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Targeted quantitative profiling of metabolites and gene transcripts associated with 4-aminobutyrate (GABA) in apple fruit stored under multiple abiotic stresses

引用

Horticulture research 2018年第1期5卷 66-79页

作者： Carolyne J.Brikis Adel Zarei Greta Z.Chiu Kristen L.Deyman Jingyun Liu Christopher P.Trobacher Gordon J.Hoover Sanjeena Subedi jennifer r.deell Gale G.Bozzo Barry J.Shelp Department of Plant Agriculture University of GuelphGuelphOntarioN1G 2W1Canada Department of Mathematical Sciences Binghamton UniversityBinghamtonNY13902USA Ontario Ministry of Agriculture Food and Rural AffairsBox 5871283 Blueline Rd.at Highway 3SimcoeOntarioN3Y 4N5Canada

4-Aminobutyrate accumulates in plants under abiotic ***,targeted quantitative profiling of metabolites and transcripts was conducted to monitor glutamate-and polyamine-derived 4-aminobutyrate production and its subsequent catabolism to succinate or 4-hydroxybutyrate in apple(Malus x domestica Borkh.)fruit stored at 0°C with 2.5 kPa O2 and 0.03 or 5 kPa CO2 for 16 ***-temperature-induced protein hydrolysis appeared to be responsible for the enhanced availability of amino acids during early storage,and the resulting higher glutamate level stimulated 4-aminobutyrate levels more than *** CO2 increased the levels of polyamines,as well as succinate and 4-hydroxybutyrate,during early storage,and 4-aminobutyrate and 4-hydroxybutyrate over the longer *** of all of the genes likely involved in 4-aminobutyrate metabolism from glutamate/polyamines to succinate/4-hydroxybutyrate was induced in a co-ordinated ***2-regulated expression of apple GLUTAMATE DECArBOXYLASE 2,AMINE OXIDASE 1,ALDEHYDE DEHYDrOGENASE 10A8 and POLYAMINE OXIDASE 2 was evident with longer term *** suggested that respiratory activities were restricted by the elevated CO2/O2 environment,and that decreasing NAD+availability and increasing NADPH and NADPH/NADP+,respectively,played key roles in the regulation of succinate and 4-hydroxybutyate ***,these findings suggest that both transcriptional and biochemical mechanisms are associated with 4-aminobutyrate and 4-hydroxybutyrate metabolism in apple fruit stored under multiple abiotic stresses.

关键词： hydrolysis subsequent restricted

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