Control of Jasmonate Biosynthesis and Senescence by miR319 Targets

By C. Schommer, Javier F. Palatnik, P. Aggarwal, Aurore Chételat, P. Cubas, Edward E. Farmer, Utpal Nath, Detlef Weigel. PLoS Biology, 2008

832 citations recorded by the source corpus.

Considerable progress has been made in identifying the targets of plant microRNAs, many of which regulate the stability or translation of mRNAs that encode transcription factors involved in development. In most cases, it is unknown, however, which immediate transcriptional targets mediate downstream effects of the microRNA-regulated transcription factors. We identified a new process controlled by the miR319-regulated clade of TCP (TEOSINTE BRANCHED/CYCLOIDEA/PCF) transcription factor genes. In contrast to other miRNA targets, several of which modulate hormone responses, TCPs control biosynthesis of the hormone jasmonic acid. Furthermore, we demonstrate a previously unrecognized effect of TCPs on leaf senescence, a process in which jasmonic acid has been proposed to be a critical regulator. We propose that miR319-controlled TCP transcription factors coordinate two sequential processes in leaf development: leaf growth, which they negatively regulate, and leaf senescence, which they positively regulate.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/13f701f56822b10d4cd495afeb2d9e500ed4c7dc

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In Plant Science

1. C. Wasternack
2. Fang Wang
3. Xuemei Chen
4. M. Kolomiets
5. Liqun Jiang
6. Yanru Hu
7. A. Fischer
8. Yuanxin Yan

Citations in the corpus

• Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, neutral): “Class II TCPs (AtTCP2, AtTCP4, and AtTCP10) can induce the expression of LOX2 and promote JA biosynthesis, thereby inhibiting cell proliferation and promoting leaf senescence (Schommer et al., 2008).”
• Jasmonate Biosynthesis, Perception and Function in Plant Development and Stress Responses (2013, background): “Casting doubt about the role of JA in senescence, JA-defective mutants aos and opr3 senesced similar ro wild type under natural senescence conditions or upon dark treatment (He et al., 2002; Schommer et al., 2008).”
• The Arabidopsis CORONATINE INSENSITIVE1 Protein Is a Jasmonate Receptor[C][W] (2009, background): “JAs are also involved in the regulation of many developmental processes, such as root growth, tuberization, tendril coiling, senescence, and fertility (Ueda and Kato, 1980; Staswick et al., 1992; McConn and Browse, 1996; Schommer et al., 2008; Cheng et al., 2009).”
• The Complex Regulation of Senescence (2012, background): “Finally, data obtained by Schommer et al. (2008) indicate an influence of microRNA miR319 on TCP (TEOSINTE BRANCHED/CYCLOIDEA/PCF) transcription factors, which (among other functions) control JA biosynthesis.”
• Plant microRNAs: new players in functional genomics (2013, neutral): “2010), miR319 (Schommer et al. 2008), miR164a (Nikovics et al.”
• Small RNAs and Their Roles in Plant Development (2009, background): “NAC1, regulated by miR164, mediates auxin signaling in lateral root emergence (Guo et al. 2005). miR393 targets TIR1, encoding an auxin receptor and related F-box genes (Jones-Rhoades & Bartel 2004). miR319 represses the biosynthesis of the plant hormone jasmonic acid (Schommer et al. 2008).”
• Jasmonates: biosynthesis, perception, signal transduction and action in plant stress response, growth and development. An update to the 2007 review in Annals of Botany. (2013, background): “Of an additional 16 lipase mutants screened, only PLA1y1 (At1g06800) had a reduced level of JA in wounded leaves.”
• Jasmonate Regulates the INDUCER OF CBF EXPRESSION–C-REPEAT BINDING FACTOR/DRE BINDING FACTOR1 Cascade and Freezing Tolerance in Arabidopsis[W] (2013, background): “…Web-only data. www.plantcell.org/cgi/doi/10.1105/tpc.113.112631 (Franceschi and Grimes, 1991; Shan et al., 2009), senescence (Ueda and Kato, 1980; Schommer et al., 2008; Shan et al., 2011), and defense responses (Howe et al., 1996; McConn et al., 1997; Reymond and Farmer, 1998; Vijayan et al.,…”