The Influence of Storage Conditions and 1-MCP Treatment on Ethylene Evolution and Fruit Quality in ‘Gala’ Apples

In this study, we evaluated the influence of 1-methylcyclopropene (1-MCP) treatment and ultra-low oxygen (ULO)-controlled atmosphere conditions: 2.0% CO 2 and 1.0% O 2 (ULO1), and 2.5% CO 2 and 1.5% O 2 (ULO2) on the changes in chemical composition in the apples of one of the commercially available and the most consumerpreferred cultivar 'Auksis' during long-term storage. This study was conducted from 2012 to 2014 at the Institute of Horticulture, Latvia University of Agriculture in Dobele. The results of the current research evidence that in many cases the chemical composition of 'Auksis' apples depends on the weather conditions (growing season) and storage technology. In terms of storage technology, a better preservation of soluble solids was achieved when ULO conditions and 1-MCP treatment were applied. Moreover, findings reveal that polyphenols present in 'Auksis' apples remained unchanged after six months' storage under ULO conditions. While due to further ripening process in control and 1-MCP treated apples the content of polyphenols increased. The harvest time is the key factor influencing the total pectin content, while, during six months' storage the main factors affecting the content of pectin were the growing season and storage technology. Analysis of variance showed that the content of vitamin C in 'Auksis' apples depended mainly on the weather conditions, whereas post-harvest vitamin C losses are affected by harvesting time and storage technology.

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“…The treatment with 1-methylcyclopropene (1-MCP) was implemented according to Wawrzyńczak et al (2007).…”

Section: Methodsmentioning

confidence: 99%

Effect of storage technology on the chemical composition of apples of the cultivar ‘Auksis’

Radenkovs

Juhnevica-Radenkova

2017

Zemdirbyste-Agriculture

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“…This ratio was selected on the well-founded scientific research of Polish researchers affirming abovementioned concentration as more suitable for apple treatment with 1-MCP (Wawrzynczak et al, 2007). The solution was prepared in an Erlenmeyer flask, which was subsequently placed in an air-tight processing container with apples intended for storage.…”

Section: Methodsmentioning

confidence: 99%

Influence of 1-MCP treatment and storage conditions on the development of microorganisms on the surface of apples grown in Latvia

Juhnevica-Radenkova

Radenkovs

Segliņa

2016

Zemdirbyste-Agriculture

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The quality of fruits during storage depends on the storage environment and fruit microorganisms, since the activity of microorganisms can cause the decay of fruits. A correctly selected composition of gas mixture in a storage chamber extends shelf-life by reducing development of microorganisms, accordingly ensuring microbiological safety of fruits. The aim of the study was to evaluate the dynamics of microflora on the surface of apples within six months of cold storage that prior to storage had been treated with 1-methylcyclopropene (1-MCP), and those stored in ultra low oxygen (ULO) under different controlled atmosphere conditions. The highest microbial diversity and amount on the apple fruit surface was found when stored in cold storage. At the beginning of storage, 70% of the total surface microflora of fruits consisted of the following microscopic fungi: Penicillium spp., Alternaria spp., Botrytis spp., Aspergillus spp., Mucor genus and Cladosporium spp., bacteria from Bacillus genus, and yeasts like Candida curvata, C. fomata, Pichia etchellsii and P. carsonii. After three and six months of apple storage, partial microorganism inhibition was observed when comparing cold storage and cold storage + 1-MCP treatments, in turn, the most positive significant result was achieved when apples were stored under controlled atmosphere conditions. After six months of apple storage, the lowest amount of colony forming units (CFU) of bacteria, mould and yeast was estimated on the surface of apple fruits that had been stored using controlled atmosphere technique. Microorganisms, including Penicillium, Bacillus spp., Candida curvata, Pichia etchellsii and C. fomata were identified on the surface of ULO1 samples, while on ULO2 samples only Penicillium spp., Bacillus spp., C. curvata and C. fomata. After storage in controlled atmosphere, 90% of all microscopic fungi present on the surface of apples were yeasts.

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“…1-MCP powdery substance was dissolved in warm water +50 ± 2°C by ratio of 1-MCP to water as 1:30, the concentration of the obtained solution was 0.625 µl L -1 . This ratio was chosen based on the wellfounded scientific research of Polish researchers affirming the above-mentioned concentration as more suitable for apple treatment with 1-MCP (Wawrzynczak et al, 2007). The solution was prepared in an Erlenmeyer flask, which was subsequently placed in an air-tight processing container with apples intended for storage.…”

Section: Methodsmentioning

confidence: 99%

Microbiological changes and severity of decay in apples stored for a long-term under different storage conditions

Juhnevica-Radenkova

Radenkovs

Segliņa

2016

Zemdirbyste-Agriculture

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Apples occupy most of the Latvian vegetable market, nevertheless there is a lack of good quality locally grown apples. Using advanced storage technologies, such as storage in controlled atmosphere in ultra low oxygen (O 2 ) (ULO) and elevated carbon dioxide (CO 2 ) conditions, as well as pre-treatment of fruits with 1-Methylcyclopropene (1-MCP) will substantially improve the quality of fruits and globally assist apple growers to distribute more qualitative and safe fruits on the local market. The aim of the study was to ascertain the causes of apple decay that occurred during storage under different conditions. Two apple storage technologies were tested in this study: cold storage under conventional conditions + 1-Methylcyclopropene treatment and controlled atmosphere -2.0% CO 2 , 1.0% O 2 (ULO1) and 2.5% CO 2 , 1.5% O 2 (ULO2) conditions. After apple storage for six months the following microscopic fungi were isolated: Penicillium expansum (30.44%), Monilinia fructigena (26.08%), Neofabraea alba (21.73%), Colletotrichum acutatum (13.04%), Botrytis cinerea (8.69%) in cold storage, while P. expansum (35.26%), Colletotrichum acutatum (23.57%), Neofabraea alba (11.76%), B. cinerea (11.76%), M. fructigena (11.76%) and Fusarium avenaceum (5.89%) were isolated from fruits that prior to storage were pre-treated with 1-MCP. Apples that had been stored under ULO1 conditions predominantly were contaminated with: N. alba (33.34%), M. fructigena (26.69%), B. cinerea (13.33%), P. expansum (6.66%), F. avenaceum (6.66%), Phomopsis/ Diaporthe eres (6.66%) and Mucor circinelloides (6.66%), while under ULO2: N. alba (33.33%), M. fructigena (33.33%), F. avenaceum (16.67%) and P./D. eres (16.67%). Diversity of microscopic fungi, which were isolated from differently stored and decayed apple samples, was quite similar, though with insignificant difference. For instance, microscopic fungus F. avenaceum was not found only in cold storage kept fruits, while microscopic fungus of the genus P./D. eres was identified when apples were stored under ultra low oxygen conditions.

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The Influence of Storage Conditions and 1-MCP Treatment on Ethylene Evolution and Fruit Quality in ‘Gala’ Apples

Cited by 12 publications

References 33 publications

Effect of storage technology on the chemical composition of apples of the cultivar ‘Auksis’

Effect of storage technology on the chemical composition of apples of the cultivar ‘Auksis’

Influence of 1-MCP treatment and storage conditions on the development of microorganisms on the surface of apples grown in Latvia

Microbiological changes and severity of decay in apples stored for a long-term under different storage conditions

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