Russian Journal of Plant Physiology

, Volume 52, Issue 5, pp 591–595 | Cite as

Tissue-Specific Features of Pigment Biogenesis in Coleoptiles of Greening Etiolated Seedlings of Cereals

  • G. E. Savchenko
  • E. A. Klyuchareva
  • L. F. Kabashnikova


Biogenesis of the pigment apparatus was studied in coleoptiles of postetiolated barley seedlings (Hordeum vulgare L.) and triticale (Triticale), differing in chlorophyll content, during growing in a “ light-darkness” regime with a 16-h photoperiod. Photoactive protochlorophyllide with a fluorescence maximum at 655 nm (Pchlide655), which accumulates in coleoptiles of etiolated seedlings, was converted in the light into a chlorophyll pigment with a fluorescence maximum at 690 nm (excitation at 440 nm, temperature −196°C). The spectral transition 690 nm → 675 nm forms was completed in darkness for 15 min illumination. There was almost no resynthesis of new portions of Pchlide655 in coleoptiles under darkness conditions, even after a 5–6-h darkness period after brief illumination of seedlings with flashes of white light. Chlorophyllide (Chlide) formed from Pchlide655 was not esterified and was destroyed both in the light (4 h, 1.0–1.5 klx) and darkness. In coleoptiles of greening etiolated seedlings, chlorophyll formation started only by 24 h of illumination. The instability of the chlorophyll pigment formed after etiolation indicates that plastids of coleoptiles do not contain the system of chlorophyll biosynthesis centers typical of leaves, which are bound to membranes and protect pigment from destruction.

Key words

Hordeum vulgare Triticale coleoptile leaf etiolation greening protochlorophyllide and its forms chlorophyllide 



5-aminolevulinic acid






protochlorophyllide oxidoreductase


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Copyright information

© MAIK "Nauka/Interperiodica" 2005

Authors and Affiliations

  • G. E. Savchenko
    • 1
  • E. A. Klyuchareva
    • 1
  • L. F. Kabashnikova
    • 1
  1. 1.Institute of Biophysics and Cell EngineeringNational Academy of Sciences of BelarusMinskBelarus

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