Generation of fragrant materials and purification of air by plants in an artificial environment

森林中产生的一种被称为“杀藻剂”的芳香物质是众所周知的提神剂。本研究的目的是探讨人工环境条件与芳香物质产生的关系，并利用这些物质来清新建筑室内空气。以高约15cm的日本柏树幼苗为研究材料，采用气相色谱法测定α -蒎烯的生成。在64 μ mol/m^2 s和32.5 μ mol/m^2 s的光照条件下，α -蒎烯的生成速率与温度呈指数函数关系，其系数为1.21/ C。随光照强度的增加，其速率略有下降，但趋势不明显。由于加速生长的温度水平高于正常生长的适宜温度范围，因此可以认为对树木的一种热胁迫增加了生长。植物生长和生理反应的研究应与芳香物质生成的研究相结合。

The fragrant materials which is called "Phytoncide" generated in forests is well known to refresh people. The purpose of this study was to investigate the relationship between the artificial environment conditions and the generation of fragrant materials and to utilize the materials for refreshing the room air in buildings.Young seedlings of Japanese cypress (approximate height is 15 cm) were used and the generation of alpha Pinene is measured by a gas-chromatography. The light levels for the present experiment were 64 and 32.5 mumol/m^2 sec.It was found that the generation rate of alpha Pinene is expressed as an exponential function of temperature and the coefficient is 1.21/ﾟC.There was not a clear tendency but the rate was slightly decreasing with light intensity.Since the level of temperature which accelerates the generation was higher than the adequate temperature range for normal growth, it was considered that a kind of heat stress on trees increased the generation. The study of plant growth as well as physiological reaction should be associated with the study of fragrant material generation.