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Regulation of ethylene biosynthesis in climacteric apple fruit by elevated CO2 and reduced O2 atmospheres.

Author(s) : GORNY J. R., KADER A. A.

Type of article: Article

Summary

1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACC-S) activity and oxidase (ACC-O) activity of fruit held in atmospheres of air, air + 20% CO2 or 0.25% O2 were similar when the assays were performed. Because the atmosphere of 0.25% O2 has a dual mode of action in reducing ethylene biosynthesis (i.e. reduced ACC-O activity and reduced in vitro ACC-S enzyme activity), storage of apple fruit in 0.25% O2 was more effective in suppressing ethylene biosynthesis, than storage in air + 20% CO2. Inhibition of ethylene biosynthesis by elevated CO2 atmospheres in apple fruit that do not yet have the capacity to produce autocatalytic ethylene may indeed be due to reduced induction of ACC-O activity. However, our data indicate that the mode of action of elevated CO2 atmospheres in reducing ethylene biosynthesis in climacteric apple fruit is by reducing ACC-S activity.

Details

  • Original title: Regulation of ethylene biosynthesis in climacteric apple fruit by elevated CO2 and reduced O2 atmospheres.
  • Record ID : 1997-3373
  • Languages: English
  • Source: Postharvest Biol. Technol. - vol. 9 - n. 3
  • Publication date: 1996/12

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