Short-term changes in spectral properties of phyllodes of brigalow (Acacia harpophylla F Muell Ex Benth) in response to wetting

Yates D.J. (1992) Short-term changes in spectral properties of phyllodes of brigalow (Acacia harpophylla F Muell Ex Benth) in response to wetting. Australian Journal of Botany, 40 1: 27-35. doi:10.1071/BT9920027


Author Yates D.J.
Title Short-term changes in spectral properties of phyllodes of brigalow (Acacia harpophylla F Muell Ex Benth) in response to wetting
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 1444-9862
Publication date 1992
Sub-type Article (original research)
DOI 10.1071/BT9920027
Volume 40
Issue 1
Start page 27
End page 35
Total pages 9
Subject 1110 Nursing
1105 Dentistry
Abstract The phyllodes of Acacia harpophylla (brigalow) possess a high reflectivity (0.20) in the visible wavelengths due to the presence of a dense covering of flattened trichomes. This results in a low value for phyllode absorptivity (0.79). While dry phyllodes appear grey-blue to the eye, wet phyllodes appear green and their reflection spectra are similar to those of ‘typical’ foliage elements. When wet, reflectivity in the visible wavelengths is reduced (0.09) and absorptivity is increased by 14%. Examination of the wetting and drying process, both visually and by measuring the time course of reflectivity, illustrates the importance of the wettable surfaces of both the epidermis and the individual trichomes. On drying, the reflectivity increase in the near infrared (NIR, 0.41-0.59) precedes that in the visible portion of the spectrum, although changes in the visible portion of the spectrum are larger than those in the NIR.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Tue, 14 Jun 2016, 03:35:08 EST by System User