采前
茉莉酸甲酯
拉图卡
植物化学
激发子
水杨酸
园艺
咖啡酸
生物
食品科学
植物
化学
抗氧化剂
采后
生物化学
基因
作者
Jesús Omar Moreno-Escamilla,Emilio Álvarez‐Parrilla,Laura A. de la Rosa,P. Paseiro‐Losada,Gustavo A. González‐Aguilar,Joaquı́n Rodrigo-García
标识
DOI:10.1021/acs.jafc.7b01702
摘要
The effect of four elicitors on phytochemical content in two varieties of lettuce was evaluated. The best preharvest day for application of each elicitor was chosen. Solutions of arachidonic acid (AA), salicylic acid (SA), methyl jasmonate (MJ), and Harpin protein (HP) were applied by foliar aspersion on lettuce leaves while cultivating under hydroponic conditions. Application of elicitors was done at 15, 7, 5, 3, or 1 day before harvest. Green lettuce showed the highest increase in phytochemical content when elicitors (AA, SA, and HP) were applied on day 7 before harvest. Similarly, antioxidant activity rose in all treatments on day 7. In red lettuce, the highest content of bioactive molecules occurred in samples treated on day 15. AA, SA, and HP were the elicitors with the highest effect on phytochemical content for both varieties, mainly on polyphenol content. Antioxidant activity also increased in response to elicitation. HPLC-MS showed an increase in the content of phenolic acids in green and red lettuce, especially after elicitation with SA, suggesting activation of the caffeic acid pathway due to elicitation.
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