Marc Behr1,2, Stanley Lutts2, Jean-Francois Hausman1, Gea Guerriero3. 1. Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, 4362, Esch/Alzette, Luxembourg. 2. Groupe de Recherche en Physiologie Végétale, Université catholique de Louvain, 5, Place Croix du Sud, 1348, Louvain-la-Neuve, Belgium. 3. Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, 4362, Esch/Alzette, Luxembourg. gea.guerriero@list.lu.
Abstract
MAIN CONCLUSION: The application of jasmonic acid results in an increased secondary growth, as well as additional secondary phloem fibres and higher lignin content in the hypocotyl of textile hemp (Cannabis sativa L.). Secondary growth provides most of the wood in lignocellulosic biomass. Textile hemp (Cannabis sativa L.) is cultivated for its phloem fibres, whose secondary cell wall is rich in crystalline cellulose with a limited amount of lignin. Mature hemp stems and older hypocotyls are characterised by large blocks of secondary phloem fibres which originate from the cambium. This study aims at investigating the role of exogenously applied jasmonic acid on the differentiation of secondary phloem fibres. We show indeed that the exogenous application of this plant growth regulator on young hemp plantlets promotes secondary growth, differentiation of secondary phloem fibres, expression of lignin-related genes, and lignification of the hypocotyl. This work paves the way to future investigations focusing on the molecular network underlying phloem fibre development.
MAIN CONCLUSION: The application of jasmonic acid results in an increased secondary growth, as well as additional secondary phloem fibres and higher lignin content in the hypocotyl of textile hemp (Cannabis sativa L.). Secondary growth provides most of the wood in lignocellulosic biomass. Textile hemp (Cannabis sativa L.) is cultivated for its phloem fibres, whose secondary cell wall is rich in crystalline cellulose with a limited amount of lignin. Mature hemp stems and older hypocotyls are characterised by large blocks of secondary phloem fibres which originate from the cambium. This study aims at investigating the role of exogenously applied jasmonic acid on the differentiation of secondary phloem fibres. We show indeed that the exogenous application of this plant growth regulator on young hemp plantlets promotes secondary growth, differentiation of secondary phloem fibres, expression of lignin-related genes, and lignification of the hypocotyl. This work paves the way to future investigations focusing on the molecular network underlying phloem fibre development.
Authors: Laura Ragni; Kaisa Nieminen; David Pacheco-Villalobos; Richard Sibout; Claus Schwechheimer; Christian S Hardtke Journal: Plant Cell Date: 2011-04-15 Impact factor: 11.277
Authors: Klaus Brackmann; Jiyan Qi; Michael Gebert; Virginie Jouannet; Theresa Schlamp; Karin Grünwald; Eva-Sophie Wallner; Daria D Novikova; Victor G Levitsky; Javier Agustí; Pablo Sanchez; Jan U Lohmann; Thomas Greb Journal: Nat Commun Date: 2018-02-28 Impact factor: 14.919
Authors: Marc Behr; Eva Pokorna; Petre I Dobrev; Václav Motyka; Cédric Guignard; Stanley Lutts; Jean-Francois Hausman; Gea Guerriero Journal: Plant Signal Behav Date: 2019-03-22