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当前位置: 首页 > 文章 > DA-6对桃树叶片叶绿素合成途径的调控研究 园艺学报 2012,39 (4) 621-628
Position: Home > Articles > Effects of DA-6 on Chlorophyll Biosythesis Pathway in Peach Leaves Acta Horticulturae Sinica 2012,39 (4) 621-628

DA-6对桃树叶片叶绿素合成途径的调控研究

作  者：
杨清;艾沙江·买买提;王志霞;刘国杰
单  位：
中国农业大学农学与生物技术学院果树系
关键词：
桃;DA-6;叶绿素;合成;前体物质;关键酶;酶活性
摘  要：
以‘香山水蜜桃’为试材,研究叶面喷施DA-6(二烷氨基乙醇羧酸酯N,N-diethylaminoethyl hexanote)对叶绿素(Chlorophyll,Chl.)合成过程中前体物质的含量以及合成关键酶活性的影响,探讨DA-6提高桃叶片Chl.含量的可能原因。结果表明:生长季叶面喷施20mg·L-1DA-6显著提高了Chl.的含量,Chl.b含量的提高尤为显著,降低了Chl.的前体物质5–氨基酮戊酸(5-aminolevulinic acid,ALA)含量,增加了后续中间产物胆色素原(porphobilinogen,PBG)、尿卟啉原Ⅲ(uroporphyrinogeⅢ,UrogenⅢ)含量,表明DA-6处理促进了ALA向PBG的转化和PBG向UrogenⅢ的转化。以上两步骤的关键酶5–氨基酮戊酸脱水酶(5-aminolevulinate dehydratase,ALAD)和尿卟啉原Ⅲ合酶(uroporporphyrinogn Ⅲ synthase,UROS)的活性在处理后显著提高。叶面喷施DA-6是通过提高ALA向PBG和PBG向UrogenⅢ的转化效率,促进Chl.的合成,使Chl.含量增加。
译  名：
Effects of DA-6 on Chlorophyll Biosythesis Pathway in Peach Leaves
作  者：
YANG Qing,MAIMAITI Aishajiang,WANG Zhi-xia,and LIU Guo-jie* (Department of Pomology,College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193, China)
关键词：
peach;DA-6;chlorophyll;biosynthesis;precursors;key enzyme;enzyme activity
摘  要：
Taken‘Xiangshan Honey’peach as the material,the change of chlorophyll precursor contents and activity of the key enzymes in chlorophyll biosynthesis pathway after DA-6 (N-diethylaminoethyl hexanote)application were investigated the underlying mechanism of DA-6 induced leaf chlorophyll content increase. Compared with the control,20 mg · L-1 foliar DA-6 spray significantly increased the contents of chlorophylls,especially that of chlorophyll b,and chlorophyll intermediate products porphobilinogen(PBG)and uroporphyrinoge(Urogen Ⅲ),whereas decreased the amount of chlorophyll precursor 5-aminolevulinic acid(ALA). The results suggested the transformation from ALA to PBG and PBG to Urogen Ⅲ was up-regulated. The key enzymes catalyzing the two reactions are 5-aminolevulinate dehydratase(ALAD)and uroporporphyrinogn Ⅲ synthase(UROS), their enhanced activity after DA-6 foliar spraying was assayed. Our study demonstrated that foliar spray DA-6 increased the conversion efficiency of ALA to PBG and PBG to Urogen Ⅲ,up-regulated the chlorophyll biosynthesis pathway and resulted in higher chlorophyll content in peach leaves.

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