Abstract            Volume:14  Issue-4  Year-2026         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

The present investigation was undertaken to evaluate the toxicological effects of lead nitrate on phinology and productivity on Pisum sativum L., using two varieties, IPF-99-25 (Adarsh) and IPFD-1-10 (Prakash). Healthy seeds were treated with different concentrations of lead nitrate (0.1%, 0.2%, 0.3%, 0.4% and 0.5%) to raise M? generation and seeds obtained from M? were similarly treated with corresponding concentration to obtain M? generation under field conditions. The results revealed that lower concentrations (0.1%–0.3%) had negligible effect on days taken for flowering and harvesting period in comparison to control in both varieties and generations. However, higher concentrations (0.4% and 0.5%) caused a slight delay in flowering, indicating stress-induced alteration in phenological behaviour while harvesting duration remained largely unaffected. Yield-related parameters showed a clear declining trend with increasing concentration of lead nitrate. The number of pods per plant and weight of 100 seeds decreased progressively from lower to higher doses in both varieties with more pronounced reduction at 0.5% concentration. The M? generation exhibited a similar pattern, confirming the cumulative inhibitory effect of lead nitrate. Since yield is directly governed by pod number and seed weight, an overall reduction in yield potential was observed with increasing treatment concentration. Thus, the study indicates that lead nitrate exerts a concentration-dependent toxic effect on Pisum sativum, where lower doses are relatively safe, while higher concentrations adversely affect reproductive and yield attributes.

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