ANALYSIS OF ABA-DEPENDENT ANTIOXIDANT RESPONSE OF WHEAT SEEDLINGS UNDER THE INFLUENCE OF EXOGENOUS SUGARS

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dc.contributor.authorSandeep Kaur
dc.date.accessioned2017-02-14T10:56:34Z
dc.date.available2017-02-14T10:56:34Z
dc.date.issued2013
dc.description.abstractSugar(Glucose; G and Sucrose; S) regulation of seed germination, growth and antioxidant potential, and involvement of ABA biosynthesis in these regulations were studied in two wheat cultivars varying in ABA sensitivity, where C306 was ABA-higher sensitive and PBW343 was ABA-lesser sensitive. Two concentrations (1.5% and 3%) of both sugars were used for germination and growth experiments where sodium tungstate was used as inhibitor of ABA biosynthesis. Germination inhibition was observed under both sugars supply but ABA biosynthesis was involved only under 3% S in PBW343 and 1.5% S in C306 otherwise not involved in such inhibition. Growth of seedlings was inhibited under both concentration of G and under 3% S in both cultivars where ABA biosynthesis contributed in such inhibition under 1.5% G in both cultivars and 3% S in PBW343. Growth was stimulated under 1.5% S, it involved ABA biosynthesis in both cultivars. Increases in antioxidant enzymes were higher under G than under S in both cultivars and were higher in C306 than PBW343 under both sugar supply. These increases involved ABA biosynthesis in both cultivars. Reduced state of ascorbate was affected under G while increased under S in roots and shoots of PBW343. Reduced state of ascorbate was increased under both G and S in shoots but decreased in roots of C306. Maintainence of reduced state of ascorbate under S involved ABA biosynthesis in both cultivars. Roots of C306 showed toxicity symptoms under G and S where there were concomitant increases in dehydroascorbate, malondialdehyde, H2O2 and decreases reduced state of ascorbate.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810000878
dc.keywordsABA, Glucose, Sucrose, Antioxidant, Wheaten_US
dc.language.isoenen_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.subAgricultural Biochemistryen_US
dc.subjectsowing, intercropping, wheats, tillage equipment, seed drilling, crops, mustard, fertilizers, land resources, chickpeasen_US
dc.themeWHEATen_US
dc.these.typeM.Scen_US
dc.titleANALYSIS OF ABA-DEPENDENT ANTIOXIDANT RESPONSE OF WHEAT SEEDLINGS UNDER THE INFLUENCE OF EXOGENOUS SUGARSen_US
dc.typeThesisen_US
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