Score: 1.00 | Title: Spatially and temporally regulated expression of rice MADS box genes with similarity to Arabidopsis class A , B and C genes .
| Author: Kyozuka J Kobayashi T Morita M Shimamoto K | Journal: Plant Cell Physiol .
Citation: V : 41 ( 6 ) P : 710-8 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub10945340 Accession (PMID): 10945340 | Abstract: The floral morphology of grass species is distinct from that of typical dicot plants .
In order to achieve a better understanding of the molecular basis for this diversion , we isolated RAP1A , RAP1B and RAG , putative rice orthologs for the Arabidopsis class A gene APETALA1 ( AP1 ) and class C gene AGAMOUS ( AG ) .
The expression patterns of RAP1A , RAG and OsMADS2 , a rice ortholog of the class B gene , were analyzed by in situ hybridization .
RAP1A mRNA was expressed in the apical region of the floral meristem at an early stage of spikelet development , and then its expression was localized in developing lemma , palea and lodicules .
The OsMADS2 transcript was first observed in the region where stamen primordia are formed .
Soon after , OsMADS2 mRNA appeared in the lodicule primordia as well as the stamen primordia , and this RNA accumulation pattern persisted until late stages of floral development .
The expression of RAG was observed in stamens and pistils of wild-type young spikelets .
These RNA accumulation patterns are mostly similar to those of Arabidopsis class A , B , C genes , supporting the notion that the ABC model may be extended to rice . | Matching Sentences: [ Sen. 2, subscore: 1.00 ]: In order to achieve a better understanding of the molecular basis for this diversion , we isolated RAP1A , RAP1B and RAG , putative rice orthologs for the Arabidopsis class A gene APETALA1 ( AP1 ) and class C gene AGAMOUS ( AG ) .
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Score: 1.00 | Title: The COP1 ortholog PPS regulates the juvenile-adult and vegetative-reproductive phase changes in rice .
| Author: Tanaka N Itoh H Sentoku N Kojima M Sakakibara H Izawa T Itoh J Nagato Y | Journal: Plant Cell Citation: V : 23 P : 2143-54 Type: In-Process | Literature: oryza Field: abstract Doc ID: pub21705640 Accession (PMID): 21705640 | Abstract: Because plant reproductive development occurs only in adult plants , the juvenile-to-adult phase change is an indispensable part of the plant life cycle .
We identified two allelic mutants , peter pan syndrome-1 ( pps-1 ) and pps-2 , that prolong the juvenile phase in rice ( Oryza sativa ) and showed that rice PPS is an ortholog of Arabidopsis thaliana CONSTITUTIVE PHOTOMORPHOGENIC1 .
The pps-1 mutant exhibits delayed expression of miR156 and miR172 and the suppression of GA biosynthetic genes , reducing the GA ( 3 ) content in this mutant .
In spite of its prolonged juvenile phase , the pps-1 mutant flowers early , and this is associated with derepression of RAP1B expression in pps-1 plants independently of the Hd1-Hd3a/RFT1 photoperiodic pathway .
PPS is strongly expressed in the fourth and fifth leaves , suggesting that it regulates the onset of the adult phase downstream of MORI1 and upstream of miR156 and miR172 .
Its ability to regulate the vegetative phase change and the time of flowering suggests that rice PPS acquired novel functions during the evolution of rice/monocots .
| Matching Sentences: [ Sen. 4, subscore: 1.00 ]: In spite of its prolonged juvenile phase , the pps-1 mutant flowers early , and this is associated with derepression of RAP1B expression in pps-1 plants independently of the Hd1-Hd3a/RFT1 photoperiodic pathway .
| Supplemental links/files: reference in endnote online text related articles pubmed citation | |