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Abstract <p>This study focused on <i>Gymnocladus assamicus</i>, a critically endangered plant species endemic to Arunachal Pradesh in Northeast India. The research examined the biochemical and antioxidant responses of <i>G. assamicus</i> under five individual abiotic stress conditions: heat, submergence, cold, drought, and low pH, along with two combined stress scenarios: heat + drought and cold + drought. Biochemical parameters such as hydrogen peroxide, malondialdehyde, phenols, flavonoids, alkaloids, tannins, and saponins, as well as antioxidant parameters like glutathione, ascorbate, proline, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity, were analyzed. Additionally, enzymatic antioxidants, including superoxide dismutase (SOD), glutathione peroxidase (GPX), glutathione reductase (GR), catalase (CAT), and ascorbate peroxidase (APX), were quantified, demonstrating increased activity under stress conditions. Key parameters significantly influenced by the stresses were identified using principal component analysis (PCA) and Pearson’s correlation coefficient analysis. These findings provided a comprehensive assessment of the biochemical composition, antioxidant properties, and enzymatic activities of <i>G. assamicus</i>, offering valuable insights into its bioactive compounds and potential health-promoting effects.</p>

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Impact of Abiotic Stress on Biochemical Profiles and Antioxidant Defense Mechanisms in Gymnocladus assamicus ex P.C. Kanjilal: Insights into the Survival Strategies of a Critically Endangered Himalayan Plant

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • Indrajit Kalita,
  • Bhaben Tanti

摘要

Abstract

This study focused on Gymnocladus assamicus, a critically endangered plant species endemic to Arunachal Pradesh in Northeast India. The research examined the biochemical and antioxidant responses of G. assamicus under five individual abiotic stress conditions: heat, submergence, cold, drought, and low pH, along with two combined stress scenarios: heat + drought and cold + drought. Biochemical parameters such as hydrogen peroxide, malondialdehyde, phenols, flavonoids, alkaloids, tannins, and saponins, as well as antioxidant parameters like glutathione, ascorbate, proline, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity, were analyzed. Additionally, enzymatic antioxidants, including superoxide dismutase (SOD), glutathione peroxidase (GPX), glutathione reductase (GR), catalase (CAT), and ascorbate peroxidase (APX), were quantified, demonstrating increased activity under stress conditions. Key parameters significantly influenced by the stresses were identified using principal component analysis (PCA) and Pearson’s correlation coefficient analysis. These findings provided a comprehensive assessment of the biochemical composition, antioxidant properties, and enzymatic activities of G. assamicus, offering valuable insights into its bioactive compounds and potential health-promoting effects.