香紫苏在不同发育阶段的蒸腾作用与环境因子之间关系的研究

对香紫苏不同发育阶段的蒸腾作用与环境因子的相互关系进行了系统研究。结果表明,香紫苏在苗期的蒸腾作用最强,其日变化最大,蕾期次之,花期最小,并且温度、光照强度和叶温与蒸腾速率之间均呈现明显的正相关,而气孔导度与光照强度及温度之间却呈现出负相关性,湿度和气孔导度之间则呈明显的正相关。蒸腾速率与气孔导度日变化趋势类似,可能在于二者通过一定的协调关系,控制叶面水分的蒸发。

Relationship Between Transpiration of Salvia sclarea L. and Environmental Factors

In order to study relationship between leaf transpiration at different developmental stages and environmental factors,Salvia sclarea L was used in this investigation.The results showed that the transpiration of leaves for the plat studied at seeding stage was the strongest and changed dramatically in one day.Furthermore,at bud stage,the transpiration of leaves for the plant was inferior to seeding stage and the transpiration of leaves at the stage of florescence was ebb.From the research results,it also could be seen that temperature,intensity of illumination and leaf temperature had positive clearly correlation with transpiration rates.However,intensity of illumination and temperature had negative correlation with stomatal conductance,while the humidity appeared to be positive correlation with transpiration of stomatal conductance.In addition,transpiration rate and stomatal conductance had the similar trends in day time.By particular analysis,it has been discovered that they had some relationship between them and may control the evaporation of the`plant leaf.