The role of alternative cyanide-insensitive respiration in plants. Final report Metadata

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Title

  • Main Title The role of alternative cyanide-insensitive respiration in plants. Final report

Creator

  • Author: Raskin, Ilya
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Office of Energy Research.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Energy Research (ER) (United States)

Publisher

  • Name: Rutgers Univ., Piscataway, NJ (United States)
    Place of Publication: United States

Date

  • Creation: 1997-09-29

Language

  • English

Description

  • Content Description: This DOE funded research concentrated on the investigation of the role of respiration and oxidative stress in plant biology. Initially the authors concentrated on the possible role of cyanide-insensitive respiration in counteracting the deleterious effects of chilling stress. Although plants are considered to be poikilotherms, there are a few examples of thermogenesis, in which the tissue temperature increases well above ambient. They suggested that differences between thermogenic and non-thermogenic plants may be quantitative rather than qualitative, and that heat from increased respiration may have a local protective effect on the mitochondria, slowing or reducing the effects of chilling. They proposed that this is accomplished by a large increase in respiration, predominantly via the alternative pathway. They measured the increases in respiration, particularly via the alternative pathway, in response to chilling. They have also quantified the associated increases in heat evolution in response to chilling in a number of plant species using a microcalorimeter. For example, after 8 h exposure to 8 C, heat evolution in chilling-sensitive species increased 47--98%, compared to 7--22% for the chilling-resistant species. No increase in heat evolution was observed in the extremely chilling-sensitive ornamental Episcka cupreata (Hook). Increases in heat evolution were observed when plants were chilled in constant light or in the dark, but not when plants were chilled at high humidity. Heat evolution by mitochondria isolated from potato tuber slices were also measured. These values, together with measurements of the heat capacity of isolated mitochondria and counting of the mitochondria by flow cytometry, allow calculation of theoretical maximal rates of heating and the heat produced per mitochondrion. The obtained data was consistent with the protective role of respiratory heat production in cold-stressed plants.
  • Physical Description: 3 p.

Subject

  • Keyword: Plants
  • Keyword: Respiration
  • STI Subject Categories: 63 Radiation, Thermal, And Other Environmental Pollutant Effects On Living Organisms And Biological Materials
  • Keyword: Heat
  • Keyword: Ambient Temperature
  • Keyword: Temperature Dependence
  • Keyword: Biological Stress
  • Keyword: Biological Pathways

Source

  • Other Information: PBD: 29 Sep 1997

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Grant Number: FG02-94ER20163
  • DOI: 10.2172/755431
  • Office of Scientific & Technical Information Report Number: 755431
  • Archival Resource Key: ark:/67531/metadc701931

Note

  • Display Note: OSTI as DE00755431
  • Display Note: Medium: P; Size: 3 pages
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