CAJ | 학술논문

利用稻/麦O_3-FACE(Ozone-free air controlled enrichment)平台,以武运粳21和两优培九两个耐性不同的水稻品种为材料,模拟研究了近地层大气臭氧浓度升高情形下对水稻叶片气体交换和荧光参数的影响.结果表明:高臭氧浓度降低了两个品种水稻叶片的净光合速率、气孔导度以及蒸腾速率,处理76天后,武运梗21的降幅分别为:21.7%,26.64%和24.74%,两优培九的降幅分别为:25.53%,30.31%和25.48%,而对两个品种胞间CO_2浓度的影响不显著;水稻叶片荧光动力学参数F_0(暗下初始荧光)、ETR(表观电子传递速率)和φ_(PSⅡ)(PSⅡ实际光化学量子产量)呈下降趋势,NPQ(非光化学猝灭系数)逐渐上升,处理76天后武运梗21和两优培九分别上升了16.37%和11.77%.臭氧的影响有一定的累积效应,随着处理时间的延长,相关指标变化幅度增大.高臭氧浓度下水稻叶片胞间CO_2浓度没有显著降低,推断臭氧导致的净光合速率的降低是由非气孔限制因素引起.结果表明,两优培九比武运粳21对臭氧响应敏感.
이용도/맥O_3-FACE(Ozone-free air controlled enrichment)평태,이무운갱21화량우배구량개내성불동적수도품충위재료,모의연구료근지층대기취양농도승고정형하대수도협편기체교환화형광삼수적영향.결과표명:고취양농도강저료량개품충수도협편적정광합속솔、기공도도이급증등속솔,처리76천후,무운경21적강폭분별위:21.7%,26.64%화24.74%,량우배구적강폭분별위:25.53%,30.31%화25.48%,이대량개품충포간CO_2농도적영향불현저;수도협편형광동역학삼수F_0(암하초시형광)、ETR(표관전자전체속솔)화φ_(PSⅡ)(PSⅡ실제광화학양자산량)정하강추세,NPQ(비광화학졸멸계수)축점상승,처리76천후무운경21화량우배구분별상승료16.37%화11.77%.취양적영향유일정적루적효응,수착처리시간적연장,상관지표변화폭도증대.고취양농도하수도협편포간CO_2농도몰유현저강저,추단취양도치적정광합속솔적강저시유비기공한제인소인기.결과표명,량우배구비무운갱21대취양향응민감.
O_3-FACE (Ozone-free air control enrichment) platform has been established for observing the effect of elevated tropo-spheric ozone concentration on the gas exchange and chlorophyll fluorescence of two rice varieties (Wuyunjing 21 and Liangyou-peijiu). The results showed that high ozone concentration decreased the net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) of rice leaves. After 76d fumigation the decline in them for Wuyunjing 21 was as follows:21.7%, 26.64% and 24.74% respectively, and that for Liangyoupeijiu was as follows: 25.53%, 30.31% and 25.48% respec-tively; however, no significant impact on leaf intercellular CO_2 concentration was observed. Chlorophyll fluorescence kinetics pa-rameters changed as can be seen by the decrease in F0 (initial fluorescence in the dark), ETR (The apparent electron transfer rate) and φ_(PSⅡ)(actual photochemical efficiency of PSⅡ in the light), and the increase in NPQ (non-photochemical quenching).After 76 days of O_3 treatment,the NPQ of Wuyunjing 21 and Liangyoupeijiu was enhanced by 16.37% and 11.77%, respective-ly. The impact of ozone on rice was a cumulative effect, and the extent of variation in the above parameters and the differences between the two varieties were enlarged as the O_3 treatment time increased) At the same time because the rice leaf intercellular CO_2 concentration did not significantly reduce, the inferred decrease in net photosynthetic rate was restricted by non-stomatal factors. The results of this experiment indicated that Liangyoupeijiu was more susceptible to ozone than Wuyunjing 21.