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以1年生澳大利亚‘太阳扇’(Scaevola aemula‘Sunfan’)扦插苗为试验材料,研究了(10,50,100,200,300)mg/L矮壮素(CCC)处理对Sunfan叶片叶绿素a(Cha),叶绿素b(Chb),叶绿素总量(Chl)和叶绿素荧光参数[PSⅡ的最大光化学效率Fv/Fm,PSⅡ天线转化效率Fv′/Fm′,潜在光化学活性Fv/Fo,实际光化学效率ΦPSⅡ,电子传递速率ETR,光化学猝灭qP,非光化学猝灭NPQ,PSⅡ处调节性能量耗散的量子产量Y(NPQ)]的影响.结果表明:(10,50,100,200,300)mg/L CCC处理均可显著提高Sunfan叶片的Cha,Chb,Chl,Fv/Fm,Fv′/Fm′,Fv/Fo,ΦPSⅡ,ETR,qP(p<0.05),且均随着CCC质量浓度的增加呈先增大后减小趋势;CCC处理可显著降低Y(NPQ),NPQ(p<0.05),且均随着CCC质量浓度的增加呈递减趋势.当质量浓度为200 mg/L时,Cha,Chb,Chl,Fv/Fm,Fv′/Fm′,Fv/Fo,ΦPSⅡ,ETR达到最大值.相关分析表明,Cha,Chb,Chl均与Fv/Fm,Fv′/Fm′,Fv/Fo,ETR,ΦPSⅡ,qP呈极显著正相关(p<0.01),但与NPQ均呈负相关,与Y(NPQ)均呈显著负相关(p<0.05).由回归分析可知,Cha随着Fv/Fm值,qP值的增加而增加;Chb随着Fv/Fm值的增加而增加;Chl随着Fv/Fm值,qP值的增加而增加.
The effects of 10, 50, 100, 200 and 300 mg / L CCC treatments on the leaf color of the leaves of Sunfan were studied using the cuttings of one-year Australian ’Scaevola aemula’ Sunfan as test material. Chb, Chl and chlorophyll fluorescence parameters [maximum photochemical efficiency Fv / Fm, PSII antenna conversion efficiency Fv ’/ Fm’, potential photochemical activity Fv / Fo, actual photochemical efficiency ΦPSⅡ, electron transfer rate ETR, Photochemical quenching (qP), non-photochemical quenching (NPQ) and quantum yield Y (NPQ) of regulatory energy dissipation at PSII]. The results showed that (10,50,100,200,300) mg / L CCC treatment significantly increased Cha Fc / Fm / Fv / Fo / ΦPSⅡ / ETR / qP (p <0.05), all of which increased first and then decreased with the increase of CCC concentration. CCC treatment (NPQ) and NPQ (p <0.05) decreased with the increase of CCC concentration.When the concentration of CC was 200 mg / L, the contents of Cha, Chb, Chl, Fv / Fm and Fv ’ Fm, Fv, Fo, ΦPSⅡ and ETR reached the maximum value.Correlation analysis showed that Cha, Chb and Chl were significantly and positively correlated with Fv / Fm, Fv / Fm, Fv / Fo, ETR, (p <0.01), but negative with NPQ , And Y (NPQ) respectively (p <0.05) .Correlation analysis showed that Cha increased with the increase of Fv / Fm and qP values; Chb increased with the increase of Fv / Fm value; Chl With the Fv / Fm value, qP value increases.