Combined modified atmosphere packaging and low temperature storage delay lignification and improve the defense response of minimally processed water bamboo shoot.

Lili Song,Haiyan Gao,Honglei Mu,Qian Yang,Ya Yuan,Yueming Jiang,Hangjun Chen,Xiangjun Fang

doi:10.1186/1752-153x-7-147

Abstract

BackgroundMinimally processed water bamboo shoot (WBS) lignifies and deteriorates rapidly at room temperature, which limits greatly its marketability. This study was to investigate the effect of modified atmosphere packaging (MAP) on the sensory quality index, lignin formation, production of radical oxygen species (ROS) and activities of scavenging enzymes, membrane integrity and energy status of minimally processed WBS when packaged with or without the sealed low-density polyethylene (LDPE) bags, and then stored at 20°C for 9 days or 2°C for 60 days.ResultsThe sensory quality of minimally processed WBS decreased quickly after 6 days of storage at 20°C. Low temperature storage maintained a higher sensory quality index within the first 30 days, but exhibited higher contents of lignin and hydrogen peroxide (H2O2) as compared with non-MAP shoots at 20°C. Combined MAP and low temperature storage not only maintained good sensory quality after 30 days, but also reduced significantly the increases in lignin content, superoxide anion () production rate, H2O2 content and membrane permeability, maintained high activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), and reduced the increase in activities of lipase, phospholipase D (PLD) and lipoxygenase (LOX). Furthermore, the minimally processed WBS under MAP condition exhibited higher energy charge (EC) and lower adenosine monophosphate (AMP) content by the end of storage (60 days) at 2°C than those without MAP or stored for 9 days at 20°C.ConclusionThese results indicated that MAP in combination with low temperature storage reduced lignification of minimally processed WBS, which was closely associated with maintenance of energy status and enhanced activities of antioxidant enzymes, as well as reduced alleviation of membrane damage caused by ROS.

Highlights

Processed water bamboo shoot (WBS) lignifies and deteriorates rapidly at room temperature, which limits greatly its marketability
The objective of this work was to investigate the sensory quality, lignin formation and radical oxygen species (ROS) production and the changes in activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), lipase, phospholipase D (PLD) and lipoxygenase (LOX) and energy status in minimally processed WBS stored in modified atmosphere packaging (MAP) at room and low temperatures
It indicated clearly that the minimally processed WBS stored in MAP accumulated CO2 more slowly as compared with those without MAP at higher temperature

Summary

Introduction

Processed water bamboo shoot (WBS) lignifies and deteriorates rapidly at room temperature, which limits greatly its marketability. This study was to investigate the effect of modified atmosphere packaging (MAP) on the sensory quality index, lignin formation, production of radical oxygen species (ROS) and activities of scavenging enzymes, membrane integrity and energy status of minimally processed WBS when packaged with or without the sealed low-density polyethylene (LDPE) bags, and stored at 20°C for 9 days or 2°C for 60 days. The outer leaf sheaths from water bamboo shoot are usually removed, which is considered a minimally processing. Biosynthesis of lignin is a complex process and regulated usually by radical oxygen species (ROS). It has been reported that there were obvious increases in membrane permeability and malondialdehyde (MDA) content accompanied by accumulation of lignin in button mushrooms [7]

Objectives

Results

Conclusion