西北师范大学学报（自然科学版）Issue(6)：77-81,87,6.
锌对铁胁迫下小麦幼苗脯氨酸代谢的影响
Effect of zinc on proline metabolism under iron stress in wheat seedlings
摘要
Abstract
The effects of different ZnCl2 concentrations (50,250 μmol·L-1 and 2 mmol·L-1 )on proline content and the activities of proline related to metabolism enzymes are investigated in Xi Han wheat seedlings when exposed to 300 μmol·L-1 FeCl3 .The results show that proline content and ornithineδ-aminotransferase(OAT)activity due to single Fe stress significantly elevate as compared with the control, but both proline dehydrogenase(PDH)and glutamate kinase(GK)activities decrease in wheat roots and leaves under Fe treatment.The application of different Zn concentrations results in reduction of proline accumulation as well as inhibition of OAT and GK activities in roots and leaves of Fe-treated wheat;50 or 250 μmol·L-1 Zn together with Fe induce an increase in PDH activity as compared with the single Fe-treated wheat roots and leaves,while this enzyme in wheat leaves is inhibited in response to 2 mmol·L-1 Zn combined with Fe treatment.In conclusion,these results indicate that the elevation of proline content induced by Fe stress is correlated with the increase of OAT activity and the decrease of PDH activity in wheat roots and leaves;Zn applied leads to the decrease of proline content under Fe stress,which may be associated with the decrease of OAT activity and the elevation of PDH activity in wheat seedlings under Zn in combination with Fe treatment.关键词
锌/铁/小麦/脯氨酸Key words
Zinc/iron/wheat/proline分类
农业科技引用本文复制引用
杨颖丽,段晓晖,丁凡,魏静,许富强..锌对铁胁迫下小麦幼苗脯氨酸代谢的影响[J].西北师范大学学报（自然科学版）,2014,(6):77-81,87,6.基金项目
国家自然科学基金资助项目(31160088) （31160088）
兰州市科技计划项目(2011-1-142) （2011-1-142）
