Interference of three weed extracts on uptake of nutrient in three different varieties of paddy through radio tracer techniques.

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dc.contributor.authorSaxena, Sen_US
dc.contributor.authorSharma, Ken_US
dc.contributor.authorKumar, Surendraen_US
dc.contributor.authorSand, N Ken_US
dc.contributor.authorRao, P Ben_US
dc.date.accessioned2004-10-24en_US
dc.date.accessioned2009-06-02T03:56:15Z
dc.date.available2004-10-24en_US
dc.date.available2009-06-02T03:56:15Z
dc.date.issued2004-10-24en_US
dc.description.abstractInterference of three dominant weed extracts viz., Ageratum conyzoides L., Melilotus indica All. and Parthenium hysterophorus L. were examined on seed germination, seedling growth, and nutrient uptake (32P and 65Zn) in three different varieties (PD-10, PD-12 and PB) of paddy (Oryza sativa L.). Among the three different varieties irrespective of weed extracts, PD-10 and PD-12 were resistant and PB was susceptible in terms of seed germination, radicle length and plumule dry weight; and PD-12 and PB were resistant and susceptible, respectively, in terms of plumule length and total seedling dry weight. A. conyzoides caused maximum reduction in seed germination and M. indica in seedling growth in different varieties of paddy. The weed extracts interfered in uptake of both 32P and 65Zn and there was a gradual decrease in uptake of both nutrients with increasing concentration of extracts in both root and shoot. The uptake of 32P and 65Zn was more inhibitory with the extracts of A. conyzoides and M. indica, respectively in different varieties. The inhibition in seed germination, seedling growth and nutrient uptake may be due to the presence of phenolics and other secondary metabolities. The phenolics such as gallic, vanillic, protocatechuic and p-hydroxybenzoic acids were identified from these weed extracts.en_US
dc.description.affiliationDepartment of Biological Sciences, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology-263 145, India.en_US
dc.identifier.citationSaxena S, Sharma K, Kumar S, Sand NK, Rao PB. Interference of three weed extracts on uptake of nutrient in three different varieties of paddy through radio tracer techniques. Journal of Environmental Biology. 2004 Oct; 25(4): 387-93en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/113417
dc.language.isoengen_US
dc.source.urihttps://www.geocities.com/j_environ_biol/en_US
dc.subject.meshAnalysis of Varianceen_US
dc.subject.meshAsteraceae --chemistryen_US
dc.subject.meshChromatography, High Pressure Liquiden_US
dc.subject.meshGermination --drug effectsen_US
dc.subject.meshIndiaen_US
dc.subject.meshMelilotus --chemistryen_US
dc.subject.meshOryza sativa --drug effectsen_US
dc.subject.meshPhenols --analysisen_US
dc.subject.meshPhosphorus Radioisotopes --pharmacokineticsen_US
dc.subject.meshPlant Extracts --chemistryen_US
dc.subject.meshScintillation Countingen_US
dc.subject.meshSpecies Specificityen_US
dc.subject.meshZinc Radioisotopes --pharmacokineticsen_US
dc.titleInterference of three weed extracts on uptake of nutrient in three different varieties of paddy through radio tracer techniques.en_US
dc.typeComparative Studyen_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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