铝胁迫对白苦瓜幼苗生长状况和生理特性的影响  

Effects of Aluminum Stress on Growth and Physiological Characteristics of White Balsam Pear Seedlings

作　　者：孟长军[1] MENG Changjun(Research Center of Wild Ornamental Plants in Qinling Mountains,School of Biology and Environmental Engineering,Xi＇an University,Xian 710065,China)

机构地区：[1]西安文理学院生物与环境工程学院,秦岭野生观赏植物研究中心,西安710065

出　　处：《中国农业科技导报》2018年第8期23-28,共6页Journal of Agricultural Science and Technology

基　　金：西安市科技计划创新基金文理专项(CXY1352WL16)资助

摘　　要：为了探究铝胁迫下白苦瓜的生理变化机制,研究了不同浓度(50 mg/L、100 mg/L、250 mg/L、500mg/L、800 mg/L)的铝胁迫对白苦瓜幼苗生长状况和生理指标的影响。结果表明:50 mg/L的Al Cl3溶液胁迫20 d,并未对白苦瓜的幼苗产生显著的抑制作用。随着铝胁迫浓度的增大,铝胁迫对白苦瓜幼苗的抑制作用逐渐加大。在800 mg/L的铝胁迫下,白苦瓜幼苗受到显著抑制,其株高仅为对照的20.16%。相比于生理指标,白苦瓜幼苗的生长指标(株高和鲜重)对铝胁迫更为敏感。铝胁迫下,白苦瓜能够通过提高POD活性来抵抗铝胁迫所带来的危害。铝胁迫下,叶绿素含量和根系活力的下降是白苦瓜生长受到抑制的重要原因。In order to explore the physiological mechanism of white balsam pear under aluminum stress,this paper studied the effects of aluminum stress at different concentrations（ 50 mg/L,100 mg/L,250 mg/L,500 mg/L,800 mg/L） on the growth and physiological indexes of white balsam pear seedlings. The results showed that 50 mg/L Al Cl3 had no significant inhibitory effect on the seedlings of white balsam pear after 20 d stress. With the increase of aluminum stress concentration,the inhibition effect on seedlings of white balsam pear gradually became stronger.Under the stress of 800 mg/L Al Cl3,the growth of white balsam pear seedlings were significantly inhibited,and plant height was only 20.16% of the control. Comparing with the physiological indexes,the growth indexes of white balsam pear seedlings（ plant height and fresh weight） were more sensitive to aluminum stress. Under aluminum stress,white balsam pear would resist the damage caused by aluminum stress through increasing POD activity. Under aluminum stress,the decrease of chlorophyll content and root activity was important reason for the inhibition of white balsam pear growth.

关 键 词：铝胁迫 白苦瓜 幼苗生长 生理指标 

分 类 号：S642.5[农业科学—蔬菜学]