Vpliv obrasti na optične lastnosti vodnih listov prave potočarke in navadne streluše

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Language:	Slovenian
Year of publishing:	2013
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL PEF - Faculty of Education
Publisher:	[V. Oražem]
UDC:	581.5(043.2)
COBISS:	9642825
Views:	832
Downloads:	219
Average score:	0 (0 votes)
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Secondary language:	English
Secondary title:	The effects of periphyton on optical properties of submerged leaves in Rorippa amphibia and Sagittaria sagittifolia
Secondary abstract:	We studied the effects of periphyton on optical properties of the leaves of the species Rorippa amphibia and Sagittaria sagittifolia. Leaf reflectance and transmittance were measured. Morphological research included the measurements of specific leaf area, leaf thickness (upper and lower epidermis, mesophyll), the number of stomata and the presence of diatoms on upper and lower side of the leaves. Biochemical analyses included measurements of concentrations of chlorophyll a and b, carotenoides, anthocianins, UV-A and UV-B absorbing substances. We also measured concentrations of chlorophyll in periphyton. We can conclude that all biochemical parameters, stomata and diatom density, SLA and leaf thickness affected leaf reflectance and transmittance. Mesophyll thickness affected the reflectance, while periphyton presence affected mainly leaf transmittance in both studies species.
Secondary keywords:	botany;botanika;
File type:	application/pdf
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. Ljubljana, Pedagoška fak., Biotehniška fak., Biologija in gospodinjstvo
Pages:	XI, 56 f.
Type (ePrints):	thesis
Title (ePrints):	The effects of periphyton on optical properties of submerged leaves in Rorippa amphibia and Sagittaria sagittifolia
Keywords (ePrints):	navadna streluša
Keywords (ePrints, secondary language):	R. amphibia
Abstract (ePrints):	Preučevali smo vpliv obrasti na optične lastnosti listov prave potočarke in navadne streluše. Merili smo listno odbojnost in presevnost ter specifično listno površino, debelino lista in posameznih tkiv (zg. in sp. povrhnjica, mezofil), gostoto listnih rež in prisotnost diatomej na zgornji in spodnji strani lista. Biokemijske analize so obsegale meritve vsebnosti klorofilov a in b, karotenoidov, antocianov in UV–A in –B absorbirajočih snovi. V odstranjeni obrasti smo izmerili vsebnost klorofila a. V raziskavi smo ugotovili, da na listno odbojnost in presevnost vplivajo vsi biokemijski parametri, gostota diatomej in listnih rež, SLA in debelina lista. Na odbojnost vpliva tudi debelina mezofila. Prisotnost obrasti vpliva predvsem na listno presevnost obeh vrst.
Abstract (ePrints, secondary language):	We studied the effects of periphyton on optical properties of the leaves of the species Rorippa amphibia and Sagittaria sagittifolia. Leaf reflectance and transmittance were measured. Morphological research included the measurements of specific leaf area, leaf thickness (upper and lower epidermis, mesophyll), the number of stomata and the presence of diatoms on upper and lower side of the leaves. Biochemical analyses included measurements of concentrations of chlorophyll a and b, carotenoides, anthocianins, UV-A and UV-B absorbing substances. We also measured concentrations of chlorophyll in periphyton. We can conclude that all biochemical parameters, stomata and diatom density, SLA and leaf thickness affected leaf reflectance and transmittance. Mesophyll thickness affected the reflectance, while periphyton presence affected mainly leaf transmittance in both studies species.
Keywords (ePrints, secondary language):	R. amphibia
ID:	8311402