Wounding lettuce leaves induces the de novo synthesis of phenylalanine ammonia-lyase (PAL, EC 4.3.1.5), the accumulation of phenolic compounds, and subsequent tissue browning. A brief heat-shock at 45 C reduces the rise in wound-induced PAL, the accumulation of phenolic compounds, and tissue browning. The activity of PAL measured 24 h after wounding and the content of phenolic compounds (absorb...

The impact of salt stress is becoming more prevalent each year, largely due to the effects climate change. Limited availability salt-free water rising concern for hydroponics lettuce production. Despite evidence supporting stress-induced quality losses and physiological changes, studies on romaine salt-stress tolerance are limited. This study examined mechanism underlying sodium chloride (NaCl)...

The microbial safety of fresh produce continues to be a real concern. Novel nonthermal technologies are required lessen the risk pathogen contamination. objective this research was develop and evaluate effects direct in-package pulsed light (PL) treatment on survival E. coli O157:H7 in Romaine lettuce. Treatment influence reduction background loads lettuce also explored. A three strain-cocktail...