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2012, br. 189-190, str. 29-38
Odgovori klonova crne topole na oporavak posle vodnog deficita u kontekstu fotosinteze, transpiracije i efikasnosti korišćenja vode
aUniverzitet u Novom Sadu, Prirodno-matematički fakultet, Departman za biologiju i ekologiju
bNaučni institut za ratarstvo i povrtarstvo, Novi Sad
cInstitut za nizijsko šumarstvo i životnu sredinu, Novi Sad
Projekat:
Biosensing tehnologije i globalni sistem za kontinuirana istraživanja i integrisano upravljanje ekosistemima (MPNTR - 43002)

Ključne reči: Populus nigra L.; genotipovi; sušni stres; oporavak
Sažetak
Pet genotipova crne topole (Populus nigra L.) su u polu-kontrolisanim uslovima izloženi različitim vodnim režimima: optimalnoj zasićenosti vodom (kontrola), suši praćenoj oporavkom optimalnog vodnog kapaciteta i tretmanu konstantne suše. U odgovoru genotipova na vodni deficit i oporavak, ispitivane su promene parametara koji se odnose na razmenu CO2 i vodene pare u listu, kao što su intenzitet fotosinteze (P) i transpiracije (T) i efikasnost korišćenja vode (WUE). Ponovno podizanje vodnog kapaciteta zemljišta na 90%, nakon vodnog deficita pri kapacitetu od 40%, uslovilo je oporavak intenziteta fotosinteze, transpiracije i efikasnosti korišćenja vode na nivoe približne vrednostima kontrolnih biljaka. Nakon 16 dana konstantne suše (vodni kapacitet u opsegu 50-40%) utvrđeno je snažno opadanje analiziranih parametara u svim genotipovima. Značajne varijacije analiziranih parametara među genotipovima ukazuju na specifične adaptivne predispozicije određenih gentipova u odnosu na sušni stres.
Reference
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
objavljen u SCIndeksu: 22.03.2013.

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