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2020, vol. 69, br. 1, str. 46-55
Uticaj svetlosti različitog intenziteta na neke morfo-anatomske karakteristike i fiziološke parametre u mladim biljkama Pisum sativum L.
Univerzitet u Banjoj Luci, Prirodno-matematički fakultet, Republika Srpska, BiH

e-adresatanja.maksimovic@pmf.unibl.org
Ključne reči: svjetlost; grašak; stome; transpiracija; fotosintetički pigmenti
Sažetak
Da bismo utvrdili u kojoj mjeri smanjen intenzitet svjetlosti utiče na neke morfo-anatomske karakteristike i fiziološke parametre kod mladih biljaka Pisum sativum L. u ovom radu upoređivali smo određene parametre biljaka gajenih pri punoj osvjetljenosti (3200 lux) sa biljkama koje su gajene pri nižem intenzitetu osvjetljenosti (1700, 1000 i 650 lux). Krajnji cilj je bolje razumijevanje adaptacija istraživane vrste (sorte) na različit svjetlosni tretman. Nizak intenzitet svjetlosti pokazao je negativan uticaj na anatomsku građu listova graška te doveo do razvoja tanjih listova u odnosu na biljke koje su gajene pri punoj osvjetljenosti. Dobijeni rezultati ukazuju da su debljina epidermisa lica i naličja, debljina liske, debljina palisadnog tkiva i prečnik provodnih snopića se smanjivali sa smanjenjem osvjetljenosti, dok se debljina sunđerastog tkiva povećavala. Broj stoma ina licu i na naličju listova je bio manji pri nižoj osvjetljenosti s tim što su stomine ćelije bile većih dimenzija. Intenzitet transpiracije se smanjivao sa smanjenjem osvjetljenosti što je u korelaciji sa smanjenjem broja stominih ćelija. Rezultati pokazuju da je niži svjetlosni tretman inhibitorno djelovao na sadržaj fotosintetičkih pigmenata, što ukazuje na osjetljivost istraživane vrste i ostavlja pitanje nivoa prilagođenosti i eventualnog smanjenog prinosa istraživane vrste ukoliko se gaji u uslovima nedovoljne osvjetljenosti.
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O članku

jezik rada: engleski
vrsta rada: izvorni članak
DOI: 10.5937/ZemBilj2001046M
objavljen u SCIndeksu: 26.05.2020.
Creative Commons License 4.0

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