摘要
【目的】了解河北3个不同地区(邯郸、衡水和沧州)菊科入侵植物黄顶菊和其本地伴生植物苍耳光合特性的差异,探讨黄顶菊与本地种对环境光强变化产生的响应机制,综合分析入侵植物的光合特性及其与叶片特性之间的相关性。【方法】采用Li-6400便携式光合测定仪测定黄顶菊和苍耳叶片的净光合速率、蒸腾速率、气孔导度等指标,并比较分析入侵植物与本地种光合特性及叶片特性的差异。【结果】3个地区的2种植物光饱和点均高于1200μmol·m-2·s-1,且邯郸和衡水地区的黄顶菊光饱和点显著高于本地种苍耳达221.8%、122.9%;3个地区黄顶菊的光补偿点显著低于苍耳,而最大净光合效率则显著高于苍耳,但叶绿素含量差异并不显著;除邯郸地区外,黄顶菊的比叶面积、光合氮利用效率均要显著高于苍耳,各地区黄顶菊的叶片氮含量、叶片磷含量、光合能量利用效率均显著高于本地种。相关分析表明,叶片最大净光合速率与叶片建成成本、叶片氮含量、叶片磷含量、光合能量利用效率以及光合氮利用效率显著正相关(P<0.05);比叶面积与光合能量利用效率呈显著正相关(P<0.05),与光合氮利用效率呈极显著正相关(P<0.01)。【结论】黄顶菊在同一环境条件下比苍耳有着更高的光合速率、光合能量利用效率以及光合氮利用效率,成为其具备高入侵性的生理基础。
【Aim】To elucidate photosynthesis-related traits in invasiveness of the invasive plant Flaveria bidentis,we compared the difference in these traits between this invader and a co-occurring dominant native plant Xanthium sibiricum from three different areas in Hebei Province.【Method】Key photosynthesis-related traits,including net photosynthetic rate,transpiration rate and stomatal conductance,were determined in the leaves of F.bidentis and X.sibiricum under different light intensity under field conditions.【Result】The light saturation point(LSP)of the two species from three areas were all higher than 1200μmol·m-2·s-1,and the LSP of F.bidentis was significantly higher than that of native species in Handan and Hengshui by 221.8%and 122.9%,respectively.Moreover,F.bidentis also had a significant lower light compensation point than X.sibiricum in all three areas.As a result,the maximum net photosynthetic(P nmax)of F.bidentis in three areas was significantly higher than that of X.sibiricum by 42.8%,221.8%,and 122.9%,respectively.There was no difference in chlorophyll content between invasive and native plants in three areas,and F.bidentis operated lower apparent quantum yield than native species did.The invasive plants generally had higher specific leaf area(SLA),photosynthetic nitrogen use efficiency(PNUE),leaf nitrogen content(N mass),leaf phosphorus content(P mass),photosynthetic energy utilization efficiency(PEUE)than the co-occurring native,and significant differences in these traits were detected in Hengshui and Cangzhou.Correlation analysis indicated that the plants P nmax was positively correlated with blade construction cost(CC mass),N mass,P mass,PEUE and PNUE;leaf SLA was positively correlated with PEUE and PNUE.【Conclusion】Under the same environmental conditions,F.bidentis has higher photosynthetic rate,PEUE and PNUE than native X.sibiricum,potentially contributing to its invasion success in these areas.
作者
贾璇
皇甫超河
JIA Xuan;HUANGFU Chaohe(School of Resources and Environmental Engineering,Anhui University,Hefei,Anhui 230031,China;Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191,China)
出处
《生物安全学报》
CSCD
2019年第3期217-224,共8页
Journal of biosafety
基金
公益性行业(农业)科研专项(201103027、200803022)
天津市自然科学基金项目(12JCQNJC09800)
关键词
菊科入侵植物
叶片特性
最大净光合速率
光合特性
相关分析
Asteraceae invasive plants
leaf traits
maximum net photosynthetic rate
gas exchange characteristics
correlation analysis
