Interactive effects of 1-MCP, methyl jasmonate and CA storage on quality of ‘Fuji’ apple fruit
Argenta, Luiz, James Mattheis, Suetong Fan and Marcelo Vieira
Program and Abstract. 9th Controlled Atmosphere Research Conference (CA2005). Michigan State University, East Lansing, Michigan, USA. July 5-10, 2005. page27
2005
บทคัดย่อ
Interactive effects of 1-MCP, methyl jasmonate and CA storage on quality of ‘Fuji’ apple fruit
The present study evaluated how post-harvest treatment with 1-methylcyclopropene (1-MCP) and methyl jasmonate (MJ) affect responses of ‘Fuji’ apple fruit to CA storage conditions. ‘Fuji’ apples were harvested one week after optimum maturity for long-tern storage from commercial orchard in north central Washington (seasons one and two) and from 4 commercial orchards in Santa Catarina, Brazil (season three). Fruit were cooled to 0.5°C within 24 h of harvest and then stored in air or controlled atmosphere (CA). Fruit from season one were stored in CA with 2 kPa O2 + 0.05 kPa CO2; 0.25 kPa O2 + 0.05 kPa CO2 or 2 kPa O2 + 3 kPa CO2 for 6 months. Fruit from seasons two and three were stored in CA with 1.5 kPa O2 + 0.05 kPa CO2 or 1.5 kPa O2 + 3 kPa CO2 for 8 months as a rapid CA (established within 72 h of harvest) or a delayed CA (established after 2, 3, 4 or 6 weeks of harvest). In addition, CO2 levels in low CO2-CA (1.5 kPa O2-0.05 kPa CO2) were increased to 3 kPa after 1, 2or 3 months of harvest. Fruit were treated with 1 mM MJ or 1 mL L-1 1-MCP at harvest. Both CA conditions and 1-MCP treatment reduced ethylene production, improved maintenance of firmness and titratable acidity and reduced incidence of scald and core flush during long-tern storage compared with untreated fruit stored in air. 1-MCP treatment was as or more effective as low CO2-CA storage for reducing ethylene production and preservation of firmness and acidity in ‘Fuji’ apples depending on season and/or storage period. ‘Fuji’ apples stored in 3 kPa CO2 developed internal browning (CO2-injury) while fruit stored in 0.25 kPa O2, 0.05 kPa CO2 or air did not, regardless of 1-MCP treatment. There were no significant impacts of 1-MCP treatment on development of CO2-injury in air or rapid CA-stored fruit from Washington, while 1-MCP treatment enhanced incidence and severity of CO2 injury in rapid CA-stored fruit from Brazil. MJ treatment reduced severity of CO2-injury. Delaying CA (1.5 kPa O2 + 3 kPa CO2) or CO2(3 kPa) accumulation during CA reduced the incidence of CO2-injury. However, CA and CO2delay procedures were less effective on prevention of CO2-injury for fruit treated with 1-MCP compared with untreated fruit regardless of orchard and region. Results indicate that 1-MCP treatment increased CO2 injury sensitivity in the earlier period of storage when ‘Fuji’ apples are more susceptible to CO2-injury.