Uptake and in-plant transport of formaldehyde by six plants with or without soil microorganisms were investigated. The capabilities of fresh and boiled leaf extracts to dissipate added formaldehyde were also measured to evaluate formaldehyde metabolism in plant tissues. Results show that when the initial formaldehyde level in air was 0.56 ± 0.04 mg·m⁻³, the removal rate in the plant-only systems varied from 1.91 to 31.8 μg·h⁻¹·g⁻¹ FW (fresh weight). The removal rate of plants in the plant-only systems were ordered as Helianthus annuus Linn > Lycopersicon esculentum Miller > Oryza sativa > Sansevieria trifasciata Prain > Bryophyllum pinnatum > Mesembryanthemum cordifolium L. f. Most reduction of formaldehyde in the air was due to degradation by active components in the plant tissues, of which 4–64% of these were through to be enzymatic reactions. In the microbe-plant systems, formaldehyde removal rates increased by 0.24–9.53 fold compared to the plant-only systems, with approximately 19.6–90.5% of the formaldehyde reduction resulting from microbial degradation. Microorganisms added to the rhizosphere solution enhanced phytoremediation by increasing the downward transport of formaldehyde and its release by roots. Results suggest a new means to screen for efficient plant species that can be used for phytoremediation of indoor air.

研究了六种有或没有土壤微生物的植物对甲醛的吸收和植物内运输。还测量了新鲜和煮沸的叶提取物消散添加的甲醛的能力，以评估植物组织中的甲醛代谢。结果表明，当空气中的甲醛初始含量为0.56±0.04 mg·m ^-3时，纯植物系统中的去除率从1.91到31.8μg·h ^-1 ·g ^-1 FW（鲜重）。在仅植物系统中的植物去除率按以下顺序排序：向日葵（Helianthus annuus Linn）>番茄（Lycopersicon esculentum Miller）>水稻（Oryza sativa） >虎皮草（Sansevieria trifasciata Prain）>裸子藻（Bryophyllum pinnatum）>菊科植物L. f。空气中甲醛的减少最多是由于植物组织中活性成分的降解，其中4-64％是通过酶促反应进行的。与仅使用植物的系统相比，在微生物-植物系统中，甲醛去除率提高了0.24-9.53倍，其中微生物降解导致的甲醛减少量约占19.6％-90.5％。根际溶液中添加的微生物通过增加甲醛的向下运输及其从根部释放而增强了植物修复作用。结果表明，筛选出可用于室内空气植物修复的有效植物种类的新方法。