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ALS herbicide resistance mutations in Raphanus raphanistrum: evaluation of pleiotropic effects on vegetative growth and ALS activity
Author(s) -
Li Mei,
Yu Qin,
Han Heping,
VilaAiub Martin,
Powles Stephen B
Publication year - 2013
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.3419
Subject(s) - biology , allele , weed , gene , genetics , herbicide resistance , raphanus , botany
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