Vpliv slanostnega stresa na kalivost in fotosintezne pigmente koruze (Zea mays L.)

Sali ALIU, Imer RUSINOVCI, Shukri FETAHU, Bekim GASHI, Emilija SIMEONOVSKA, Ludvik ROZMAN

Povzetek


Namen raziskave je bil proučiti vpliv slanosti tal na kalivost zrnja ter vsebnost kolorofila in karotinoidov pri koruzi. V proučevanje sta bila vključena dva hibrida ‘Bc 678’ and ‘Bc 408’, vzgojena na Zavodu za koruzo Inštituta za žlahtnjenje rastlin v Zagrebu ter dve domači populaciji (LMP-1 and LMP-2) s Kosova. Poskus je bil izveden v 4 ponovitvah in sicer za kalivost v petrijevkah po 100 zrn, za vsebnost klorofila in karotinoidov pa v lončkih po 2 rastlini z 1 kg substrata. Vsak genotip je bil, poleg kontrole, tretiran s 4 različnimi koncentracijami (50, 100, 200 in 400 mMol NaCl in CaCl2 ). Kalivost smo ugotavljali prvih 15 dni vsakih 24 ur. Klorofil ‘a’ in ‘b’ in karotinoide smo ekstrahirali z 80 % acetonom. Vsebnost klorofila in karotinoidov smo računali s pomočjo absorpcijske vrednosti pri 662, 644 and 440 nm. Pri največji slanosti (400 mMol NaCl in CaCl2) je pri vseh kultivarjih ugotovljen statistično značilno manjši odstotek in indeks kalivosti. Prav tako so pri vseh kultivarjih ugotovljene statistično značilne razlike med različnimi koncentracijami slanosti tudi za vsebnost klorofila ‘a’ in ‘b’ ter vsebnost karotinoidov.

Ključne besede


koruza; slanost tal; kalivost; NaCl; CaCl2; klorofil; karotinoidi

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2015.105.1.09

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