PJB-2023-371
VAM AND BRS AMEOLIORATES THE EFFECTS OF STUNTED GROWTH AND OXIDATIVE STRESS INDUCED BY LEAD
Qurat-ul-ain Masood
Abstract
The Plants deal with various biotic and abiotic stresses that greatly influence their growth and metabolic activities. Different biofertilizers and phytohormones are used to mitigate these stresses. Heavy metal toxicity is a threat to vegetation and environmental conditions. Lead is a severe heavy metal toxicant that induced impairments in morphological and biochemical attributes of plants. Vesicular arbuscular mycorrhizae (VAM) and Brassinosteroids (BRs) possess beneficial physiological responses and bioremediation capabilities to aid in the modulation of various biotic and abiotic stresses in plants.
This study will assess the mitigating effects of BRs and VAM on plant growth and metabolism in Luffa cylindrica plants affected by the heavy metal toxicity of lead. In terms of shoot and root length, and fresh and dry weight, we have examined growth parameters. biochemical parameters were evaluated in the form of protein, carbohydrate, phenol, and photosynthetic pigments. By estimating MDA levels, POD, and SOD enzymes, the antioxidant status was determined. Pb stressed L.cylindrica plant showed a significant drastic reduction in all physiological and biochemical parameters compared to control and VAM and BRs treated plants. Pb contains the highest significant MDA levels compared with all other treatments. The combined use of VAMs and BRs showed incomparable results in all physio-chemical aspects in the L.cylindrica plant. When exposed to VAM+BRs treatment, even Pb-treated plants that have severely damaged growth and metabolic activity show some resistance. The morphological and biochemical analysis showed that the combined application of VAM and BRs effective in the plant's capacity to cope with lead-induced metal toxicity. Consequently, these results provide a basis for further investigation on possible prevention and bioremediation options to address the toxicity effects of metals.
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