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논문 기본 정보

자료유형
학술저널
저자정보
WeiQiang Jia (Chungnam National University) Sug-Won Roh (Rural Development Administration Food Crop Industry Technology Service Division) Sung Hwan Choi (Gyeongnam National University of Science and Technology) Jong Chan Won (Gyeongsang National University) Soo Yong Shim (Gyeongsang National University) Jung-Sung Chung (Gyeongsang National University) Le Thi Hien (Chungnam National University) Aung Bo Bo (Chungnam National University) Kee Woong Park (Chungnam National University) Jeung Joo Lee (Gyeongsang National University)
저널정보
한국잡초학회·한국잔디학회 Weed&Turfgrass Science Weed&Turfgrass Science Vol.10 No.1
발행연도
2021.3
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1 - 12 (12page)

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Continuous use of acetolactate synthase (ALS) inhibitors has led to the selection of herbicide-resistant Sagittaria trifolia in paddy fields. Herbicide-resistant (R) S. trifolia was first reported in 2011 in Korea. The objective of this study was to investigate the level and mechanism of resistance and understand the fitness of R biotypes using R and susceptible (S) S. trifolia biotypes originated from seeds and tubers. Whole plant dose-response showed that the R biotypes originated from tubers were highly resistant to cyclosulfamuron and moderately resistant to penoxsulam and imazaquin, with R/S ratios of 250, 13 and 8, respectively. Compared to the S biotype, the R biotype originated from tuber had an amino acid substitution at the position of a Pro197-Leu residue of als gene, a well-known mutation site that could confer resistance to sulfonylurea, triazolopyrimidine, and imidazolinone herbicides. Additionally, the germination rate and growth of the S biotypes originated from seeds were lower than those of the R biotypes. The growth of the S biotypes originated from tubers was more vigorous than that of the R biotypes. Once the seed of R biotypes move to uninfected paddy fields, the germination rate of R biotypes is probably more than that of existing S biotypes. If ALS inhibitors are applied into paddy fields, R biotypes can survive and even produce tubers that can continually propagate and probably become dominant in the population in uninfected paddy fields. Thus, increasing the application rate of ALS inhibitors to kill R biotypes probably can enhance ALS-inhibitors’ selection-pressure.

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Abstract
Introduction
Materials and methods
Results
Discussion
References

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