of ethylene has been taken advantage of as a strategy to extend the vase life of some ornamental plants, and thus, the application of two ethylene inhibitors was evaluated, with the purpose of extending the vase life of gardenia. The inhibitors were applied for 4, 12 and 24 h in flowers cut in different stages of development. As parameters of senescence the following were evaluated: fresh weight, color of petals, flower longevity, flower epinasty,and application of 1-MCP. The results showed that the 1-MCP delayed the senescence when applied on flowers in the phase known as “striped” during 24 h, increasing the life of the vase almost two days.La gardenia (Gardenia jasminoides Ellis), es una planta ornamental altamente apreciada por su fragancia y coloración blanca; sin embargo, una desventaja durante su comercialización es la corta vida poscosecha marcada por un cambio en la coloración de la flor. La inhibición de la acción del etileno se ha aprovechado como estrategia para prolongar la vida de florero de algunas plantas ornamentales, por ello, se evaluó la aplicación de dos inhibidores de etileno, con el propósito de prolongar la vida de florero de la gardenia. Los inhibidores se aplicaron durante 4, 12 y 24 h en flores cortadas en diferentes estadios de desarrollo. Se evaluó como parámetros de senescencia el peso fresco, color de pétalos, longevidad floral y en el tratamiento con 1-MCP, la epinastía floral. Los resultados demostraron que el 1-MCP retardó la senescencia aplicado en flores en la fase conocida como “rayada” durante 24 h, incrementó la vida de florero casi dos días

Ethylene response factors and their role in plant defence

The APETALA2/ethylene response factor family of transcription factors plays crucial roles in the regulation of gene expression during plant development and the response to biotic and abiotic stress. The Ethylene Response Factor (ERF) subfamily is particularly important in the establishment and the tight regulation of plant defences through a balance of positive and negative transcriptional regulation. The expression of the ERFs is induced by pathogens with different lifestyles and they have been implicated in resistance to biotrophs, necrotrophs, and hemibiotrophs. ERFs achieve this by acting as integrators in the crosstalk between signaling pathways mediated by ethylene (ET), jasmonic acid (JA), and salicylic acid (SA) to modulate gene expression according to the stimuli sensed. This review collates recent findings on the regulation of this family of transcription factors (TFs), including transcriptional and post-translational regulation. While DNA binding is typically conferred through the characteristic AP2 domain, the function of other domains including EDLL and EAR in regulating gene expression is discussed. While AP2/ERFs have been implicated in a range of plant stress responses, this review focuses on ERFs in the context of the plant response to pathogens