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<p>The study aimed to investigate the impact of GABA in overcoming ultraviolet (UV)-C light exposure for 15, 30, and 45&#xa0;min on <i>Pseudochlorella pringsheimii</i> microalgae. UV-C exposure for 45&#xa0;min is the most lethal to microalgae growth. Among different combinations, the maximum biomass (0.98&#xa0;g/L), pigments (chl <i>a</i>- 4.36&#xa0;µg/mL; chl <i>b</i>- 2.04&#xa0;µg/mL; car- 2.03&#xa0;µg/mL<i>)</i> and lipid content (23.10%) was observed under treatment with UV-C for 15&#xa0;min coupled with 2.5&#xa0;mM GABA, whereas, the control groups attained 0.76&#xa0;g/L of biomass, 3.45, 1.49, and 1.63 µg/mL of chl <i>a</i>, chl <i>b</i>, and car and 21.73% of lipid content. However, a decrease in biomass, lipid and pigment content was found under treatment with UV-C (no GABA). The carbohydrate content was observed to be maximum (43.88%) in microalgae cells treated with UV-C, whereas the protein content was lower in both the treatments i.e., 20.02% under UV-C and 23.46% under UV-C + GABA, as compared with that of control (33.09%). Therefore, the current study might be a new approach for enhancing the production of essential components in microalga under exposure to stress conditions.</p> Graphical Abstract <p></p>

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Investigating the Role of GABA (gamma-aminobutyric acid) in Mitigating UV-C Light Exposure on Pseudochlorella pringsheimii Microalgae

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Pooja Bhatnagar,
  • Prateek Gururani,
  • Manisha Nanda,
  • Pankaj Gautam,
  • Mikhail S. Vlaskin,
  • Krishna Kumar Jaiswal,
  • Vinod Kumar

摘要

The study aimed to investigate the impact of GABA in overcoming ultraviolet (UV)-C light exposure for 15, 30, and 45 min on Pseudochlorella pringsheimii microalgae. UV-C exposure for 45 min is the most lethal to microalgae growth. Among different combinations, the maximum biomass (0.98 g/L), pigments (chl a- 4.36 µg/mL; chl b- 2.04 µg/mL; car- 2.03 µg/mL) and lipid content (23.10%) was observed under treatment with UV-C for 15 min coupled with 2.5 mM GABA, whereas, the control groups attained 0.76 g/L of biomass, 3.45, 1.49, and 1.63 µg/mL of chl a, chl b, and car and 21.73% of lipid content. However, a decrease in biomass, lipid and pigment content was found under treatment with UV-C (no GABA). The carbohydrate content was observed to be maximum (43.88%) in microalgae cells treated with UV-C, whereas the protein content was lower in both the treatments i.e., 20.02% under UV-C and 23.46% under UV-C + GABA, as compared with that of control (33.09%). Therefore, the current study might be a new approach for enhancing the production of essential components in microalga under exposure to stress conditions.

Graphical Abstract