CAJ | 학술논문

采用人工遮阴的方式设置了3个光照强度，模拟药用青钱柳在矮化及不同栽植密度下的光环境，研究其光合和荧光特性、叶片形态和解剖结构、光合器官的成分和结构以及生长和生物量积累对不同光照强度的响应。结果表明：随着光照强度的减弱，青钱柳苗的净光合速率、非光化学猝灭系数、气孔密度、叶片厚度、栅栏组织宽度、地径、生物量及比叶质量均显著下降，在叶绿体中积累的淀粉粒数量也明显减少。但随着遮阴的加强，遮阴植株具有更高的PSII量子产率、光化学猝灭系数、叶绿素总量。此外，在弱光条件下，叶绿体中含有大量发育完好的基粒内囊体、叶绿素质量分数和叶绿素b的比例更高。适度遮阴（一层遮阴）条件下，青钱柳苗的树高生长、叶面积、叶总生物量比最大，而根总生物量比和根冠生物量比最小。
채용인공차음적방식설치료3개광조강도，모의약용청전류재왜화급불동재식밀도하적광배경，연구기광합화형광특성、협편형태화해부결구、광합기관적성분화결구이급생장화생물량적루대불동광조강도적향응。결과표명：수착광조강도적감약，청전류묘적정광합속솔、비광화학졸멸계수、기공밀도、협편후도、책란조직관도、지경、생물량급비협질량균현저하강，재협록체중적루적정분립수량야명현감소。단수착차음적가강，차음식주구유경고적PSII양자산솔、광화학졸멸계수、협록소총량。차외，재약광조건하，협록체중함유대량발육완호적기립내낭체、협록소질량분수화협록소b적비례경고。괄도차음（일층차음）조건하，청전류묘적수고생장、협면적、협총생물량비최대，이근총생물량비화근관생물량비최소。
A light controlled trial with three light gradients (100%, 50%and 15%of natural sunlight) was conducted to simu-late the light conditions under different planting density and coppice management.We studied the responses of Cyclocarya paliurus seedlings in photosynthesis, fluorescence characteristics, leaf morphology and anatomy, chloroplast ultrastructural and compositions, growth, and biomass accumulation to three light intensity levels in shading shelter.The net photosyn-thetic rate, non-photochemical quenching ( NPQ) , stomata density on unit leaf area, leaf thickness, palisade parenchyma length, basal diameter growth, biomass accumulation, specific leaf weight and starch grains in chloroplast were significant-ly decreased with the decline of light intensity.However, with the increasing of shading level, shading plants possessed higher values of quantum yield of PSII, photochemical quenching and total chlorophyll content.We detected a large num-ber of well-developed grana stacks and higher proportion of chlorophyll b in shade-type chloroplast grown under shading conditions, and the highest tree height, leaf area and leaf-total biomass ratio under the medium shading ( one shading net) , while the root-total biomass ratio and root-top biomass ratio were the lowest.The adaptive changes of C.paliurus un-der low light intensity allowed shading plants more efficiently capturing and transferring the limited photon flux, and hence, the plants could obtain optimum ecological adaptability in low light environment.However, the growth and biomass accu-mulation of C.paliurus under heavy shading were severely inhibited, while the leaf biomass accumulation under medium shading was not significantly influenced.