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Exogenous ABA Enhances the Antioxidant Defense System of Maize by Regulating the AsA-GSH Cycle under Drought Stress

Author

Listed:
  • Zizhu Jiang

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China
    Qiqihar Agricultural Technology Extension Center, Qiqihar 161005, China
    These authors contributed equally to this work.)

  • Hengguang Zhu

    (Qiqihar Agricultural Technology Extension Center, Qiqihar 161005, China
    These authors contributed equally to this work.)

  • Hanyu Zhu

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

  • Yuzhao Tao

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

  • Changzhuang Liu

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

  • Jiaqi Liu

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

  • Fuqiang Yang

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

  • Ming Li

    (College of Agriculture, Northeast Agricultural University, Harbin 150030, China)

Abstract

When drought occurs during the maize-filling period, the probability of yield decline increases. Abscisic acid (ABA) plays a regulatory role in physiological and metabolic activities during plant development. However, its effect on the antioxidant system of maize leaves during the grain-filling stage is unclear. Maize plants (Zhengdan958) were used as an experimental material, and ABA was sprayed on the leaves during the grain-filling stage. The plants were placed under drought conditions to analyze the relationship between the ascorbate-glutathione (AsA-GSH) cycle and hydrogen peroxide (H 2 O 2 ) removal. Exogenous ABA significantly reduced the malondialdehyde content, relative electrolyte leakage, and H 2 O 2 under drought stress. This is similar to the exogenous ABA effect on the AsA-GSH cycle. Exogenous ABA upregulated the transcription of related genes and alleviated the inhibition of drought stress on the monodehydroascorbate reductase and dehydroascorbate reductase activities, thereby further increasing the ascorbate peroxidase and glutathione reductase activities. It contributed to an increase in the AsA and GSH levels and inhibited the decrease in the AsA/dehydroascorbic acid and GSH/oxidized glutathione ratios. Therefore, exogenous ABA plays an important role in improving the antioxidant capacity and drought resistance physiology of maize by enhancing antioxidant enzyme activity and stabilizing the AsA and GSH redox state.

Suggested Citation

  • Zizhu Jiang & Hengguang Zhu & Hanyu Zhu & Yuzhao Tao & Changzhuang Liu & Jiaqi Liu & Fuqiang Yang & Ming Li, 2022. "Exogenous ABA Enhances the Antioxidant Defense System of Maize by Regulating the AsA-GSH Cycle under Drought Stress," Sustainability, MDPI, vol. 14(5), pages 1-15, March.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:5:p:3071-:d:765371
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    References listed on IDEAS

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    1. Quirin Schiermeier, 2014. "Water risk as world warms," Nature, Nature, vol. 505(7481), pages 10-11, January.
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    Cited by:

    1. Liujun Feng & Zhiqiang Chen & Haiyan Wang & Zhibiao Chen & Zuliang Chen, 2024. "Rare Earth Elements Induce Drought Tolerance in Dicranopteris pedata from Ion-Adsorbed Rare Earth Mining Area in Southern China," Sustainability, MDPI, vol. 16(23), pages 1-18, December.

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