北方农业学报2025，Vol.53Issue(4)：110-120,11.DOI:10.12190/j.issn.2096-1197.2025.04.10
不同遮阴条件下赛菊芋花叶突变体叶片光合特性分析
Analysis of photosynthetic characteristics of leaves of the variegated mutant of Heliopsis helianthoides under different shading conditions
摘要
Abstract
[Objective]To investigate the effects of different shading conditions on the photosynthetic characteristics of leaves in the variegated mutant of Heliopsis helianthoides,thereby providing a reference for its cultivation and application.[Methods]Using the variegated mutant HY-23F1-2 of H.helianthoides as the experimental material,three treatments were established:30%shading,50%shading,and 70%shading.The effects of different treatments on chlorophyll content,diurnal variations in photosynthetic physiological indices,photosynthetic light-response curves,and light-response parameters in the leaves of the variegated mutant of H.helianthoides were analyzed.[Results]Under the 50%shading treatment,the contents of total chlorophyll(Chlt),chlorophyll a(Chla),and chlorophyll b(Chlb)in the leaves of the variegated mutant HY-23F1-2 of H.helianthoides were significantly higher than those under the 30%and 70%shading treatments(P<0.05).The diurnal variations in net photosynthetic rate(Pn),stomatal conductance(Gs),and transpiration rate(E)all exhibited a bimodal pattern,with the highest average values of 8.79 μmol/(m2·s),0.37 mmol/(m2·s),and 6.62 mmol/(m2·s),respectively.The diurnal variation in intercellular CO2 concentration(Ci)showed a serrated pattern,with the lowest average value of 322.17 μmol/mol.The maximum net photosynthetic rate(Pnmax)and light saturation point(LSP)were the highest,at 14.50 and 1 802.74 μmol/(m2·s),respectively.Under the 70%shading treatment,the contents of Chlt,Chla,and Chlb were the lowest.The diurnal variation in Pn displayed a unimodal pattern,with the lowest average value of 4.63 μmol/(m2·s).The diurnal variation in Ci presented a W curve trend,with the highest average value of 342.97 μmol/mol.The apparent quantum yield(AQY)was the highest at 0.047 0 μmol/mol,while Pnmax,LSP,light compensation point(LCP),and dark respiration rate(Rd)were the lowest.Correlation analysis revealed extremely significant negative correlation between Pn and Ci(P<0.01).[Conclusion]The 50%shading treatment is more suitable for the growth of the variegated mutant HY-23F1-2 of H.helianthoides,and under the 70%shading treatment,the variegated mutant HY-23F1-2 of H.helianthoides exhibits stronger shade tolerance and photosynthetic potential.关键词
赛菊芋花叶突变体/叶绿素含量/光合生理指标日变化/光响应参数Key words
Variegated mutant of Heliopsis helianthoides/Chlorophyll content/Diurnal variations in photosynthetic physiological indices/Light-response parameters分类
农业科技引用本文复制引用
李莲,李子敬,别正伟,王羽,吉乃喆,许超,付怀军,秦贺兰..不同遮阴条件下赛菊芋花叶突变体叶片光合特性分析[J].北方农业学报,2025,53(4):110-120,11.基金项目
绿化植物育种北京市重点实验室林下栎类植物栽植关键技术研究(二期,YZZD202407) （二期,YZZD202407）
赛菊芋自育新种质栽培技术研究及多功能开发利用(YKYYB202505) （YKYYB202505）
北京市公园管理中心"新优园林植物花叶赛菊芋选种、育种和规模化繁殖研究"(ZX2021027) （ZX2021027）
北京市财政项目(11000024T000002866678) （11000024T000002866678）
