高CO_2浓度下狗尾草与谷子光合特性比较研究  

Effects of Elevated CO_2 on Photosynthetic Capacity of Setaria italica and Setaria viridis

作　　者：冯文新[1] 宗毓铮[1] 郝兴宇[1] 任小云[1,2] 翟思龙 韩渊怀[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801 [2]山西农业大学园艺学院,山西太谷030801 [3]南京农业大学农学院,江苏南京210095

出　　处：《草地学报》2017年第2期424-428,共5页Acta Agrestia Sinica

基　　金：国家自然科学基金(31501276);山西农业大学科技创新基金(2014018);博士引进人才项目(2013YT05);山西省科技攻关项目(20150311006-2)资助

摘　　要：比较了开顶式生长室中不同CO_2浓度(380ppm与560ppm)下狗尾草(Setaria viridis)与谷子(Setaria italica)光合作用的长期适应性。高浓度CO_2下,拔节与抽穗期狗尾草Pn显著高于谷子,且中午前后升高显著。高浓度CO_2下狗尾草抽穗期主要叶绿素荧光参数(ΦPSII,qP和ETR)、收获期单株茎叶生物量、籽粒产量提高幅度均高于谷子。总之,高浓度CO_2对狗尾草光合能力的提高作用显著大于谷子,未来可能对谷子生产造成较大影响。In this study, the gas exchange parameters, chlorophyll fluorescence parameters and grain yield of foxtail millet and green millet grown in the CO2 open top chambers （380 or 560 ppm） were investigated. During elongation and heading stages, the elevated atmospheric COz increased Pnmore in green millet than in foxtail millet, especially during 10 ： 00- 14 ： 00. Meanwhile, the e[CO2 ] increased the ФPSII, qP and ETR for green millet but not for foxtail millet. In the heading stage, the e[CO2] down-reguated Pn in green millet but not in the foxtail millet. In the harvest stage, the e[CO2] increase panicle weight, grain weight per panicle and shoot biomass more in green millet than in foxtail millet. In conclusion, the e[CO2] contributed to improve photosynthesis for green millet more than for foxtail millet, which may affect the foxtail millet production in future.

关 键 词：CO2浓度升高 狗尾草 谷子 光合作用 

分 类 号：S515[农业科学—作物学] S544.3