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General Information
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| Term |
photoreceptor cell R1 |
ID (Ontology) |
FBbt:00004213 (Fly Anatomy) |
| Definition |
Outer photoreceptor cell of the adult eye whose rhabdomere is located at the right angle vertex of the longer of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).[ FlyBase:FBrf0049410 FlyBase:FBrf0064798 FlyBase:FBrf0216925 ] |
| Also Known As |
"lamina receptor cell R1" ; "R1" |
| Comment |
The name photoreceptor cell R1 is occasionally, mistakenly assumed to refer to any Rh1 (ninaE) expressing photoreceptor cell. This is incorrect. This term only refers to a type of adult eye photoreceptor cell. The name is based simply on the position of the rhabdomere within each ommatidium - see figure 4 in Wolff and Ready, 1993. Cell connectivity was determined by analysis of semi-automated EM reconstruction of 749 serial sections of 21 complete lamina cartridges. The number of synaptic connections for R1 (presynaptic/postsynaptic) in a single lamina cartridge with each cell type was the following: L1 (40/-), L2 (46/1), L3 (11/-), L4 (-/2), Lai (36/-), Lawf (1/1), epithelial glia (15/-), surface glia (1/-) and marginal glia (1/-) (Rivera-Alba et al., 2011). |
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Links to External Ontologies
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VFB:FBbt_00004213
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 126 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 41 | | Insertions (FBti) | PHENOTYPE_MANIFEST_IN | 14 | | Constructs (FBtp) | PHENOTYPE_MANIFEST_IN | 38 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | Genes | Insertions | Constructs |
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photoreceptor cell R1 (all annotations which use CV term, excluding "NOT" statements) | 127 | 34 | 52 | 46 | photoreceptor cell R1 | ectopic | 6 | -- | 1 | 3 | photoreceptor cell R1 | increased number | 2 | -- | -- | -- | photoreceptor cell R1 | somatic clone | 24 | -- | 3 | 5 | photoreceptor cell R1 | somatic clone | increased number | 1 | -- | -- | -- | photoreceptor cell R1 | somatic clone | third instar larval stage | 2 | -- | -- | -- | photoreceptor cell R1 | third instar larval stage | 7 | -- | -- | 6 |
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Relationships