The post-harvest internal browning (IB) and quality in pineapple (Ananas comosus L. ‘Comte de Paris’)
fruit were studied in relation to pre-harvest salicylic acid (SA) spray (PSS) or/and post-harvest salicylic
acid immersion (PSI) treatments at 10 ◦C for up to 20 days plus 2 days at 20 ◦C (shelf-life). In addition, the
activities of polyphenol oxidase (PPO) and phenylalanine ammonia-lyase (PAL) were measured during
cold storage. The results showed that all SA treatments significantly reduced IB incidence and intensity.
Furthermore, SA did not affect soluble solids content (SSC), titratable acidity (TA) and total phenolics
(TP) content, but delayed the decline of ascorbic acid (AsA) content. At the same time, SA significantly
inhibited PPO and PAL activities. The study indicated the beneficial effect of SA by pre-harvest spray
and/or post-harvest immersion on pineapple fruit quality and resistance to IB, and PSS + PSI treatment
showed the best effect.