CAJ | 학술논문

毛瓣金花茶为山茶科山茶属植物,该研究分别对野生种群和栽培种群的毛瓣金花茶及其同属广布种茶的光合特性进行了测定及差异比较.结果表明：在野生和栽培环境下,毛瓣金花茶的光补偿点(LCP)(分别为1．17和3．87μmol?m-2?s-1)和光饱和点(LSP)(分别为395．8和423．6μmol?m-2?s-1)均较低,最大净光合速率(Pmax)(分别为4．25和3．91μmol?m-2?s-1)较小,是典型的阴生植物；而茶的LCP(分别为6．57和9．09μmol?m-2?s-1)较低,LSP(分别为765．0和809．6μmol?m-2?s-1)较高,Pmax(分别为9．37和9．75μmol?m-2?s-1)较大,为耐荫植物.野生和栽培的毛瓣金花茶的Pmax、表观量子效率(AQY)、最大羧化速率(Vcmax)、最大电子传递速率(J max)和潜在最大净光合速率(Pmax)均显著低于茶(P＜0．05),这表明毛瓣金花茶的光合能力和CO2利用能力都比茶要弱.栽培的毛瓣金花茶叶片的 Chla、Chlb、Chl(a＋b)含量与茶相比无显著差异(P＞0．05),表明毛瓣金花茶较低的光合能力与其叶绿素含量无关.野生和栽培的毛瓣金花茶的叶面积与茶相比无显著差异(P＞0．05),而比叶重则显著高于茶(P＜0．05),与茶相比,毛瓣金花茶对光强的适应范围狭窄,光合能力和CO2利用能力低下,这可能是其分布狭窄的重要生理原因.
모판금화다위산다과산다속식물,해연구분별대야생충군화재배충군적모판금화다급기동속엄포충다적광합특성진행료측정급차이비교.결과표명：재야생화재배배경하,모판금화다적광보상점(LCP)(분별위1．17화3．87μmol?m-2?s-1)화광포화점(LSP)(분별위395．8화423．6μmol?m-2?s-1)균교저,최대정광합속솔(Pmax)(분별위4．25화3．91μmol?m-2?s-1)교소,시전형적음생식물；이다적LCP(분별위6．57화9．09μmol?m-2?s-1)교저,LSP(분별위765．0화809．6μmol?m-2?s-1)교고,Pmax(분별위9．37화9．75μmol?m-2?s-1)교대,위내음식물.야생화재배적모판금화다적Pmax、표관양자효솔(AQY)、최대최화속솔(Vcmax)、최대전자전체속솔(J max)화잠재최대정광합속솔(Pmax)균현저저우다(P＜0．05),저표명모판금화다적광합능력화CO2이용능력도비다요약.재배적모판금화다협편적 Chla、Chlb、Chl(a＋b)함량여다상비무현저차이(P＞0．05),표명모판금화다교저적광합능력여기협록소함량무관.야생화재배적모판금화다적협면적여다상비무현저차이(P＞0．05),이비협중칙현저고우다(P＜0．05),여다상비,모판금화다대광강적괄응범위협착,광합능력화CO2이용능력저하,저가능시기분포협착적중요생리원인.
The photosynthetic characteristics of the endangered species Camellia pubipetala and its widespread conge-ner C.sinensis in both wild and cultivated populations were studied.The results showed that the wild and cultivated C.pubipetala had low light compensation point (LCP)(1.17 and 3.87 μmol?m-2 ?s-1,respectively),light saturation point (LSP)(395.8 and 423.6μmol?m-2?s-1 ,respectively),and maximum photosynthetic rate (Pmax)(4.25 and 3.91μmol?m-2?s-1 ,respectively)indicating that it was a shade plant,while C.sinensis had relatively low LCP (6.57 and 9.09μmol?m-2?s-1 ,respectively),high LSP (765.0 and 809.6μmol?m-2?s-1 ,respectively)and Pmax(9.37 and 9.75μmol?m-2?s-1 ,respectively)meaning that it was a shade tolerance plant.In comparison with C.sinensis,C.pubipetala had a significantly lower Pmax,apparent quantum yield (AQY),maximum carboxylation rate (Vcmax),electronic transport rate (J max)and potential maximum photosynthetic rate (Pmax)in wild and cultivated populations.The photosynthetic and CO2 utilization capacity of C.pubipetala were significantly lower than those of C.sinensis.The contents of chlorophyll a,chlorophyll b and chlorophyll (a+b)in leaves of C.pubipetala were not significantly different from those of C.sinensis in cultivated population,which indicated that the low photosynthetic capacity of C.pubipetala had nothing to do with its chlorophyll content.There was no significant difference in single leaf area of the two plant species in both wild and cultivated population,while the leaf mass per area (LMA)of C.pubipetala was significantly higher than that of C.sinensis.Thus,it is inferred that in comparison with C.sinen-sis,the narrow adaptation range of light,low photosynthetic and CO2 utilization capacity in C.pubipetala may be re-sponsible for its narrow distribution.