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运用开顶式气室(OTCs)模拟大气CO2浓度升高(500、700μmol·mol-1)情景,以环境背景大气为对照,研究CO2浓度升高对3种地被类观赏竹(美丽箬竹、黄条金刚竹和白缟椎谷笹竹)叶片的膜脂过氧化和抗氧化系统的影响及其种间差异.结果表明:试验进行103 d后,500μmol·mol-1CO2浓度下,3种地被类观赏竹的叶片超氧阴离子含量、丙二醛(MDA)含量、相对电导率和可溶性糖含量总体上没有发生明显的变化,但叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)活性有一定程度的改变;700μmol·mol-1CO2浓度下,3个竹种的叶片MDA含量和相对电导率没有发生明显变化,但对叶片超氧阴离子含量、可溶性糖含量和SOD、POD、CAT、APX活性的影响较为明显.不同竹种对CO2浓度升高环境的适应能力为美丽箬竹>黄条金刚竹>白缟椎谷笹竹.
Atmospheric CO2 concentration (500, 700 μmol · mol-1) was simulated using open-top gas chambers (OTCs). The effects of CO2 concentration on the air quality of the three species of ornamental bamboo , Macaca mulberry and Betula platyphylla) on the membrane lipid peroxidation and antioxidant system were studied.The results showed that under the concentration of 500μmol · mol-1CO2 for 3 days, The leaf superoxide anion content, malondialdehyde (MDA) content, relative conductivity and soluble sugar content of ornamental bamboo did not change obviously, but the superoxide dismutase (SOD), peroxidase (POD) (CAT) and ascorbate peroxidase (APX) activity of the three bamboo species did not change significantly under the concentration of 700μmol · mol-1CO2, However, the effects of superoxide anion content, soluble sugar content and activities of SOD, POD, CAT and APX in leaves were more obvious.The adaptability of different species of bamboo to environment with increasing CO2 concentration was the beauty 箬 bamboos> 黄 金 刚 缟> 白 缟 缟 谷笹 bamboo.