摘要
本研究以入侵植物大狼耙草(Bidens frondosa L.)及其伴生种山莴苣(Lactuca indica L.)为试材,研究了不同光照强度(14%~100%)下两种植物植株形态和生物量积累与分配特性的差异,结合可塑性指数评价,探讨了大狼耙草对光照强度的适应性。实验结果表明:在弱光条件下,大狼耙草和山莴苣的株高、冠幅、冠面积、总生物量、叶面积比、叶根比、茎生物量比、根生物量比和叶重分数等指标均高于全光照。结合可塑性指数分析发现,大狼耙草在冠幅、冠面积、叶面积等指标上表现出更强的表型可塑性,而山莴苣在株高、总生物量等方面更具优势。因此,适度的遮阴有利于大狼耙草的生长和生物量的积累,大狼耙草和山莴苣对光照强度均具有较强适应性,但策略各异。
Taking the invasive plant Bidens frondosa L.and its companion species Lactuca indica L.as test materials,the differences of plant morphology and biomass accumulation and allocation characteristics of the two plants under different light intensities(14%-100%)were investigated.Combined with plasticity index evaluation,the adaptability of B.frondosa to light intensity was discussed.The results showed that under low light conditions,the plant height,crown width,crown area,total biomass,leaf area ratio,leaf root ratio,stem biomass ratio,root biomass ratio and leaf weight fraction of B.frondosa and L.indica were higher than those under full light.Combined with the analysis of plasticity index,it was found that B.frondosa showed stronger phenotypic plasticity in crown width,crown area,leaf area and other indicators,while L.indica had more advantages in plant height and total biomass.Therefore,moderate shading is beneficial to the growth and biomass accumulation of B.frondosa.B.frondosa and L.indica both have strong adaptability to light intensity,but the strategies are different.
作者
肖海艳
王一冰
廖炟
孙誉菡
闫小红
周兵
XIAO Haiyan;WANG Yibing;LIAO Da;SUN Yuhan;YAN Xiaohong;ZHOU Bing(School of Life Sciences,Jinggangshan University,Ji’an,Jiangxi 343009,China;Key Laboratory of Jiangxi Province for Biological Invasion and Biosecurity,Ji’an,Jiangxi 343009,China;Tongliao Meteorological Bureau,Tongliao,Inner Mongolia 028006,China)
出处
《井冈山大学学报(自然科学版)》
2026年第2期62-70,共9页
Journal of Jinggangshan University (Natural Science Edition)
基金
国家自然科学基金项目(31760122)
江西省自然科学基金项目(20212BAB205018)
江西省教育厅科技计划项目(GJJ211013)
井冈山大学博士科研启动项目(JZB1814)。
关键词
大狼耙草
入侵
光照强度
生物量分配
适应性
Bidens frondosa L.
invasion
light intensity
biomass allocation
adaptability
