Abstract
While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production just before veraison is required for an increase in berry size and possibly for anthocyanin accumulation in the ripening berry. Our data also show that the peak of ethylene production just prior to veraison is associated with increased accumulation of ACC oxidase mRNAs, enhanced ACC oxidase activity and higher concentrations of malonyl-ACC. Exposure of clusters to 1-MCP at various times before and after veraison inhibited ripening only in fruit treated at the time of the ethylene peak. Lastly, we observed some feed-back at the ethylene perception level and this response is discussed in relationship to the behaviour of non-climacteric plant tissues.
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Claims 7
Claim · model-written summary
Endogenous ethylene before veraison is required for berry size increase.
Verbatim
e0“endogenous ethylene production just before veraison is required for an increase in berry size”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
Endogenous ethylene may be required for anthocyanin accumulation.
Verbatim
e0“possibly for anthocyanin accumulation in the ripening berry”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
The ethylene peak before veraison coincided with increased ACC oxidase mRNA accumulation.
Verbatim
e0“the peak of ethylene production just prior to veraison is associated with increased accumulation of ACC oxidase mRNAs”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
The ethylene peak before veraison coincided with enhanced ACC oxidase activity.
Verbatim
e0“the peak of ethylene production just prior to veraison is associated with increased accumulation of ACC oxidase mRNAs, enhanced ACC oxidase activity”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
The ethylene peak before veraison coincided with higher malonyl-ACC concentrations.
Verbatim
e0“the peak of ethylene production just prior to veraison is associated with increased accumulation of ACC oxidase mRNAs, enhanced ACC oxidase activity and higher concentrations of malonyl-ACC”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
1-MCP inhibited ripening when applied at the ethylene peak.
Verbatim
e0“Exposure of clusters to 1-MCP at various times before and after veraison inhibited ripening only in fruit treated at the time of the ethylene peak”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
Claim · model-written summary
An ethylene-perception feedback response was observed.
Verbatim
e0“we observed some feed-back at the ethylene perception level”
e1“While grapes have been classified as a non-climacteric fruit, we show here that endogenous ethylene production”
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