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Action spectra for chlorophyll formation during greening of wheat leaves in continuous light
Author(s) -
Virgin Hemming I.
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb02420.x
Subject(s) - greening , phytochrome , action spectrum , chlorophyll , chlorophyll a , wavelength , chemistry , botany , biology , red light , physics , optics , ecology
The contents of Chl a and Chl b in dark‐grown leaves of wheat ( Triticum aestivum L. cv. Starke II, Weibull) irradiated for 20 h with light of different wavelengths and intensities have been measured. The amount of Chl b formed revealed a higher maximum in the Chl b /Chl a ratio for light most strongly absorbed by the phytochrome system and giving a high [P fr ]/[P tot ] ratio. This indicates a stronger enhancing effect of P fr on Chl b formation than on Chl a formation. Similarities between action spectra for Chl a and b formation indicate that Chl b originates from Chl a . A comparatively high effectiveness of light within the wavelength range 500–550 nm as compared to the action spectrum for PChl→Chl phototransformation shows that PChl 636 , in addition to PChl 650 , takes part in the greening process.