title: Evidences for Chlorogenic Acid--A Major Endogenous Polyphenol Involved in Regulation of Ripening and Senescence of Apple Fruit.
abstract: To learn how the endogenous polyphenols may play a role in fruit ripening and senescence, apple pulp discs were used as a model to study the influences of chlorogenic acid (CHA, a major polyphenol in apple pulp) on fruit ripening and senescence. Apple ('Golden Delicious') pulp discs prepared from pre-climacteric fruit were treated with 50 mg L(-1) CHA and incubated in flasks with 10 mM MES buffer (pH 6.0, 11% sorbitol). Compared to the control samples, treatment with CHA significantly reduced ethylene production and respiration rate, and enhanced levels of firmness and soluble solids content of the pulp discs during incubation at 25°C. These results suggested that CHA could retard senescence of the apple pulp discs. Proteomics analysis with sodium dodecyl sulfate-polyacrylamide gel electrophoresis and mass spectrometry (MALDI-TOF/TOF) revealed that the expressions of several key proteins correlated to fruit ripening and senescence were affected by the treatment with CHA. Further study showed that treating the pulp discs with CHA remarkably reduced levels of lipoxygenase, β-galactosidase, NADP-malic enzyme, and enzymatic activities of lipoxygenase and UDP-glucose pyrophosphorylase, all of which are known as promoters of fruit ripening and senescence. These results could provide new insights into the functions of endogenous phenolic compounds in fruit ripening and senescence.
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing 100083, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Xi
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing 100083, PR China.
authors.forename: Dai
authors.initials: D
authors.lastname: Cheng
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing 100083, PR China.
authors.forename: Xiangquan
authors.initials: X
authors.lastname: Zeng
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing 100083, PR China.
authors.forename: Jiankang
authors.initials: J
authors.lastname: Cao
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing 100083, PR China.
authors.forename: Weibo
authors.initials: W
authors.lastname: Jiang
mesh_terms: D002726:Chlorogenic Acid / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D005030:Ethylenes / Q000737:chemistry; D005638:Fruit / Q000502:physiology*; D008084:Lipoxygenase / Q000378:metabolism; D008291:Malate Dehydrogenase / Q000378:metabolism; D027845:Malus / Q000502:physiology*; D009249:NADP / Q000737:chemistry; D019800:Phenol / Q000737:chemistry; D059808:Polyphenols / Q000737:chemistry*; D040901:Proteomics; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013696:Temperature; D005957:UTP-Glucose-1-Phosphate Uridylyltransferase / Q000378:metabolism; D014530:Uridine Diphosphate / Q000737:chemistry; D001616:beta-Galactosidase / Q000378:metabolism
chemical_list: D005030:Ethylenes; D059808:Polyphenols; D002726:Chlorogenic Acid; D019800:Phenol; D009249:NADP; D014530:Uridine Diphosphate; C036216:ethylene; D008291:Malate Dehydrogenase; C031917:malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+); D008084:Lipoxygenase; D005957:UTP-Glucose-1-Phosphate Uridylyltransferase; D001616:beta-Galactosidase