MULTIPLE RESISTANCE TO SULFONYLUREAS AND IMIDAZOLINONES CONFERRED BY AN ACETOHYDROXY ACID SYNTHASE GENE WITH SEPARATE MUTATIONS FOR SELECTIVE RESISTANCE

被引:59
作者
HATTORI, J [1 ]
RUTLEDGE, R [1 ]
LABBE, H [1 ]
BROWN, D [1 ]
SUNOHARA, G [1 ]
MIKI, B [1 ]
机构
[1] AGR CANADA, PLANT RES CTR, OTTAWA K2H 8P9, ONTARIO, CANADA
来源
MOLECULAR AND GENERAL GENETICS | 1992年 / 232卷 / 02期
关键词
ACETOHYDROXYACID SYNTHASE; ARABIDOPSIS; IMIDAZOLINONE; SULFONYLUREA; TRANSGENIC TOBACCO;
D O I
10.1007/BF00279993
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The acetohydroxyacid synthase (AHAS) gene from the Arabidopsis thaliana mutant line GH90 carrying the imidazolinone resistance allele imr1 was cloned. Expression of the AHAS gene under the control of the CaMV 35S promoter in transgenic tobacco resulted in selective imidazolinone resistance, confirming that the single base-pair change found near the 3' end of the coding region of this gene is responsible for imidazolinone resistance. A chimeric AHAS gene containing both the imr1 mutation and the csr1 mutation, responsible for selective resistance to sulfonylurea herbicides, was constructed. It conferred on transgenic tobacco plants resistance to both sulfonylurea and imidazolinone herbicides. The data illustrate that a multiple-resistance phenotype can be achieved in an AHAS gene through combinations of separate mutations, each of which individually confers resistance to only one class of herbicides.
引用
收藏
页码:167 / 173
页数:7
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