Keywords: 
• silviculture /
• aluminum toxicity /
• Phyllostachys pubescens /
• germination rate /
• aluminum－tolerance /
• protective enzyme

Abstract: Based on the effects of different aluminum （Al） concentrations （0，50，200，500，and 2 000 molL-1） on seed germination，seedling root growth，superoxide dismutase （SOD），peroxidase （POD），and malondialdehyde （MDA） in Phyllostachys pubescens （moso bamboo），this study determined the level of Al tolerance for moso bamboo through comparison with two rice cultivars：Oryza sativa IR1552（Al－sensitive） and Oryza sativa Azucena（Al－tolerant）. Results showed that an Al concentration of 200 molL－1 did not significantly inhibit seed germination of moso bamboo，whereas with 500 molL－1，germination was inhibited but not significantly. Also，an Al concentration of 2 000 molL－1 resulted in 50% survival. For the 500 molL－1 Al treatment，seedling root growth was inhibited in 1 d，and with continued Al stress growth within 3 d did not recover. However，with continued Al stress，root growth in IR1552 recovered within 3 d. Meanwhile，with Al stress for 3 d，there was no significant increase of SOD activity in the root tips of moso bamboo （P = 0.153 1），but POD activity for moso bamboo（P = 0.018 0），IR1552 and Azucena（P＜0.05） were significant. In addition，POD activity and MDA content in the root tips of moso bamboo were higher than in IR1552. These results showed that P. pubescens had a lower Altolerance than IR1552indicating a moderate Al－tolerance in plants.［Ch，3 fig. 3 tab. 29 ref.］