PJB-2020-326
A COMPARISON OF INHIBITORY EFFECTS INDUCED BY PEG 6000 AND EUPHORBIA HIRTA IN CROP PLANTS; A PRELIMINARY STUDY
SAIRA QADIR
Abstract
Euphorbia hirta L. is commonly found in all tropical regions of the world, this invasive weed has an adverse effect on other plants. The current study features two important aspects: (i) Effects of E. hirta roots exudates (0, 50, 75 and 100% concentrations) (ii) Influence of PEG 6000 “Polyethylene glycerol” (8, 16 and 40 g/l concentrations) on germination and growth criterion of Cicer arietinum L.(Chick pea) and Phaseolus vulgaris L. (French bean). In this regard osmotic potential of all the solutions have been balanced. It is observed that the root leachates of weed significantly (p < 0.05) affected the germination rate while PEG has failed to induce any remarkable activity neither a sound suppression nor an appreciative promotion. Despite the fact that growth parameters of both the test crops have altered by the addition of weed and PEG solutions but highest inhibition has determined from the root length (3.5 cm) of C. arietinum induced by root leachates which in contrast to PEG (11.97 cm) this might be due to the presence of allelochemicals. The prescribed treatments also raised their pH values, where highest pH (7.9) obtained from 100% spurge weed induction which is relatively a stronger basic nature rather than neutral control samples.. Comparative studies of both test crops showed that C. arietinum has appeared to be more influential than P. vulgaris. 2-way ANOVA has produced a comprehensive significant difference (p < 0.05) between the effects of both treatments on germination and growth of test crops while within group (concentrations of each treatment) are weakly significant (p < 0.1) to each other. This would rather intimates that the inhibition has strongly emerged as an allelopathic response of Cicer arietinum and Phaseolus vulgaris plants by the induction of spurge weed (Euphorbia hirta) root exudates.
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