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Accumulated attendance and fourth-derivative spectra were measured using intact leaf samples at mom temperature for 80 genotypes of four  Fragaria  species. Attendance peak wavelength and amplitude data of all samples was pooled and yielded 25 common bands for  Fragaria.  Of these, 14 chlorophyll bands and two phototransformed bands were consistent with French's (1972) model.  Peak wavelengths and amplitudes which represent major bands in  F. chiloensis  and  F.  ×  ananassa  spectra were also determined separately. While peak wavelengths of the two species were identical, variation was noted in peak amplitude. The signals of the bands at Cb640, Cb649, Ca670, Ca673, Ca675-676, Ca684 and Ca693 in  F. chiloensis  were significantly stronger than those in  F.  ×  ananassa.  Ca677 and Ca695 were stronger in  F.  ×  ananassa.   The greatest difference among  Fragaria  species was found in the amplitude of Ca693. The amplitude of this peak was greatest in  F. chi/oensis  (0.0025) and smallest in  F. virginiana  (-0.0005), The cultivated hybrid of these two species,  F.  ×  ananassa,  was intermediate (0.0008), Preliminary evidence suggests that certain genotype-specific spectral characteristics may relate directly to observed differences in photosynthetic biology among these species.

VARIABILITY IN FOURTH DERIVATIVE LEAF SPECTROSCOPY OF FRAGARIA SPP. AND ITS RELATIONSHIP TO PHOTOSYNTHESIS