摘要: |
为探究毛茛、华东唐松草和卵瓣还亮草三种毛茛科植物对不同光环境的响应机制,本研究设置5个遮阴处理水平(0%、30%、50%、70%和90%遮阴程度),测定三种植物的光合指标,研究不同遮阴处理对其光合特性的影响以及耐阴性评价。结果表明:随遮阴程度增加,(1)3种植物的叶绿素a、叶绿素b、叶绿素(a+b)和类胡萝卜素含量呈上升趋势,而叶绿素a/b含量则下降。(2)3种植物的AQE均先上升后下降;毛茛和卵瓣还亮草Pnmax呈先升后降的变化趋势,华东唐松草的Pnmax呈下降趋势;3种植物的LSP、LCP、Rd则均逐渐降低。(3)三种植物的Fo先下降后上升,Fm、Fv、Fv/Fm和Fv/Fo值则先上升后下降;φDo、DIo/RC呈先下降后上升的变化趋势,φEo、ABS/RC、TRo/RC、ETo/RC、PIabs及PItotal呈先上升后下降趋势。(4)利用主成分分析、隶属函数法等分析方法对20个单指标进行综合分析,三种植物的耐阴性排序为:华东唐松草>卵瓣还亮草>毛茛。综上结果认为,三种毛茛科植物对光照有着不同的适应能力,该结论为毛茛科植物在园林绿化的应用中提供了依据。 |
关键词: 毛茛科,遮阴,光合特性,耐阴性,评价 |
DOI: |
分类号:Q945.11 |
基金项目:国家重点研发计划课题:乡村植物景观营造及应用技术研究(2019YFD1100404) |
|
Effect of shading on photosynthetic characteristics and negative tolerance evaluation of three ranunculaceae plants |
HAN ruiting, ZHAO dandan, ZHANG gexiang, WANG weiyi
|
|
Abstract: |
In order to investigate the response mechanism of Ranunculus japonicus, Thalictrum fortunei and Delphinium anthriscifolium var. savatieri in different light environments, five shade treatment levels (0%, 30%, 50%, 70% and 90% shade degree) were set in this study, the photosynthetic indexes of the three plants were determined, and the effects of different shade treatments on their photosynthetic characteristics and shade-tolerance evaluation were studied.The results showed that with the increase of shading degree, (1) The contents of chlorophyll a, chlorophyll b, chlorophyll (a+b) and carotenoid increased, while the contents of chlorophyll a/b decreased. (2) The AQE of the three plants increased first and then decreased;The Pnmax of R. japonicus and D. anthriscifolium var. savatieri showed a trend of first rising and then decreasing, while the Pnmax of T. fortunei showed a decreasing trend. The LSP, LCP and Rd of the three plants decreased gradually. (3) Fo decreased first and then increased, while Fm, Fv, Fv/Fm and Fv/Fo values increased first and then decreased; φDo and DIo/RC decreased first and then increased, while φEo, ABS/RC, TRo/RC, ETo/RC, PIabs and PItotal increased first and then decreased. (4) Through comprehensive analysis of 20 single indicators by using analysis methods such as principal component analysis and membership function method. The shade-tolerance of the three plants ranked as T. fortunei > D. anthriscifolium var. savatieri > R. japonicus. In conclusion, the three species of goldenseal have different adaptability to light, which provides a basis for the application of goldenseal in landscaping. |
Key words: Ranunculaceae, shading, photosynthetic characteristics, shade-tolerance, evaluation |