BIOLIP, a biotechnology-oriented database of oil content in plants, algae, fungi and cyanobacteria

Papini, Alessio; Mosti, Stefano; Lió, Píetro; Haider, Saima

doi:10.1016/j.jbiotec.2010.09.012

Cited by 2 publications

(1 citation statement)

References 1 publication

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“…For this reason, also species of relevant commercial interest are sometimes of uncertain nomenclature and typification even if the species name is always the starting point for the organization of data contained in databases of DNA, RNA and protein sequences, such as Genbank or more specifical ones, as, for instance of fatty acid content [20].…”

Section: Introductionmentioning

confidence: 99%

Taxonomy and Species Delimitation in Cyanobacteria

Papini¹,

Falsini²,

Th³

2021

Preprint

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Cyanobacteria are prokaryotes whose taxonomy follows the same rules of a code (the International Botanical Nomenclature Code, IBNC) built for eukaryotic photosynthetic organisms. Hence, names of cyanobacteria follow the same rules and are assigned to biological entities (species) that should correspond to eukaryotic species. The main difficulty in the current situation is that the species concept in eukaryotes is based theoretically mainly on the biological species concept, that is centered on genetic exchange through sexual reproduction or lack of them. However, as shown, this difference is important from a theoretical point of view, but also in eukaryotes, the boundaries between different species are very rarely checked experimentally by direct observation of sexual barriers and hybridization events. The main concept for species delimitation is hence that related to morphology and, more recently and always in relation to morphology, DNA sequences. The introduction of distances obtained from matrixes of aligned sequences in the framework of a barcoding project provides a quantitative interpretation of species delimitation in relation to genetic distance that can be used both in eukaryotes and prokaryotes. However, the introduction of quantitative criteria needs the definition of distance thresholds to identify the boundaries between different species and, for doing that, it is necessary to test the distance thresholds in models of traditionally defined and recognized species. An alternative approach may be the comparison of the molecular distance (quantitative approach) to data about the capability of strains/species to exchange genetic information. Unfortunately data about this last question is still scarce. The adoption of molecular criteria to check species boundaries based on morphological characters has proved particularly challenging in cyanobacteria: a known example is provided. In conclusion, the only possible approach appears to be the association of molecular data to the increase of available data about the cell structure and the variation thereof in different physiological situations, particularly at the ultrastructural level. A further necessity is the check of the typus for a large number of cyanobacteria species, often based on old basionyms. In many of these cases the typus is often a drawing and more rarely a herbarium specimen or a microscope slide. In many cases an epitypification or a neotypification appears to be necessary.

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Section: Introductionmentioning

confidence: 99%

Taxonomy and Species Delimitation in Cyanobacteria

Papini¹,

Falsini²,

Th³

2021

Preprint

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The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

Mosti

Friedman

Piccolin

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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Please cite this article in press as: Mosti, S., et al., The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy. Flora (2012) With light, fluorescence, transmission electron, and environmental scanning electron microscopy we studied the development of the Lunaria annua L. (Brassicaceae) seeds in order to reveal basic anatomical information about the unusual tissues of these seeds. In particular the seed tegument tissues possess complex morphological aspects that are relevant to the biology and ecology of this plant. A sclerenchymatic tissue as the innermost layer of the teguments apparently offers robust protection for the embryo, yet is organized to be flexible. This tissue likely controls the passage of water from the tegumental layers towards the embryo. We report here the presence of tannins in the pre-sclerenchymatic layer of the unripe seed. The inner tegument also houses a spongy tissue with wide intercellular spaces. This tissue could impart buoyancy to the seeds, which possibly might be required for water transport. The structural features could indicate that Lunaria may have evolved in a Mediterranean environment, which is characterized by a long dry season, but with a large amount of rainfall concentrated in short periods. Probably, not only the typical enlarged and flattened fruits of Lunaria can easily float and be dispersed away from the mother plant, but also the seeds have this dispersal peculiarity after release from the silicules.

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BIOLIP, a biotechnology-oriented database of oil content in plants, algae, fungi and cyanobacteria

Cited by 2 publications

References 1 publication

Taxonomy and Species Delimitation in Cyanobacteria

Taxonomy and Species Delimitation in Cyanobacteria

The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

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