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<p>Indoor particulate matter (PM) remains a critical air-quality concern, yet plant-based mitigation studies have largely focused on leaves and rarely resolve organ-level retention or the role of cuticular wax fractions. PM capture by leaves and perianths of <i>Phalaenopsis</i> ‘Mantefon’, one of the most widely used indoor ornamental potted plants, was quantified following four weeks of controlled indoor exposure. Surface-deposited PM (SPM) was partitioned into SPM2.5 and SPM10, and wax-associated PM (WPM) was assessed via sequential wax extraction to operationally define epicuticular and intracuticular wax fractions (EW and IW). Perianths accumulated more SPM10 than leaves (6.4 vs. 2.5&#xa0;µg·cm⁻²), whereas SPM2.5 loads were comparable between organs (5.6 vs. 4.5&#xa0;µg·cm⁻²). Across organs, WPM was dominated by the IW-enriched fraction, reaching 11.4&#xa0;µg·cm⁻² in leaves and 28.7&#xa0;µg·cm⁻² in perianths, exceeding the EW fraction (6.0 and 8.7&#xa0;µg·cm⁻²). Wax loads were greater in the IW fraction and positively correlated with WPM (R² = 0.698). These results demonstrate that perianths contribute substantially to whole-plant PM retention under indoor conditions and that PM sequestration is strongly associated with the IW-enriched fraction. Evaluating PM mitigation across plant organs and operationally defined wax fractions, rather than leaves alone, is therefore essential.</p>

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Organ-specific particulate matter capture in phalaenopsis ‘Mantefon’ with contrasting contributions of leaves and perianths

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Min Kyung Lim,
  • Wan Soon Kim

摘要

Indoor particulate matter (PM) remains a critical air-quality concern, yet plant-based mitigation studies have largely focused on leaves and rarely resolve organ-level retention or the role of cuticular wax fractions. PM capture by leaves and perianths of Phalaenopsis ‘Mantefon’, one of the most widely used indoor ornamental potted plants, was quantified following four weeks of controlled indoor exposure. Surface-deposited PM (SPM) was partitioned into SPM2.5 and SPM10, and wax-associated PM (WPM) was assessed via sequential wax extraction to operationally define epicuticular and intracuticular wax fractions (EW and IW). Perianths accumulated more SPM10 than leaves (6.4 vs. 2.5 µg·cm⁻²), whereas SPM2.5 loads were comparable between organs (5.6 vs. 4.5 µg·cm⁻²). Across organs, WPM was dominated by the IW-enriched fraction, reaching 11.4 µg·cm⁻² in leaves and 28.7 µg·cm⁻² in perianths, exceeding the EW fraction (6.0 and 8.7 µg·cm⁻²). Wax loads were greater in the IW fraction and positively correlated with WPM (R² = 0.698). These results demonstrate that perianths contribute substantially to whole-plant PM retention under indoor conditions and that PM sequestration is strongly associated with the IW-enriched fraction. Evaluating PM mitigation across plant organs and operationally defined wax fractions, rather than leaves alone, is therefore essential.