广西植物2011，Vol.31Issue(5)：646-650,5.DOI:10.3969/j.issn.1000-3142.2011.05.015
不同光强下入侵植物剑叶金鸡菊与伴生种生长和光合特征研究
Study on growth and photosynthesis traits of the invasive species Coreopsis lanceolata and its co-occuring species in contrasting light conditions
摘要
Abstract
To better understand its invasion mechanism and comprehensive control, we compared the morphological and physiological traits of C. Lanceolata with those of its co-occurring species Bidens bipirmata and Rumex japonicus under two different irradiance treatments(full irradiance and 31% of the full irradiance), then analyzed the correlation between those traits and invasiveness. It was found that C. Lanceolata was a light-favoring species,and that the high relative growth rate(RGR)and photosynthetic capacity based on mass basis( Am) contributed to improve its competitiveness under high light environment. In partly shaded conditions,the significant decrease in RGR and Am of C. Lanceolata reduced its competitiveness. However, other traits related to biomass allocation and resource capture-related traits,such as leaf area ratio(LAR) ,stem mass ratio(SMR) ,leaf mass ratio(LMR)and specific leaf area(SLA) were not always higher for C. Lanceolata than for its co-occurring species even under high light environment. The reaction norm of C. Lanceolata to light showed a master-of-some-trades pattern, which means that C. Lanceolata could only in-crease population densities under favorable conditions.关键词
剑叶金鸡菊/生长/生物量分配/光合能力/入侵性Key words
Coreopsis Lanceoiata/ growth/ biomass allocation/ photosynthesis capacity/ invasiveness分类
农业科技引用本文复制引用
曾建军,肖宜安,孙敏..不同光强下入侵植物剑叶金鸡菊与伴生种生长和光合特征研究[J].广西植物,2011,31(5):646-650,5.基金项目
江西省教育厅科技项目(GJJ09661) （GJJ09661）
三峡库区生态环境与生物资源省部共建国家重点实验室开放基金(SKL-2010-04) [Supported by Science and Technoloy Program of Education Committee of Jangxi Province(G J09661) （SKL-2010-04）
Key Laboratory of Eco-environment in Three Gorges Reservior Region(MOE) (SKL-2010-04)] （MOE）
