3种毛茛科地被植物对遮阴的生理响应及耐阴性评价  

Physiological response and shade tolerance of three Ranunculaceae ground cover plants under different shading treatments

作　　者：赵雪瑶 赵丹丹 张鸽香[1] ZHAO Xueyao;ZHAO Dandan;ZHANG Gexiang(College of Landscape Architecture,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)

机构地区：[1]南京林业大学风景园林学院,江苏南京210037

出　　处：《草业科学》2024年第12期2880-2890,共11页Pratacultural Science

基　　金：南京市绿化园林局“南京地区野生花卉资源调查及引种栽培研究”项目(066018K60721)。

摘　　要：为探究3种毛茛科野生地被植物在不同遮阴条件下的耐阴状况,以毛茛(Ranunculus japonicus)、华东唐松草(Thalictrum fortunei)和卵瓣还亮草(Delphinium anthriscifolium var.savatieri)为试验材料,以全光照为对照(CK),人工搭棚设置30%、50%、70%和90%遮阴处理,测定上述3种毛茛科植物的形态和生理指标并进行耐阴性综合分析,确定3种植物的耐阴性强弱。结果表明,随着遮阴程度增加,3种毛茛科植物的叶面积、叶长、叶宽、株高、株幅、茎粗总体呈先升后降的趋势;过氧化物酶(POD)活性、丙二醛(MDA)含量总体呈先降后升的趋势;比叶重呈下降趋势。随着遮阴程度的增加,毛茛和卵瓣还亮草的超氧化物歧化酶(SOD)活性总体呈下降趋势,华东唐松草的SOD活性呈先降后升的趋势;毛茛的过氧化氢酶(CAT)活性呈下降趋势,华东唐松草和卵瓣还亮草的CAT活性呈先降后升的趋势;毛茛和华东唐松草脯氨酸(Pro)含量呈先降后升的趋势,卵瓣还亮草的Pro含量呈下降趋势。不同植物各指标的变化存在差异,通过隶属函数法进行耐阴性综合评价,结果显示,3种植物的耐阴性存在差异,3种毛茛科植物耐阴性强弱表现为华东唐松草>卵瓣还亮草>毛茛。本研究结果可为其在不同遮阴程度的环境下栽培提供理论参考。This study investigated the shade tolerance of three wild ground cover plants in the family Ranunculaceae under different shade conditions.Ranunculus japonicus,Thalictrum fortunei,and Delphinium anthriscifolium var.savatieri were used as test materials.The plants were grown in an artificial shed and subjected to four shading treatments:30%,50%,70%,and 90%shade,with full light as the control.The morphological and physiological indexes of the test materials were determined,and their shade tolerance was analyzed comprehensively.As the shading rate increased,several effects were observed.For all three species tested,the leaf area,leaf length,leaf width,plant height,plant width,and stem diameter first increased then decreased;peroxidase activity and malondialdehyde content first decreased then increased;and the specific leaf weight decreased.The superoxide dismutase activity of R.japonicus and D.anthriscifolium var.savatieri decreased gradually,while that of T.fortunei first decreased then increased.The catalase activity of R.japonicus decreased,while those of T. fortunei and D. anthriscifolium var. savatieri first decreased then increased. The proline content of R. japonicus and T. fortunei first decreased then increased, while that of D. anthriscifolium var. savatieri decreased gradually. Changes in the morphological and physiological indexes varied between the three plant species. A comprehensive evaluation of shade tolerance using the membership function method showed that shade tolerance followed the order T. fortunei > D. anthriscifolium var. savatieri > R. japonicus. The different degrees of negative tolerance shown by the three plant species can provide a theoretical reference for cultivating them under different shade conditions.

关 键 词：毛茛科 野生地被 生长指标 生理指标 耐阴性 隶属函数分析 综合评价 

分 类 号：Q94[生物学—植物学]