Optične lastnosti listov vrste iz skupine močvirske spominčice in vodnega jetičnika

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Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[L. Bartha]
UDC:	581.5(043.2)
COBISS:	9829449
Views:	813
Downloads:	154
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	Leaf optical properties in Myosotis scorpioides agg. and Veronica anagallis-aquatica
Secondary abstract:	The purpose of the thesis was to examine optical properties of two amphibious plants – Myosotis scorpioides agg. and Veronica anagallis-aquatica. We studied morphological and biochemical properties of leaves and measured reflectance and transmittance spectra. We analysed ten aquatic and ten terrestrial samples of leaves of both species and made the comparison among them. Leaf reflectance and transmittance were measured in the range between 280 and 824 nm. Leaf mass per area, density and size of leaf stomata and trichomes were determined. Leaf structure was analysed and contents of chlorophyll, carotenoid, anthocyanin and UV-absorbing substances were measured. The results showed differences in reflectance and transmittance spectra. In leaves of aquatic plants we detected higher transmittance levels. Terrestrial form of M. scorpioides agg. and aquatic form of V. anagallis-aquatica had higher reflectance in the most of the spectrum range. Optical properties are influenced by the most biochemical and morphological factors mostly negatively correlated with leaf transmittance and reflectance spectra. Most of the relations between leaf properties and reflectivity were obtained by UV, yellow and red range of the spectrum, while the transmittance is typical for the whole spectrum.
Secondary keywords:	botany;botanika;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. Ljubljana, Pedagoška fak., Biotehniška fak., Biologija in gospodinjstvo
Pages:	XV f., 51 str., [2] f. pril.
Type (ePrints):	thesis
Title (ePrints):	Leaf optical properties in Myosotis scorpioides agg. and Veronica anagallis-aquatica
Keywords (ePrints):	odbojnos
Keywords (ePrints, secondary language):	reflectance
Abstract (ePrints):	Namen diplomskega dela je raziskati optične lastnosti listov dveh vrst z amfibijskim značajem, vrste iz skupine močvirske spominčice (Myosotis scorpioides agg.) in vodnega jetičnika (Veronica anagallis-aquatica). Preučili smo morfološke in biokemijske lastnosti listov ter izmerili njihovo odbojnost in presevnost. Pri preučevanih rastlinah smo analizirali po 10 vzorcev vodnih in 10 vzorcev kopenskih rastlin ter jih primerjali. Odbojnost in presevnost listov smo izmerili v območju med 280 nm in 824 nm valovne dolžine, izračunali specifično listno površino in vsebnost vode, gostoto in velikost listnih rež ter trihomov. Analizirali smo zgradbo lista v prečnem prerezu. V listih smo določili tudi vsebnost klorofilov, karotenoidov, antocianov in UV-absorbirajočih snovi. Rezultati so pokazali razlike v odbojnih in presevnih spektrih, pri čemer imajo vodne oblike obeh vrst višjo presevnost. Odbojnost v večjem delu spektra je višja pri kopenski obliki močvirske spominčice in vodni obliki vodnega jetičnika. Na optične lastnosti vpliva večina biokemijskih in morfoloških dejavnikov, ki so s presevnimi ter odbojnimi spektri večinoma negativno povezani. Največ značilnih povezav med lastnostmi lista in odbojnostjo smo dobili z UV, rumenim in rdečim delom spektra, medtem ko so bile povezave za presevnost značilne za celoten spekter.
Abstract (ePrints, secondary language):	The purpose of the thesis was to examine optical properties of two amphibious plants – Myosotis scorpioides agg. and Veronica anagallis-aquatica. We studied morphological and biochemical properties of leaves and measured reflectance and transmittance spectra. We analysed ten aquatic and ten terrestrial samples of leaves of both species and made the comparison among them. Leaf reflectance and transmittance were measured in the range between 280 and 824 nm. Leaf mass per area, density and size of leaf stomata and trichomes were determined. Leaf structure was analysed and contents of chlorophyll, carotenoid, anthocyanin and UV-absorbing substances were measured. The results showed differences in reflectance and transmittance spectra. In leaves of aquatic plants we detected higher transmittance levels. Terrestrial form of M. scorpioides agg. and aquatic form of V. anagallis-aquatica had higher reflectance in the most of the spectrum range. Optical properties are influenced by the most biochemical and morphological factors mostly negatively correlated with leaf transmittance and reflectance spectra. Most of the relations between leaf properties and reflectivity were obtained by UV, yellow and red range of the spectrum, while the transmittance is typical for the whole spectrum.
Keywords (ePrints, secondary language):	reflectance
ID:	8311840