CAJ | 학술논문

研究了4个不同叶色水稻品系孕穗期不同叶位叶片的光合和叶绿素荧光特性，结果表明：SPAD值最高的深叶色品系净光合速率并不是最高，说明叶绿素总量高其净光合速率并不一定最高；荧光参数在深叶色品系与浅叶色品系间差异也不显著；各品系间倒1叶净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Evap)均明显低于倒2叶；而胞间CO2浓度(Ci)基本维持不变，说明叶片Pn 的变化主要不是气孔因素引起的。不同叶位叶绿素含量降低与Pn下降的表现一致，叶绿素荧光分析表明Fo、Fm、Fv/ Fm 和PI随叶位发生变化，而每个品系倒1叶的Fm均大于倒2叶，这表明孕穗期倒1叶PS域电子传递的潜力强于倒2叶。不同叶色品系中，除沈农07015外，反映光合荧光参数中光合有活反应中心吸收(ABS/RC)、耗散(DIo/RC)的能量和用来还原QA的激发能(TRo/RC)均为倒1叶大于倒2叶，表明倒1叶有活性的反应中心剩余的耗能效率高于倒2叶。
연구료4개불동협색수도품계잉수기불동협위협편적광합화협록소형광특성，결과표명：SPAD치최고적심협색품계정광합속솔병불시최고，설명협록소총량고기정광합속솔병불일정최고；형광삼수재심협색품계여천협색품계간차이야불현저；각품계간도1협정광합속솔(Pn)、기공도도(Gs)화증등속솔(Evap)균명현저우도2협；이포간CO2농도(Ci)기본유지불변，설명협편Pn 적변화주요불시기공인소인기적。불동협위협록소함량강저여Pn하강적표현일치，협록소형광분석표명Fo、Fm、Fv/ Fm 화PI수협위발생변화，이매개품계도1협적Fm균대우도2협，저표명잉수기도1협PS역전자전체적잠력강우도2협。불동협색품계중，제침농07015외，반영광합형광삼수중광합유활반응중심흡수(ABS/RC)、모산(DIo/RC)적능량화용래환원QA적격발능(TRo/RC)균위도1협대우도2협，표명도1협유활성적반응중심잉여적모능효솔고우도2협。
Four rice genotypes w ith different leaf colors were examined at booting stage for investigating the photosynthesis and chlorophyll fluorescence properties of different position leaves. The dark-green leaf rice genotype had the highest SPA D value, but not highest net photosynthetic rate (Pn), which suggested that the genotype with the highest chlorophyll content didn't mean the highest Pn. There were no significant differences in fluorescence parameters between dark-green leaf color and light leaf color genotypes.The Pn, stomatal conductance (Gs) , transpiration rate (Evap) of the first leaf were significantly lower than that of the second leaf, while the intercellular CO2 concentration (Ci) had little change, which indicated that the decrease of Pn did not result from the decrease of Gs. The decrease of SPAD value that has a close correlation with chlorophyll content was one of the apparent reasons resulted in decease of Pn. Further evidence from chlorophyll fluorescence showed that the Fo, Fm, Fv/Fm and PI changed with the leaf position but the Fm of the first leaf in the four genotypes was bigger than that of the second leaf, which showed that PSIIelectron transport potential of the first leaf was stronger than that of the second leaf. The absorption per active reactions centers (ABS/RC), dissipation per active reaction centers (DIo/RC) and happing per active reaction centers (TRo/RC) in the first leaf were higher than those in the second leaf in three rice genotypes except Shennong07015, which showed that the remainder energy dissipation efficiency in per active reaction centers in the first leaf was higher than that of the second leaf.