Differences in the etioplast ultrastructure and chlorophyll biosynthesis time course of cold tolerant and cold sensitive maize lines under cold treatment

B. Böddi, Á Keresztes, B. Csapó, J. Kovács, E. Páldi, F. Láng

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

For a better understanding of the origin of different cold stress responses of certain maize lines, low-temperature fluorescence spectroscopy and electron microscopy was done on dark-grown and illuminated leaves. The plants of both lines were grown in darkness at 25°C for 7 days, then kept at 12°C for 6 hours. After cutting out non-illuminated samples from the leaves, other groups of leaf segments were illuminated by two consecutive light flashes and samples were taken after different time periods of darkness at 12°C. For comparison, the same procedure was done keeping the plants at 25°C during the whole run of the experiment. An analysis of the low-temperature fluorescence spectra of the leaves showed a difference between the cold sensitive and cold tolerant lines at 12°C, but not at 25°C, in respect of the relative amounts of the protochlorophyllide forms. After illumination, a delay in the Shibata-shift was found in the cold sensitive line at 12°C. Electron microscopy showed differences in prolamellar body disintegration, depending on the cold sensitivity and the applied temperature.

Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalMaydica
Volume42
Issue number3
Publication statusPublished - Dec 15 1997

Keywords

  • Cold sensitivity
  • Electron microscopy
  • Etioplast
  • Fluorescence emission spectroscopy
  • Maize lines
  • Phototransformation
  • Prolamellar body
  • Protochlorophyllide
  • Shibata-shift
  • Zea mays L.

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

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