Lateral neuroblast clones in the antennal lobe that are homozygous for trn28.4 result in ectopic innervation of glomeruli that are normally not the targets of lateral projection neurons.
Compared to wild-types, the number of contact points is reduced between myopodia and growth cones in trn28.4/Df(3L)trnΔ17 mutant embryos.
Invaginating trn28.4 salivary glands often show irregular lumens.
trn28.4 homozygous embryos have motor axon guidance defects that primarily affect the ISNb and SNa nerves including truncation of ISNb prior to muscle 13, failure f the ISNb to branch from the intersegmental nerve and failure of SNa to bifurcate.
Homozygous clones in the eye disc appear normal.
Similarly to wild-type clones, trn28.4 single mutant clones display irregular boundaries.
With regards to trn28.4 mutant clones in the leg imaginal disc, the displacement rate of cells from tarsal segment 5 to to the pretarsal segment is reduced from the 95.2% in wild-type clones to 80.0% in the mutants.
trn28.4 mutant embryos show gaps in both the dorsal and lateral trunk.
trn28.4/In(3LR)C190 embryos show a block in normal somatic muscle morphogenesis, without defects in the initial specification of the muscles. Muscles LT1-4 and DT1 often have abnormal shapes and attachments.
Homozygous clones do not cause observable alterations in the wing disc.
Segmentation normal.
trn28.4 is a non-enhancer of abnormal neuroanatomy phenotype of capsDel1
capsDel1, trn28.4 has abnormal neuroanatomy | somatic clone phenotype
trn28.4 has tracheal dorsal trunk primordium phenotype, enhanceable by Scer\GAL4twi.PG/capsUAS.cSa
trn28.4 has tracheal dorsal trunk primordium phenotype, enhanceable by Scer\GAL4twi.PG/capsID.UAS
trn28.4 has tracheal dorsal trunk primordium phenotype, enhanceable by caps::trntrnEd.capsId.UAS/Scer\GAL4twi.PG
trn28.4 has tracheal dorsal trunk primordium phenotype, suppressible | partially by Scer\GAL4twi.PG/capsED.UAS
trn28.4 has tracheal dorsal trunk primordium phenotype, suppressible | partially by Scer\GAL4twi.PG/caps::trncapsEd.trnId.UAS
trn28.4 is a non-enhancer of photoreceptor cell R8 phenotype of capsDel1
capsDel1, trn28.4 has antennal lobe projection neuron of ALl1 lineage | somatic clone phenotype
capsDel1, trn28.4 has embryonic/larval salivary gland phenotype
capsDel1, trn28.4 has eye disc | cell non-autonomous phenotype
capsDel1, trn28.4 has eye disc morphogenetic furrow | cell non-autonomous phenotype
capsDel1, trn28.4 has ommatidium | cell non-autonomous phenotype
Lateral neuroblast clones in the antennal lobe that are doubly homozygous for capsDel1 and trn28.4 show two types of dendrite targeting defects; loss of innervation in glomeruli that are normally targets of lateral projection neurons and gain of innervation in glomeruli that are normally not the targets of lateral projection neurons. Loss of innervation of the VA7m, VC1 and VC2 glomeruli is frequently seen in the double mutant embryos.
trn28.4 capsDel1 double mutant clones in the eye disc show subtle but consistent defects. At the clone border, there is a consistent reduction in the apical constriction of cells. This phenotype is fully penetrant, but appears more pronounced when the clone boundary is perpendicular to the morphogenetic furrow. Within the morphogenetic furrow, cells at the clone boundary are also taller than their neighbours, as their apical surfaces are elevated, disrupting the furrow. The phenotypes of relaxation of apical constriction and increase in apical-basal height of cells are non-autonomous as they are seen in both mutant and wild-type cells at the clone boundary. The range of the phenotype is only 2-3 rows of cells beyond the clone border.
trn28.4 capsDel1 double mutant clones in the third instar eye disc result in a perturbation in ommatidial spacing. This is only apparent at the boundaries between mutant and wild-type cells, where ommatidia close to these boundaries are often clearly displaced from their normal positions with no obvious change to their individual morphology. The total number of ommatidia is not affected. This phenotype is non-autonomous, with both mutant and wild-type ommatidia showing mis-positioning. At pupal stages of development, spacing defects are still seen in eye discs with trn28.4 capsDel1 double mutant clones, and fusion of neighbouring ommatidia that are abnormally close to each other is seen in about 5% of ommatidia adjacent to clone boundaries. Very occasional defects are seen in the number of cone cells.
trn28.4, caps65.2 double mutant embryos show an additive phenotype, where the sum of the gaps in the dorsal and lateral trunks seen in single mutants is close to the figure seen in the double mutants.
Expression of capsED.Scer\UAS under the control of Scer\GAL4twi.PG in trn28.4 embryos rescues the dorsal trunk defects in 47% of cases. In contrast, expression of either capsScer\UAS.cSa or capsID.Scer\UAS, under the control of Scer\GAL4twi.PG, increases the severity of the dorsal trunk formation trn28.4 phenotype.
Expression of caps::trncapsEd.trnId.Scer\UAS under the control of Scer\GAL4twi.PG rescues the tracheal defects of trn28.4 embryos. In contrast, expression of caps::trntrnEd.capsId.Scer\UAS under the control of Scer\GAL4twi.PG enhances the tracheal defects of trn28.4 embryos so that these embryos show 11.2% more dorsal trunk interruptions than trn28.4 mutants.
trn28.4 is rescued by Scer\GAL4twi.PG/trnUAS.cMa
trn28.4 is rescued by Scer\GAL4twi.PG/trnΔC.UAS.Tag:MYC