空气凤梨对温度逆境的交叉适应  

Cross-adaptation of Two Epiphytic Tillandsia Species to Temperature Stress

作　　者：郑桂灵[1] 李鹏[1] 

机构地区：[1]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《北方园艺》2015年第10期82-86,共5页Northern Horticulture

基　　金：青岛农业大学高层次人才科研基金资助项目(1113351)

摘　　要：以硬叶空凤(Tillandsia stricta‘Hard leaf’)与贝可丽空凤(Tillandsia brachycaulos‘Multiflora’)为试材,研究了温度逆境处理对空气凤梨形态变化及可溶性糖含量、脯氨酸含量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、丙二醛(MDA)含量、可溶性蛋白质含量等生理生化指标的影响。结果表明:2种空气凤梨对低温和高温均有一定的耐受性,但在-5℃低温和45℃高温条件下,2种空气凤梨失绿、萎蔫,说明这2个温度已达到或超过空气凤梨生长的临界温度。但是,不论在低温或高温环境下,2种空气凤梨体内可溶性糖含量、可溶性蛋白质含量、脯氨酸含量、SOD活性、POD活性、MDA含量等产生相似变化,暗示它们对2种相对立的胁迫环境(低温与高温)具有相似的抗性机制,即交叉适应。Taking Tillandsia stricta ‘Hard leaf＇and Tillandsia brachycaulos‘Multiflora＇as the materials,effect of temperature stress on plant morphological and physiological characters including contents of soluble sugars,soluble proteins,proline,the activities of SOD,POD and MDA content were studied.The results showed that two Tillandsia species were tolerant to low or high temperature within 5-35℃.However,under the stress of-5℃ and 45℃,two Tillandsiaspecies began to wither,which suggested that these two temperatures were almost to or beyond the critical temperature.Moreover,contents of soluble sugars,soluble proteins,prolines,the activities of SOD,POD and MDA content decreased or increased synchronically under the low and high temperature,which indicated that two species were cross adapted to temperature stress,i.e.cross-adaptation.

关 键 词：空气植物 交叉适应 温度 胁迫 

分 类 号：S682.39[农业科学—观赏园艺]