Article
Agronomy
Leandro O. Costa, Joanei Cechin, Mauro A. Rizzardi, Sara L. Martin, Connie A. Sauder, Fernando S. Adegas, Magali F. Grando
Summary: The study found that radish and wild radish biotypes resistant to ALS-inhibiting herbicides exhibit ALS gene mutations and changes in enzyme kinetic parameters, resulting in reduced herbicide affinity at the target site and resistance to herbicides.
Article
Agriculture, Multidisciplinary
Huan Lu, Yingze Liu, Mengshuo Li, Heping Han, Fengyan Zhou, Alex Nyporko, Qin Yu, Sheng Qiang, Stephen Powles
Summary: A wild radish population has developed cross-resistance to HPPD-inhibiting herbicides without previous exposure, thanks to enhanced metabolism. The study identified three highly expressed genes in resistant plants, and overexpression of these genes provided resistance against specific herbicides. The findings suggest that overexpression of multiple herbicide-metabolizing genes contributes to herbicide resistance in the wild radish population.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Agronomy
Roberto Busi, Bowen Zhang, Danica Goggin, Glenn Bryant, Hugh J. Beckie
Summary: In no-till Australian wheat crops, multiple-resistant wild radish populations have developed resistance to 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicides, including a coformulated herbicide mixture. Continuous reliance on this mode of action for 12 years has led to field resistance in Raphanus raphanistrum. To mitigate herbicide resistance, constant optimization of herbicide technology, including alternation and mixtures of multiple sites of action, use of preemergence herbicides, and application at the most sensitive plant growth stages, is necessary.
Article
Plant Sciences
Ruolin Wang, Ying Sun, Yuning Lan, Shouhui Wei, Hongjuan Huang, Xiangju Li, Zhaofeng Huang
Summary: This study elucidated the molecular basis of resistance to the ALS inhibitor nicosulfuron in crabgrass populations from different provinces in China. The resistance was found to be mainly due to the overexpression of the ALS gene and possible metabolic resistance.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Eric A. L. Jones, Micheal D. K. Owen
Summary: This study aimed to determine if selected Iowa waterhemp populations are less sensitive to VLCFA-inhibiting herbicides when additional herbicide resistance traits have evolved within the selected population. The results of the experiments provide evidence that some MHR waterhemp populations may exhibit decreased susceptibility to VLCFA-inhibiting herbicides, but generally, these herbicides remain efficacious on Iowa MHR waterhemp populations.
Article
Plant Sciences
Jose G. Vazquez-Garcia, Joel Torra, Candelario Palma-Bautista, Ricardo Alcantara de la Cruz, Rafael De Prado
Summary: Species of Phalaris show varying levels of resistance to ACCase-inhibiting herbicides, with R biotypes exhibiting high cross-resistance levels in three Phalaris species. Resistance mechanisms mainly include target site and non-target-site resistance.
Article
Biochemistry & Molecular Biology
Juan Yang, Haiyan Yu, Hailan Cui, Jingchao Chen, Xiangju Li
Summary: This study investigated the mechanisms of atrazine resistance in a population of Commelina communis, finding that PsbA gene overexpression and enhanced metabolism may be responsible for the resistance.
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
(2022)
Article
Agronomy
Madhab Kumar Sen, Katerina Hamouzova, Jakub Mikulka, Rohit Bharati, Pavlina Kosnarova, Pavel Hamouz, Amit Roy, Josef Soukup
Summary: The study identified mechanisms of resistance to ALS-inhibiting herbicides in a Bromus sterilis biotype, including reduced sensitivity to pyroxsulam, cross-resistance to other herbicides, and possible overexpression of target genes and enhanced metabolism by cytochrome P450s. These findings emphasize the need for monitoring herbicide resistance in brome populations in Europe and the use of alternate herbicides in integrated weed management to delay the evolution of resistance.
PEST MANAGEMENT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Fidel Gonzalez-Torralva, Jason K. Norsworthy
Summary: This research found that weedy rice (Oryza sativa L.) exhibits resistance to quizalofop-ethyl (quizalofop), mainly due to target-site mutations. The study also suggests the presence of herbicide metabolism mediated by glutathione-S-transferases (GSTs) as a non-target site resistance mechanism in some resistant weedy rice samples. These findings have significant implications for weedy rice management and weed control.
