| Title: | Immature leaves are the dominant volatile-sensing organs of maize |
| Author(s): | Wang L; Jaggi S; Cofer TM; Waterman JM; Walthert M; Glauser G; Erb M; |
| Address: | "Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland. Electronic address: lei.wang@unibe.ch. Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland. Neuchatel Platform of Analytical Chemistry, Faculty of Science, University of Neuchatel, Avenue de Bellevaux 51, 2000 Neuchatel, Switzerland. Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland. Electronic address: matthias.erb@unibe.ch" |
| DOI: | 10.1016/j.cub.2023.07.045 |
| ISSN/ISBN: | 1879-0445 (Electronic) 0960-9822 (Linking) |
| Abstract: | "Plants perceive herbivory-induced volatiles and respond to them by upregulating their defenses. To date, the organs responsible for volatile perception remain poorly described. Here, we show that responsiveness to the herbivory-induced green leaf volatile (Z)-3-hexenyl acetate (HAC) in terms of volatile emission, transcriptional regulation, and jasmonate defense hormone activation is largely constrained to younger maize leaves. Older leaves are much less sensitive to HAC. In a given leaf, responsiveness to HAC is high at immature developmental stages and drops off rapidly during maturation. Responsiveness to the non-volatile elicitor ZmPep3 shows an opposite pattern, demonstrating that this form of hyposmia (i.e., decreased sense of smell) is not due to a general defect in jasmonate defense signaling in mature leaves. Neither stomatal conductance nor leaf cuticle composition explains the unresponsiveness of older leaves to HAC, suggesting perception mechanisms upstream of jasmonate signaling as driving factors. Finally, we show that hyposmia in older leaves is not restricted to HAC and extends to the full blend of herbivory-induced volatiles. In conclusion, our work identifies immature maize leaves as dominant stress volatile-sensing organs. The tight spatiotemporal control of volatile perception may facilitate within plant defense signaling to protect young leaves and may allow plants with complex architectures to explore the dynamic odor landscapes at the outer periphery of their shoots" |
| Keywords: | *Zea mays/genetics *Anosmia Cyclopentanes Herbivory (Z)-3-hexenyl acetate defense herbivory-induced plant volatiles maize plant-plant interactions volatile perception; |
| Notes: | "MedlineWang, Lei Jaggi, Simon Cofer, Tristan M Waterman, Jamie M Walthert, Mario Glauser, Gaetan Erb, Matthias eng Research Support, Non-U.S. Gov't England 2023/08/20 Curr Biol. 2023 Sep 11; 33(17):3679-3689.e3. doi: 10.1016/j.cub.2023.07.045. Epub 2023 Aug 18" |
