Cuticular Membrane Fine Structure of Nicotiana tabacum L. Leaves

ÜGER, H KR

doi:10.1006/anbo.1996.0002

Cited by 18 publications

(15 citation statements)

References 10 publications

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“…It has been established that plant cuticles are lamellar in nature (Willison & Brown, 1977;Willison, 1980;Wada & Staehelin, 1981;Krüger, et al, 1995). However, the lamellae observed in Physcomitrella leaves most strikingly resemble the cuticle reported in protonema of Adiantum capitlus veneris by Wada and Staehelin (1981; see comparison in Fig.…”

Section: Physcomitrellasupporting

confidence: 53%

Investigating the Leaf Cuticle of the Moss Physcomitrella Patens

Ricci¹

2013

Preprint

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To minimize water loss, the aerial parts of vascular land plants are covered with a hydrophobic layer called a cuticle. The cuticle typically consists of two major components: cutin and waxes. In contrast to vascular plants, research reports indicate that some primitive nonvascular plants, such as mosses, lack a cuticle. This study attempts to reconcile contradictory literature reports about the presence of a waxy cuticle on the leaves of the moss Physcomitrella patens.Histochemical staining was utilized to investigate the presence of a cuticle on Physcomitrella leaves. Experiments employing dyes that stain hydrophobic substances were generally consistent with the presence of a cuticle. Hydrophilic dyes were also used to infer the presence of a cuticle through an absence of staining. Histochemical results were supported by observations made using freeze fracture electron microscopy. Leaves consistently fractured through an extracellular layer having a rippled texture, which resembling cuticles known to occur in vascular plants. Attempts to isolate a cuticle from Physcomitrella leaves by partial digestion with chromic acid or treatment with polysaccharide-degrading enzymes were also successful.

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Section: Physcomitrellasupporting

confidence: 53%

Investigating the Leaf Cuticle of the Moss Physcomitrella Patens

Ricci¹

2013

Preprint

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“…Although DNA modification such as methylation is rarely observed in plant or animal virus genomes [12], modified bases are more common in the genomes of bacteriophages [13]. In fact, certain bacteriophages encode DNA-adenine MTases [14,15].…”

Section: Introductionmentioning

confidence: 99%

Molecular cloning and characterization of the DNA adenine methyltransferase gene in Feldmannia sp. virus

2006

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The genome of Feldmannia sp. virus (FsV), a marine brown alga virus, contains a putative DNA adenine methyltransferase (dam) gene of 1,245 bp that encodes a polypeptide of 45.8 kDa. A BLAST search with the FsV dam gene showed high amino acid identity to two putative methyltransferase genes, ORF B29 of Feldmannia irregularis virus (FirrV, 54%) and ORF129 of Ectocarpus siliculosus virus (EsV, 36%); and a PSI BLAST search revealed similarity to the N(6)-adenine methyltransferases (MTases) of other species. Most conserved motifs of beta-class MTases were observed in the FsV dam gene. However, neither of the highly conserved sequences in motifs I (FxGxG) or IV [(S/N/D)PP(Y/F/W)] perfectly matched those in the FsV dam gene. The highly conserved DPPY consensus sequence in motif IV was NTPW in the FsV dam gene, perfectly matching the sequences in ORF B29 of FirrV and ORF129 of EsV. Therefore, the dam genes in brown algae viruses may belong to a yet undiscovered group. The FsV Dam protein expressed from the cloned FsV dam gene methylated E. coli chromosomal DNA. This is the first report showing that a virus infecting marine filamentous brown algae encodes a functional Dam protein.

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“…Xylitol is used as a bulk sweetener, mainly in noncariogenic confectionery and oral hygiene preparations (toothpaste and mouthwash), and less frequently in dietetic foods (food products for diabetics), pharmaceutical preparations (tablets, throat lozenges, multivitamin tablets, cough syrup), and solutions for parenteral nutrition [36,[56][57][58][59]. In noncariogenic confectionery and oral hygiene preparations, xylitol is used mainly because of:…”

Section: Usesmentioning

confidence: 99%