| Title: | Volatile DMNT systemically induces jasmonate-independent direct anti-herbivore defense in leaves of sweet potato (Ipomoea batatas) plants |
| Author(s): | Meents AK; Chen SP; Reichelt M; Lu HH; Bartram S; Yeh KW; Mithofer A; |
| Address: | "Research Group Plant Defense Physiology, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany. Institute of Plant Biology, and Climate Change/Sustainable Development Center, National Taiwan University, Taipei, 106, Taiwan. Sanming Academy of Agricultural Sciences, Shaxian, Fujian, 365000, China. Department of Biochemistry, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany. Department of Natural Product Biosynthesis, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany. Institute of Plant Biology, and Climate Change/Sustainable Development Center, National Taiwan University, Taipei, 106, Taiwan. ykwbppp@ntu.edu.tw. Research Group Plant Defense Physiology, Max Planck Institute for Chemical Ecology, 07745, Jena, Germany. amithoefer@ice.mpg.de" |
| DOI: | 10.1038/s41598-019-53946-0 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Plants perceive and respond to volatile signals in their environment. Herbivore-infested plants release volatile organic compounds (VOCs) which can initiate systemic defense reactions within the plant and contribute to plant-plant communication. Here, for Ipomoea batatas (sweet potato) leaves we show that among various herbivory-induced plant volatiles, (E)-4,8-dimethyl-1,3,7-nonatriene (DMNT) had the highest abundance of all emitted compounds. This homoterpene was found being sufficient for a volatile-mediated systemic induction of defensive Sporamin protease inhibitor activity in neighboring sweet potato plants. The systemic induction is jasmonate independent and does not need any priming-related challenge. Induced emission and responsiveness to DMNT is restricted to a herbivory-resistant cultivar (Tainong 57), while a susceptible cultivar, Tainong 66, neither emitted amounts comparable to Tainong 57, nor showed reaction to DMNT. This is consistent with the finding that Spodoptera larvae feeding on DMNT-exposed cultivars gain significantly less weight on Tainong 57 compared to Tainong 66. Our results indicate a highly specific, single volatile-mediated plant-plant communication in sweet potato" |
| Keywords: | Alkenes/*chemistry Cyclopentanes/*chemistry *Herbivory Ipomoea batatas/*chemistry Oxylipins/*chemistry Plant Growth Regulators Plant Leaves/*chemistry Volatile Organic Compounds/*analysis; |
| Notes: | "MedlineMeents, Anja K Chen, Shi-Peng Reichelt, Michael Lu, Hsueh-Han Bartram, Stefan Yeh, Kai-Wun Mithofer, Axel eng Research Support, Non-U.S. Gov't England 2019/11/24 Sci Rep. 2019 Nov 22; 9(1):17431. doi: 10.1038/s41598-019-53946-0" |
