期刊
CROP PROTECTION
卷 39, 期 -, 页码 1-10出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cropro.2012.04.009
关键词
Resistant crops; Vegetative parameters; ALS activity; Dose-response; Yield
类别
资金
- Ministry of Education and Science of Serbia [III 46008]
The response of the imazamox resistant and susceptible sunflower hybrids Rimi and S to imazamox and of tribenuron-methyl resistant and susceptible hybrids Rsu and S to tribenuron-methyl was investigated both in a whole-plant bioassay and in field experiments. Plants were treated post-emergence with imazamox/tribenuron-methyl at four true leaves (grown in pots) and at four six true leaves (grown in field). Visual injury estimation and vegetative parameters (plant height, fresh weight, dry weight, leaf area) were recorded. ALS (acetolactate synthase) enzyme activity in different herbicide concentrations was determined in vitro. Pronounced differences were noted between Rimi and S hybrids and between Rsu and S hybrids in the vegetative parameters and ALS activity. Namely. Rimi hybrid was 9-64-fold more resistant than S for vegetative parameters and about 3000-fold for ALS activity, while Rsu hybrid was 14-56-fold more resistant than S for vegetative parameters, and about 2600-fold for ALS activity. (C) 2012 Elsevier Ltd. All rights reserved.
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