No auxinic herbicide–resistance cost in wild radish (Raphanus raphanistrum)
| Autor: | Stephen B. Powles, Chad Sayer, Danica E. Goggin, Hugh J. Beckie |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
biology Resistance (ecology) media_common.quotation_subject fungi Seed dormancy food and beverages Brassicaceae 04 agricultural and veterinary sciences Plant Science Raphanus raphanistrum biology.organism_classification 01 natural sciences Competition (biology) chemistry.chemical_compound chemistry Agronomy Dicamba 040103 agronomy & agriculture Plant defense against herbivory 0401 agriculture forestry and fisheries Weed Agronomy and Crop Science 010606 plant biology & botany media_common |
| Zdroj: | Weed Science. 67:539-545 |
| ISSN: | 1550-2759 |
| Popis: | Wild radish (Raphanus raphanistrum L.) is a problematic and economically damaging dicotyledonous weed infesting crops in many regions of the world. Resistance to the auxinic herbicides 2,4-D and dicamba is widespread in Western Australian R. raphanistrum populations, with the resistance mechanism appearing to involve alterations in the physiological response to synthetic auxins and in plant defense. This study aimed to determine whether these alterations cause inhibition in plant growth or reproduction that could potentially be exploited to manage 2,4-D–resistant populations in cropping areas. Therefore, the morphology and seed production of resistant and susceptible populations were compared in an outdoor pot study, with plants grown in the presence and absence of competition by wheat (Triticum aestivum L.). The susceptible and resistant R. raphanistrum populations were equally suppressed by wheat competition, with plant growth and seed production being decreased by approximately 50%. Although resistant populations produced less vegetative biomass than susceptible populations, there was no negative association between resistance and seed production. Therefore, it is unlikely that any nonherbicidal management practices will be more efficacious on 2,4-D–resistant than 2,4-D–susceptible R. raphanistrum populations. |
| Databáze: | OpenAIRE |
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