在大气干旱条件下胀果甘草气孔振荡的RLC电路模拟  

RLC circuit simulation of stomatal oscillation of Glycyrrhiza inflata under atmospheric drought condition.

作　　者：王根轩[1] 赵松岭[2] 

机构地区：[1]河南大学生物系,开封475001 [2]兰州大学干旱生态实验室,兰州730000

出　　处：《应用生态学报》1993年第2期131-135,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金

摘　　要：建立了植物水分输导和蒸腾的电阻(R)、电感(L)、电容(C)电路模型。实验测定出的胀果甘草气孔振荡发生、持续和衰减的阈值与模型分析结果一致。当蒸腾拉力(F)大于输导阻力(R)时气孔开始振荡并使振幅逐渐加大;当F=R时气孔振荡的振幅和频率不变;当0<(R-F)<2(1/2)/(L/C)时气孔振荡开始减弱;当(R-F)>2(1/2)/(L/C)时气孔不会出现振荡。在本实验条件下胀果甘草的R=3.1×10~9MPa·m^(-3)·s,2(1/2)/(L/C)=3.11-3.64×10~5MPa·m^(-3)·s。In this paper, the RLC circuit model for transmission and transpiration of plant moisture is established. No difference can be found between the results of direct determination and model analysis on thresholds of initation, continuation and attenuation of stomatal oscillations of Glycyrrhiza inflata. The stomatal oscillation is initiated and its amplitude is being enhanced when the transpirational pulling force (F) is larger than the resistance(R). The amplitude and frequency of stomatal oscillation are not changed when F=R. The oscillation begins to be weakened when 0<(R-F)<2(L/C)^(1/2), and doesn't appear when(R-F)>2 (L/C)^(1/2). Under this experimental condition, the R of G. inflata is 3.1×10~9MPa·m^(-3)·s and the 2 (L/C)^(1/2) is 3.11-3.64×10~5MPa·m^(-3)·s.

关 键 词：气孔振荡 干旱 胀果甘草 蒸腾 

分 类 号：Q948.112.3[生物学—植物学]