High impact information on Hepatophyta

• Nucleotide sequences of chloroplast 5S ribosomal RNA from cell suspension cultures of the liverworts Marchantia polymorpha and Jungermannia subulata [1].
• Taken together, the data (1) support a sister group relationship of liverworts as a whole to all other embryophytes, (2) indicate loss of a group I and serial entries of group II introns in the nad5 gene during early evolution of the nonliverwort lineage, and (3) propose a placement of hornworts as sister group to tracheophytes [2].
• The seed plants and simple leafy liverworts each independently derived a low level of bias in rbcL, perhaps indicating relaxed selectional constraint on molecular changes in the gene [3].
• We present the nad2 gene structures in hornworts and liverworts and in the presumptive earliest-branching vascular land plant clade, the Lycopodiopsida [4].
• These intron distribution patterns are consistent with the hypothesis that liverworts represent the basal-most land plants and that the two introns were gained in the common ancestor of mosses-hornworts-vascular plants after liverworts had diverged [5].

Biological context of Hepatophyta

• The necessity for RNA editing to reconstitute conserved codon entities in nad2 is obvious for all clades except the marchantiid liverworts [4].
• A survey of mitochondrial plant genomes revealed intron-containing tRNA genes are rather rare features, with the exception of tRNASerGCU genes in liverworts and peat-mosses [6].

Anatomical context of Hepatophyta

• The inhibition of lipopolysaccharide-induced NOS by 19 bis(bibenzyls) isolated from liverworts in RAW 264.7 macrophages was evaluated [7].

Associations of Hepatophyta with chemical compounds

• Involvement of the mevalonic acid pathway and the glyceraldehyde-pyruvate pathway in terpenoid biosynthesis of the liverworts Ricciocarpos natans and Conocephalum conicum [8].
• Lunularic acid, a common growth inhibitor of liverworts, and five of its synthetic derivatives have also been tested, and two derivatives were found to be highly active [9].
• A capillary zone electrophoresis (CZE) procedure for the determination of l-ascorbic acid (AA) and total ascorbic acid (TAA, as the sum of AA and dehydroascorbic acid) in vascular plants, lichens, bryophytes, and liverworts is described [10].
• The incorporation of 13C-labeled glucose into borneol, bornyl acetate, the sesquiterpenes cubebanol and ricciocarpin A, phytol, and stigmasterol has been studied in axenic cultures of the liverworts Ricciocarpos natans and Conocephalum conicum [8].
• Lignan derivatives from the liverwort Bazzania trilobata [11].

References