Impact of jasmonic acid on lignification in the hemp hypocotyl

Phytohormones are crucial molecules regulating plant development and responses to environmental challenges, including abiotic stresses, microbial and insect attacks. Most notably, phytohormones play important roles in the biosynthesis of lignocellulosics. Jasmonates are involved in secondary growth and secondary metabolism, such as phenylpropanoids and lignin biosyntheses. At the physiological and molecular levels, the actions of phytohormones depend on subtle concentration changes, as well as antagonistic equilibria between two or more of these molecules. In this article, we investigate the consequences of jasmonic acid (JA) spraying on young hemp hypocotyls. First, we show that JA application results in changes in the monomeric composition of lignin. Second, we highlight that, five days after application, JA leads to an increase in salicylic acid (SA) content in hemp hypocotyls. These results are discussed in the light of the known antagonism between JA and SA at both the physiological and molecular levels. The authors declare no conflict of interest. The funding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results. Sample our Bioscience journals, sign in here to start your access, Latest two full volumes FREE to you for 14 days How Researchers Changed The World - Episode 1 Title-by-title archive - You can now purchase the complete archive of a single journal! People also read rapid communication Rice group I GH3 gene family, positive regulators of bacterial pathogens Shugang Hui et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 5 Published online: 22 Mar 2019 rapid communication Flowers anticipate revisits of pollinators by learning from previously experienced visitation intervals Moritz Mittelbach et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 6 Published online: 26 Mar 2019 rapid communication Key innovations in transition from homospory to heterospory Xin Wang et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 6 Published online: 20 Mar 2019 rapid communication Developmental, genetic and environmental variations of global DNA methylation in the first leaves emerging from the shoot apical meristem in poplar trees Le Gac A-L et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 6 Published online: 27 Mar 2019 rapid communication On the role of the plant mitochondrial thioredoxin system during abiotic stress Paula Da Fonseca-Pereira et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 6 Published online: 18 Mar 2019 rapid communication The FCS-LIKE ZINC FINGER 6 and 10 are involved in regulating osmotic stress responses in Arabidopsis Muhammed Jamsheer K et al. Plant Signaling & Behavior Volume 14, 2019 - Issue 6 Published online: 15 Mar 201