Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer
RNA interference (RNAi) is a naturally occurring process inhibiting gene expression, and recent advances in our understanding of the mechanism have allowed its development as a tool against insect pests. A major challenge for deployment in the field is the development of convenient and efficient met...
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| Format: | Article |
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MDPI AG
2020-07-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/11/7/440 |
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| author | Ramya Shanivarsanthe Leelesh Lynne K. Rieske |
| author_facet | Ramya Shanivarsanthe Leelesh Lynne K. Rieske |
| author_sort | Ramya Shanivarsanthe Leelesh |
| collection | DOAJ |
| description | RNA interference (RNAi) is a naturally occurring process inhibiting gene expression, and recent advances in our understanding of the mechanism have allowed its development as a tool against insect pests. A major challenge for deployment in the field is the development of convenient and efficient methods for production of double stranded RNA (dsRNA). We assessed the potential for deploying bacterially produced dsRNA as a bio-pesticide against an invasive forest pest, the emerald ash borer (EAB). EAB feeds on the cambial tissue of ash trees (<i>Fraxinus</i> spp.), causing rapid death. EAB has killed millions of trees in North America since its discovery in 2002, prompting the need for innovative management strategies. In our study, bacterial expression and synthesis of dsRNA were performed with <i>E. coli</i> strain HT115 using the L4440 expression vector. EAB-specific dsRNAs (<i>shi</i> and <i>hsp</i>) over-expressed in <i>E. coli</i> were toxic to neonate EAB after oral administration, successfully triggering gene silencing and subsequent mortality; however, a non-specific dsRNA control was not included. Our results suggest that ingestion of transformed <i>E. coli</i> expressing dsRNAs can induce an RNAi response in EAB. To our knowledge, this is the first example of an effective RNAi response induced by feeding dsRNA-expressing bacteria in a forest pest. |
| first_indexed | 2024-03-10T18:30:10Z |
| format | Article |
| id | doaj.art-fc4497e7056a469dbe31e2b67e5b8ded |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-10T18:30:10Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-fc4497e7056a469dbe31e2b67e5b8ded2023-11-20T06:41:57ZengMDPI AGInsects2075-44502020-07-0111744010.3390/insects11070440Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash BorerRamya Shanivarsanthe Leelesh0Lynne K. Rieske1Department of Entomology, University of Kentucky, Lexington, KY 40546-0091, USADepartment of Entomology, University of Kentucky, Lexington, KY 40546-0091, USARNA interference (RNAi) is a naturally occurring process inhibiting gene expression, and recent advances in our understanding of the mechanism have allowed its development as a tool against insect pests. A major challenge for deployment in the field is the development of convenient and efficient methods for production of double stranded RNA (dsRNA). We assessed the potential for deploying bacterially produced dsRNA as a bio-pesticide against an invasive forest pest, the emerald ash borer (EAB). EAB feeds on the cambial tissue of ash trees (<i>Fraxinus</i> spp.), causing rapid death. EAB has killed millions of trees in North America since its discovery in 2002, prompting the need for innovative management strategies. In our study, bacterial expression and synthesis of dsRNA were performed with <i>E. coli</i> strain HT115 using the L4440 expression vector. EAB-specific dsRNAs (<i>shi</i> and <i>hsp</i>) over-expressed in <i>E. coli</i> were toxic to neonate EAB after oral administration, successfully triggering gene silencing and subsequent mortality; however, a non-specific dsRNA control was not included. Our results suggest that ingestion of transformed <i>E. coli</i> expressing dsRNAs can induce an RNAi response in EAB. To our knowledge, this is the first example of an effective RNAi response induced by feeding dsRNA-expressing bacteria in a forest pest.https://www.mdpi.com/2075-4450/11/7/440RNA interferenceRNAi<i>Agrilus planipennis</i>EABRNAi-based biopesticideforest pest management |
| spellingShingle | Ramya Shanivarsanthe Leelesh Lynne K. Rieske Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer Insects RNA interference RNAi <i>Agrilus planipennis</i> EAB RNAi-based biopesticide forest pest management |
| title | Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer |
| title_full | Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer |
| title_fullStr | Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer |
| title_full_unstemmed | Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer |
| title_short | Oral Ingestion of Bacterially Expressed dsRNA Can Silence Genes and Cause Mortality in a Highly Invasive, Tree-Killing Pest, the Emerald Ash Borer |
| title_sort | oral ingestion of bacterially expressed dsrna can silence genes and cause mortality in a highly invasive tree killing pest the emerald ash borer |
| topic | RNA interference RNAi <i>Agrilus planipennis</i> EAB RNAi-based biopesticide forest pest management |
| url | https://www.mdpi.com/2075-4450/11/7/440 |
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