遮阴对猫爪草光合特性及叶片解剖结构的影响
Q945%Q944.5; [目的]探究不同遮阴程度对野生植物猫爪草光合特性和叶片解剖结构的影响,为深入了解其耐阴性以及开展规模化栽植提供理论基础.[方法]采用控制变量法,以盆栽猫爪草为试验材料,设置全光照(CK)、30％遮阴(T1)、50％遮阴(T2)、70％遮阴(T3)和90％遮阴(T4)5个处理,对各处理下叶片光合特性及解剖结构进行分析.[结果](1)随着遮阴程度增加,猫爪草叶面积在T3环境下达到最大值,而株高和茎粗逐渐降低.(2)随遮阴程度增加,叶片表观量子效率(AQE)先升后降,在T4处理下显著低于其他处理,而光饱和点(LSP)、光补偿点(LCP)、暗呼吸速率(Rd)和最大净光合速率(...
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| Published in | 西北植物学报 Vol. 44; no. 7; pp. 1055 - 1063 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
南京林业大学风景园林学院,南京 210037
2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-4025 |
| DOI | 10.7606/j.issn.1000-4025.20230640 |
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| Abstract | Q945%Q944.5; [目的]探究不同遮阴程度对野生植物猫爪草光合特性和叶片解剖结构的影响,为深入了解其耐阴性以及开展规模化栽植提供理论基础.[方法]采用控制变量法,以盆栽猫爪草为试验材料,设置全光照(CK)、30％遮阴(T1)、50％遮阴(T2)、70％遮阴(T3)和90％遮阴(T4)5个处理,对各处理下叶片光合特性及解剖结构进行分析.[结果](1)随着遮阴程度增加,猫爪草叶面积在T3环境下达到最大值,而株高和茎粗逐渐降低.(2)随遮阴程度增加,叶片表观量子效率(AQE)先升后降,在T4处理下显著低于其他处理,而光饱和点(LSP)、光补偿点(LCP)、暗呼吸速率(Rd)和最大净光合速率(Pn,max)逐渐降低;最大荧光(Fm)、可变荧光(Fv)、最大化学效率(Fv/Fm)和PSⅡ潜在活性(Fv/Fo)先升后降,初始荧光(F.)和热耗散的电子比率(φDo)则先降后升.(3)随着遮阴程度的增加,叶片气孔密度先减后增,并在T3处理达到最小值,上下表皮厚度和海绵组织厚度逐渐降低,组织结构紧密度(CTR)先降后升,组织结构疏松度(SR)先升后降.(4)叶片栅栏组织、海绵组织、叶片厚度及上、下表皮厚度与Rd呈极显著或显著正相关关系;海绵组织厚度、CTR和SR与Pn,max,以及栅海比(P/S)、SR与AQE均呈显著正相关关系;海绵组织厚度和SR与F.呈显著负相关关系.[结论]猫爪草可以通过降低光合速率和改变叶片结构提高耐阴性,在全光照下生长良好,也能较好地适应30％～70％遮阴环境. |
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| AbstractList | Q945%Q944.5; [目的]探究不同遮阴程度对野生植物猫爪草光合特性和叶片解剖结构的影响,为深入了解其耐阴性以及开展规模化栽植提供理论基础.[方法]采用控制变量法,以盆栽猫爪草为试验材料,设置全光照(CK)、30％遮阴(T1)、50％遮阴(T2)、70％遮阴(T3)和90％遮阴(T4)5个处理,对各处理下叶片光合特性及解剖结构进行分析.[结果](1)随着遮阴程度增加,猫爪草叶面积在T3环境下达到最大值,而株高和茎粗逐渐降低.(2)随遮阴程度增加,叶片表观量子效率(AQE)先升后降,在T4处理下显著低于其他处理,而光饱和点(LSP)、光补偿点(LCP)、暗呼吸速率(Rd)和最大净光合速率(Pn,max)逐渐降低;最大荧光(Fm)、可变荧光(Fv)、最大化学效率(Fv/Fm)和PSⅡ潜在活性(Fv/Fo)先升后降,初始荧光(F.)和热耗散的电子比率(φDo)则先降后升.(3)随着遮阴程度的增加,叶片气孔密度先减后增,并在T3处理达到最小值,上下表皮厚度和海绵组织厚度逐渐降低,组织结构紧密度(CTR)先降后升,组织结构疏松度(SR)先升后降.(4)叶片栅栏组织、海绵组织、叶片厚度及上、下表皮厚度与Rd呈极显著或显著正相关关系;海绵组织厚度、CTR和SR与Pn,max,以及栅海比(P/S)、SR与AQE均呈显著正相关关系;海绵组织厚度和SR与F.呈显著负相关关系.[结论]猫爪草可以通过降低光合速率和改变叶片结构提高耐阴性,在全光照下生长良好,也能较好地适应30％～70％遮阴环境. |
| Abstract_FL | [Objective]The study aims to investigate the effects of different shading levels on the photosyn-thetic characteristics and leaf anatomical structure of wild plant Ranunculus ternatus Thunb.and provide a theoretical basis for the in-depth understanding of its shading tolerance and large-scale planting.[Methods]This experiment adopts the method of controlling variables with R.ternatus Thunb.as materials.Five shading treatments full light(CK),30％shading(T1),50％shading(T2),70％shading(T3),and 90％shading(T4),were applied.[Results](1)With the increase of shading,the leaf area reached the maxi-mum under T3 environment.Plant height and stem diameter were decreased with the decrease of light.(2)With the increase of shading,the leaf apparent quantum efficiency(AQE)of R.ternatus was first in-creased and then decreased,and was lower than other treatments under T4 treatment.Light saturation point(LSP),light compensation point(LCP),dark respiration rate(Rd),and maximum net photosyn-thetic rate(P n,max)were decreased gradually.Maximum fluorescence(Fm),variable fluorescence(Fv),maximized chemical efficiency(Fv/Fm),and PS Ⅱ potential activity(Fv/Fo)were increased first and then decreased,while the electron ratio of heat dissipation(φDo)and the initial fluorescence(Fo)was decreased first and then increased.(3)With the increase of shading,the stomatal density of R.ternatus was first decreased and then increased,and reached the minimum value at T3 treatment.The thickness of the upper and lower epidermis and the thickness of the sponge gradually were decreased,the tissue structure com-pactness(CTR)was decreased first and then increased,and the tissue structure porosity(SR)was first increased and then decreased.(4)Leaf palisade tissue,sponge tissue,leaf thickness,and upper,and low-er epidermal thickness were positively correlated with Rd.Sponge tissue thickness(ST),CTR,and SR were positively correlated with Pn,maxP/S and SR were positively correlated with AQE.However,sponge tissue thickness(ST)and SR were negatively correlated with Fo.[Conclusion]R.ternatus can improve its shading tolerance by reducing photosynthetic rates and changing leaf structures;it grows well in full light and adapts to 30％-70％shading environment. |
| Author | 张鸽香 赵丹丹 王黎 |
| AuthorAffiliation | 南京林业大学风景园林学院,南京 210037 |
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| Author_FL | ZHANG Gexiang ZHAO Dandan WANG Li |
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| DocumentTitle_FL | Effects of shading on the photosynthetic characteristics and leaf structure of Ranunculus ternatus Thunb |
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| Keywords | shading 光合特性 叶片解剖结构 猫爪草 遮阴 Ranunculus ternatus Thunb leaf anatomical structure photosynthetic characteristics |
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| Title | 遮阴对猫爪草光合特性及叶片解剖结构的影响 |
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