CAJ | 학술논문

以自然光照和遮荫环境下生长的寒富苹果为材料，通过气体交换和叶绿素荧光等方法测定了寒富苹果在干旱-复水处理过程中的光合特性。结果表明：干旱胁迫及复水过程中，净光合速率（Pn）、气孔导度（Gs）、胞间二氧化碳浓度（ Ci）、PSⅡ最大光化学效率（ Fv/Fm）、光合性能指数（ PI）等指标表现出先逐渐降低，极度干旱时达到最低值，复水后缓慢回升的趋势；处理结束后，其中全光照下建造的叶片Pn比处理前低41．4％，而遮荫低38．1％；随着干旱胁迫及胁迫解除，单位面积有活性的反应中心的密度（ RC/CSo ）、单位面积叶片吸收的能量（ ABS/CSo ）、热耗散的能量（DIo/CSo）均逐渐上升，达到最大值后缓慢下降，其中干旱胁迫7 d，不同光照环境下建造的叶片ABS/CSo和DIo/CSo达到差异极显著，这可能与前期叶片建造质量有较大关系。
이자연광조화차음배경하생장적한부평과위재료，통과기체교환화협록소형광등방법측정료한부평과재간한-복수처리과정중적광합특성。결과표명：간한협박급복수과정중，정광합속솔（Pn）、기공도도（Gs）、포간이양화탄농도（ Ci）、PSⅡ최대광화학효솔（ Fv/Fm）、광합성능지수（ PI）등지표표현출선축점강저，겁도간한시체도최저치，복수후완만회승적추세；처리결속후，기중전광조하건조적협편Pn비처리전저41．4％，이차음저38．1％；수착간한협박급협박해제，단위면적유활성적반응중심적밀도（ RC/CSo ）、단위면적협편흡수적능량（ ABS/CSo ）、열모산적능량（DIo/CSo）균축점상승，체도최대치후완만하강，기중간한협박7 d，불동광조배경하건조적협편ABS/CSo화DIo/CSo체도차이겁현저，저가능여전기협편건조질량유교대관계。
The photosynthetic characters of Hanfu apple leaves under different light conditions were studied by analyzing the gas exchange and chlorophyll fluorescence parameters .The result showed that the net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular corbon dioxide concentration (Ci),maximal photochemical effi-ciency ( Fv/Fm ) and photosynthetic performance index ( PI ) all decreased gradually in dought condition , and reached the lowest in extreme drought , but recovered slowly after rehydration .At the end of the treatment , Pn of leaves under the full light and shading conditions was respectively 41.4% and 38.1% lower than that before the treatment.Along with the drought stress and drought relief ,the density of SPⅡ reaction per excited cross section (RC/CSo),the energy absorbed per unit area (ABS/CSo) and the heat dissipation of energy (DIo/CSo) increased gradually ,and started to decline after they reached the highest .The differences of leaf ABS/CSo and DIo/CSo a-mong different lighting conditions reached a significant level after 7-days of drought stress ,which was probably relat-ed to the quality of leaves .