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2014, vol. 51, br. 3, str. 170-174
Tolerantnost sejanaca sorti pšenice preko ubrzane degradacije glifosata
aNaučni institut za ratarstvo i povrtarstvo, Novi Sad
bMegatrend Univerzitet, Fakultet za biofarming, Bačka Topola

e-adresazoran.jerkovic@nsseme.com
Ključne reči: glifosat; herbicidi; Lr geni; sejanci; sorte pšenice; tolerantnost
Sažetak
Dužine nadzemnih delova sejanaca devet sorti pšenice gajenih u staklari bile su redukovane 4-20%. Testirane su pri temperaturama oko 20oC tokom proleća posle dva dnevno uzastopna tretmana herbicidom na bazi glifosata (0,5 ml u 1l vodenog rastvora, 0,5 dl na 0,5 m2). Na osnovu razlika između stalno veštački i dnevno osvetljenog ponavljanja prepoznate su četiri grupe sorti, što je potvrdilo rezultate dobijene kod izogenih linije različitih gena otpornosti prema prouzrokovaču lisne rđe (NIL) testiranih tokom zime. Rast sorte Pobeda bio je usporeniji kada nije bila permanentno osvetljena te je prepoznat uobičajen efekat herbicida. Tolerantnost drugih sorti je bila povezana sa ubrzanom degradacijom glifosata te uticajem posledične fosforne kiseline na inhibiciju hlorofila. Sorte Rapsodija, Simonida i Tavita su po reakciji prema herbicidu bile slične Lr 1 i Lr 21 liniji. Ubrzano žućenje lista NS 40S bilo je zavisno od gena Lr 3a neuticajnog na poslednje fosforne residue nakon otpuštanja kiseonika, dok je sličan efekat hidrolitički najstabilnijeg Lr 15 u NIL isključen na osnovu analiza uticaja na degradaciju glutena. Na osnovu pomenutih kriterijuma, sorte Gora i Metka su sadržale Lr 19, Enigma Lr 29 a Ilina Lr 24. Poštujući pre svega više vremena za eliminaciju originalnih rezidua herbicida blizu klasanja, česte temperature uslove povoljne za aktivnost Lr gena, posledice na rast te brži oporavak hlorofila, za tretman u to doba u semiaridnim regionima, sorte s Lr genima kao Gora, Metka i Enigma su prepoznate kao moguće praktično rešenje. Tretman sorte Ilina je rizičan usled očekivanog izostanka efekta a ostalih usled rezidua.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/ratpov51-6472
objavljen u SCIndeksu: 20.03.2015.
metod recenzije: dvostruko anoniman