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Acute morphological changes of palisade cells ofSaintpaulia leaves induced by a rapid temperature drop


Early changes in fine structures of intracellular organelles ofSaintpaulia leaves exhibiting chilling-induced degeneration of photosynthetic activities were investigated by electron microscopy. As early as 3 min after exposure to 10C water, thylakoid lamellae in the palisade cells showed extensive disarrangement, especially in intergrana lamellae. Simultaneously, other organelles showed drastic morphological changes, including the condensation of chromatin in the nucleus.

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Yun, J.G., Hayashi, T., Yazawa, S. et al. Acute morphological changes of palisade cells ofSaintpaulia leaves induced by a rapid temperature drop. J. Plant Res. 109, 339–342 (1996).

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Key words

  • Chilling injury
  • Electron microscope
  • Leaf spot
  • Palisaide cell
  • Saintpaulia