Article
Agronomy
Chandrima Shyam, Dallas E. Peterson, Mithila Jugulam
Summary: This study investigated the mechanism of resistance to the herbicide 2,4-D in a Palmer amaranth population collected from a conservation tillage field. The results showed that the resistance was primarily mediated by enhanced metabolism of 2,4-D.
Article
Forestry
Greta C. Gallina, Bert M. Cregg, Eric L. Patterson, Debalina Saha
Summary: Christmas trees are sensitive to weed competition, and weeds can cause growth issues and interfere with production processes. Chemical weed management strategies, with proper timing and application rates, are necessary for effective control. However, repeated use of herbicides with the same mechanism of action can lead to herbicide resistance in weeds, making it important to manage resistance.
Article
Agriculture, Multidisciplinary
Le Chen, Rui Liu, Qing Tan, Hongmei Luo, Yuyu Chen, Yaru Jin, Zhongbing Zheng, Baolong Zhang, Dongshu Guo
Summary: In this study, a mutant MFRR-2 with mesotrione resistance was screened using DNA shuffling technology. The mutant showed stable enzyme activity and exhibited higher resistance to mesotrione, indicating potential application in herbicide resistance genetic engineering.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Plant Sciences
Aldrin Y. Cantila, William J. W. Thomas, Philipp E. Bayer, David Edwards, Jacqueline Batley
Summary: This study identified a large number of disease resistance genes in wild relatives of the Brassicaceae family, which could be utilized for rapid identification of functional genes and genomics-assisted breeding to develop improved disease-resistant Brassicaceae crop cultivars.
Article
Plant Sciences
Jason K. Norsworthy, Vijay K. Varanasi, Muthukumar Bagavathiannan, Chad Brabham
Summary: Amaranthus palmeri, considered the most prolific and troublesome weed in North America, has developed resistance to multiple herbicides. Understanding the process of resistance evolution is crucial for management.
Article
Agriculture, Multidisciplinary
Neanne Alnafta, Roland Beffa, Guido Bojack, Birgit Bollenbach-Wahl, Nicola Z. Brant, Christine Dornbrack, Nicole Dorn, Jorg Freigang, Elmar Gatzweiler, Rahel Getachew, Claudia Hartfiel, Ines Heinemann, Hendrik Helmke, Sabine Hohmann, Harald Jakobi, Gudrun Lange, Peter Lummen, Lothar Willms, Jens Frackenpohl
Summary: There are various challenges in controlling weeds, but the use of small molecular compounds remains the most efficient method. However, plants can develop resistance to active ingredients, including protoporphyrinogen oxidase (PPO) inhibitors which have been used for over 50 years as effective herbicides. Therefore, it is important to continuously discover and develop new PPO inhibitors with improved activity, resistance profile, crop safety, physicochemical properties, and toxicological profile. New lead structures with strong activity have been found through modifying known PPO inhibitors and modeling investigations.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Agronomy
Yanhui Wang, Heping Han, Jinyi Chen, Qin Yu, Martin Vila-Aiub, Hugh J. Beckie, Stephen B. Powles
Summary: The rare resistance mutation Arg-243-Met has a detrimental effect on fitness when plants are homozygous for this mutation, causing high plant mortality, severely diminished growth, and very poor fecundity. In contrast, plants with the Val-202-Phe mutation exhibit a fitness advantage in growth and reproduction. These contrasting effects on fitness help explain the absence of plants homozygous for the Arg-243-Met mutation and the high frequency of plants carrying the Val-202-Phe mutation in dinitroaniline-resistant populations of Lolium rigidum.
PEST MANAGEMENT SCIENCE
(2022)
Article
Agronomy
Jinyi Chen, Qin Yu, Mechelle Owen, Heping Han, Eric Patterson, Chad Sayer, Stephen Powles
Summary: This study screened 21 putative resistant field survey populations from Western Australia with trifluralin, finding that 90% of them contained individuals surviving trifluralin treatment at 480 g/ha. The study identified known alpha-tubulin resistance mutations in TUA4 and newly identified mutations in TUA3/TUA4, confirming a high incidence of resistance to trifluralin in annual ryegrass populations and highlighting the need for diverse management tactics to address both target-site and non-target-site resistance.
