| Gene Information | |
| NCBI Gene ID | 820327 |
| Symbol | SPY |
| LocusTag | AT3G11540 |
| Synonyms | SPINDLY |
| Description | SPY (SPINDLY); transferase, transferring glycosyl groups |
| Gene Type | protein-coding |
| Pattern | SPY|AT3G11540|SPINDLY|SPY (SPINDLY); transferase, transferring glycosyl groups|SPY (SPINDLY) |
| Corresponding sequence in Trichome EST library | AI485554 AJ312094 AL370495 AL371760 AM842167 AW738152 AW930831 AW933156 BI422511 BP135246 BP902506 DB710551 EB681560 ES891111 EX530797 EY086416 EY086417 GO375478 TCHL56882 TCMT45664 TCSL75195 |
| Reference |
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The new RGA locus encodes a negative regulator of gibberellin response in Arabidopsis thaliana. Silverstone AL, Mak PY, Martinez EC, Sun TP. Genetics. 1997 Jul;146(3):1087-99. ...... rga/gal-3 mutant, the wild-type gene product of RGA is probably a negative regulator of GA responses. Our screen for suppressors of gal-3 identified 17 mutant alleles of RGA as well as 10 new mutant alleles at the previously identified SPY locus. The digenic (double homozygous) rga/gal-3 mutants are able to partially repress several defects of gal-3 including stem growth, leaf abaxial trichome initiation, flowering time, and apical dominance. The phenotype of the trigenic ...... |
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...... shows that rga and spy have additive effects regulating flowering time, abaxial leaf trichome initiation and apical dominance. This trigenic mutant is similar to wild type with respect to each of these developmental events. Because rga/spy/gal-3 is almost insensitive to GA for hypocotyl growth and its bolting stem is taller than the wild-type plant, the combined effects of the rga and spy mutations appear to allow GA-independent stem growth. Our studies indicate that RGA ...... |
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Integration of cytokinin and gibberellin signalling by Arabidopsis transcription factors GIS, ZFP8 and GIS2 in the regulation of epidermal cell fate. Gan Y, Liu C, Yu H, Broun P. Development. 2007 Jun;134(11):2073-81. ...... in late inflorescence organs, ZFP8 and GIS2, which encode C2H2 transcription factors related to GLABROUS INFLORESCENCE STEMS (GIS). Cytokinin-inducible GIS2 plays a prominent role in the cytokinin response, in which it acts downstream of SPINDLY and upstream of GLABROUS1. In addition, GIS2 and ZFP8 mediate, like GIS, the regulation of trichome initiation by gibberellins. By contrast, GIS does not play a significant role in the cytokinin response. Collectively, GIS, ZFP8 and ...... |
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Functional analysis of SPINDLY in gibberellin signaling in Arabidopsis. Silverstone AL, Tseng TS, Swain SM, Dill A, Jeong SY, Olszewski NE, Sun TP. Plant Physiol. 2007 Feb;143(2):987-1000. ...... residues of nuclear and cytosolic proteins. Determination of the molecular defects in 14 new spy alleles reveals that these mutations cluster in three TPRs and the C-terminal catalytic region. Phenotypic characterization of 12 spy alleles indicates that TPRs 6, 8, and 9 and the catalytic domain are crucial for GA-regulated stem elongation, floral induction, and fertility. TPRs 8 and 9 and the catalytic region are also important for modulating trichome morphology ...... |
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GLABROUS INFLORESCENCE STEMS modulates the regulation by gibberellins of epidermal differentiation and shoot maturation in Arabidopsis. Gan Y, Kumimoto R, Liu C, Ratcliffe O, Yu H, Broun P. Plant Cell. 2006 Jun;18(6):1383-95. ...... of rosette leaves on inflorescence stems. Genetic and gene expression analyses suggest that GIS acts in a GA-responsive pathway upstream of the trichome initiation regulator GLABROUS1 (GL1) and downstream of the GA signaling repressor SPINDLY (SPY). GIS mediates the induction of GL1 expression by GA in inflorescence organs and is antagonized in its action by the DELLA repressor GAI. The implication of GIS in the broader regulation of phase change is further suggested by the ...... |