Back to Search
Start Over
Molecular basis for resistance to tribenuron in shepherd’s purse (Capsella bursa-pastoris (L.) Medik.)
- Source :
-
Pesticide Biochemistry & Physiology . Jun2011, Vol. 100 Issue 2, p160-164. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: Capsella bursa-pastoris, a winter annual weed in the mustard family, can not be controlled by tribenuron after the herbicide has been continuously used for several years. The resistant biotype Lz-R was the generation of a population collected from Liangzhu, a place where tribenuron had been used for more than 15 consecutive years. To confirm and characterize the resistance of C. bursa-pastoris to tribenuron, whole-plant bioassays were conducted in the greenhouse. The results of whole-plant bioassays revealed that Lz-R was highly resistant to tribenuron with the resistance index (GR50 Lz-R)/(GR50 Lz-S) up to 236.6. To investigate the molecular basis of resistance in C. bursa-pastoris, the acetolactate synthase (ALS) genes were sequenced and compared between susceptible and resistant biotypes. Analysis of the nucleotide and deduced amino acid sequences between the biotypes indicated that one substitution had occurred in Domain A, cytosine by thymine (CCT to TCT) at position 197, that led to a change of the amino acid proline in the susceptible to serine in the Lz-R. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00483575
- Volume :
- 100
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Pesticide Biochemistry & Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 60653498
- Full Text :
- https://doi.org/10.1016/j.pestbp.2011.03.005