PEST MANAGEMENT SCIENCE
(2022)
Article
Multidisciplinary Sciences
Dongya Wu, Enhui Shen, Bowen Jiang, Yu Feng, Wei Tang, Sangting Lao, Lei Jia, Han-Yang Lin, Lingjuan Xie, Xifang Weng, Chenfeng Dong, Qinghong Qian, Feng Lin, Haiming Xu, Huabing Lu, Luan Cutti, Huajun Chen, Shuiguang Deng, Longbiao Guo, Tse-Seng Chuah, Beng-Kah Song, Laura Scarabel, Jie Qiu, Qian-Hao Zhu, Qin Yu, Michael P. Timko, Hirofumi Yamaguchi, Aldo Merotto, Yingxiong Qiu, Kenneth M. Olsen, Longjiang Fan, Chu-Yu Ye
Summary: This study provides genomic insights into the dual roles of Echinochloa species as weeds and crops, revealing the complex evolution and constrained disease-related gene copy numbers in Echinochloa. The research also uncovers deep population differentiation, herbicide resistance mutations, and limited domestication of barnyard millets. These results offer essential resources for studying plant polyploidization, adaptation, precision weed control, and millet improvements.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Lang Pan, Qiushuang Guo, Junzhi Wang, Li Shi, Xiao Yang, Yaoyu Zhou, Qin Yu, Lianyang Bai
Summary: Long-term and excessive herbicide use has led to the evolution of herbicide resistance in weeds. This study confirmed the resistance of a global weed population, Echinochloa crus-galli, to ALS-inhibiting herbicide penoxsulam and ACCase-inhibiting herbicides cyhalofop-butyl and metamifop. The resistance was found to be due to the higher expression of a cytochrome P450 gene, CYP81A68, and enhanced metabolism via O-demethylation. Epigenetic regulation, specifically differential methylation of CpG islands, was also observed between resistant and susceptible populations. This research highlights the importance of alternative herbicide selection and nonchemical control tactics in reducing environmental impacts.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Agronomy
Feng-Yan Zhou, Heping Han, Yun-Jing Han, Alex Nyporko, Qin Yu, Hugh J. J. Beckie, Stephen B. B. Powles
Summary: The expression of AKR genes (LrAKR4C10 and LrAKR1) in glyphosate-resistant populations of Lolium rigidum from Western Australia is induced by glyphosate and 2,4-D, resulting in enhanced glyphosate metabolism and moderate resistance to glyphosate.
PEST MANAGEMENT SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Huan Lu, Yingze Liu, Mengshuo Li, Heping Han, Fengyan Zhou, Alex Nyporko, Qin Yu, Sheng Qiang, Stephen Powles
Summary: A wild radish population has developed cross-resistance to HPPD-inhibiting herbicides without previous exposure, thanks to enhanced metabolism. The study identified three highly expressed genes in resistant plants, and overexpression of these genes provided resistance against specific herbicides. The findings suggest that overexpression of multiple herbicide-metabolizing genes contributes to herbicide resistance in the wild radish population.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Plant Sciences
Junzhi Wang, Lei Lian, Jiale Qi, Yuhang Fang, Alex Nyporko, Qin Yu, Lianyang Bai, Lang Pan
Summary: Frequent herbicide use leads to the development of weed resistance. A P450 gene (BsCYP81Q32) was identified in Beckmannia syzigachne, a problematic weed, which was found to confer resistance to three herbicides in transgenic rice. The overexpression of the rice ortholog gene OsCYP81Q32 also increased resistance. In contrast, knockout of OsCYP81Q32 using CRISPR/Cas9 made rice more sensitive to one herbicide. Overexpression of BsCYP81Q32 resulted in enhanced metabolism of one herbicide, leading to reduced herbicidal effect. A transcription factor (BsTGAL6) was found to regulate BsCYP81Q32 expression. Inhibition of BsTGAL6 expression changed the plant's response to the herbicide. Sequence polymorphisms in the promoter region of BsTGAL6 might explain differences in expression between resistant and susceptible plants.
Article
Multidisciplinary Sciences
Chun Zhang, Nicholas A. Johnson, Nathan Hall, Xingshan Tian, Qin Yu, Eric L. Patterson
Summary: This study investigates the mechanism of glyphosate resistance in goosegrass, finding that resistance is associated with copy number variation (CNV) of the EPSPS gene, with the variation being driven by sub-telomeric-repeat sequences. This discovery further highlights the importance of subtelomeres in generating genetic variation and provides a unique example of herbicide resistance evolution.
NATURE COMMUNICATIONS
(2023)
Article
Plant Sciences
Huan Lu, Yingze Liu, Dexiao Bu, Fan Yang, Zheng Zhang, Sheng Qiang
Summary: Shepherd's-purse has developed high resistance to ALS-inhibiting herbicides, mainly due to a double ALS gene mutation.
