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Germination and the Biochemical Response of Pumpkin Seeds to Different Concentrations of Humic Acid under Cadmium Stress

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  • Masoumeh Asadi Aghbolaghi

    (Department of Agronomy and Plant Breeding, College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran
    Current address: Department of Agronomy and Plant Breeding, College of Agriculture and Natural Resources, University of Tehran, P.O. Box 4111, Karaj 31587-11167, Iran.)

  • Mohammad Sedghi

    (Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, P.O. Box 4111, Ardabil 77871-31587, Iran)

  • Raouf Seyed Sharifi

    (Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, P.O. Box 4111, Ardabil 77871-31587, Iran)

  • Beata Dedicova

    (Department of Plant Breeding, Swedish University of Agricultural Sciences (SLU), Alnarp Box 190, 23422 Lomma, Sweden)

Abstract

The poisoning of heavy metals and their accumulation in food chains are major environmental and health risks. There have been several reports that determined that pumpkins tend to collect small amounts of nitrate or heavy metals. Therefore, the aim of the present study is to investigate the effect of organic matter (humic acid) on the germination and activity of antioxidant enzymes, glycosylate cycle enzymes, and utilization of lipid and protein reserves of pumpkin seeds under cadmium stress conditions. An experiment was conducted to quantify the germination response and biochemical change of pumpkin seeds to the use of humic acid under cadmium stress conditions. The treatments were cadmium at three levels (0 (control), 100, and 200 mg.L −1 ) and humic acid at five levels (0 (control), 100, 200, 300, and 400 mg.L −1 ). Linear and sigmoidal models were used to investigate the trend of trait changes. The results show that changes in the germination percentage and seed vigor were affected by applying humic acid and cadmium stress. The highest germination percentage for pumpkins was observed without stress and cadmium stress at a concentration of 200 mg.L −1 . The results of quantification for the germination and seed vigor also showed that the model of germination changes by the use of humic acid was sigmoidal in non-stress and cadmium stress conditions of 100 mg.L −1 , but it was linear for seed vigor in the stress conditions of 200 mg.L −1 . The activity of superoxide dismutase, catalase, peroxidase, isocitrate lyase, and malate synthase was also affected by the simultaneous use of humic acid and cadmium stress, and the trend of their changes was linear.

Suggested Citation

  • Masoumeh Asadi Aghbolaghi & Mohammad Sedghi & Raouf Seyed Sharifi & Beata Dedicova, 2022. "Germination and the Biochemical Response of Pumpkin Seeds to Different Concentrations of Humic Acid under Cadmium Stress," Agriculture, MDPI, vol. 12(3), pages 1-15, March.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:3:p:374-:d:765757
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    References listed on IDEAS

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    1. AfDB AfDB, . "Improving Statistics for Food Security, Sustainable Agriculture & Rural Development - An Action Plan for Africa (2011–2015) - Bulletin N°3," Global Strategy Implementation Bulletin, African Development Bank, number 368.
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    1. Hamidreza Balouchi & Vida Soltani Khankahdani & Ali Moradi & Majid Gholamhoseini & Ramin Piri & Seyedeh Zahra Heydari & Beata Dedicova, 2023. "Seed Fatty Acid Changes Germination Response to Temperature and Water Potentials in Six Sesame ( Sesamum indicum L.) Cultivars: Estimating the Cardinal Temperatures," Agriculture, MDPI, vol. 13(10), pages 1-17, October.

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