CHLORSULFURON RESISTANCE IN DAUCUS-CAROTA CELL-LINES AND PLANTS - INVOLVEMENT OF GENE AMPLIFICATION

被引：30

作者：

CARETTO, S ^{[1
]}

GIARDINA, MC ^{[1
]}

NICOLODI, C ^{[1
]}

MARIOTTI, D ^{[1
]}

机构：

[1] CNR,INST PLANT BIOCHEM & ECOPHYSIOL,I-00016 MONTEROTONDO,ITALY

来源：

THEORETICAL AND APPLIED GENETICS | 1994年 / 88卷 / 05期

关键词：

DAUCUS CAROTA L; CHLORSULFURON RESISTANCE; ACETOHYDROXYACID SYNTHASE; GENE AMPLIFICATION;

D O I：

10.1007/BF01240912

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Daucus carota L. cell lines stably resistant to the herbicide chlorsulfuron (CS) have been isolated according to a stepwise selection. Studies carried out during different selection steps show that the specific activity of the target enzyme acetohydroxyacid synthase (AHAS) increases along with CS resistance. Southern hybridization analysis performed with a Brassica napus AHAS probe in a CS highly-resistant cell line reveals the presence of a greatly amplified EcoRI fragment of genomic DNA. This indicates that AHAS overproduction induced by stepwise selection is due to gene amplification. Regenerants from some resistant cell lines maintained the CS-resistant trait at the whole plant level.

引用

页码：520 / 524

页数：5

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