铝对桉树幼苗生长及某些生理特性的影响

Effect of Aluminium on the Growth and Some Physiological Characters of Eucalyptus Seedlings

关键词:  铝  巨尾桉  生长  生理特性

Key words:  aluminium  Eucalyptus  growth  physiological character

摘要:

用溶液培养法研究了铝对巨尾桉幼苗生长及某些生理特性的影响。结果表明,低浓度的铝(<10mg/L)对桉苗根系生长有一定的促进作用,根系活力增强。在铝胁迫下,叶片生长受阻,植株高生长下降,分枝减少,硝酸还原酶活性下降,脯氨含量和过氧化物酶与过氧化氢酶活性则升高。多酚氧化酶活性在铝浓度较低时有所下降,当铝浓度升高到一定程度时,多酚氧化酶活性则呈现上升的趋势。

Abstract:

Effect of aluminium on the growth and some physiological characters of Eucalyptus (E.grandin×E. urophylla) seedling was studied with liquid medium culture method. The results showed that the growth of root systems and the vigor of root systems were promoted in low concentration of aluminium (<10mg/L). Under aluminium stress the growth of leaves was inhibited, the plant height and the branch number were decreased, and so did the activity of nitrate reducatase. However,the content of proline and the activities of peroxidase and catalase in leaf were increased when the concentration of aluminium increased.The activity of polyphenol oxidase was decreased in low concentration of aluminium but it tended to increased with the concentration of aluminium increased.