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Fig. 3 | BMC Biology

Fig. 3

From: Functional analysis of sense organ specification in the Tribolium castaneum larva reveals divergent mechanisms in insects

Fig. 3

Comparison of the expression patterns of sense organ subtype-specific genes. Light micrographs of flat preparations stained with DIG labelled RNA probe of Tc ct, Tc cato, and Tc tap. Open arrowheads: tracheal pits; a, m, and p indicate the anterior-dorsal, medio-dorsal, and posterior-dorsal rows of expression, respectively, corresponding to the larval sensilla rows. a–d Tc ct and Tc cato are expressed in the labrum and antennae. e NS14.1, arrowheads: Tc ct expression lateral to the appendages. Arrow: leg expression; asterisks: VNE expression. f NS14.2, ring-like arrangement of Tc ct+ cells in t1; row m has two clusters, dorsal (small arrowhead) and ventral (large arrowhead). In t2–3, Tc ct+ cells are aligned in row p and two clusters in row m (arrows). Scattered, cells are visible in row a. g NS14.1: Tc cato+ clusters arranged in a, m, and p rows in t1–3. Arrowheads: plSCM clusters. Arrow: leg expression. h NS14.2, Tc cato is expressed in rows a, p, and a medial cluster (asterisks) in t1–3. Arrowheads: plCSM. i NS14.1—arrowheads: expression of Tc ct around abdominal tracheal pits; asterisk: VNE. j NS14.2: Tc ct is expressed in row p; row a is only partially covered. k NS14.1, Tc cato+ clusters are visible in rows a, p. plTSO and pvTSO1–2 have prominent positions posterior and ventral to the tracheal pits, respectively (arrowheads). l NS14.2: plTSO, pvTSO1–2, and alBSM indicated. m NS15.1, Tc tap is expressed in plCSMs, alBSMs, and pdCSGs. Arrows: expression in appendages. n NS15.1, clear arrangement of Tc cato positive cells in a, m, and p rows. plCSM expression is decreased (asterisks); small arrowheads: alBSM; large arrowheads: plTSO and pvTSO1–2; arrow: expression in antenna. For abbreviations, see Fig. 1. Scale bar in d, 25 μm in a–l; scale bar in m, 100 μm in m, n

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