| Title: | Effect of allelochemical tricin and its related benzothiazine derivative on photosynthetic performance of herbicide-resistant barnyardgrass |
| Author(s): | Yang XF; Lei K; Kong CH; Xu XH; |
| Address: | "College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China. Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China; State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China. Electronic address: kongch@cau.edu.cn. State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China" |
| DOI: | 10.1016/j.pestbp.2017.08.010 |
| ISSN/ISBN: | 1095-9939 (Electronic) 0048-3575 (Linking) |
| Abstract: | "Despite increasing knowledge of allelochemicals as leads for new herbicides, relatively little is known about the mode of action of allelochemical-based herbicides on herbicide-resistant weeds. In this study, herbicidal activities of a series of allelochemical tricin-derived compounds were evaluated. Subsequently, a benzothiazine derivative 3-(2-chloro-4-methanesulfonyl)-benzoyl-hydroxy-2-methyl-2H-1,2-benzothiazine-1,1-dioxide with 4-hydroxyphenyl-pyruvate dioxygenase (HPPD) inhibiting activity was identified as a target compound on photosynthetic performance of penoxsulam-resistant versus -susceptible barnyardgrass (Echinochloa crus-galli). Regardless of barnyardgrass biotype, the benzothiazine derivative greatly affected chlorophyll fluorescence parameters (Fv/Fm, ETR(1min) and NPQ(1min)), reduced the chloroplast fluorescence levels and expression of HPPD gene. In particular, the benzothiazine derivative interfered with photosynthetic performance of resistant barnyardgrass more effectively than the allelochemical tricin itself. These results showed that the benzothiazine derivative effectively inhibited the growth of resistant barnyardgrass and its mode of action on photosynthesis system was similar to HPPD-inhibiting sulcotrione, making it an ideal lead compound for further development of allelochemical-based herbicide discovery" |
| Keywords: | Chlorophyll/metabolism Echinochloa/*drug effects/genetics/metabolism Flavonoids/*toxicity *Herbicide Resistance Herbicides/pharmacology Oxidoreductases/genetics Pheromones/*toxicity Photosynthesis/drug effects Plant Weeds/*drug effects/genetics/metabolism; |
| Notes: | "MedlineYang, Xue-Fang Lei, Kang Kong, Chui-Hua Xu, Xiao-Hua eng 2017/12/01 Pestic Biochem Physiol. 2017 Nov; 143:224-230. doi: 10.1016/j.pestbp.2017.08.010. Epub 2017 Aug 9" |
