高温胁迫下甜菜硷和甘露醇对仙客来的保护效应  

Protective effect of betaine and mannitol on cyclamen under the condition of high temperature stress

作　　者：曲复宁[1] 尤翠荣 康黎芳[2] 李立新[2] 王云山[2] 

机构地区：[1]烟台大学生物化学系,山东烟台264005 [2]山西省农业科学院园艺研究所,山西太原030001

出　　处：《西北农林科技大学学报（自然科学版）》2002年第5期60-62,共3页Journal of Northwest A&F University(Natural Science Edition)

基　　金：山东省科技攻关项目 (0 12 0 10 12 1)

摘　　要：用仙客来幼苗作试材 ,对高温胁迫前后的根系活力、叶内游离脯氨酸、叶绿素、丙二醛及叶片渗漏液电导率进行测定。结果表明 ,在 35℃高温下 ,仙客来幼苗根系活力下降 ,叶绿素破坏 ,叶内游离脯氨酸、丙二醛及叶片渗漏液电导率上升 ,且随着高温程度加强 ,其伤害程度加重。在 4 5℃高温胁迫前用甜菜硷 (10 0 m g/L )或甘露醇 (5 0 mg/L )处理仙客来叶片 ,可减轻高温对根系活力和叶绿素的影响 ,同时可使高温胁迫下叶片游离脯氨酸、丙二醛及叶片渗漏液电导率上升幅度降低。Root vitality before and after high temperature stress,free proline in leaves,chlorophyll,malonaldehyde and conductivity of leaking liquid from leaves were tested using cyclamen seedlings as test material.The results showed that,under the condition of high temperature stress,the vitality of root system decreased,chlorophyll was damaged,free proline and malonaldehyde in leaves as well as conductivity of leaking liquid from leaves were increased.With the increase of temperature,damage became severer.Treating leaves of cyclamen with betaine (200 mg/L) and mannitol (100 mg/L) could alleviate the influence of high temperature on the vitality of root system and chlorophyll,thus inhibiting the increase of free proline,malonaldehyde and conductivity of leaking liquid from leaves.

关 键 词：高温胁迫 甜菜硷 甘露醇 仙客来 保护效应 

分 类 号：S682.262[农业科学—观赏园艺]