ALS herbicide resistance mutations in Raphanus raphanistrum evaluation of pleiotropic effects on vegetative growth and ALS activity
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.
| Main Authors: | , , , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | ACETOLACTATE SYNTHASE, ADAPTATION, ALS ACTIVITY, MUTATIONS, RESISTANCE ALLELE, RESISTANCE MECHANISM, TARGET-SITE MUTATION, VEGETABLE PROTEIN, ALS, ALLELE, COMPETITION [ECOLOGY], GROWTH RATE, HERB, HERBICIDE, MUTATION, PESTICIDE RESISTANCE, PHOTOSYNTHESIS, PHYSIOLOGY, PLEIOTROPY, DRUG EFFECT, ENZYMOLOGY, GENETICS, GROWTH, DEVELOPMENT AND AGING, HERBICIDE RESISTANCE, METABOLISM, MISSENSE MUTATION, RAPHANUS, PLANT PROTEINS, RAPHANUS RAPHANISTRUM, |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46956 |
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