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Respiratory oxygen response and respiratory quotient of apple stem sections during chilling.

Author(s) : YOUNG E.

Type of article: Article

Summary

During natural leaf abscission, 2-year-old potted apple trees (Malus domestica Borkh. cv. MM.111 EMLA) were placed in a room at 6 deg C for chilling (0, 600, 900 or 1400 chilling units). After each chilling treatment, respiration of shoot segments was measured as CO2 evolved and O2 consumed at 22 deg C in several O2 concentrations. Respiration increased with oxygen concentration after all chilling units treatments. Carbon dioxide evolved at the several O2 levels did not show a pattern related to chilling units, but O2 consumed decreased at a decreasing rate with additional chilling units. Respiratory quotient was lower than 1 at 0 and 600 chilling units and equal to 1 at 900 and 1400 chilling units, indicating a possible shift in respiratory substrate with chilling.

Details

  • Original title: Respiratory oxygen response and respiratory quotient of apple stem sections during chilling.
  • Record ID : 1994-0939
  • Languages: English
  • Source: J. am. Soc. hortic. Sci. - vol. 118 - n. 4
  • Publication date: 1993/07
  • Document available for consultation in the library of the IIR headquarters only.

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