Disease relevance of Anthocerotophyta

• The diversity of the endophytic Nostoc symbionts of two thalloid bryophytes, the hornwort Anthoceros fusiformis and the liverwort Blasia pusilla, was examined using the tRNA(Leu) (UAA) intron sequence as a marker [1].
• The specific activities and cellular protein concentration of GS in symbiotic cyanobacteria associated with the water fern Azolla caroliniana were determined and compared to free-living cultures of Nostoc sp. strain 7801, a strain originally isolated from symbiotic association with the bryophyte Anthoceros punctatus [2].

High impact information on Anthocerotophyta

• Three nonsense codons and an unusual initiation codon were located within the putative coding region of the atpB gene of chloroplast DNA of the hornwort Anthoceros formosae [3].
• In the hornwort Anthoceros, the "moss and liverwort-type" group I intron nad5i753 is absent, and, besides nad5i230 and nad5i1455, intron nad5i1477 is present as the second ancestral group II intron which has evolved into a trans-splicing arrangement in angiosperms [4].
• However, in parsimony and likelihood analyses in which rbcL third-codon-position transitions were either excluded or downweighted (due to apparent saturation), hornworts were placed as sister to all other land plants, with mosses and liverworts jointly forming the second deepest lineage [5].
• Taken together with the recently obtained nad2 data for mosses, each class of bryophytes presents another pattern of angiosperm-type introns conserved in nad2: intron nad2i1 in mosses; intron nad2i3 in liverworts; and both introns, nad2i3 and nad2i4, in hornworts [6].
• Other representatives of the ancestral cis-arranged introns are identified in the fern Osmunda regalis, the horsetail Equisetum telmateia, and the hornwort Anthoceros crispulus [7].

Chemical compound and disease context of Anthocerotophyta

• Photosynthetic CO2 fixation and ribulose bisphosphate carboxylase/oxygenase activity of Nostoc sp. strain UCD 7801 in symbiotic association with Anthoceros punctatus [8].

Biological context of Anthocerotophyta

• Potentially heavy RNA editing was observed in nad1 of Haplomitrium Dedecek, Takakia Hatt. & Inoue, hornworts, Isoetes L., Ophioglossum, and Asplenium [9].

Associations of Anthocerotophyta with chemical compounds

• Cell suspension cultures of the hornwort Anthoceros agrestis Paton (Anthocerotaceae) were cultivated and characterized in CB-media containing 2 and 4% sucrose [10].
• Cinnamic acid 4-hydroxylase (EC 1.14.13.11), a cytochrome P450-dependent hydroxylase was for the first time characterized from a hornwort, Anthoceros agrestis Paton (Anthocerotaceae) [11].
• Production of rosmarinic acid and a new rosmarinic acid 3'-O-beta-D-glucoside in suspension cultures of the hornwort Anthoceros agrestis Paton [10].
• alpha-D-Glucuronosyl-(1-->3)-L-galactose, an unusual disaccharide from polysaccharides of the hornwort Anthoceros caucasicus [12].
• (1) Xyloglucan: driselase digestion yielded isoprimeverose (the diagnostic repeat unit of xyloglucan) from PCW-rich material of Anthoceros (a hornwort), mosses and both leafy and thalloid liverworts, as well as numerous vascular plants, showing xyloglucan to be a PCW component in all land plants tested [13].

Gene context of Anthocerotophyta

• Molecular circumscription of the hornworts (Anthocerotophyta) based on the chloroplast DNA trnL-trnF region [14].
• Establishment of a functional symbiosis between the cyanobacterium Nostoc punctiforme and the bryophyte Anthoceros punctatus requires genes involved in nitrogen control and initiation of heterocyst differentiation [15].

References