Gibberellic Acid and Salicylic Acid Improved Atrazine and Pyrethroid Pesticide Phytoremediation Efficiency by Pennisetum purpureum cv. Mahasarakham in Soil
Date
2025
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Article
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Taylor and Francis Ltd.
Journal Title
Gibberellic Acid and Salicylic Acid Improved Atrazine and Pyrethroid Pesticide Phytoremediation Efficiency by Pennisetum purpureum cv. Mahasarakham in Soil
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Abstract
Many pesticides used in agriculture increase their contamination in agricultural areas and must be remediated from the soil. Sweet grass (Pennisetum purpureum cv. Mahasarakham), a cultivar of Napier grass with plant growth regulator application, was promised to increase pesticide removal from the soil. The cutting of sweet grass soaking with 0.01 mg/L gibberellic acid or 100 mg/L salicylic acid for 24 h before planting in pyrethroid and atrazine co-contaminated soil for 20 days. The results showed that both plant growth regulators could stimulate shoot and root growth of sweet grass in pyrethroid and atrazine co-contaminated soil. Also, both plant growth regulators could increase chlorophyll a and total chlorophyll content in sweet grass leaves, but there was no effect on the carotenoid, proline, and relative water content of sweet grass. Soaking in salicylic acid was more effective than soaking in gibberellic acid for promoting shoot length and dry weight. Sweet grass planting increased pyrethroid and atrazine removal from the soil, and gibberellic acid soaking was better than other treatments for enhancing permethrin (71.9%) removal by Sweet grass from the soil. The bioconcentration factor for all pesticides was less than 1, indicating a limited accumulation of pyrethroid and atrazine in sweet grass tissue. © 2025 Taylor & Francis Group, LLC.
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Soil and Sediment Contamination