Abscisic acid signaling is controlled by a BRANCHED1/HD-ZIP I cascade in Arabidopsis axillary buds.
Eduardo González-Grandío,Alice Pajoro,José Manuel Franco-Zorrilla,Carlos Tarancón,Richard G. H. Immink,Pilar Cubas +5 more
TLDR
Inside the buds, the TEOSINTE BRANCHED1, CYCLOIDEA, PCF (TCP) transcriptional regulator BRAN CHED1 (BRC1) binds to and positively regulates the transcription of three related Homeodomain leucine zipper protein (HD-ZIP)-encoding genes, which enhance 9-CIS-EPOXICAROTENOID DIOXIGENASE 3 (NCED3) expression, leadAbstract:
Shoot-branching patterns determine key aspects of plant life and are important targets for crop breeding. However, we are still largely ignorant of the genetic networks controlling locally the most important decision during branch development: whether the axillary bud, or branch primordium, grows out to give a lateral shoot or remains dormant. Here we show that, inside the buds, the TEOSINTE BRANCHED1, CYCLOIDEA, PCF (TCP) transcription factor BRANCHED1 (BRC1) binds to and positively regulates the transcription of three related Homeodomain leucine zipper protein (HD-ZIP)-encoding genes: HOMEOBOX PROTEIN 21 (HB21), HOMEOBOX PROTEIN 40 (HB40), and HOMEOBOX PROTEIN 53 (HB53). These three genes, together with BRC1, enhance 9-CIS-EPOXICAROTENOID DIOXIGENASE 3 (NCED3) expression, lead to abscisic acid accumulation, and trigger hormone response, thus causing suppression of bud development. This TCP/HD-ZIP genetic module seems to be conserved in dicot and monocotyledonous species to prevent branching under light-limiting conditions.read more
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An Update on the Signals Controlling Shoot Branching.
François Barbier,Elizabeth A. Dun,Stephanie C. Kerr,Tinashe G. Chabikwa,Christine A. Beveridge +4 more
TL;DR: This work has highlighted that auxin export from a bud is important for its subsequent growth, and perception of the recently discovered hormone strigolactone is now quite well understood, while the downstream targets remain largely unknown.
Journal ArticleDOI
Transcriptional regulation of strigolactone signalling in Arabidopsis
Lei Wang,Bing Wang,Hong Yu,Hongyan Guo,Tao Lin,Liquan Kou,Anqi Wang,Ning Shao,Haiyan Ma,Guosheng Xiong,Xiao-Qiang Li,Jun Yang,Jinfang Chu,Jiayang Li +13 more
TL;DR: Many of the molecular targets of strigolactones—plant hormones involved in development and in interactions with symbiotic and parasitic organisms—are uncovered, revealing how striglactones function and an intriguing role for self-regulation of a downstream transcription factor.
Journal ArticleDOI
A genetic network mediating the control of bud break in hybrid aspen.
Rajesh Singh,Jay P. Maurya,Abdul Azeez,Abdul Azeez,Pál Miskolczi,Szymon Tylewicz,Szymon Tylewicz,Katja Stojkovič,Nicolas Delhomme,Victor Busov,Rishikesh P. Bhalerao +10 more
TL;DR: The results reveal the mechanistic basis for temperature-cued seasonal control of a key phenological event in perennial plants and identify a genetic network mediating the control of bud break in hybrid aspen.
Journal ArticleDOI
Unleashing floret fertility in wheat through the mutation of a homeobox gene
Shun Sakuma,Guy Golan,Zifeng Guo,Taiichi Ogawa,Akemi Tagiri,Kazuhiko Sugimoto,Nadine Bernhardt,Jonathan Brassac,Martin Mascher,Goetz Hensel,Shizen Ohnishi,Hironobu Jinno,Yoko Yamashita,Idan Ayalon,Zvi Peleg,Thorsten Schnurbusch,Takao Komatsuda +16 more
TL;DR: This study demonstrates a direct association between increased floret fertility, higher grain number per spike, and higher plot yields of field-grown wheat and reveals that the reduced-function allele GNI-A1 contributes to the increased number of fertile florets per spikelet.
Journal ArticleDOI
Apocarotenoids Involved in Plant Development and Stress Response.
TL;DR: The biosynthesis and biological functions of established regulatory apocarotenoids are described and the recently identified anchorene and zaxinone are touched on, with emphasis on their role in plant growth, development, and stress response.
References
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GENEVESTIGATOR. Arabidopsis Microarray Database and Analysis Toolbox
TL;DR: Genevestigator as mentioned in this paper is a web-browser interface for gene expression analysis using Affymetrix GeneChip data, which allows users to retrieve the expression patterns of individual genes throughout chosen environmental conditions, growth stages, or organs.
Journal ArticleDOI
Arabidopsis basic leucine zipper transcription factors involved in an abscisic acid-dependent signal transduction pathway under drought and high-salinity conditions.
Yuichi Uno,Takashi Furihata,Hiroshi Abe,Riichiro Yoshida,Kazuo Shinozaki,Kazuko Yamaguchi-Shinozaki +5 more
TL;DR: It is suggested that both AREB1 and AREB2 function as transcriptional activators in the ABA-inducible expression of rd29B, and further that A BA-dependent posttranscriptional activation of AREB 1 and AREb2, probably by phosphorylation, is necessary for their maximum activation by ABA.
Journal ArticleDOI
Regulation of drought tolerance by gene manipulation of 9‐cis‐epoxycarotenoid dioxygenase, a key enzyme in abscisic acid biosynthesis in Arabidopsis
Satoshi Iuchi,Masatomo Kobayashi,Teruaki Taji,Masaaki Naramoto,Motoaki Seki,Tomohiko Kato,Satoshi Tabata,Yoshitaka Kakubari,Kazuko Yamaguchi-Shinozaki,Kazuo Shinozaki +9 more
TL;DR: It is demonstrated that the expression of an NCED gene of Arabidopsis, AtNCED3, is induced by drought stress and controls the level of endogenous ABA under drought-stressed conditions.
Journal ArticleDOI
Cistrome and Epicistrome Features Shape the Regulatory DNA Landscape
Ronan C. O'Malley,Shao-shan Carol Huang,Liang Song,Mathew G. Lewsey,Anna Bartlett,Joseph R. Nery,Mary Galli,Mary Galli,Andrea Gallavotti,Joseph R. Ecker +9 more
TL;DR: DNA affinity purification sequencing (DAP-seq) is described, a high-throughput TF binding site discovery method that interrogates genomic DNA with in-vitro-expressed TFs and determined that >75% of Arabidopsis TFs surveyed were methylation sensitive, a property that strongly impacts the epicistrome landscape.
Journal ArticleDOI
AREB1, AREB2, and ABF3 are master transcription factors that cooperatively regulate ABRE‐dependent ABA signaling involved in drought stress tolerance and require ABA for full activation
Takuya Yoshida,Yasunari Fujita,Hiroko Sayama,Satoshi Kidokoro,Kyonoshin Maruyama,Junya Mizoi,Kazuo Shinozaki,Kazuko Yamaguchi-Shinozaki +7 more
TL;DR: All three AREB/ABF transcription factors require ABA for full activation, can form hetero- or homodimers to function in nuclei, and can interact with SRK2D/SnRK2.