Metal concentrations in wetland plant tissues influences transfer to terrestrial food webs

Hammill, Edd; Pendleton, Maya; Brahney, Janice; Kettenring, Karin M.; Atwood, Trisha B.

doi:10.1007/s10646-022-02550-6

Cited by 6 publications

(1 citation statement)

References 35 publications

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“…However, debates exist about the biology and practical potential of S. tabernaemontani . For example, this species was reported to selectively retain arsenic and selenium in belowground tissues while conveying other heavy metals, such as lead, copper, and cadmium, to aboveground parts ( Hammill et al 2022 ). This selective strategy may lead to the accumulation of harmful elements among trophic levels.…”

Section: Introductionmentioning

confidence: 99%

Chromosome-Scale Genome Assembly for Soft-Stem Bulrush (Schoenoplectus tabernaemontani) Confirms a Clade-Specific Whole-Genome Duplication in Cyperaceae

Li,

Ning,

Zheng

et al. 2024

Genome Biology and Evolution

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Schoenoplectus tabernaemontani (C. C. Gmelin) Palla is a typical macrophyte in diverse wetland ecosystems. This species holds great potential in decontamination applications and carbon sequestration. Previous studies have shown that this species may have experienced recent polyploidization. This would make S. tabernaemontani a unique model to study the processes and consequences of whole genome duplications in the context of the well-documented holocentric chromosomes and dysploidy events in Cyperaceae. However, the inference was not completely solid because it lacked homology information which is essential to ascertain polyploidy. We present here the first chromosome-level genome assembly for S.tabernaemontani. By combining ONT long-reads and Illumina short-reads, plus chromatin conformation via the Hi-C method, we assembled a genome spanning 507.96 Mb, with 99.43% of Hi-C data accurately mapped to the assembly. The assembly contig N50 value was 3.62 Mb. The overall BUSCO score was 94.40%. About 68.94% of the genome was comprised of repetitive elements. 36994 protein-coding genes were predicted and annotated. Long terminal repeat retrotransposons (LTR-rts) accounted for approximate 26.99% of the genome, surpassing the content observed in most sequenced Cyperid genomes. Our well-supported haploid assembly comprised 21 pseudochromosomes, each harboring putative holocentric centromeres. Our findings corroborated a karyotype of 2n=2X=42. We also confirmed a recent whole genome duplication (WGD) occurring after the divergence between Schoenoplecteae and Bolboschoeneae. Our genome assembly expands the scope of sequenced genomes within the Cyperaceae family, encompassing the fifth genus. It also provides research resources on Cyperid evolution and wetland conservation.

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Section: Introductionmentioning

confidence: 99%