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- Title
ALS herbicide resistance mutations in Raphanus raphanistrum: evaluation of pleiotropic effects on vegetative growth and ALS activity.
- Authors
Li, Mei; Yu, Qin; Han, Heping; Vila‐Aiub, Martin; Powles, Stephen B
- Abstract
Background Gene mutations that endow herbicide resistance may cause pleiotropic effects on plant ecology and physiology. This paper reports on the effect of a number of known and novel target-site resistance mutations of the ALS gene (Ala-122-Tyr, Pro-197-Ser, Asp-376-Glu or Trp-574-Leu) on vegetative growth traits of the weed Raphanus raphanistrum. Results The results from a series of experiments have indicated that none of these ALS resistance mutations imposes negative pleiotropic effects on relative growth rate ( RGR), photosynthesis and resource-competitive ability in R. raphanistrum plants. The absence of pleiotropic effects on plant growth occurs in spite of increased (Ala-122-Tyr, Pro-197-Ser, Asp-376-Glu) and decreased (Trp-574-Leu) extractable ALS activity. Conclusion The absence of detrimental pleiotropic effects on plant growth associated with the ALS target-site resistance mutations reported here is a contributing factor in resistance alleles being at relatively high frequencies in ALS-herbicide-unselected R. raphanistrum populations.© 2012 Society of Chemical Industry
- Subjects
RAPHANUS raphanistrum; HERBICIDE resistance; GENETIC pleiotropy; PHOTOSYNTHESIS; ALLELES
- Publication
Pest Management Science, 2013, Vol 69, Issue 6, p689
- ISSN
1526-498X
- Publication type
Article
- DOI
10.1002/ps.3419