FB2024_04 , released June 25, 2024
FB2024_04 , released June 25, 2024
CV Term Report
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General Information
Term photoreceptor cell R7 ID (Ontology) FBbt:00004225 (Fly Anatomy)
Definition Inner photoreceptor cell of the ommatidium whose rhabdomere is located distally, directly above that of R8 (Wernet and Desplan, 2004). It has a single axon that extends through a single column of the lamina without making synapses (Fischbach and Dittrich, 1989). This axon crosses the first optic chiasm and extends through a single column of the medulla where it makes pre-synaptic contacts, mainly in medulla layers M1 and M5 (Takemura et al., 2008), before terminating in M6 (Gao et al., 2008; Sancer et al., 2019). It forms reciprocal inhibitory histaminergic synapses with the R8 photoreceptor of the same optic column (Schnaitmann et al., 2018), with a large proportion in the first optic chiasm (Kind et al., 2021).[ FlyBase:FBrf0049410 FlyBase:FBrf0064798 FlyBase:FBrf0205531 FlyBase:FBrf0206213 FlyBase:FBrf0224070 FlyBase:FBrf0237706 FlyBase:FBrf0252485 ]
Also Known As "lamina receptor cell R7" ; "R7"
Comment This term refers to a type of adult eye photoreceptor cell, defined based on the position of its rhabdomere within each ommatidium - see figure 4 in Wolff and Ready (1993). It does not refer to Rh7-expressing photoreceptors.
Links to Extrernal Ontologies
VFB:FBbt_00004225
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     464
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      32
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      39
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     199
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles  Genes Images Insertions Constructs
 photoreceptor cell R7 (all annotations which use CV term, excluding "NOT" statements)     468      1     28      1     71    213
     photoreceptor cell R7 | absent       1       --       --       --       --       --
     photoreceptor cell R7 | adult stage      17       --       --       --       1      9
     photoreceptor cell R7 | adult stage | decreased number       1       --       --       --       --       --
     photoreceptor cell R7 | adult stage | increased number       1       --       --       --       1       --
     photoreceptor cell R7 | adult stage | somatic clone      18       --       --       --       2     10
     photoreceptor cell R7 | cell autonomous | somatic clone       2       --       --       --       --       1
     photoreceptor cell R7 | cell non-autonomous | somatic clone       1       --       --       --       --       --
     photoreceptor cell R7 | cell non-autonomous | somatic clone | third instar larval stage       1       --       --       --       --       --
     photoreceptor cell R7 | decreased number | larval stage       1       --       --       --       --       --
     photoreceptor cell R7 | decreased number | larval stage | somatic clone - tissue specific       1       --       --       --       --       --
     photoreceptor cell R7 | ectopic      35       --       --       --       4     23
     photoreceptor cell R7 | ectopic | maternal effect       1       --       --       --       --       --
     photoreceptor cell R7 | ectopic | somatic clone       2       --       --       --       --       --
     photoreceptor cell R7 | heat sensitive       1       --       --       --       --       --
     photoreceptor cell R7 | increased number      46       --       --       --       --      26
     photoreceptor cell R7 | increased number | third instar larval stage       4       --       --       --       --       4
     photoreceptor cell R7 | larval stage       7       --       --       --       --       6
     photoreceptor cell R7 | larval stage | increased number       1       --       --       --       --       1
     photoreceptor cell R7 | larval stage | somatic clone       6       --       --       --       --       4
     photoreceptor cell R7 | maternal effect       1       --       --       --       --       --
     photoreceptor cell R7 | nutrition conditional       3       --       --       --       --       2
     photoreceptor cell R7 | prepupal stage       3       --       --       --       --       1
     photoreceptor cell R7 | pupal stage       5       --       --       --       --       4
     photoreceptor cell R7 | pupal stage | increased number       2       --       --       --       --       --
     photoreceptor cell R7 | pupal stage | somatic clone       6       --       --       --       --       1
     photoreceptor cell R7 | somatic clone      57       --       --       --       2     13
     photoreceptor cell R7 | somatic clone | increased number       3       --       --       --       --       2
     photoreceptor cell R7 | somatic clone | increased number | third instar larval stage       2       --       --       --       --       --
     photoreceptor cell R7 | somatic clone | third instar larval stage       3       --       --       --       --       --
     photoreceptor cell R7 | third instar larval stage      22       --       --       --       1     17
Spanning Tree (Parents/Children)
Only view relationship:
  eye photoreceptor cell
   |__inner photoreceptor cell
       |__photoreceptor cell R7  881 rec.
           |__dorsal margin photoreceptor cell R7 13 rec.
           |__photoreceptor cell R7 of pale ommatidium 19 rec.
           |__photoreceptor cell R7 of yellow ommatidium 24 rec.
           |__photoreceptor cell R7 pigment granule
           |__photoreceptor cell R7 stalk 2 rec.
           |__rhabdomere R7 91 rec.
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Is a inner photoreceptor cell
Develops from photoreceptor R7 precursor cell
Part of
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Synonyms
  • "lamina receptor cell R7" EXACT
    "R7" EXACT VFB_SYMBOL[ FlyBase:FBrf0247762 ]
    "receptor cell R7" RELATED
Secondary IDs
hide External Crossreferences & Linkouts
FlyBrain_NDB:10112
VFB:FBbt_00004225