油菜素内酯对低氧胁迫黄瓜幼苗根系多胺、ATPase活性及无机离子含量的影响  

Effects of brassinolide on the polyamines, ATPase activity, and inorganic ion content in roots of cucumber seedlings under hypoxia stress

作　　者：陆晓民[1,2] 郭世荣[1] 

机构地区：[1]南京农业大学园艺学院农业部南方蔬菜遗传改良重点开放实验室,南京210095 [2]安徽科技学院,安徽凤阳233100

出　　处：《生态学杂志》2013年第3期611-614,共4页Chinese Journal of Ecology

基　　金：国家重点基础研究发展计划项目(2009CB119000);国家自然科学基金项目(30871736);江苏省农业三新工程项目(SXGC[2012]391);(SX(2011)289)资助

摘　　要：研究了24-表油菜素内酯(EBR)对低氧胁迫黄瓜幼苗根系多胺、ATPase活性及无机离子含量的影响。结果表明,低氧导致根系内多胺(PAs)含量显著提高、(精胺+亚精胺)/腐胺的比值下降,而K+、Ca2+、Mg2+、Zn2+含量及ATPase活性显著下降;与单纯的低氧处理相比,EBR可增加低氧黄瓜幼苗根系亚精胺(Spd)、精胺(Spm)含量及(精胺+亚精胺)/腐胺的比值,显著提高ATPase活性及Ca2+、Mg2+、Fe3+、Mn2+含量。可见,EBR可调节幼苗根系多胺变化,有效提高ATPase活性,促进无机离子的吸收,缓解了低氧的伤害。A laboratory experiment was conducted to study the effects of 24-epibrassinolide （EBR） on the polyamines（PAs）, inorganic ion content, and ATPase activity in roots of cucum- ber seedlings under hypoxia stress. Hypoxia stress induced the significant increase of PAs, the decrease of （Spd＋Spm）/Put ratio, and the significant decrease of K＋, Ca2＋, Mg2＋, and Zn2＋ contents and of ATPase activity. EBR could increase the Spm and Spd contents and the （ Spd ＋ Spm）/Put ratio under hypoxia stress, and in addition, significantly increase the Ca2＋, Mg2＋, Fe3., and Mn2＋ contents and the ATPase activity. It was suggested that EBR could regulate the PAs content, increase the ATPase activity, enhance the inorganic ion content, and thereby, alle- viate the damage of hypoxia stress.

关 键 词：黄瓜 低氧胁迫 24-表油菜素内酯 多胺 无机离子 ATPASE 

分 类 号：S642.2[农业科学—蔬菜学]