Scholarlink

<p>Bisphenol A (BPA), a widely used industrial chemical, poses potential threats to aquatic ecosystems due to its persistence and bioactivity. This study investigates the short-term phytotoxic effects of BPA on the aquatic fern <i>Azolla pinnata</i> by examining morphological responses and chlorophyll fluorescence dynamics. <i>A. pinnata</i> plants were exposed to BPA concentrations of 0, 1, 10, 20, 30, and 40&#xa0;mg/L for 24&#xa0;h. Morphological assessments revealed clear dose-dependent stress symptoms, beginning with minor frond spacing and slight discoloration at 1–10&#xa0;mg/L, progressing to chlorosis, fragmentation, and browning at 20–30&#xa0;mg/L, and culminating in severe discoloration, fragmentation, and drastic reductions in frond density at 40&#xa0;mg/L. Chlorophyll fluorescence analyses, based on the JIP-test, demonstrated significant impairment of PSII photochemistry, particularly at higher BPA concentrations. Key photosynthetic parameters such as Fv/Fo, ΦPo, ΦEo, PIabs, PIcsm, and RC/CSm declined markedly, while non-photochemical quenching indicators (Kn and DIo/ABS) increased, indicating photoinhibition and disruption of energy fluxes. Principal Component Analysis (PCA) and correlation analyses further confirmed the significant alterations in photosynthetic performance under BPA stress. The present investigation highlights that <i>A. pinnata</i> can be used as a potential bioindicator for monitoring BPA-induced pollution in aquatic bodies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Morphological and photosynthetic responses of Azolla pinnata to bisphenol A

  • 期刊论文

  • 发表日期：

    2026年2月18日

查看全文
  • Hari Dev Chaudhary,
  • Upma Bhatt,
  • Vineet Soni

摘要

Bisphenol A (BPA), a widely used industrial chemical, poses potential threats to aquatic ecosystems due to its persistence and bioactivity. This study investigates the short-term phytotoxic effects of BPA on the aquatic fern Azolla pinnata by examining morphological responses and chlorophyll fluorescence dynamics. A. pinnata plants were exposed to BPA concentrations of 0, 1, 10, 20, 30, and 40 mg/L for 24 h. Morphological assessments revealed clear dose-dependent stress symptoms, beginning with minor frond spacing and slight discoloration at 1–10 mg/L, progressing to chlorosis, fragmentation, and browning at 20–30 mg/L, and culminating in severe discoloration, fragmentation, and drastic reductions in frond density at 40 mg/L. Chlorophyll fluorescence analyses, based on the JIP-test, demonstrated significant impairment of PSII photochemistry, particularly at higher BPA concentrations. Key photosynthetic parameters such as Fv/Fo, ΦPo, ΦEo, PIabs, PIcsm, and RC/CSm declined markedly, while non-photochemical quenching indicators (Kn and DIo/ABS) increased, indicating photoinhibition and disruption of energy fluxes. Principal Component Analysis (PCA) and correlation analyses further confirmed the significant alterations in photosynthetic performance under BPA stress. The present investigation highlights that A. pinnata can be used as a potential bioindicator for monitoring BPA-induced pollution in aquatic bodies.