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Allelopathic Effect of Tree of Heaven on Radish Seed

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From the regression analysis, it is clear that the growth length of the root of the raddish seeds and the concentration of the toxins from the altissima are strongly negatively correlated. It is clear that the growth in root length is significantly affected by the concentration of toxins from the altissima (R2=0.93), P= p=0.001). As the concentration of the toxins produced by altissima increases, the rate of root length reduces significantly. It is observed that raddish seeds growth in root length is highest at the lowest concentration. However, the highest germination percentages were noted in a condition of distilled water and at low toxin concentration.

Toxin concentration significantly caused a significant impact on the rate of growth in root length decreasing with the increasing concentration. At higher concentration, the rate of increase in root length in the raddish seeds was significantly lower relative to lower concentration. It is worth noting that seeds tend to recover, following their transfer from the concentrated environment to the distilled water. Final recovery percentages of germination in higher concentration treatments were found to be significantly higher as compared to the none-concentrated controls.

This indicates that the exposure of the seeds to higher concentration tend to permanently inhibit root growth. It is also clear that the pH values of the aqueous extracts affect root growth. It was also observed that there was a strong correlation between the concentration of toxins from the altissima and germination. Statistically, it is observed that root growth is significantly affected by the concentration of altissima (R2=0.93), p=0.001). However, the highest rate of germination was noted in a condition of low concentration.

Concentration significantly roots growth with the rate of root growth decreasing with the increasing concentration. At higher concentration, the root growth rate was significantly lower relative to lower concentration. Notably, seeds tend to recover well in terms of root growth, following their transfer from the altissima concentrated environment to the distilled water.

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