Evidence of Hydropassive Movement in Stomatal Oscillations of Glycyrrhiza inflata under Desert Conditions  

荒漠条件下甘草气孔振荡的水被动证据(英文)

作　　者：王根轩[1] 廖建雄[1] 吴冬秀[2] 

机构地区：[1]兰州大学干旱农业生态国家重点实验室,兰州730000 [2]河南大学生物系,开封475001

出　　处：《Acta Botanica Sinica》2001年第1期41-45,共5页Acta Botanica Sinica（植物学报：英文版）

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina ( 3 9770 447) ;NationalKeyBasicResearchSpecialFundsofChina (G19990 1170 5

摘　　要：Stomatal conductance was found to change from steady-state to a slate of oscillations during daytime when vapour pressure deficit (VPD) increased to a value of 1 kPa in Glycyrrhiza inflata Batalin grown under the conditions of arid desert in north-west China. The injected metabolic inhibitors (NaN3 or carbonyl cyanide-m-chlorophenyl-hydrazone (CCCP)) slightly reduced the stomatal conductance but did not significantly decrease the intensity of stomatal oscillations (amplitude/average). The oscillation intensity was found to he significantly correlated with VPD and root resistance, but not with the respiration rate. There might exist a minimum threshold of VPD (0.8 kPa) and root resistance (1/4 relative value) that induced stomatal oscillations. These results suggested that stomatal oscillations induced by atmospheric drought stress and root resistance were mainly a type of hydropassive movement.生长在中国西北干旱荒漠的甘草 (GlycyrrhizainflataBatalin) ,当白天大气水蒸汽压差 (VPD)高于 1kPa时 ,其气孔导度随时间的变化趋势为从稳态转为振荡态。通过茎木质部注射代谢抑制剂 (NaN3 或羰基氰化物 间 氯苯腙(CCCP) )使气孔导度有些微降低 ,但是并不能显著改变气孔振荡强度 (振幅 /平均值 )。气孔振荡强度与VPD和根阻力显著相关 ,但与呼吸速率无明显相关。在荒漠条件下 ,当VPD大于 0 .8kPa和至少存在 1/ 4全根阻力的条件下才可能出现气孔振荡。

关 键 词：stomatal oscillations Glycyrrhiza inflata hydropassive movement stomatal conductance vapour pressure deficit 

分 类 号：Q948.112.3[生物学—植物学] S567.710.1[农业科学—中草药栽培]