Abstract
【Objective】The objective of this study is to investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit.【Method】 In this study,10 μmol?L-1 diphenylene iodonium(DPI),a NADPH oxidase specific inhibitor,was used to inhibit ROS generation in hot water treated fruits.After heat treatment(52℃ for 3 min),banana fruits were stored at 7℃.The chilling injury index,Fv/Fm,contents of H2O2 and,activities of catalase(CAT) and ascorbate peroxidase(APX),gene expressions of MaCAT and MaAPX genes were determined.【Result】Compared with heat-treated fruits,fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm,Moreover,DPI treatment prevented heat-triggered H2O2 and accumulation,and inhibited the increase of the activities of CAT and APX,and the expressions of MaCAT and MaAPX genes.【Conclusion】 It is suggested that pre-treatment with DPI prevented the rapid accumulation of ROS induced by heat treatment,which counteracted heat treatment-induced chilling tolerance accordingly had a negative effect on the chilling tolerance induced by heat treatment and showed serious chilling injury symptoms.The reactive oxygen species induced by heat treatment might serve as signal molecules involving in chilling resistance of banana fruits.
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Claims 6
Claim · model-written summary
DPI pretreatment before heat treatment increased the chilling injury index of banana fruit compared with heat-treated fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e1“Compared with heat-treated fruits, fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm”
Claim · model-written summary
DPI pretreatment before heat treatment lowered Fv/Fm of banana fruit compared with heat-treated fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e1“Compared with heat-treated fruits, fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm”
Claim · model-written summary
DPI treatment prevented the heat-triggered accumulation of H2O2 in banana fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e1“Compared with heat-treated fruits, fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm”
e2“DPI treatment prevented heat-triggered H2O2 and accumulation, and inhibited the increase of the activities of CAT and APX, and the expressions of MaCAT and MaAPX genes”
Claim · model-written summary
DPI treatment inhibited the heat-induced increase in CAT and APX activities in banana fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e1“Compared with heat-treated fruits, fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm”
e2“DPI treatment prevented heat-triggered H2O2 and accumulation, and inhibited the increase of the activities of CAT and APX, and the expressions of MaCAT and MaAPX genes”
Claim · model-written summary
DPI treatment inhibited the heat-induced increase in MaCAT and MaAPX gene expression in banana fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e1“Compared with heat-treated fruits, fruits treated with DPI prior to heat treatment exhibited higher chilling injury index and lower values of Fv/Fm”
e2“DPI treatment prevented heat-triggered H2O2 and accumulation, and inhibited the increase of the activities of CAT and APX, and the expressions of MaCAT and MaAPX genes”
Claim · model-written summary
Reactive oxygen species induced by heat treatment may act as signal molecules in chilling resistance of banana fruit.
Verbatim
e0“investigate the role of reactive oxygen species(ROS) in heat-induced chilling tolerance in banana fruit”
e4“The reactive oxygen species induced by heat treatment might serve as signal molecules involving in chilling resistance of banana fruits”
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