Biology subjects

Alderdice, R.

Publications and source records attributed to Alderdice, R..

2 recordsLinked to original sources

bioRxiv2026

The genome of the reef-building coral Porites harrisoni from the southern Persian/Arabian Gulf

We present a genome assembly from the coral species Porites harrisoni from the southern Persian/Arabian Gulf, the hottest ocean basin where corals live. The assembly is 626.7 Mb in size, spanning 1,883 contigs with a contig N50 of 807.4 kb, including a single-contig mitochondrial genome. The assembly has a BUSCO completeness of 86.3% (single = 72.5%, duplicated = 13.7%, fragmented = 1.2%, missing = 12.5%) using the eukaryota_odb10 reference set (n = 255). A total of 59.23% of the nuclear genome consists of repeats, comprising 15.89% retroelements, 10.00% DNA transposons, and 31.71% unclassified repeats. Gene annotation of this nuclear genome assembly identified 27,823 protein-coding genes. The mitogenome has an assembly size of 18,639 bp with 13 protein-coding genes as well as 2 tRNAs and 2 rRNAs. The genome of P. harrisoni provides a valuable genomic resource of a coral from an extreme environment, which will enable comparative analyses, enhancing our understanding of the genomic architecture underlying thermal resilience. Such comparisons will contribute to elucidating the evolutionary basis of heat tolerance and adaptive capacity of corals in the context of rapid climate change.

genomics↗

bioRxiv2025

Heat-responsive dynamic shifts in alternative splicing of the coral Acropora cervicornis

Climate change has caused drastic declines in corals. As sessile organisms, response to shifting environmental conditions may include changes in gene expression, epigenetic modifications, or the microbiome, but as of yet, a common mechanism of stress response, alternative splicing (AS), has been underexplored in corals. Using short-term acute thermal stress assays, we investigated patterns of AS in the scleractinian coral Acropora cervicornis during response to and a subsequent overnight recovery phase from low (33), medium (35), and high (37) levels of heat stress. We find that 40% of the genomic gene set is subject to AS. Our findings demonstrate conserved and dynamic shifts in splicing profiles during the heat treatment and subsequent recovery phase. AS increased in response to heat stress and was primarily dominated by intron retention in specific classes of transcripts, including those related to splicing regulation itself. While AS returned to baseline levels post-exposure to low heat, AS persisted even after reprieve from higher levels of heat stress. Partial overlap of AS transcripts with differentially expressed genes suggests that AS may represent a distinct and previously underappreciated regulatory mechanism for thermal stress response in corals.

genomics↗