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Glasnik Šumarskog fakulteta
2014, br. 110, str. 145-158
jezik rada: engleski
vrsta rada: izvorni naučni članak
doi:10.2298/gsf1410145s


Uticaj povećanih koncentracija Zn na klijanje semena i rast sejanaca Ailanthus altissima (Mill.) Swingle
Univerzitet u Beogradu, Šumarski fakultet

e-adresa: sladjasamuilov@yahoo.com

Projekat

Istraživanje klimatskih promena i njihovog uticaja na životnu sredinu - praćenje uticaja, adaptacija i ublažavanje (MPNTR - 43007)

Sažetak

Neki teški metali, kao što je cink, su esencijalni mikronutrijenti neophodni biljkama za obavljanje važnih fizioloških procesa. Međutim, povećane koncentracije cinka mogu imati negativne efekte na rast i razvoj biljaka i prouzrokovati pojavu simptoma toksikacije. Zbog toga je vrlo važno ispitati koje drvenaste vrste su tolerantne na povećane koncentracije cinka i koje se odlikuju sposobnošću preživljavanja na zemljištima kontamiranim teškim metalima U radu je ispitivan efekat povećanih koncentracija cinka na klijanje semena i razvoj klijavaca invazivne drvenaste vrste Ailanthus altisima (Swingle) Mill. radi boljeg razumevanja adaptivnih sposobnosti ove vrste na stres od teških metala i mogućnosti korišćenja u fitoremedijaciji. Semena vrste Ailanthus altissima tretirana su cink sulfatom u koncentracijama 25, 100 i 250 μM. Nakon klijanja, klijavci su premešteni u komoru za gajenje u hidrokulturu gde je cink sulfat dodat u koncetracijama od 100, 250 i 500 μM. Dobijeni rezultati ukazuju da tretmani cinkom, uključujući i najveću koncentraciju, nisu u potpunosti inhibirali klijanje semena iako je došlo do smanjenja pokazatelja klijanja. Analizirajući dužinu hipokotila i korenka, utvrđeno je da ne postoji značajna statistička razlika između različitih tretmana. U daljem gajenju u hidroponskom eksperimentu, cink je inhibirao razviće listova i korena. Analizirani kvantitativni parametri klijanja i morfometrija klijavaca A. altissima pokazuju tolerantnost na povećane koncentracije cinka, u ovim najranijim fazama razvića, dok se u fazi formiranja prvih listova uočava inhibitorni efekat većih koncentracija.

Ključne reči

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