20.500.12556/RUL-172926 Vpliv mikroplastike na arbuskularno mikorizo Impact of microplastics on arbuscular mycorrhiza Namen diplomske naloge je bil raziskati vpliv mikroplastike na arbuskularno mikorizo (AM), predvsem z vidika stopnje kolonizacije in razpoložljivosti mineralnih hranil. Mikroplastika v tleh vpliva na njihove kemijske in fizikalne lastnosti, kar se nato odraža tudi na rasti rastlin in njihovi interakciji z arbuskularnimi mikoriznimi glivami (AMG). Mikroplastika pogosto zmanjša gostoto tal in spodbuja razvoj koreninskega sistema, kar glivam olajša dostop do rastlin ter poveča stopnjo mikorizne kolonizacije – v nekaterih primerih celo do osemkrat. Po drugi strani pa te spremembe vplivajo na morfologijo korenin in povečujejo njihovo absorpcijsko površino, kar vodi do zmanjšane kolonizacije korenin z AMG, saj postane rastlina manj odvisna od mikorizne simbioze. Učinki so sicer v veliki meri odvisni od vrste, oblike in kemijske sestave mikroplastike. Mikroplastika lahko nase veže tudi različna onesnaževala, kot so pesticidi, herbicidi in antibiotiki, kar dodatno ovira AM kolonizacijo. Vpliv ima tudi na biorazpoložljivost mineralnih rastlinskih hranil – v prisotnosti AMG se koncentracija fosforja v rastlinskem tkivu pogosto poveča, medtem ko je v odsotnosti mikorize pogosto zaznana zmanjšana vsebnost dušika, kalija, magnezija in žvepla v rastlini. Prisotnost AM je v več primerih omilila negativne vplive mikroplastike, kar kaže na pomembno zaščitno vlogo te simbioze. Analiza mikroplastike v tleh ostaja metodološko zahteven proces, saj doslej še ni razvitih standardiziranih metod, ki bi bile primerne za vse vrste vzorcev. To otežuje primerjavo rezultatov in poudarja potrebo po njihovi standardizaciji. The aim of this thesis was to investigate the impact of microplastics on arbuscluar mycorrhizae (AM), mainly in terms of colonisation rate and nutrient availability. Microplastics affect both the chemical and physical properties of soil, which in turn influences plant growth and their interactions with arbuscular mycorrhizal fungi. Microplastics often reduce soil density and stimulate the development of the root system, making it easier for fungi to access the plants and increasing the rate od mycorrhizal colonisation- in some cases up to eightfold. On the other hand, these changes alter root morphology, increasing the root uptake surface area. This leads to reduced colonisation of the roots by arbuscular mycorrhizal fungi (AMF), as the plant becomes less dependent on mycorrhizal symbiosis. These effects largely depend on the type, shape and chemical composition of the microplastics. Moreover, microplastics can also bind to various pollutants such as pesticides, herbicides and antibiotics, which further hinder mycorrhizal colonisation. Microplastics also affect mineral nutrient bioavailability – in the presence of AMF, phosphorus concentrations are often increased, while in the absence of mycorrhiza, reduced nitrogen, potassium, magnesium and sulphur are often detected. The presence of AMF has in several cases mitigated the negative effects of microplastics, indicating the important role of this symbiosis. The analysis of microplastics in soil remains a methodologically challenging process, as no standardised methods, suitable for all types of samples, have yet been developed. This makes it difficult to compare results and highlights the need for standardisation. mikroplastika mikoriza arbuskularna mikoriza microplastics mycorrhiza arbuscular mycorrhiza true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-12 07:19:06 2025-09-12 07:19:07 2025-10-28 03:47:50 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 263665 249015043 51056.pdf 51056.pdf 1 F4DAF3FD21B9714A76758F81B144AAB6 90cdb6330eadb77d31fe295fcdf7276f8facbbc8545132c9fee877bcfdbec0df d7916360-8f97-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217060 Biotehniška fakulteta 0 0 0