Isolation and Characterization of Barley (Hordeum vulgare) Extracellular Vesicles to Assess Their Role in RNA Spray-Based Crop Protection
| Autor: | Timo Schlemmer, Patrick Barth, Lisa Weipert, Christian Preußer, Martin Hardt, Anna Möbus, Tobias Busche, Aline Koch |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Host Microbial Interactions
QH301-705.5 Crop Protection Communication barley food and beverages Hordeum dsRNA 660.6 plant EV Chemistry Fusarium graminearum RNA interference RNA Plant RNAi siRNA Gene Silencing Biology (General) Cytochrome P450 Family 3 RNA Small Interfering extracellular vesicles QD1-999 RNA spray Disease Resistance Plant Diseases |
| Zdroj: | International Journal of Molecular Sciences International Journal of Molecular Sciences, Vol 22, Iss 7212, p 7212 (2021) |
| DOI: | 10.3390/ijms22137212 |
| Popis: | The demonstration that spray-induced gene silencing (SIGS) can confer strong disease resistance, bypassing the laborious and time-consuming transgenic expression of double-stranded (ds)RNA to induce the gene silencing of pathogenic targets, was ground-breaking. However, future field applications will require fundamental mechanistic knowledge of dsRNA uptake, processing, and transfer. There is increasing evidence that extracellular vesicles (EVs) mediate the transfer of transgene-derived small interfering (si)RNAs in host-induced gene silencing (HIGS) applications. In this study, we establish a protocol for barley EV isolation and assess the possibilities for EVs regarding the translocation of sprayed dsRNA from barley (Hordeum vulgare) to its interacting fungal pathogens. We found barley EVs that were 156 nm in size, containing predominantly 21 and 19 nucleotide (nts) siRNAs, starting with a 5′-terminal Adenine. Although a direct comparison of the RNA cargo between HIGS and SIGS EV isolates is improper given their underlying mechanistic differences, we identified sequence-identical siRNAs in both systems. Overall, the number of siRNAs isolated from the EVs of dsRNA-sprayed barley plants with sequence complementarity to the sprayed dsRNA precursor was low. However, whether these few siRNAs are sufficient to induce the SIGS of pathogenic target genes requires further research. Taken together, our results raise the possibility that EVs may not be mandatory for the spray-delivered siRNA uptake and induction of SIGS. |
| Databáze: | OpenAIRE |
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