Characterization of Laguncularia racemosa transcriptome and molecular response to oil pollution.

•A quality Laguncularia racemosa transcriptome was assembled and annotated.•After 12 h, the oil pollution changed the expression profile of L. racemosa leaves and roots.•Genes related to photosynthesis and protein metabolism were modulated by oil exposure in leaves.•Genes related to photosynthesis, hypoxia response and ethylene pathway were modulated by oil contamination in roots.•A suitable pair of reference genes for qPCR data normalization of oil-exposed mangrove is provided.