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Arabidopsis NAC1 transduces auxin signal downstream of TIR1 to promote lateral root development.
NAC1, a new member of the NAC family, is induced by auxin and mediates auxin signaling to promote lateral root development and can restore lateral root formation in the auxin-response mutant tir1, indicating that NAC1 acts downstream of TIR1.
The negative regulator of plant cold responses, HOS1, is a RING E3 ligase that mediates the ubiquitination and degradation of ICE1.
- C. Dong, M. Agarwal, Yiyue Zhang, Q. Xie, Jian-Kang Zhu
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 23 May 2006
The results indicate that cold stress responses in Arabidopsis are attenuated by a ubiquitination/proteasome pathway in which HOS1 mediates the degradation of the ICE1 protein.
MicroRNA Directs mRNA Cleavage of the Transcription Factor NAC1 to Downregulate Auxin Signals for Arabidopsis Lateral Root Development
It is shown that miR164 guides the cleavage of endogenous and transgenic NAC1 mRNA, producing 3′-specific fragments, which indicates that auxin induction ofmiR164 provides a homeostatic mechanism to clear Nac1 mRNA to downregulate auxin signals.
SINAT5 promotes ubiquitin-related degradation of NAC1 to attenuate auxin signals
It is shown that SINAT5, an Arabidopsis homologue of the RING-finger Drosophila protein SINA, has ubiquitin protein ligase activity and can ubiquitinate NAC1, which indicates that SinAT5 targets Nac1 for ubiquitIn-mediated proteolysis to downregulate auxin signals in plant cells.
The Arabidopsis Auxin-Inducible Gene ARGOS Controls Lateral Organ Size Article, publication date, and citation information can be found at www.plantcell.org/cgi/doi/10.1105/tpc.013557.
It is shown that ARGOS, a novel Arabidopsis gene that is highly induced by auxin, is involved in organ size control and may transduce auxin signals downstream of AXR1 to regulate cell proliferation and organ growth through ANT during organogenesis.
The rice HIGH-TILLERING DWARF1 encoding an ortholog of Arabidopsis MAX3 is required for negative regulation of the outgrowth of axillary buds.
- J. Zou, Shuying Zhang, Lihuang Zhu
- Biology, MedicineThe Plant journal : for cell and molecular…
- 1 December 2006
Characterization of MAX genes in Arabidopsis, and identification of their orthologs in pea, petunia and rice indicates the existence of a conserved mechanism for shoot-branching regulation in both monocots and dicots.
COP1 and ELF3 control circadian function and photoperiodic flowering by regulating GI stability.
BIK1 interacts with PEPRs to mediate ethylene-induced immunity
- Zixu Liu, Ying Wu, Jian-Min Zhou
- BiologyProceedings of the National Academy of Sciences
- 19 February 2013
It is shown that PEPR1 specifically interacts with receptor-like cytoplasmic kinases botrytis-induced kinase 1 (BIK1) and PBS1-like 1 (PBL1) to mediate Pep1-induced defenses, illustrating a mechanism by which ET and PEPR signaling pathways act in concert to amplify immune responses.
Spotted leaf11, a Negative Regulator of Plant Cell Death and Defense, Encodes a U-Box/Armadillo Repeat Protein Endowed with E3 Ubiquitin Ligase Activityw⃞
In vitro ubiquitination assay indicated that the SPL11 protein possesses E3 ubiquitin ligase activity that is dependent on an intact U-box domain, suggesting a role of the ubiquitinations system in the control of plant cell death and defense.
SDIR1 Is a RING Finger E3 Ligase That Positively Regulates Stress-Responsive Abscisic Acid Signaling in Arabidopsis[W]
Overexpression of SDIR1 leads to ABA hypersensitivity and ABA-associated phenotypes, such as salt hypersensitivity in germination, enhanced A BA-induced stomatal closing, and enhanced drought tolerance.