triketone herbicides
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2021 ◽  
Vol 11 ◽  
Author(s):  
Clémence Thiour-Mauprivez ◽  
Marion Devers-Lamrani ◽  
David Bru ◽  
Jérémie Béguet ◽  
Aymé Spor ◽  
...  

Maize cultivators often use β-triketone herbicides to prevent the growth of weeds in their fields. These herbicides target the 4-HPPD enzyme of dicotyledons. This enzyme, encoded by the hppd gene, is widespread among all living organisms including soil bacteria, which are considered as “non-target organisms” by the legislation. Within the framework of the pesticide registration process, the ecotoxicological impact of herbicides on soil microorganisms is solely based on carbon and nitrogen mineralization tests. In this study, we used more extensive approaches to assess with a lab-to-field experiment the risk of β-triketone on the abundance and the diversity of both total and hppd soil bacterial communities. Soil microcosms were exposed, under lab conditions, to 1× or 10× the recommended dose of sulcotrione or its commercial product, Decano®. Whatever the treatment applied, sulcotrione was fully dissipated from soil after 42 days post-treatment. The abundance and the diversity of both the total and the hppd bacterial communities were not affected by the herbicide treatments all along the experiment. Same measurements were led in real agronomical conditions, on three different fields located in the same area cropped with maize: one not exposed to any plant protection products, another one exposed to a series of plant protection products (PPPs) comprising mesotrione, and a last one exposed to different PPPs including mesotrione and tembotrione, two β-triketones. In this latter, the abundance of the hppd community varied over time. The diversity of the total and the hppd communities evolved over time independently from the treatment received. Only slight but significant transient effects on the abundance of the hppd community in one of the tested soil were observed. Our results showed that tested β-triketones have no visible impact toward both total and hppd soil bacteria communities.


Science ◽  
2019 ◽  
Vol 365 (6451) ◽  
pp. 393-396 ◽  
Author(s):  
Hideo Maeda ◽  
Kazumasa Murata ◽  
Nozomi Sakuma ◽  
Satomi Takei ◽  
Akihiko Yamazaki ◽  
...  

The genetic variation of rice cultivars provides a resource for further varietal improvement through breeding. Some rice varieties are sensitive to benzobicyclon (BBC), a β-triketone herbicide that inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD). Here we identify a rice gene, HIS1 (HPPD INHIBITOR SENSITIVE 1), that confers resistance to BBC and other β-triketone herbicides. We show that HIS1 encodes an Fe(II)/2-oxoglutarate–dependent oxygenase that detoxifies β-triketone herbicides by catalyzing their hydroxylation. Genealogy analysis revealed that BBC-sensitive rice variants inherited a dysfunctional his1 allele from an indica rice variety. Forced expression of HIS1 in Arabidopsis conferred resistance not only to BBC but also to four additional β-triketone herbicides. HIS1 may prove useful for breeding herbicide-resistant crops.


2016 ◽  
Vol 24 (1) ◽  
pp. 644-658 ◽  
Author(s):  
Hanna Barchanska ◽  
Marcin Sajdak ◽  
Kornelia Szczypka ◽  
Angelika Swientek ◽  
Martyna Tworek ◽  
...  

Talanta ◽  
2016 ◽  
Vol 146 ◽  
pp. 510-516 ◽  
Author(s):  
Emilie Rocaboy-Faquet ◽  
Lise Barthelmebs ◽  
Carole Calas-Blanchard ◽  
Thierry Noguer

2015 ◽  
Vol 16 (1) ◽  
pp. 125-133 ◽  
Author(s):  
Hanna Barchanska ◽  
Aleksandra Kluza ◽  
Karolina Krajczewska ◽  
Joanna Maj

2015 ◽  
Vol 23 (5) ◽  
pp. 4138-4148 ◽  
Author(s):  
Sana Romdhane ◽  
Marion Devers-Lamrani ◽  
Fabrice Martin-Laurent ◽  
Christophe Calvayrac ◽  
Emilie Rocaboy-Faquet ◽  
...  

2015 ◽  
Vol 43 (7) ◽  
pp. 1093-1099 ◽  
Author(s):  
Milica Jović ◽  
Dragan Manojlović ◽  
Dalibor Stanković ◽  
Uroš Gašić ◽  
Dejan Jeremić ◽  
...  

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