Ming Zeng, Franziska Krajinski, Nicole M. van Dam & Bettina Hause (2023) Jarin-1, an inhibitor of JA-Ile biosynthesis in Arabidopsis thaliana, acts differently in other plant species, Plant Signaling & Behavior, 18:1, DOI: 10.1080/15592324.2023.2273515
Ming Zeng, Franziska Krajinski, Nicole M. van Dam & Bettina Hause (2023) Jarin-1, an inhibitor of JA-Ile biosynthesis in Arabidopsis thaliana, acts differently in other plant species, Plant Signaling & Behavior, 18:1, DOI: 10.1080/15592324.2023.2273515
Ming Zeng, Franziska Krajinski, Nicole M. van Dam & Bettina Hause (2023) Jarin-1, an inhibitor of JA-Ile biosynthesis in Arabidopsis thaliana, acts differently in other plant species, Plant Signaling & Behavior, 18:1, DOI: 10.1080/15592324.2023.2273515
Ming Zeng, Franziska Krajinski, Nicole M. van Dam & Bettina Hause (2023) Jarin-1, an inhibitor of JA-Ile biosynthesis in Arabidopsis thaliana, acts differently in other plant species, Plant Signaling & Behavior, 18:1, DOI: 10.1080/15592324.2023.2273515
Abstract
Jasmonates (JAs), including jasmonic acid (JA) and its biologically active derivative JA-Ile, are lipid-derived plant signalling molecules. They govern plant responses to stresses, such as wounding and insect herbivory. Wounding elicits a rapid increase of JA and JA-Ile levels as well as the expression of JAR1, coding for the enzyme involved in JA-Ile biosynthesis. Endogenous increase and application of JAs, such as MeJA, a JA methylester, result in increased defence levels, often accompanied by diminished growth. The function of jarin-1 in Arabidopsis thaliana was assessed. To investigate whether jarin-1 does function similarly in other plants, we tested this in Medicago truncatula, Solanum lycopersicum, and Brassica nigra seedlings in a root growth inhibition assay. Application of jarin-1 alleviated the inhibition of root growth after MeJA application in M. truncatula seedlings, proving that jarin-1 is biologically active in M. truncatula. Jarin-1 did not show, however, a similar effect in S. lycopersicum and B. nigra seedlings treated with MeJA. Even JA-Ile levels were not affected by application of jarin-1 in wounded leaf disks from S. lycopersicum. Based on these results, we conclude that the effect of jarin-1 is highly species-specific. Researchers intending to use jarin-1 for studying the function of JAR1 or JA-Ile in their model plants, must test its functionality before use.
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