Abstract Detail



Physiology

Anwar , Dr. Tauseef [1], Qureshi, Dr. Huma [1].

Isolation and Characterization of weedicidal compounds from Lantana camara.

Allelochemicals are non-nutritive secondary metabolites. Allelochemicals can potentially be used as growth regulators, herbicides, insecticides, and antimicrobial crop protection products. The study was aimed to evaluate allelopathic potential of Lantana camara flowers against selected weeds of Triticum aestivum viz. Avena fatua, Euphorbia helioscopia, Chenopodium album, Phalaris minor and Rumex dentatus. The bioassay analysis of three methanolic flower, CombiFlash fractions was carried out at 100%, 75% and 50% concentration compared to control using parameters of germination percentage, radicle and plumule length (cm) inhibition. The CombiFlash fraction 2 significantly inhibited all weeds while showing non-significant effect on T. aestivum compared to fraction 1 and 3. The CombiFlash fraction 2 showed minimum germination percentage for P. minor (31%), radicle length for A. fatua (32%) and plumule length for R. dentatus (31%). The assessment of physiological effects by the fraction indicated significant suppression in chlorophyll, antioxidant enzymes (peroxidase, superoxide dismutase) and protein contents of all weeds. Gas chromatography-mass spectroscopy (GC-MS) and nuclear magnetic resonance (NMR) of the fraction, identified four allelopathic fatty acid methyl esters (FAMEs) viz. Methyl oleate, Methyl palmitate, Methyl stearate and Methyl linoleate. The allelopathic potential of these four compounds is reported for the first time.


1 - Pir Mehr Ali Shah Arid Agriculture University, Botany, Shamsabad, Murree Road, Rawalpindi, Punjab, 46300, Pakistan

Keywords:
combiflash
phytotoxicity
bio herbicide
fatty acid methyl esters
physiological parameters
weed management.

Presentation Type: Oral Paper
Number: 0007
Abstract ID:131
Candidate for Awards:Physiological Section Physiological Section Li-COR Prize,Physiological Section Best Paper Presentation


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