Effect of high O₂treatments on physiochemical, lycopene and microstructural characteristics of cherry tomatoes during storage

Abstract

In order to study the resistance of microstructural characteristics and the changes of physical and chemical indexes in cherry tomatoes during its storage period, fresh cherry tomatoes were treated with high O2 (40%, 60%, 80%, and 100%). The results showed that pure oxygen treatment inhibited the decay rate of tomato significantly, delayed the improvement of membrane permeability, reduced lipid peroxide content, and maintained a good cell structure. Compared with the control, the tomato with 100% oxygen concentration treatment obtained the best results after 28 days of storage, which reflected in that the decay rate is only 30%, titrable acidity (TA) decreased by 53%, malondialdehyde (MDA) was 3.8 mmol/kg and lycopene was 3.1 mg/100 g, and smallest increase of electrical conductivity from 24% to 45%. High concentration oxygen could avoid the anaerobic respiration of tomato to some extent and reduce the production and accumulation of acetaldehyde, ethanol, and ethyl acetate. Practical applications High oxygen (21%–100% O2) processing technology, developed in recent years, is one of the postharvest processing techniques of fruit and vegetables. Metabolism of cherry tomatoes after picking was deeply modified by the application of high oxygen, which inhibited the decay and delayed the ripening. Cherry tomatoes exposed to high oxygen concentration (100% O2) were shown to have a lower increase in relative electrolyte leakage rate and lipid peroxidation as well as lower membrane damage. High O2 treatment technology is expected to develop into a new concept of controlled atmosphere storage technology, which will play a significant role in fruit and vegetables in storage.

Rahnella aquatilis JZ-GX1 alleviates iron deficiency chlorosis in Cinnamomum camphora by secreting desferrioxamine and reshaping the soil fungal community

“…) can lead to cell membrane damage and EL and subsequently to membrane lipid peroxidation, and the degree of membrane lipid peroxidation can be reflected by the MDA content (Guo et al, 2019). In this experiment, we found that iron deficiency led to increases in the H 2 O 2 and O 2 − contents in C. camphora leaves, which was consistent with the results obtained by Zhou C. et al (2017) and Song et al (2018) for peanut and chrysanthemum.…”

Combination of precooling with ozone fumigation or low fluctuation of temperature for the quality modifications of postharvest sweet cherries

“…However, the weight loss increased slowly of treatment groups in 3–9 days. The water loss was mainly due to the transpiration and respiration of the fruit itself (Guo et al., 2019). In the late storage period (9–18 days), the weight loss rate of the three treatment groups was significantly lower than that of the CK group ( p < .05).…”

Melatonin treatment improves postharvest quality and regulates reactive oxygen species metabolism in “Feizixiao” litchi based on principal component analysis

“…Superoxide anion ( ) production rates of litchi peel were measured using the hydroxylamine method ( Guo et al, 2019 ). In brief, a 2.0 g of litchi peel powder was added to 10 mL of 50 mmol·L −1 phosphoric acid buffer with a pH of 7.8.…”

“…The changes in the hue of litchi were observed on 0, 3, 6, 9, and 12 days (He et al, 2019). 2O − ) production rate and hydrogen peroxide (H 2 O 2 ) content Superoxide anion ( O 2 − ) production rates of litchi peel were measured using the hydroxylamine method (Guo et al, 2019). In brief, a 2.0 g of litchi peel powder was added to 10 mL of 50 mmol•L −1 phosphoric acid buffer with a pH of 7.8.…”