CAJ | 학술논문

于2013年6月（花期）、8月（果实膨大期）和9月（果实成熟期）份对3年生幼龄期滇重楼和8年生成熟期滇重楼光合生理指标日变化和光响应参数进行了测定。结果表明：幼龄期和成熟期滇重楼叶片净光合速率（ Pn ）变化日进程在6月份出现严重午休，仅在10：00出现一个峰值；而在8、9月份上午和下午各出现一个峰值，在中午出现“午休”现象。空气温度（Ta）偏高引起气孔关闭是导致滇重楼“午休”的主要因素。成熟期滇重楼叶片在不同生长季节日均Pn和最大净光合速率（Pnmax）均高于幼龄期叶片，而幼龄期滇重楼初始量子效率较高，且光补偿点和光饱和点均低于成熟期滇重楼，对弱光的利用率更高。幼龄期和成熟期滇重楼叶片日均Pn 在8月下旬最大，其次是6月下旬，9月下旬最低，且在当年的生育后期，光饱和点有增大的趋势，由大到小的顺序为9月份、8月份、6月份。成熟期滇重楼花萼具有同叶片类似的同化功能，日均Pn 为叶片的779．％～104．0％，但其Pnmax和光饱和点均低于成熟期和幼龄期叶片的，对弱光的利用效率高于叶片。
우2013년6월（화기）、8월（과실팽대기）화9월（과실성숙기）빈대3년생유령기전중루화8년생성숙기전중루광합생리지표일변화화광향응삼수진행료측정。결과표명：유령기화성숙기전중루협편정광합속솔（ Pn ）변화일진정재6월빈출현엄중오휴，부재10：00출현일개봉치；이재8、9월빈상오화하오각출현일개봉치，재중오출현“오휴”현상。공기온도（Ta）편고인기기공관폐시도치전중루“오휴”적주요인소。성숙기전중루협편재불동생장계절일균Pn화최대정광합속솔（Pnmax）균고우유령기협편，이유령기전중루초시양자효솔교고，차광보상점화광포화점균저우성숙기전중루，대약광적이용솔경고。유령기화성숙기전중루협편일균Pn 재8월하순최대，기차시6월하순，9월하순최저，차재당년적생육후기，광포화점유증대적추세，유대도소적순서위9월빈、8월빈、6월빈。성숙기전중루화악구유동협편유사적동화공능，일균Pn 위협편적779．％～104．0％，단기Pnmax화광포화점균저우성숙기화유령기협편적，대약광적이용효솔고우협편。
We studied the diurnal changes in the photosynthetic characteristics and responses to changes in light intensity of three year-old ( juvenile stage) and eight year-old ( maturation stage) Pairs polyphylla var.yunnanensis in June ( flowering peri-od) , August ( fruit swelling period) and September ( fruit ripening period) , 2013.Both the diurnal variation of the net photosynthetic rate ( Pn ) of leaf in juvenile stage and maturation stage exhibited a single peak value at 10:00 with serious midday depression in June, and double peak values at 10:00 and 14:00 with midday depression at 12:00 both in August and September, respectively.Stomatal closure due to high air temperature was the main factor that resulted in midday de-pression of photosynthesis of P.polyphylla var.yunnanensis.During different development periods annually, both daily av-erage Pn and maximum Pn of leaf in maturation stage were higher than those in juvenile stage.The higher initial quantum yield but lower light saturation point and light compensation point of leaf in juvenile stage indicated a higher utilization effi-ciency to weak light for P.polyphylla var.yunnanensis in juvenile stage compared with that in maturation stage.Both daily average Pn of leaf in juvenile stage and maturation stage were highest in August, higher in June and lowest in September, and the light saturation point of leaf in annual later period was on an ascending trend of September>August>June.The ca-lyx of P.polyphylla var.yunnanensis in maturation stage possesses the similar assimilation function to leaf.Daily average Pn of the calyx were 77.9%-104.0%of the value of the leaf, and both the lower maximum Pn and light saturation point indi-cated high utilization efficiency to weak light for calyx.