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Wednesday, October 9, 2024
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Search the Herbicide-Resistance Reference Database
Searches the reference database - authors, title, abstract, and keywords fields. Not case sensitive.
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REFERENCES
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Deng, W., Q. Yang, Y. Zhang, H. Jiao, Y. Mei, X. Li, and M. Zheng
.
2016
.
Cross-resistance patterns to acetolactate synthase (ALS)-inhibiting herbicides of flixweed (
Descurainia sophia
L.) conferred by different combinations of ALS isozymes with a Pro-197-Thr mutation or a novel Trp-574-Leu mutation.
.
Pesticide Biochemistry and Physiology
In press
:
.
Acetolactate synthase (ALS) is the common target of ALS-inhibiting herbicides, and target-site ALS mutations are the main mechanism of resistance to ALS-inhibiting herbicides. In this study, ALS1 and ALS2 genes with full lengths of 2004 bp and 1998 bp respectively were cloned in individual plants of susceptible (S) or resistant (R) flixweed (
Descurainia sophia
L.) populations. Two ALS mutations of Pro-197-Thr and/or Trp-574-Leu were identified in plants of three R biotypes (HB24, HB30 and HB42). In order to investigate the function of ALS isozymes in ALS-inhibiting herbicide resistance, pHB24 (a Pro-197-Thr mutation in ALS1 and a wild type ALS2), pHB42 (a Trp-574-Leu mutation in ALS1 and a wild type ALS2) and pHB30 (a Trp-574-Leu mutation in ALS1 and a Pro-197-Thr mutation in ALS2) subpopulations individually homozygous for different ALS mutations were generated. Individuals of pHB30 had mutations in each isozyme of ALS and had higher resistance than pHB24 and pHB42 populations containing mutations in only one ALS isozyme. Moreover, the pHB24 had resistance to SU, TP and SCT herbicides, whereas pHB24 and pHB42 had resistance to these classes of herbicides as well as IMI and PTB herbicides. The sensitivity of isolated ALS enzyme to inhibition by herbicides in these populations correlated with whole plant resistance levels. Therefore, reduced ALS sensitivity resulting from the mutations in ALS was responsible for resistance to ALS-inhibiting herbicides in flixweed. Available
http://dx.doi.org/10.1016/j.pestbp.2016.08.006
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PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as:
Heap, I. The International Survey of Herbicide Resistant Weeds. Online. Internet.
Wednesday, October 9, 2024
. Available
www.weedscience.org
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2024
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.
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