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Light Reflectance by Leaflets of Pubescent, Normal, and Glabrous Soybean Lines 1
Author(s) -
Gausman H. W.,
Cardenas R.
Publication year - 1973
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1973.00021962006500050049x
Subject(s) - absorptance , reflectivity , wavelength , transmittance , diffuse reflection , visible spectrum , near infrared spectroscopy , optics , botany , biology , materials science , physics
The premise that hairy coverings on leaves diffuse and entrap incoming light was tested by comparing differences in spectrophotometrically measured reflectance, transmittance, and absorptance over the 500 to 2500‐nm wavelength interval among terminal leaflets of densely pubescent (hairy), normal (medium hairy), and glabrous (hairless) soybean [ Glycine max (L.) Merr.] lines. Upper (adaxial) surfaces of pubescent leaflets reflected less light (1.5%) than glabrous leaflets over the 750 to 1,350‐nm near‐infrared (IR) region. Pubescent leaflets absorbed 4.1% and glabrous leaflets absorbed 2.3% of the near‐IR light. Results suggest that leaf hairs diffuse and entrap incoming near‐IR light and thereby increase its absorptance and decrease its reflectance.