Score: 8.00 |
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| Title: The RADICLELESS1 gene is required for vascular pattern formation in rice .
| | Author: Scarpella E Rueb S Meijer AH .
| | Journal: Development Citation: V : 130 ( 4 ) P : 645-58 Year: 2003 Type: ARTICLE | | Literature: oryza Field: abstract Doc ID: pub12505996 Accession (PMID): 12505996 | | Abstract: The molecular mechanisms through which the complex patterns of plant vascular it issues are established are largely unknown .
The highly ordered , yet simple , striate array of veins of rice leaves represents an attractive system to study the dynamics underlying pattern formation .
Here we show that mutation in the RADICLELESS1 ( RAL1 ) gene results in distinctive vascular pattern defects .
In ral1 embryonic scutella , secondary veins are absent and in the prematurely aborted and discontinuous primary veins , cells are misaligned to each other .
In ral1 leaves , longitudinal and commissural ( transverse ) veins display altered spacing and the commissural veins additionally show atypical branching and interruptions in their continuity .
The vascular pattern alterations of ral1 occur in the context of normally shaped leaf primordia .
Anatomical inspection and analysis of the expression of the procambium specification marker Oshox1-GUS and of the auxin-inducible reporter DR5-GUS demonstrates that all the vascular patterning aberrations of ral1 originate from defects in the procambium , which represents the earliest identifiable stage of vascular development .
Furthermore , the ral1 mutant is unique in that procambium formation in leaf primordium development is delayed .
Finally , the ral1 vascular patterning distortions are associated with a defective response to auxin and with an enhanced sensitivity to cytokinin . ral1 is the first mutant impaired in both procambium development and vascular patterning to be isolated in a monocot species . | Matching Sentences:
[ Sen. 9, subscore: 2.00 ]: Finally , the ral1 vascular patterning distortions are associated with a defective response to auxin and with an enhanced sensitivity to cytokinin . ral1 is the first mutant impaired in both procambium development and vascular patterning to be isolated in a monocot species .
[ Sen. 3, subscore: 1.00 ]: Here we show that mutation in the RADICLELESS1 ( RAL1 ) gene results in distinctive vascular pattern defects .
[ Sen. 4, subscore: 1.00 ]: In ral1 embryonic scutella , secondary veins are absent and in the prematurely aborted and discontinuous primary veins , cells are misaligned to each other .
[ Sen. 5, subscore: 1.00 ]: In ral1 leaves , longitudinal and commissural ( transverse ) veins display altered spacing and the commissural veins additionally show atypical branching and interruptions in their continuity .
[ Sen. 6, subscore: 1.00 ]: The vascular pattern alterations of ral1 occur in the context of normally shaped leaf primordia .
[ Sen. 7, subscore: 1.00 ]: Anatomical inspection and analysis of the expression of the procambium specification marker Oshox1-GUS and of the auxin-inducible reporter DR5-GUS demonstrates that all the vascular patterning aberrations of ral1 originate from defects in the procambium , which represents the earliest identifiable stage of vascular development .
[ Sen. 8, subscore: 1.00 ]: Furthermore , the ral1 mutant is unique in that procambium formation in leaf primordium development is delayed .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
Score: 2.00 |
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| Title: Molecular mechanism of crown root initiation and the different mechanisms between crown root and radicle in rice .
| | Author: Kitomi Y Kitano H Inukai Y | | Journal: Plant Signal Behav Citation: V : 6 P : 1270-8 Year: 2011 Type: In-Process | | Literature: oryza Field: abstract Doc ID: pub21847023 Accession (PMID): 21847023 | | Abstract: Monocot plants produce numerous adventitious ( crown ) roots .
The plant hormone auxin has positive effects on crown root formation , while cytokinin suppresses it .
We have demonstrated that auxin-induced CROWN ROOTLESS5 ( CRL5 ) regulates crown root initiation in rice through the induction of OsRR1 , a negative regulator of cytokinin signaling .
CRL5 overexpressing calli formed adventitious roots , although CRL5 overexpressing plants did not induce ectopic roots , suggesting that CRL5 , which promotes de novo root initiation , might function only in de-differentiated cells .
A radicle initiated normally in a crl5 mutant , in spite of the defect in crown root initiation , whereas crown roots , but not a radicle , were produced in a radicleless1 ( ral1 ) mutant .
A crl5 ral1 double mutant displayed an additive phenotype , showing that the formation of each root is regulated by different genetic mechanisms in rice .
| Matching Sentences:
[ Sen. 5, subscore: 1.00 ]: A radicle initiated normally in a crl5 mutant , in spite of the defect in crown root initiation , whereas crown roots , but not a radicle , were produced in a radicleless1 ( ral1 ) mutant .
[ Sen. 6, subscore: 1.00 ]: A crl5 ral1 double mutant displayed an additive phenotype , showing that the formation of each root is regulated by different genetic mechanisms in rice .
| | Supplemental links/files: reference in endnote online text related articles pubmed citation | |
