Skip to main content
NCBI home page
Plant Physiology logoLink to Plant Physiology
. 1983 Jan;71(1):67–70. doi: 10.1104/pp.71.1.67

Metabolism of Oat Leaves during Senescence 1

VII. The Interaction of Carbon Dioxide and Other Atmospheric Gases with Light in Controlling Chlorophyll Loss and Senescence

Sergio O Satler 1,2, Kenneth V Thimann 1
PMCID: PMC1065987  PMID: 16662800

Abstract

In air largely freed from CO2, senescence of isolated oat (Avena sativa cv Victory) seedling leaves is no longer prevented by white light; instead, the leaves lose both chlorophyll and protein as rapidly as in the dark. Senescence in light is also accelerated in pure O2, but it is greatly delayed in N2; 100% N2 preserves both protein and chlorophyll in light and in darkness. In light in air, most of the compounds tested that had previously been found to delay or inhibit senescence in darkness actually promote the loss of chlorophyll, but they do not promote proteolysis. Under these conditions, proteolysis can therefore be separated from chlorophyll loss. But in light minus CO2, where chlorophyll loss is rapid in controls, two of these same reagents prevent the chlorophyll loss. Unlike the many reagents whose action in light is thus the opposite of that in darkness, abscisic acid, which promotes chlorophyll loss in the dark, also promotes it in light with or without CO2. Kinetin, which prevents chlorophyll loss in the dark, also prevents it in light minus CO2. In general, therefore, the responses to light minus CO2 are similar to the responses to darkness, and (with the exception of abscisic acid and kinetin) opposite to the response to light in air.

Full text

PDF
67

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Aharoni N., Lieberman M. Ethylene as a regulator of senescence in tobacco leaf discs. Plant Physiol. 1979 Nov;64(5):801–804. doi: 10.1104/pp.64.5.801. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Choe H. T., Thimann K. V. The Metabolism of Oat Leaves during Senescence: III. The Senescence of Isolated Chloroplasts. Plant Physiol. 1975 May;55(5):828–834. doi: 10.1104/pp.55.5.828. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Gepstein S., Thimann K. V. The role of ethylene in the senescence of oat leaves. Plant Physiol. 1981 Aug;68(2):349–354. doi: 10.1104/pp.68.2.349. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Humble G. D., Hsiao T. C. Light-dependent Influx and Efflux of Potassium of Guard Cells during Stomatal Opening and Closing. Plant Physiol. 1970 Sep;46(3):483–487. doi: 10.1104/pp.46.3.483. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Kanemasu E. T., Thurtell G. W., Tanner C. B. Design calibration and field use of a stomatal diffusion porometer. Plant Physiol. 1969 Jun;44(6):881–885. doi: 10.1104/pp.44.6.881. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Kotaka S., Krueger A. P. Some observations on the bleaching of ethylenediaminetetraacetic acid on green barley leaves. Plant Physiol. 1969 Jun;44(6):809–815. doi: 10.1104/pp.44.6.809. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Satler S. O., Thimann K. V. The influence of aliphatic alcohols on leaf senescence. Plant Physiol. 1980 Sep;66(3):395–399. doi: 10.1104/pp.66.3.395. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. THIMANN K. V., YOCUM C. S., HACKETT D. P. Terminal oxidases and growth in plant tissues. III. Terminal oxidation in potato tuber tissue. Arch Biochem Biophys. 1954 Nov;53(1):239–257. doi: 10.1016/0003-9861(54)90249-0. [DOI] [PubMed] [Google Scholar]
  9. Thimann K. V., Satler S. O. Relation between leaf senescence and stomatal closure: Senescence in light. Proc Natl Acad Sci U S A. 1979 May;76(5):2295–2298. doi: 10.1073/pnas.76.5.2295. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Thimann K. V., Tetley R. M., Krivak B. M. Metabolism of Oat Leaves during Senescence: V. Senescence in Light. Plant Physiol. 1977 Mar;59(3):448–454. doi: 10.1104/pp.59.3.448. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Thomas H., Stoddart J. L. Separation of Chlorophyll Degradation from Other Senescence Processes in Leaves of a Mutant Genotype of Meadow Fescue (Festuca pratensis L.). Plant Physiol. 1975 Sep;56(3):438–441. doi: 10.1104/pp.56.3.438. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Widholm J. M., Ogren W. L. Photorespiratory-induced senescence of plants under conditions of low carbon dioxide. Proc Natl Acad Sci U S A. 1969 Jul;63(3):668–675. doi: 10.1073/pnas.63.3.668. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Plant Physiology are provided here courtesy of Oxford University Press

RESOURCES