3种地被竹对大气臭氧胁迫的光合生理响应  

Effects of Atmospheric Ozone Stress on Photosynthetic Physio-response of Three Dwarf Bamboos

作　　者：李应[1,2] 陈双林[1] 谢双喜[2] 李迎春[1] 庄明浩[1] 郭子武[1] 杨清平[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]贵州大学林学院,贵阳550025

出　　处：《热带亚热带植物学报》2012年第3期263-269,共7页Journal of Tropical and Subtropical Botany

基　　金：中央级公益性科研院所基本科研业务费专项资金(RISF6915);国家林业公益性行业科研专项(201004008);浙江省省院合作项目(2010SY01)资助

摘　　要：以美丽箬竹(Indocalamus decorus)、黄条金刚竹(Pleioblastus kongosanensis f.aureostriatus)、白缟椎谷笹竹(Sasa glabra f.albostriata)3种优良地被观赏竹为试材,用开顶式同化箱(OTCs)模拟大气O3浓度,研究了不同O3浓度胁迫(环境背景大气、100nL L-1和150 nL L-1)对竹子光合生理指标的影响。结果表明,随着大气O3浓度的升高,美丽箬竹叶片叶绿素含量先升高后降低,黄条金刚竹呈相反变化规律,白缟椎谷笹竹呈下降趋势;它们的叶片类胡萝卜素含量变化不明显。美丽箬竹的Pn日均值先缓慢升高后降低,黄条金刚竹先略有升高后急剧降低,白缟椎谷笹竹逐渐降低;大气O3浓度升高明显影响3种竹的光合参数日变化进程;大气O3浓度为100 nL L-1时,美丽箬竹的光合作用未受到抑制,黄条金刚竹和白缟椎谷笹竹则出现明显的抑制效应;大气O3浓度达150 nL L-1时,3竹种的光合生理都受到严重的伤害。耐受O3胁迫能力存在种间差异,美丽箬竹明显高于黄条金刚竹、白缟椎谷笹竹。The effect of ozone stress on the photosynthetic physiological of three dwarf bamboos, such as lndocalamus decorus, Pleioblastus kongosanensis f. aureostriatus and Sasa glabra f. albostriata were studied. Three levels of ozone concentrations, including basic concentration of environment, 100 nL L^-1 and 150 nL L^-1, were simulated by using an open-top chamber （OTCs） technique. The results showed that the chlorophyll content in Indocalamus decorus leaves increased at first and then decreased with the ozone concentration increased, while that in Pleioblastus kongosanensis f. aureostriatus showed opposite change, and that in Sasa glabra f. albostriata declined. The changes in carotenoid content of three dwarf bamboos leaves were not obvious. The daily net photosynthetic rate （Pn） of lndocalamus decorus increased at first and then decreased, while that of Pleioblastus kongosanensis f. aureostriatus increased slightly at first and then decreased rapidly, and that of Sasa glabra f. dbostriata decreased. The daily changes of photosynthetic parameters in three dwarf bamboos were obvious with ozone concentration increment. Under 100 nL L^-1 ozone, the photosynthesis of Indocalamus decorus did not inhibit, but those in Pleioblastus kongosanensis f. aureostriatus and Sasa glabra f. albostriata inhibited obviously,while 150 nL L^-1 ozone caused serious damage to their photosynthetic physiological metabolism. In general, lndocalamus decorus showed higher tolerance to ozone than another bamboo.

关 键 词：臭氧胁迫 地被竹 光合色素 光合特征 气体交换 

分 类 号：S795[农业科学—林木遗传育种]