磁场处理黄瓜种子的生物学效应-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

生命科学

磁场处理黄瓜种子的生物学效应

陈怀军，吴俊林，高雪红，鲁百佐

(陕西师范大学物理学与信息技术学院，陕西西安 710062)

陈怀军，男，硕士研究生，主要研究方向为生物物理．

摘要:

用磁感应强度为100、200、300和400 mT的磁场分别处理黄瓜种子1、5和10 min，与对照组比较，观察其幼苗抗旱性的变化．结果表明，重度干旱胁迫时处理组幼苗中脯氨酸含量最多可增加15.3%，表明磁场能通过降低细胞渗透势来增加黄瓜幼苗抗旱性；过氧化物酶(peroxidase,POD)、超氧化物岐化酶(superoxide dismutase,SOD)活性最大增强幅度为17.5%和26.2%，表明磁场可以通过清除植物体内自由基和增强代谢增强黄瓜幼苗对水分胁迫的抗性；丙二醛(malondialdehyde, MDA)含量下降幅度为12.9%～23.4%，表明磁场处理可以降低膜脂过氧化程度，减少干旱对黄瓜幼苗的伤害．

关键词：

磁场；黄瓜；抗旱性

收稿日期：

2007-10-08

中图分类号：

Q68

文献标识码：

文章编号：

1672-4291(2008)04-0081-04

基金项目：

陕西省自然科学基金资助项目(2005A11)

Doi:

Biological effect of magnetic field on cucumber seeds

CHEN Huai-jun, WU Jun-lin*, GAO Xue-hong, LU Bai-zuo

(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

The cucumber seeds were treated 1、5 and 10 min in magnetic field with intensity 100、200、300 and 400 mT, respectively. The biological effects of cucumber seedlings after treated were compared with that of the control group. The results shows that proline content was increased 15.3%, and indicates that the drought resistance of cucumber seedlings could be enhanced due to reduction of the respectively, penetration potential of plant cells. The SOD and POD activity were increased 17.5% and 26.2% which shows that water stress could be alleviated by eliminating the free radicle and increasing metabolism. The MDA content was decreased 12.9%～23.4%, which shows that the magnetic field treatment can reduce the degree of membrane lipid peroxidation and the drought harm on cucumber seedlings.

KeyWords:

magnetic field; cucumber; drought resistance