Auxin Controls Arabidopsis Adventitious Root Initiation by Regulating Jasmonic Acid Homeostasis
Laurent Gutierrez,Gaëlle Mongelard,Kristýna Floková,Daniel Ioan Pacurar,Ondřej Novák,Ondřej Novák,Paul E. Staswick,Mariusz Kowalczyk,Monica Lacramioara Pacurar,Monica Lacramioara Pacurar,Hervé Demailly,Gaia Geiss,Catherine Bellini,Catherine Bellini +13 more
TLDR
A model in which adventitious rooting is an adaptive developmental response involving crosstalk between the auxin and jasmonate regulatory pathways is proposed.Abstract:
Vegetative shoot-based propagation of plants, including mass propagation of elite genotypes, is dependent on the development of shoot-borne roots, which are also called adventitious roots. Multiple endogenous and environmental factors control the complex process of adventitious rooting. In the past few years, we have shown that the auxin response factors ARF6 and ARF8, targets of the microRNA miR167, are positive regulators of adventitious rooting, whereas ARF17, a target of miR160, is a negative regulator. We showed that these genes have overlapping expression profiles during adventitious rooting and that they regulate each other's expression at the transcriptional and posttranscriptional levels by modulating the homeostasis of miR160 and miR167. We demonstrate here that this complex network of transcription factors regulates the expression of three auxin-inducible Gretchen Hagen3 (GH3) genes, GH3.3, GH3.5, and GH3.6, encoding acyl-acid-amido synthetases. We show that these three GH3 genes are required for fine-tuning adventitious root initiation in the Arabidopsis thaliana hypocotyl, and we demonstrate that they act by modulating jasmonic acid homeostasis. We propose a model in which adventitious rooting is an adaptive developmental response involving crosstalk between the auxin and jasmonate regulatory pathways.read more
Citations
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Jasmonates: biosynthesis, perception, signal transduction and action in plant stress response, growth and development. An update to the 2007 review in Annals of Botany
Claus Wasternack,Bettina Hause +1 more
TL;DR: Important new components of jasmonate signalling including its receptor were identified, providing deeper insight into the role ofJASMONATE signalling pathways in stress responses and development.
Journal ArticleDOI
MYC2: the master in action.
Kemal Kazan,John M. Manners +1 more
TL;DR: Mechanistic new insights are revealed into the mode of action of this versatile TF that is involved in JA-regulated plant development, lateral and adventitious root formation, flowering time, and shade avoidance syndrome.
Journal ArticleDOI
Adventitious Roots and Lateral Roots: Similarities and Differences
TL;DR: The developmental processes that give rise to lateral and adventitious roots are discussed and knowledge acquired over the past few years about the mechanisms that regulate adventitious root formation is highlighted.
Journal ArticleDOI
Jasmonate action in plant growth and development
TL;DR: Since the 1980s, details of the JA biosynthesis pathway, signaling pathway, and crosstalk during plant growth and development have been elucidated.
Journal ArticleDOI
The Physiology of Adventitious Roots.
Bianka Steffens,Amanda Rasmussen +1 more
TL;DR: This work uses three case studies to summarize the physiology of adventitious root development in response to flooding, nutrient deficiency, and wounding, and proposes clear definitions of these classes.
References
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Bryan Thines,Leron Katsir,Maeli Melotto,Yajie Niu,Ajin Mandaokar,Guanghui Liu,Kinya Nomura,Sheng Yang He,Gregg A. Howe,John Browse +9 more
TL;DR: The results suggest a model in which jasmonate ligands promote the binding of the SCFCOI1 ubiquitin ligase to and subsequent degradation of the JAZ1 repressor protein, and implicate theSCFCOi1–JAZ1 protein complex as a site of perception of the plant hormone JA–Ile.
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Andrea Chini,Sandra Fonseca,Guillermo Fernández,Bruce Adie,José-Manuel Chico,Oscar Lorenzo,Gloria García-Casado,Irene López-Vidriero,Francisca María Lozano,María Rosa Ponce,José Luis Micol,Roberto Solano +11 more
TL;DR: The identification of JASMONATE-INSENSITIVE 3 (JAI3) and a family of related proteins named JAZ (jasmonate ZIM-domain), in Arabidopsis thaliana and the existence of a regulatory feed-back loop involving MYC2 and JAZ proteins, which provides a mechanistic explanation for the pulsed response to jasmonate and the subsequent desensitization of the cell.
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JASMONATE-INSENSITIVE1 Encodes a MYC Transcription Factor Essential to Discriminate between Different Jasmonate-Regulated Defense Responses in Arabidopsis
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Journal ArticleDOI
A Role for Flavin Monooxygenase-Like Enzymes in Auxin Biosynthesis
Yunde Zhao,Sioux K. Christensen,Christian Fankhauser,John R. Cashman,Jerry D. Cohen,Detlef Weigel,Joanne Chory,Joanne Chory +7 more
TL;DR: Results from tryptophan analog feeding experiments and biochemical assays indicate that YUCCA catalyzes hydroxylation of the amino group of tryptamine, a rate-limiting step in tryptophile-dependent auxin biosynthesis.