20.500.12556/DKUM-68075 Fiziološke značilnosti vodne solate (Pistia stratiotes L.) vzdolž temperaturnega gradienta Physiological characteristics of water lettuce (Pistia stratiotes L.) along a temperature gradient Invazivnost tujih vrst je povezana z njihovimi ekofiziološkimi odzivi na nove stresne dejavnike. Pistia stratiotes je invazivna tropska rastlina, zato smo z rezultati magistrskega dela želeli ugotoviti njene fiziološke značilnosti vzdolž temperaturnega gradienta v mokrici Topla pri Prilipah. Strugo mokrice smo razdelili na 10 lokacij, ki so se razlikovale glede na temperaturo vode. Ugotavljali smo, katera temperatura vode je optimalna za največji prirast in najboljše možnosti za vegetativno razmnoževanje. Merili smo, kako sta fotokemična učinkovitost in vrednost klorofila v listu (vrednost SPAD) odvisni od temperature okolja. Rezultati meritev so pokazali, da je za P. stratiotes najoptimalnejša temperatura od 25 °C do 30 °C. Rastline pri nižjih temperaturah od 21 °C niso uspevale, prav tako so pri temperaturi nad 35 °C začele rumeneti. Temperatura vode vpliva tudi na temperaturo rozete, ki je enaka temperaturi vode, ter na temperaturo lista, ki je v povprečju za 1 °C hladnejši od temperature vode. Zraven temperature vode imajo velik vpliv tudi temperatura zraka, hranila in pH vode. S pomočjo testa kalivosti ugotavljamo, da se vrsta v mokrici Topla pri Prilipah ob razmnoževanju s stoloni, uspešno razmnožuje tudi s semeni, ki preživijo temperature pod 0 °C in skladiščenje v sedimentni semenski banki. Invasiveness of alien species is related to their eco-physiological responses to stressors. Pistia stratiotes is invasive tropical plant. With presented results from this master thesis we wanted to evaluate and determine the physiological characteristics of species along the temperature gradient in the backwater Topla near Prilipe. The backwater riverbed was divided into 10 locations, which differed according to water temperature. We assessed which water temperature is optimal for the best growth-rate and best vegetative reproduction. We measured how the chlorophyll a photochemical efficiency of the leaf and the greenness of leaf (SPAD value) depend on environment temperature. Results showed the optimum temperature is between 25 °C and 30 °C. Plants did not grow in temperatures below 21 °C, as well as above 35 °C, when they started to senescence. Water temperature impacted the rosette temperature, which were similar, and leaf temperature, which was approximately 1 °C cooler. Significant impact was shown also for the air temperature and nutrients and pH. Germination tests showed that besides vegetative reproduction also viable seeds are present, which survive temperatures below 0 °C and are present in the sediment seed bank. vodna solatA temperaturni gradient rast razmnoževanje fotokemična učinkovitost fluorescenca klorofila vrednosti SPAD kalitev Pistia stratiotes L. temperature gradient growth reproduction photochemical efficiency chlorophyll fluorescence SPAD value germination true true false [T. Urek] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-09-07 21:05:46 2017-09-27 12:27:19 2022-08-01 14:49:49 2019-07-11 16:40:57 2017 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 581.1+581.5(043.2) 23365640 URN:SI:UM:DK:BAADWEW6 MAG_Urek_Tina_2017.pdf MAG_Urek_Tina_2017.pdf 1 5B53AFAA1A970B17F080E489055BB8D8 2cd62aa4486a9ab90d873f1cadb1038acf0f52e8535726940f2e7dd801a44fc6 a92d3372-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/67741c00-cd2d-40e9-96a1-482264d61cac https://dk.um.si/Dokument.php?lang=slv&id=117400 Fakulteta za naravoslovje in matematiko 0 0 0