Effect of Cell-free Culture Broth of Lactic Acid Bacteria, Pediococcus lolii, on Inhibition of Browning and Quality of Minimally Processed Sweet Bamboo (Dendrocalamus asper Backer ex K. Heyne) Shoot

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Suwipa Khamhaeng
Anchaya Mongkolchaiyaphruek
Wanna Malaphan

Abstract

Browning of fresh minimally processed bamboo shoots is often encountered during
storage and sale, making it unacceptable to consumers. Such browning can be prevented by using sulfide group chemicals. However, the use of chemicals may cause allergic reactions in consumers. Currently, the production of minimally processed products tries to find out a safe method using biological substances. Thus, this research aimed to study the optimum concentration of cell free supernatant (CFS) from Pediococcus lolii and soaking duration for browning inhibition of fresh minimally processed bamboo (Dendrocalamus asper Backer ex K. Heyne) shoots. The experiment was performed in 3 x 3 factorial in completely randomized design. Two factors, concentrations of CFS were 0, 50, and 100% (by volume), and the soaking duration were 5, 10, and 20 minutes, consisting of 9 treatments, 8 replications each. The nontreated and treated fresh minimally processed bamboo shoots were packed in a foam tray then wrapped with PVC plastic, and stored at a temperature of 10°C, 90 ± 5% RH for 8 days. It was found that fresh minimally processed bamboo shoots soaked in 100% concentration of CFS at
all soaking durations, showed the inhibition of browning and the growth of microorganisms effectively (P < 0.01) throughout the storage life, without affecting changes in appearance, taste,
and texture (P > 0.05). Therefore, the CFS from lactic acid bacteria, Pediococcus lolii, can be used as a substitute for chemicals to inhibit the browning which is safe for consumers and environmentally friendly.

Article Details

Section
Research article

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