[After effect of heat shock on induction of fluorescence and low temperature fluorescence spectra of wheat leaves].
The dynamics of restoration of variable and millisecond delayed fluorescence of chlorophyll a, as well as low-temperature fluorescence spectra at 77 K in leaves of 11-day-old wheat seedlings subjected to heat shock (41.5 degrees C, 20 min) and cultivated for 4 days under white light of different intensity was investigated. A comparative analysis of changes in variable, delayed, and low-temperature fluorescence of chlorophyll a depending on light intensity and the proteolitic activity in leaf homogenates during the restoration of the seedlings was carried out. It follows from the data that the restoration of fluorescence includes several phases and is stimulated by light. A possible mechanism of restoration of fluorescence and photochemical activity of photosystem II is discussed.
Kreslavskiĭ
V D
VD
Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, 142290 Russia.
Khristin
M S
MS
D003080:Cold Temperature; D018869:Heat-Shock Response; D006868:Hydrolysis; D010860:Pigments, Biological / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry*; D010940:Plant Proteins / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D014908:Triticum / Q000737:chemistry*
D010860:Pigments, Biological; D010940:Plant Proteins