【作者】 聂磊； 李淑仪； 廖新荣； 孙谷畴；

【Author】 Nie Lei Li Shuyi Liao Xinrong Sun Guchou( South China Institute of Botany, Academia Sinica, Guangzhou 510650; Guangdong Institute of Ecological and Soil Science , Guangzhou510650)

【机构】 中国科学院华南植物研究所； 广东省生态环境与土壤研究所；

【摘要】 稀土处理提高了沙田柚叶片的Fv/Fm、ΦPSⅡ和QN,从而增强了光合系统的光能转换效率;提高叶片的硝酸还原酶（NR）、亚硝酸还原酶（NiR）和谷氨酸脱氢酶（GDH）活性,在最适稀土浓度处理下,NR和NiR比对照提高了148%和64%,达到极显著水平,表明稀土可以明显促进叶片氮代谢水平;超氧物岐化酶（SOD）、过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）活性在最适稀土深度处理下比对照提高了65%、24%和94%,说明稀土增强了沙田柚叶片抗氧化能力.高浓度稀土处理(1500mg·L^-1)对沙田柚表现出抑制效果,建议稀土处理浓度为600～800mg·L^-1.更多还原

【Abstract】 Effects of rare earth on Shatianyou were studied with leaf spraying. The results indicated that Fv/Fm,ΦPS Ⅱ and QN were increased, and the efficiency of light conversion was improved by rare earth treatment. Rare earth increased NR, NiR and GDH activities. The activities of NR and NiR were increased significantly by 148% and 64% ,respectively, at the suitable concentrations compared with control. It is suggested that rare earth significantly improved nitrogen metabolism, increased the activities of SOD、CAT and APX,and enhanced the level of antioxidation. Rare earth appeared to inhibit shatianyou at high concentration (1500mg·L～(-1)) .600 ～ 800mg·L～(-1) rare earth spraying was therefore suggested on Shatiany-ou.更多还原