Molecular and General Genetics MGG

, Volume 225, Issue 3, pp 468–473

Cyclic temperature treatments of dark-grown pea seedlings induce a rise in specific transcript levels of light-regulated genes related to photomorphogenesis

  • Klaus Kloppstech
  • Beate Otto
  • Walter Sierralta

DOI: 10.1007/BF00261689

Cite this article as:
Kloppstech, K., Otto, B. & Sierralta, W. Molec. Gen. Genet. (1991) 225: 468. doi:10.1007/BF00261689


Dark-grown pea seedlings exposed to cyclic heat shocks or daily temperature changes undergo a morphogenetic development similar to that induced by far red light. The morphological changes observed include expansion of the leaves, shortening of the stems and opening of the hooks. Compared with control etioplasts, plastids of heat-treated seedlings are as large as fully mature chloroplasts and contain well developed, unstacked membranes. These morphogenetic changes correlate with elevated levels of SSU and LHCP mRNAs which, under these conditions, fluctuate in a circadian manner. In contrast, the ELIP mRNA remains under strict light control and shows circadian fluctuations only if the plants are exposed to a short period of illumination. We propose that periodic temperature changes, like light treatment, might serve as a ‘Zeitgeber’ signal for circadian rhythm. The data indicate a correlation between the existence of circadian oscillations and morphogenetic development.

Key words

Circadian rhythmHeat shockLightinductionPhytochrome



gene(s) coding for chlorophyll a/b binding protein


early light-inducible protein


chlorophyll a/b binding proteins


small subunit of ribulose-1,5-bisphosphate carboxylase (ssRuBPCase)

Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Klaus Kloppstech
    • 1
  • Beate Otto
    • 1
  • Walter Sierralta
    • 2
  1. 1.Institut für BotanikUniversität HannoverHannover 21Germany
  2. 2.Max-Planck-Institut für Experimentelle EndokrinologieHannoverGermany