Abstract
The objective of our study was to investigate the effectiveness of ultrasonic treatment combined with 1-methylcyclopropene (1-MCP) on storage quality and gene expression of postharvest apples compared with ultrasonic or 1-MCP treatment alone. Ethylene production, respiratory rate, firmness, soluble solid content (SSC), peroxidase (POD), superoxide dismutase (SOD), catalase (CAT) activity, and ethylene receptors gene expression of apples were tested. The results indicated 1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples. Furthermore, effect of the combination was more observable than that of ultrasonic or 1-MCP alone. In a word, the results proved the technology of ultrasonic plus 1-MCP was effective to enhance the storage quality and lengthen the life span of apples. PRACTICAL APPLICATIONS: Jonah king apple has the characteristics of crisp texture, long shelf life, high sugar content, and solidity-acid ratio, which is suitable for the taste of east and southeast Asian. However, as for a kind of respiration climacteric fruit, the commercial quality of Jonah king apple dramatically drops during the later stage of storage due to its softening, superficial scald, and perishability. One of the primary problems in apple preservation is the reduction of microbial growth, which directly affects the internal quality of apple fruit. The aim of present work is to estimate the effect of ultrasonic plus 1-MCP treatment on storage quality and life span of apple fruit, as well as to provide theoretical basis to enhance the storage quality and lengthen the life span of apples.
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Claims 6
Claim · model-written summary
1-MCP or ultrasonic treatment restrained ethylene production and respiratory rate in stored apple compared with untreated samples.
- Taxon
- apple
Malus domesticat0 - Treatment
- 1-MCP or ultrasonic treatmente1
- Outcome
- ethylene production and respiratory ratee1
- Direction
- restrainede1
- Comparator
- untreated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e1“1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples”
Claim · model-written summary
1-MCP or ultrasonic treatment improved apple firmness compared with untreated samples.
- Taxon
- appleMalus domesticat0
- Treatment
- 1-MCP or ultrasonic treatmente1
- Outcome
- firmnesse1
- Direction
- improvede1
- Comparator
- untreated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e1“1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples”
Claim · model-written summary
1-MCP or ultrasonic treatment suppressed the escalation of soluble solid content in apple compared with untreated samples.
- Taxon
- appleMalus domesticat0
- Treatment
- 1-MCP or ultrasonic treatmente1
- Outcome
- escalation of SSCe1
- Direction
- suppressede1
- Comparator
- untreated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e1“1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples”
Claim · model-written summary
1-MCP or ultrasonic treatment enhanced the activities of POD, SOD and CAT in apple compared with untreated samples.
- Taxon
- appleMalus domesticat0
- Treatment
- 1-MCP or ultrasonic treatmente1
- Outcome
- activities of POD, SOD, and CATe1
- Direction
- enhancede1
- Comparator
- untreated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e1“1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples”
Claim · model-written summary
1-MCP or ultrasonic treatment suppressed the gene expression of MdETR1 and MdERS1 in apple compared with untreated samples.
- Taxon
- appleMalus domesticat0
- Treatment
- 1-MCP or ultrasonic treatmente1
- Gene
- MdETR1 and MdERS1e1
- Outcome
- gene expression levele1
- Direction
- suppressede1
- Comparator
- untreated samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e1“1-MCP or ultrasonic treatment-restrained ethylene production and respiratory rate, improved firmness, suppressed the escalation of SSC, enhanced the activities of POD, SOD, and CAT, suppressed the gene expression level of MdETR1 and MdERS1 compared with the untreated samples”
Claim · model-written summary
The combination of ultrasonic treatment and 1-MCP had a more observable effect on apple than either treatment alone.
- Taxon
- appleMalus domesticat0
- Treatment
- the combinatione2
- Outcome
- effecte2
- Direction
- more observablee2
- Comparator
- ultrasonic or 1-MCP alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“harvested apple fruit”
e2“Furthermore, effect of the combination was more observable than that of ultrasonic or 1-MCP alone”
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See all 5 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.