Morphological & productivity response of Abelmoschus esculentus (OKRA) under the stress of lead nitrate

The experiment was conducted to evaluate the morphological & productivity response on Abelmoschus esculentus under the stress of lead nitrate. The seeds of Abelmoschus esculentus were treated with 0.1%, 0.2%, 0.3%, 0.4% & 0.5% treatment concentration of lead nitrate before sowing in the experimental plot and the resulting plants were considered as M₁ generation. The seed obtained from M₁ generation under different treatment were again treated with the corresponding concentration of lead nitrate & the obtained crop is designated as M₂ generation. The result showed a decreasing trend in the seed germination, seedling survival, height of native plant, number of pod formation and weight of 100 seeds with increase in the treatment concentration however there is no significant effect of lead nitrate on emergence of branches. The average height of survived plants increased upto 0.2% treatment concentration of lead nitrate in comparison to control thereafter, with increasing the treatment concentration, the average height decreased. Besides average height of the plants, results showed increasing deleterious effect with increasing the treatment concentration of lead nitrate in respect to germination percentage, survival of seedlings, number of pods per plants and weight of seeds in both M₁ & M₂ generation. The deleterious effect is maximum in 0.5% treatment concentration. Thus considering all the parameters taken for study, it clearly showed negative impact on overall growth, morphological features and ultimately productivity of Abelmoschus esculentus in comparision to control. The deleterious effect increases with increasing the treatment concentration of lead nitrate.