Spektralne lastnosti listov izbranih vrst rastlin na Cerkniškem jezeru

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Language:	Slovenian
Year of publishing:	2012
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL PEF - Faculty of Education
Publisher:	[K. Uranič]
UDC:	581.5(043.2)
COBISS:	9502537
Views:	879
Downloads:	166
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	Leaf spectral properties of selected plant species in lake Cerknica
Secondary abstract:	We studied the spectral properties of leaves of four plant species. Measurements of anatomical, biochemical and optical properties of leaves were performed on plant species Molinia caerulea, Phalaris arundinacea, Phragmites australis and Carex elata. We measured specific leaf area, cuticule thickness and density and length of leaf stomata and trichomes. We determined pigments and UV-absorbing compounds and measured leaf reflectance within the range of 280 to 890 nm. We aimed to find out how anatomical, morphological and biochemical parameters affected reflectivity and which parameter exerted greater impact. We also determined which of the studied species differed among the species. The results have shown that reflectivity affected both biochemical and anatomical and morphological parameters. The biochemical parameters had a greater impact on the reflectance in the visible part of the spectrum, while morphological and anatomical parameters have a greater impact on UV- and IR- part of the spectrum. Pattern of reflectance spectra is the same in all species as a result of similar morphology, anatomy and biochemistry of leaves. The most different spectral properties were found when comparing Carex elata, which had a high reflectivity, and Phalaris arundinacea, which had low reflectivity and high absorption. We concluded that this was due to large differences in the levels of photosynthetic pigments, and leaf morphology and anatomy between the two species.
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., Kemija in biologija
Pages:	XII, 50 f., [2] f. pril.
Type (ePrints):	thesis
Title (ePrints):	Leaf spectral properties of selected plant species in lake Cerknica
Keywords (ePrints):	odbojni spektri
Keywords (ePrints, secondary language):	reflectance spectra
Abstract (ePrints):	Preučevali smo spektralne lastnosti listov štirih rastlinskih vrst. Meritve anatomskih, biokemijskih in optičnih lastnosti listov smo opravili na rastlinskih vrstah modra stožka (Molinia caerulea), pisana čužka (Phalaris arundinacea), navadni trs (Phragmites australis) in togi šaš (Carex elata). Izmerili smo specifično listno površino, debelino kutikule ter gostoto in dolžino listnih rež in trihomov. Določili smo vsebnost barvil in UV-absorbirajočih snovi ter izmerili odbojnost listov v območju med 280 in 890 nm. Želeli smo ugotoviti, v kakšni meri na odbojnost vplivajo anatomski, morfološki in biokemijski parametri in kateri imajo na odbojnost večji vpliv. Ugotavljali smo še katere od preučevanih vrst se najbolj razlikujejo. Rezultati so pokazali, da v povprečju na odbojnost skoraj v enaki meri vplivajo tako biokemijski kot anatomski in morfološki parametri. Razlike so le v tem, da imajo biokemijski parametri na odbojnost večji vpliv v vidnem delu spektra, morfološki in anatomski parametri pa v UV- in IR- delu spektra. Vzorec odbojnega spektra je bil pri vseh vrstah enak, kar je posledica podobne morfologije, anatomije in biokemije listov. Od naših preučevanih vrst pa se po spektralnih lastnostih najbolj razlikujeta togi šaš (Carex elata), ki ima visoko odbojnost in pisana čužka (Phalaris arundinacea), ki ima nizko odbojnost in visoko absorpcijo. Ugotovili smo, da je to posledica velike razlike v vsebnosti asimilacijskih barvil ter v morfologiji in anatomiji listov med tema dvema vrstama.
Abstract (ePrints, secondary language):	We studied the spectral properties of leaves of four plant species. Measurements of anatomical, biochemical and optical properties of leaves were performed on plant species Molinia caerulea, Phalaris arundinacea, Phragmites australis and Carex elata. We measured specific leaf area, cuticule thickness and density and length of leaf stomata and trichomes. We determined pigments and UV-absorbing compounds and measured leaf reflectance within the range of 280 to 890 nm. We aimed to find out how anatomical, morphological and biochemical parameters affected reflectivity and which parameter exerted greater impact. We also determined which of the studied species differed among the species. The results have shown that reflectivity affected both biochemical and anatomical and morphological parameters. The biochemical parameters had a greater impact on the reflectance in the visible part of the spectrum, while morphological and anatomical parameters have a greater impact on UV- and IR- part of the spectrum. Pattern of reflectance spectra is the same in all species as a result of similar morphology, anatomy and biochemistry of leaves. The most different spectral properties were found when comparing Carex elata, which had a high reflectivity, and Phalaris arundinacea, which had low reflectivity and high absorption. We concluded that this was due to large differences in the levels of photosynthetic pigments, and leaf morphology and anatomy between the two species.
Keywords (ePrints, secondary language):	reflectance spectra
ID:	8311156