Decorative plants can efficiently purify formaldehyde and improve the quality of indoor air. The existing studies primarily revealed that the aerial and underground parts of plants’ capacity to purify formaldehyde, while the performance of stems is unclear. A formaldehyde fumigation experiment was conducted on Epipremnum aureum and Rohdea japonica in a sealed chamber. Results showed the stems could remove formaldehyde. The efficiency of removal by the stems of each plant was 0.089 and 0.137 mg∙m⁻³∙h⁻¹, respectively, the rate of purification was 40.0 and 61.6%, respectively. Both were related to plant species and the latter was affected by other factors like exposed area. To further explore the mechanism of phytoremediation, the correlation between the concentration of formaldehyde and CO₂ during the experiment was investigated. Results showed when leaves of plants were exposed to formaldehyde, the concentration of CO₂ increased with the decrease in concentration of formaldehyde, and the change in concentration of CO₂ could be used as an indicator of the degree of decontamination of formaldehyde by the plants.

装饰植物能有效净化甲醛，改善室内空气质量。现有研究主要揭示了植物的地上和地下部分净化甲醛的能力，而茎的表现尚不清楚。在密闭室中对金黄色葡萄球菌和罗氏竹进行了甲醛熏蒸试验。结果表明，茎可以去除甲醛。每株植物的茎去除效率分别为 0.089 和 0.137 mg∙m ^-3 ∙h ^-1，纯化率分别为 40.0 和 61.6%。两者都与植物物种有关，后者受暴露面积等其他因素的影响。为了进一步探索植物修复的机理，研究了实验过程中甲醛浓度与CO _{2的相关性。}结果表明，植物叶片暴露于甲醛时，CO ₂浓度随甲醛浓度的降低而升高，CO 2 浓度的变化_可作为植物对甲醛去污程度的指标。