title: Expression of genes associated with ethylene-signalling pathway in harvested banana fruit in response to temperature and 1-MCP treatment.
abstract: BACKGROUND
  Little attention has been paid to characterising the ethylene-signalling pathway genes in relation to abnormal ripening of harvested banana fruit during storage at high temperature. The aim of the present study was to investigate banana fruit abnormal ripening and the expression of ten genes associated with the ethylene-signalling pathway, namely MaACS1, MaACO1, MaERS1-4 and MaEIL1-4, at high temperature. Changes in these parameters of banana fruit at high temperature in response to 1-MCP pretreatment were also investigated.
  
  
  RESULTS
  High temperature accelerated the decline in fruit firmness, increased ethylene production and inhibited degreening in banana fruit, resulting in fruit abnormal ripening. In addition, the expression of MaACS1, MaACO1, MaERS2, MaERS3, MaERS4, MaEIL1, MaEIL3 and MaEIL4 was enhanced in banana fruit stored at high temperature. However, application of 1-MCP prior to high temperature storage delayed fruit abnormal ripening and simultaneously suppressed the expression of MaACS1, MaERS2, MaERS3, MaEIL1, MaEIL3 and MaEIL4.
  
  
  CONCLUSIONS
  The findings of this study suggested that the expression of genes associated with the ethylene-signalling pathway might be involved in banana fruit abnormal ripening at high temperature. Application of 1-MCP suppressed the expression of genes associated with the ethylene-signalling pathway, which may be attributed at least partially to 1-MCP delaying fruit abnormal ripening at high temperature.
authors.affiliation: Guangdong Key Laboratory for Postharvest Science, College of Horticultural Science, South China Agricultural University, Guangzhou 510642, China.
authors.forename: Su-Cheng
authors.initials: SC
authors.lastname: Yan
authors.forename: Jian-Ye
authors.initials: JY
authors.lastname: Chen
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Yu
authors.forename: Jian-Fei
authors.initials: JF
authors.lastname: Kuang
authors.forename: Wei-Xin
authors.initials: WX
authors.lastname: Chen
authors.forename: Xue-Ping
authors.initials: XP
authors.lastname: Li
authors.forename: Wang-Jin
authors.initials: WJ
authors.lastname: Lu
mesh_terms: D003521:Cyclopropanes / Q000494:pharmacology; D005030:Ethylenes / Q000378:metabolism*; D005638:Fruit / Q000378:metabolism*; D015870:Gene Expression; D017343:Genes, Plant; D006358:Hot Temperature; D028521:Musa / Q000235:genetics* / Q000378:metabolism; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics
chemical_list: D003521:Cyclopropanes; D005030:Ethylenes; D010940:Plant Proteins; C021985:cyclopropene; C036216:ethylene