| Title: | Isoprene and beta-caryophyllene confer plant resistance via different plant internal signalling pathways |
| Author(s): | Frank L; Wenig M; Ghirardo A; van der Krol A; Vlot AC; Schnitzler JP; Rosenkranz M; |
| Address: | "Helmholtz Zentrum Munchen, Institute of Biochemical Plant Pathology, Research Unit Environmental Simulation, Neuherberg, Germany. Helmholtz Zentrum Munchen, Institute of Biochemical Plant Pathology, Neuherberg, Germany. Wageningen University, Laboratory of Plant Physiology, Wageningen, The Netherlands" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "Isoprene and other terpenoids are important biogenic volatile organic compounds in terms of atmospheric chemistry. Isoprene can aid plant performance under abiotic stresses, but the fundamental biological reasons for the high emissions are not completely understood. Here, we provide evidence of a previously unrecognized ecological function for isoprene and for the sesquiterpene, ss-caryophyllene. We show that isoprene and ss-caryophyllene act as core components of plant signalling networks, inducing resistance against microbial pathogens in neighbouring plants. We challenged Arabidopsis thaliana with Pseudomonas syringae, after exposure to pure volatile terpenoids or to volatile emissions of transformed poplar or Arabidopsis plants. The data suggest that isoprene induces a defence response in receiver plants that is similar to that elicited by monoterpenes and depended on salicylic acid (SA) signalling. In contrast, the sesquiterpene, ss-caryophyllene, induced resistance via jasmonic acid (JA)-signalling. The experiments in an open environment show that natural biological emissions are enough to induce resistance in neighbouring Arabidopsis. Our results show that both isoprene and ss-caryophyllene function as allelochemical components in complex plant signalling networks. Knowledge of this system may be used to boost plant immunity against microbial pathogens in various crop management schemes" |
| Keywords: | Arabidopsis/drug effects/immunology/microbiology Butadienes/*pharmacology Disease Resistance/*drug effects Hemiterpenes/*pharmacology Plant Diseases/*immunology/microbiology Polycyclic Sesquiterpenes/*pharmacology Pseudomonas syringae Signal Transduction/; |
| Notes: | "MedlineFrank, Lena Wenig, Marion Ghirardo, Andrea van der Krol, Alexander Vlot, A Corina Schnitzler, Jorg-Peter Rosenkranz, Maaria eng Research Support, Non-U.S. Gov't 2021/02/02 Plant Cell Environ. 2021 Apr; 44(4):1151-1164. doi: 10.1111/pce.14010. Epub 2021 Feb 18" |
