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<p>Rice (<i>Oryza sativa</i> L.) encounters significant challenges from insect pests, among which the brown planthopper (BPH), <i>Nilaparvata lugens</i> is particularly damaging. Plants respond to this stress by generating reactive oxygen species (ROS), demanding effective defense mechanism. Superoxide dismutase (SOD) and catalase (CAT) are important antioxidant enzymes that neutralize harmful ROS. Our research investigated SOD and CAT activity changes in these germplasm under BPH infestations after 96&#xa0;h. Initial observations identified discrete SOD and CAT activity differences among germplasms, with PTB 33, Salkathi, RP 2068-18-3-5 and IRG-98 showing the highest and lowest activity respectively. After BPH feeding, SOD and CAT activities gradually increased in resistant germplasms up to 96&#xa0;h indicating the biochemical based resistance mechanism.</p>

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Antioxidant Enzyme Activity in Diverse Rice Germplasm Under Brown Planthopper, (Nilaparvata lugens) Infestation

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Darshana Brahma,
  • Subhash Chander,
  • S. Rajna,
  • Ranjith Ellur

摘要

Rice (Oryza sativa L.) encounters significant challenges from insect pests, among which the brown planthopper (BPH), Nilaparvata lugens is particularly damaging. Plants respond to this stress by generating reactive oxygen species (ROS), demanding effective defense mechanism. Superoxide dismutase (SOD) and catalase (CAT) are important antioxidant enzymes that neutralize harmful ROS. Our research investigated SOD and CAT activity changes in these germplasm under BPH infestations after 96 h. Initial observations identified discrete SOD and CAT activity differences among germplasms, with PTB 33, Salkathi, RP 2068-18-3-5 and IRG-98 showing the highest and lowest activity respectively. After BPH feeding, SOD and CAT activities gradually increased in resistant germplasms up to 96 h indicating the biochemical based resistance mechanism.