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<p>Roadside plants serve as biomonitoring agents by absorbing air pollutants and reducing environmental contamination. The objective of this study was to to assess the air pollution tolerance and heavy metal accumulation capacity of 36 common roadside plant species in Mymensingh, Bangladesh, using the Air Pollution Tolerance Index (APTI) and Metal Accumulation Index (MAI). Various biochemical parameters, including total chlorophyll content, ascorbic acid levels, leaf extract pH, and relative water content, were analysed to evaluate plant susceptibility to pollution. The APTI values among the studied species ranged from 5.64 to 19.23, with <i>Syzygium cumini</i> exhibiting the highest tolerance (APTI 19.23) and <i>Mussaenda frondosa</i> the highest sensitivity (APTI 5.64). Only <i>Syzygium cumini</i> was classified as an intermediate tolerant species, while all other plants were sensitive. Heavy metal analysis using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) revealed that Fe (33.96&#xa0;mg/kg) was the most accumulated metal, followed by Mn (6.68&#xa0;mg/kg) and Ni (2.71&#xa0;mg/kg). <i>Elaeis guineensis</i> had the highest MAI (5.173), while <i>Gardenia jasminoides</i> had the lowest (0.322). Strong correlations were observed between APTI and total chlorophyll content (R<sup>2</sup> = 0.5927) and between APTI and ascorbic acid (R<sup>2</sup> = 0.7792), indicating their role in pollution tolerance. The study findings highlight the potential of <i>Syzygium cumini</i> and <i>Elaeis guineensis</i> for air pollution mitigation and biomonitoring, aiding urban planners in selecting appropriate plant species for greener, healthier environments.</p>

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Evaluation of Tolerance Index of Commonly Growing Roadside Plants in Urban Traffic Areas of Mymensingh City, Bangladesh Using Air Pollution Tolerance Index and Metal Accumulation Index

  • 期刊论文

  • 发表日期：

    2025年4月19日

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  • Shahed Mahmud,
  • Sneha Gautam,
  • M. Safiur Rahman,
  • Mahmud Hossain,
  • Golam Mortuza,
  • Md.Badiuzzaman Khan

摘要

Roadside plants serve as biomonitoring agents by absorbing air pollutants and reducing environmental contamination. The objective of this study was to to assess the air pollution tolerance and heavy metal accumulation capacity of 36 common roadside plant species in Mymensingh, Bangladesh, using the Air Pollution Tolerance Index (APTI) and Metal Accumulation Index (MAI). Various biochemical parameters, including total chlorophyll content, ascorbic acid levels, leaf extract pH, and relative water content, were analysed to evaluate plant susceptibility to pollution. The APTI values among the studied species ranged from 5.64 to 19.23, with Syzygium cumini exhibiting the highest tolerance (APTI 19.23) and Mussaenda frondosa the highest sensitivity (APTI 5.64). Only Syzygium cumini was classified as an intermediate tolerant species, while all other plants were sensitive. Heavy metal analysis using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) revealed that Fe (33.96 mg/kg) was the most accumulated metal, followed by Mn (6.68 mg/kg) and Ni (2.71 mg/kg). Elaeis guineensis had the highest MAI (5.173), while Gardenia jasminoides had the lowest (0.322). Strong correlations were observed between APTI and total chlorophyll content (R2 = 0.5927) and between APTI and ascorbic acid (R2 = 0.7792), indicating their role in pollution tolerance. The study findings highlight the potential of Syzygium cumini and Elaeis guineensis for air pollution mitigation and biomonitoring, aiding urban planners in selecting appropriate plant species for greener, healthier environments.