Keemiliste abiootiliste stressifaktorite mõju ilutaimedele
Laen...
Kuupäev
2012
Kättesaadavus
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Keemilised abiootilised stressifaktorid on mulla liigne soolsus, liiga kõrge või madal pH, saasteained (õhusaaste, raskmetallid). Kui ilutaimel pole vastava stressifaktori suhtes välja kujunenud tolerantsi, siis tekivad taimel erinevad kahjustused ja taim võib surra. Töö eesmärgiks on teaduskirjanduse põhjal anda ülevaade keemiliste abiootiliste stressifaktorite mõjust ilutaimedele toetudes hüpoteesile, et ilutaimede reaktsioon ja sellest tulenevad nähud abiootilise stressi keemilistele faktoritele sõltuvad liigist. Erinevad stressifaktorid toovad kaasa sarnaseid sümptomeid, täpset diagnoosi ei saa anda vaid taime visuaalsel hindamisel. Stressifaktorid on omavahel tihedalt seotud ja mõjutavad teineteist. Sümptomid ja muutused taimes tulenevad erinevatest põhjustest. Ilutaimede tolerantsus sõltub nii taimeperekonnast kui –liigist. Ühele stressifaktorile vastupidav taim võib olla tundlik teise stressifaktori suhtes. Antud uurimustöö põhjal võib järeldada, et hüpotees leidis kinnitust. Nimelt mõjutavad keemilised abiootilised stressifaktorid (soolsus, substraadi ja vee pH ning toksiinid) ilutaimi erinevalt ja stressifaktorist põhjustatud sümptomid taimel sõltuvad vaadeldava faktori arvväärtusest või kontsentratsioonist ning taimeliigist.
Chemical abiotic stress factors are: excessive soil salinity, too high or low pH, toxins (air pollution, heavy metals). If tolerance to stress factors has not been developed by the ornamental plant, variety of damages may occur and the plant could die. The aim of this Barchelor thesis was to give an overview on the basis of scientific literature of the influence of the chemical abiotic stress factors to the ornamental plants considering the hypothesis that the reaction of the ornamental plants and the resulting effects on the abiotic stress chemical factors depend on the type of the plant. Different stress factors result in similar symptoms, accurate diagnosis can not be given by only visual assessment of the plant. Stress factors are closely related and affect each other. Symptoms and changes arise due to variety of reasons. The tolerance of ornamental plants depends on the plant genus as well as on species. Resistant to one of the stress factors, the plant could be sensitive to other stress factors. The hypothesis was confirmed according to the research. Chemical abiotic stress factors (salinity, substrate and water pH as well as toxins) influence ornamental plants differently and symptoms caused by stress factors depend on the numerical value or concentration and plant species according to the observed factor.
Chemical abiotic stress factors are: excessive soil salinity, too high or low pH, toxins (air pollution, heavy metals). If tolerance to stress factors has not been developed by the ornamental plant, variety of damages may occur and the plant could die. The aim of this Barchelor thesis was to give an overview on the basis of scientific literature of the influence of the chemical abiotic stress factors to the ornamental plants considering the hypothesis that the reaction of the ornamental plants and the resulting effects on the abiotic stress chemical factors depend on the type of the plant. Different stress factors result in similar symptoms, accurate diagnosis can not be given by only visual assessment of the plant. Stress factors are closely related and affect each other. Symptoms and changes arise due to variety of reasons. The tolerance of ornamental plants depends on the plant genus as well as on species. Resistant to one of the stress factors, the plant could be sensitive to other stress factors. The hypothesis was confirmed according to the research. Chemical abiotic stress factors (salinity, substrate and water pH as well as toxins) influence ornamental plants differently and symptoms caused by stress factors depend on the numerical value or concentration and plant species according to the observed factor.
Kirjeldus
Märksõnad
ilutaimed, stress, abiootilised tegurid, soolsus, pH, toksiinid, tolerantsus (biol.), bakalaureusetööd