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Optical properties of Salix rosmarinifolia L. leaves

Urša Malovrh (2016) Optical properties of Salix rosmarinifolia L. leaves. Diploma thesis.

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    Abstract

    I was studying the influence of anatomy and biochemical properties of leaves on their optical properties in the Salix rosmarinifolia species. I found out that increased reflectance is apparent on the abaxial (lower) epidermis, which is caused by different leaf structure and pigment content. Concerning the leaf anatomy, I found out that palisade mesophyll share is larger than that of spongy mesophyll. However, spongy mesophyll enables better light reflection and is thus more important as far as light passing through leaves is concerned. Due to the spongy mesophyll's proximity to the abaxial epidermis as compared to the palisade mesophyll, abaxial epidermis reflects more light. It was indicated that trichome density also influences optical properties. Due to considerable trichome density, light reflection is reduced on the abaxial epidermis. However, trichomes' role is not only light reflection, as they are also of key importance for warmth preservation (NIR – infrared radiation). I did not include stomata in my research, since measurement deviations were too high. As a key photosynthesis pigment, chlorophyll a is considered to be the most important of all chlorophyll structures, whereas other pigment roles (chlorophlyll b, carotenoids, anthocyanins and UV-absorbing substances) are primarily in protecting leaf tissue from environmental risks.

    Item Type: Thesis (Diploma thesis)
    Keywords: optical properties, Salix rosmarinifolia, reflectance, photosynthesis pigment, chlorophyll a, spongy mesophyll, palisade mesophyll, trichomes
    Number of Pages: 28
    Language of Content: Slovenian
    Mentor / Comentors:
    Mentor / ComentorsIDFunction
    izr. prof. dr. Alenka GaberščikMentor
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=search&base=50126&select=(ID=11210825)
    Institution: University of Ljubljana
    Department: Faculty of Education, Biotechnical Faculty
    Item ID: 3861
    Date Deposited: 04 Oct 2016 18:52
    Last Modified: 04 Oct 2016 18:52
    URI: http://pefprints.pef.uni-lj.si/id/eprint/3861

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