Fig 6. Transcription levels of selected genes related to molting and endocrine-mediated pathways in D. magna exposed to 2 mg/L of BTR ($\times$), 5MeBTR ($●$) and 5ClBTR ($▲$) for 4-, 8- and 21d.

(A) ecr, (B) usp, (C) cyp18a1, (D) hr3, (E) ftz-f1, (F) kr-h1, (G) famt, (H) met, (I) src. Gene transcription values are indicated in log₂FC from qRT-PCR measurements. * indicates a significant difference from the corresponding control (p<0.05).