高温胁迫对芹菜幼苗细胞膜稳定性的影响  

Effect of High Temperature Stress on Cell Membrane in Celery Seedlings

作　　者：朱鑫[1,2] 沈火林[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094 [2]天津市农业高新技术示范园区管理中心,天津300192

出　　处：《北方园艺》2014年第7期16-20,共5页Northern Horticulture

摘　　要：以经京津地区多年夏季露地自然高温下筛选出的不同耐热性的8个芹菜品系为试材,在高温胁迫下,分析比较其膜稳定性、丙二醛含量和保护酶活性等指标。结果表明:经过一段时间的高温处理以后,耐热品系的膜稳定性高于不耐热品系,而丙二醛含量与耐热性呈负相关。保护酶变化各不相同,CAT活性与耐热性呈正相关。POD活性在高温下发生变化,随着高温处理温度的升高,POD活性有下降的趋势,但同一高温处理下,耐热品系POD活性升高幅度小于不耐热品系;SOD活性品系间有显著差异,但和耐热性无显著相关性。Taking 8 lines of celery with different heat resistance that screened out according to the observation of many years in the natural high temperature in summer of Tianjin and Beijing as materials, membrane stability, MDA content and protective enzyme activity were studied under high temperature stress. The results showed that the membrane stability of heat resistant lines were higher than heat sensitive lines,while MDA content was negatively correlated with heat resistance. Changes of each protective enzyme were not identical. CAT activity was positively associated with heat resistance. With the increase of heat treatment temperature, POD activity decreased, but the heat resistant lines increased less than heat sensitive lines in the same high temperature. There was significant difference in SOD activity between the lines, but no significant correlation between different lines.

关 键 词：芹菜 高温胁迫 膜稳定性 丙二醛 保护酶系统 

分 类 号：S636.3[农业科学—蔬菜学]