Vpliv prahu na optične lastnosti listov pri bukvi

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Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[Ž. Grobelšek]
UDC:	581.5(043.2)
COBISS:	9654089
Views:	1048
Downloads:	390
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	ǂThe ǂinfluence of dust on optical properties of beech leaves
Secondary abstract:	We studied the influence of dust on optical properties of beech tree leaves (Fagus sylvatica L.). We were assessing the influence of dust particles at two locations in the vicinity of a quarry and compared it with the reference location. We measured the anatomical characteristics of the leaf (thickness, thickness of the cuticle, and of the lower and upper epidermis, and the thickness of the spongy and palisade tissue, specific leaf surface, the number and size of leaf stomata, the structure of the leaf). We also performed biochemical analyses, comparing the content of pigments (chlorophyll, carotenoids and anthocyanians) and UV-absorbing substances (UV-A and UV-B), and measured the reflection spectra of leaves covered with dust particles and of leaves where the dust particles were removed. We wanted to estimate the influence of dust particles on measured parameters and the relation of properties of leaves are related to the presence of dust. We also wanted to point out how dust cover affects reflectance spectra. The results showed that differences occur mainly in certain anatomical features, pigment content and reflectance, while in the amount of UV-absorbing substances the impact of dust was not detected. Redundancy analysis revealed that the most of variability of spectra was explained by structure of the leaf (the thickness of the palisade tissue and the specific leaf surface), as well as the amount of dust.
Secondary keywords:	botany;botanika;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. Ljubljana, Pedagoška fak., Biotehniška fak., Fak. za kemijo in kemijsko tehnologijo, Naravoslovnotehniška fak.
Pages:	XI, 50 f., [2] f. pril.
Type (ePrints):	thesis
Title (ePrints):	The influence of dust on optical properties of beech leaves
Keywords (ePrints):	optične lastnosti
Keywords (ePrints, secondary language):	optical properties
Abstract (ePrints):	Proučevali smo vpliv prahu na optične lastnosti listov bukve (Fagus sylvatica L.). Vpliv prašnih delcev smo ugotavljali na dveh lokacijah ob kamnolomu in ga primerjali z referenčno lokacijo. Primerjali smo anatomske značilnosti lista (debelino lista, debelino kutikule, debelino spodnje in zgornje povrhnjice ter debelino gobastega in stebričastega tkiva, specifično listno površino in število ter velikost listnih rež). Opravili smo tudi biokemijske analize in primerjali vsebnost barvil (klorofili, karotenoidi in antociani), UV-absorbirajočih snovi (UV-A- in UV-B-absorbirajoče snovi) ter izmerili odbojne spektre listov s prahom in tistih, katerim smo prah odstranili. Zanimalo nas je, kako se s količino prahu spreminjajo merjeni parametri ter kako so med seboj povezani prisotnost prahu, lastnosti listov in odbojni spektri. Rezultati so pokazali, da se razlike pojavljajo predvsem v določenih anatomskih značilnostih, vsebnosti barvil in odbojnosti, medtem ko pri UV-absorbirajočih snoveh vpliva prahu ni zaznati. Ugotovili smo tudi, da na odbojnost v največji meri vpliva struktura lista (debelina stebričastega tkiva in specifična listna površina) ter količina prahu.
Abstract (ePrints, secondary language):	We studied the influence of dust on optical properties of beech tree leaves (Fagus sylvatica L.). We were assessing the influence of dust particles at two locations in the vicinity of a quarry and compared it with the reference location. We measured the anatomical characteristics of the leaf (thickness, thickness of the cuticle, and of the lower and upper epidermis, and the thickness of the spongy and palisade tissue, specific leaf surface, the number and size of leaf stomata, the structure of the leaf). We also performed biochemical analyses, comparing the content of pigments (chlorophyll, carotenoids and anthocyanians) and UV-absorbing substances (UV-A and UV-B), and measured the reflection spectra of leaves covered with dust particles and of leaves where the dust particles were removed. We wanted to estimate the influence of dust particles on measured parameters and the relation of properties of leaves are related to the presence of dust. We also wanted to point out how dust cover affects reflectance spectra. The results showed that differences occur mainly in certain anatomical features, pigment content and reflectance, while in the amount of UV-absorbing substances the impact of dust was not detected. Redundancy analysis revealed that the most of variability of spectra was explained by structure of the leaf (the thickness of the palisade tissue and the specific leaf surface), as well as the amount of dust.
Keywords (ePrints, secondary language):	optical properties
ID:	8311431