Title: | Potential roles for microbial endophytes in herbicide tolerance in plants |
Author(s): | Tetard-Jones C; Edwards R; |
Address: | "School of Agriculture, Food and Rural Development, Newcastle University, Newcastle, UK" |
ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Print) 1526-498X (Linking) |
Abstract: | "Herbicide tolerance in crops and weeds is considered to be monotrophic, i.e. determined by the relative susceptibility of the physiological process targeted and the plant's ability to metabolise and detoxify the agrochemical. A growing body of evidence now suggests that endophytes, microbes that inhabit plant tissues and provide a range of growth, health and defence enhancements, can contribute to other types of abiotic and biotic stress tolerance. The current evidence for herbicide tolerance being bitrophic, with both free-living and plant-associated endophytes contributing to tolerance in the host plant, has been reviewed. We propose that endophytes can directly contribute to herbicide detoxification through their ability to metabolise xenobiotics. In addition, we explore the paradigm that microbes can 'prime' resistance mechanisms in plants such that they enhance herbicide tolerance by inducing the host's stress responses to withstand the downstream toxicity caused by herbicides. This latter mechanism has the potential to contribute to the growth of non-target-site-based herbicide resistance in weeds. Microbial endophytes already contribute to herbicide detoxification in planta, and there is now significant scope to extend these interactions using synthetic biology approaches to engineer new chemical tolerance traits into crops via microbial engineering" |
Keywords: | "Crops, Agricultural/drug effects/*microbiology/physiology Endophytes/*physiology *Herbicide Resistance Herbicides/pharmacology Pheromones/pharmacology Plant Weeds/drug effects/*microbiology/physiology *Soil Microbiology Stress, Physiological Symbiosis Xen;" |
Notes: | "MedlineTetard-Jones, Catherine Edwards, Robert eng BB/L001489/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom Research Support, Non-U.S. Gov't Review England 2015/09/10 Pest Manag Sci. 2016 Feb; 72(2):203-9. doi: 10.1002/ps.4147. Epub 2015 Oct 9" |