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Gene amplification confers glyphosate resistance in Amaranthus palmeri
- T. Gaines, Wenli Zhang, Philip Westra
- Biology, MedicineProceedings of the National Academy of Sciences
- 14 December 2009
This work investigated recently discovered glyphosate-resistant Amaranthus palmeri populations from Georgia, in comparison with normally sensitive populations, and revealed that EPSPS genes were present on every chromosome and, therefore, gene amplification was likely not caused by unequal chromosome crossing over.
Absorption and Translocation of Aminocyclopyrachlor and Aminocyclopyrachlor-Methyl Ester in Canada Thistle (Cirsium arvense)
- B. Bukun, R. Lindenmayer, S. Nissen, P. Westra, D. Shaner, G. Brunk
- BiologyWeed Science
- 19 April 2010
Significantly greater aminocyclopyrachlor-methyl ester was absorbed, compared with the free acid, which was reflected in the greater aboveground translocation for the methyl ester and, based on this conversion rate, was translocated as the free acids in Canada thistle.
Critical periods for weed control in cotton in Turkey
- B. Bukun
- 1 October 2004
Summary Field studies were conducted over 4 years in southeastern Turkey in 1999–2002 to establish the critical period for weed control (CPWC). This is the period in the crop growth cycle during…
Interspecific hybridization transfers a previously unknown glyphosate resistance mechanism in Amaranthus species
- T. Gaines, S. Ward, B. Bukun, C. Preston, J. Leach, Philip Westra
- Biology, MedicineEvolutionary applications
- 23 August 2011
A previously unknown glyphosate resistance mechanism, amplification of the 5‐enolpyruvyl shikimate‐3‐phosphate synthase gene, was recently reported in Amaranthus palmeri, representing an avenue for acquisition of a novel adaptive trait.
Aminopyralid and Clopyralid Absorption and Translocation in Canada Thistle (Cirsium arvense)
The results suggest that aminopyralid's chemical structure may provide for greater biological activity at the target site than clopyralids.
Germination Biology of Two Invasive Physalis Species and Implications for Their Management in Arid and Semi-arid Regions
- C. Ozaslan, S. Farooq, H. Onen, Selcuk Ozcan, B. Bukun, H. Gunal
- Biology, MedicineScientific Reports
- 5 December 2017
Germination was slightly affected by photoperiods, which suggests that seeds are slightly photoblastic, and the germination ability of both plant species under wide range of environmental conditions suggests further invasion potential towards non-infested areas in Turkey.
Vapor Movement of Synthetic Auxin Herbicides: Aminocyclopyrachlor, Aminocyclopyrachlor-Methyl Ester, Dicamba, and Aminopyralid
Phytotoxic responses of plants exposed to vapors emanating from various surfaces treated with aminocyclopyrachlor-methyl ester were similar to responses to dicamba under enclosed incubation conditions, but were less in outdoor, open-air environments.
Comparison of the Interactions of Aminopyralid vs. Clopyralid with Soil
Lower potential aminopyralid soil leaching, coupled with low use rates, suggests it may be the herbicide of choice in areas where potential for leaching could be a concern.
The Critical Period for Weed Control in Corn in Turkey1
The CPWC was determined with the use of 2.5, 5, and 10% acceptable yield loss levels by fitting logistic and Gompertz equations to relative yield data to determine the critical period for weed control in corn.
Global-level population genomics reveals differential effects of geography and phylogeny on horizontal gene transfer in soil bacteria
- Alex Greenlon, P. L. Chang, D. Cook
- Environmental ScienceProceedings of the National Academy of Sciences
- 8 July 2019
A global-level hierarchical sampling scheme is used to comprehensively characterize the evolutionary relationships and distributional limitations of the nitrogen-fixing bacterial symbionts of the crop chickpea, finding that diverse Mesorhizobium taxa perform symbiosis with chickPEa and have largely overlapping global distributions.