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UV-B辐射增强对水稻多胺代谢及内源激素含量的影响
引用本文:林文雄,吴杏春,梁康迳,郭玉春,何华勤,陈芳育,梁义元.UV-B辐射增强对水稻多胺代谢及内源激素含量的影响[J].应用生态学报,2002,13(7):807-813.
作者姓名:林文雄  吴杏春  梁康迳  郭玉春  何华勤  陈芳育  梁义元
作者单位:福建农林大学生命科学学院,福州,350002
基金项目:国家自然科学基金 ( 3 9970 44 1 ),教育部优秀年轻教师基金资助项目
摘    要:研究表明,在处理前期(7-14d),增强的UV-B辐射能使供试水稻汕成63(Sy63)的精氨酸脱羧酶(ADC)、鸟氨酸脱羧酶(ODC)和s-腺苷蛋氨酸脱羧酶(SAMDC)活性分别平均增加165.74%、104.60%和89.60%,南川(NC)的这3种酶活性分别增加59.91%、41.30%和23.68%,IR65600-85只表现出ADC和ODC活性分别平均提高115.93%、14.45%,SAMDC活性却下降33.01%,在处理后期(21-28d),Sy63的ADC-ODC活性分别对照平均增加89.72%、3.71%,NC则分别增加73.95%、27.38%,IR656000-85表现为ADC活性增加94.41%,ODC活性却下降13.57%,就SAMDC而言,处理后期(21-28d),三者分别下降40.06%、19.20%和38.21%,多胺氧化酶(PAO)活性变化趋势恰好相反,从而引起多胺(PA)含量特别是腐胺(Put)含量明显上升,此外,UV-B辐射增强能使IAA和GA11/3含量在整个处理期间(7-28d)供试水稻品种(组合)Sy63分别平均下降58.92%和45.48%,NC分别减少43.31%和56.20%,IR65600-85则分别降低38.69%和47.33%,所有供试水稻品种(组合)的ZRs含量表现为处理前期(7-14d)有所降低,处理后期(21-28d)则明显提高,就ABA含量而言,整个处理时间(7-28d),3个品种(组合)均比对照显著或后期(21-28d)则明显提高,就ABA含量而言,整个处理期间(7-28 d),3个品种(组合)均比对照显著或极显著增加,三者分别提高了14.4%、99.6%和56.7%,从而显著降低IAA/ABA、GA1/3/ABA和ZRs/ABA的比值,影响水稻生长发育。

关 键 词:水稻  UV-B辐射增强  多胺代谢  植物内源激素
文章编号:1001-9332(2002)07-0807-07
修稿时间:2001年11月16

Effect of enhanced UV-B radiation on polyamine metabolism and endogenous hormone contents in rice (Oryza sativa L.)
LIN Wenxiong,WU Xingchun,LINAG Kangjing,GUO Yuchun,HE Huaqin,CHEN Fangyu,LIANG Yiyuan.Effect of enhanced UV-B radiation on polyamine metabolism and endogenous hormone contents in rice (Oryza sativa L.)[J].Chinese Journal of Applied Ecology,2002,13(7):807-813.
Authors:LIN Wenxiong  WU Xingchun  LINAG Kangjing  GUO Yuchun  HE Huaqin  CHEN Fangyu  LIANG Yiyuan
Institution:School of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002. zjwxlin@pub5.fz.fj.cn
Abstract:The results showed that the activities of Agrinine decarboxylase(ADC), Ornithine decarboxylase(ODC) and s-Adenosylmethionine decarboxylase(SAMDC) were increased by 165.74%, 104.60% and 89.60% in the leaves of Shan You63(Sy63) and by 59.91%, 41.30% and 23.68% in the leaves of Nancheum(NC). Only ADC and ODC activities were increase by 115.93%, 14.45%, but SAMDC activity was decreased by 33.01% in the leaves of IR65600-85 respectively in the exposure to enhanced UV-B radiation for 7-14 days. In late treatment time course(21-28 d), the activities of ADC and ODC were increased by 89.72% and 3.71% in the leaves of Sy63 exposed to UV-B radiation for 21-28 days and by 73.95% and 27.38% in the leaves of NC. The activity of ADC was also increased by 94.41%, but ODC activity was decreased by 13.57% in the leaves of IR65600-85 compared with the controls. As far as SAMDC was concerned, the enzymic activities in the leaves of Sy63, NC and IR65600-85 were reduced by 40.06%, 19.20% and 38.21% respectively in the exposure to enhanced UV-B radiation for 21-28 days. The reverse was true in the case of Polyamine Oxidase (PAO), this in turn resulted in increased contents of Polyamine(PA) especially putrescine(Put). In addition, the result also indicated that the contents of IAA and GA1/3 were significantly reduced in all rice cultivars used for this experiments with enhanced UV-B radiation treatments for 7-28 days, in which the contents of IAA and GA1/3 were decreased by 58.92% and 45.48% in the leaves of Sy63, by 43.31% and 56.20% in the leaves of NC, and by 38.60% and 47.33% in the leaves of IR65600-85. The contents of ZRs in the leaves of the three cultivars concerned were lower in earlier treatment time courses (7-14 d), but much higher in late courses(21-28 d) compared with the their counterparts. With regard to the endogenous hormone of ABA, the content was significantly increased by 14.4%, 99.6% and 56.7% respectively in the three rice cultivars concerned exposed to enhanced UV-B radiation for 7-28 days, thereby led to decreased values of IAA/ABA, GA1/3/ABA and ZRs/ABA, consequently suppressed growth and development of rice.
Keywords:Rice  Enhanced UV  B radiation  Polyamine metabolism  Endogenous hormone  
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