Spore morphology and wall ultrastructure of Lycopodiaceae from northwest Argentina

Giacosa, Juan Pablo Ramos; Morbelli, Marta A.; Giudice, Gabriela Elena; Gorrer, Daniel Alejandro

doi:10.1016/j.revpalbo.2015.11.009

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…2014; Ramos Giacosa et al . 2016) and three fern families: Ophioglossaceae ( Botrychium Swartz, Ophioglossum Linnaeus), Gleicheniaceae ( Dicranopteris Bernardi) and Loxomataceae ( Loxoma Cunningham) (Takhtajan 1978; Tryon & Lugardon 1991; Russell et al . 1998).…”

Section: Discussionmentioning

confidence: 99%

“…It may be significant that similar morphological variation exists on the spores of the modern herbaceous lycophyte Phlegmariurus (Ramos Giacosa et al . 2016). The foveolate–fossulate sculpture of Phlegmariurus spores appears to be a stable feature of the genus, in contrast to the varied leaf morphologies related to different (terrestrial and epiphytic) ecologies of species.…”

Section: Discussionmentioning

confidence: 99%

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Maiaspora: a new miospore genus with enigmatic sculpture from the late Visean of European Russia

Mamontov

McLean

Орлова

et al. 2019

Papers in Palaeontology

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A new miospore genus, Maiaspora, is described from the upper Visean (middle Mississippian) of the southern wing of Moscow Syneclise (European Russia). Applying a combination of methods (optical light microscopy (LM), scanning‐electron microscopy, confocal laser microscopy (CLSM) and image analysis) to the same individual miospore specimens revealed a remarkable sculptural type for which we propose the new term ‘metareticuloid’. Metareticuloid sculpture is defined as a complex arrangement of muri with apiculate elements, polygonal lumina and circular scrobiculae at the base of the lumina. The discovery of fossil spores with metareticuloid sculpture allows the recognition of clear morphological differences between microreticulate and foveolate sculptures, which palynologists have historically had difficulty in separating. Virtual cross‐sections provided by CLSM show that miospores with metareticuloid sculpture display perfectly preserved, funnel‐shaped tunnels (like a gallery of cave stalactites) in the deep exospore. In contrast, miospores with microreticulate or reticulate and partly vermiculate sculpture lack such vertical tunnels (termed scrobiculae). The morphology of Maiaspora gen. nov. is considered in comparison with Microreticulatisporites (Knox non sensu Potonié & Kremp) Bhardwaj emended Oshurkova, Pseudoreticulatispora Bharadwaj & Srivastava emended Price & Foster, Vadaszisporites (Deák & Combaz) emended Juhász, Foveosporites Balme, Foveotriletes van der Hammen ex Potonié, Garotriletes Singh & Singh, Assamiasporites Mehrota & Sah, and Margotriletes Mehrota & Sah. The morphological conceptions of Microreticulatisporites and Foveotriletes are reinterpreted by numerical typification. The adaptative significance of metareticuloid sculpture is discussed in relation to modern and fossil spores, and in terms of harmomegathic mechanisms of angiosperm pollen.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Maiaspora: a new miospore genus with enigmatic sculpture from the late Visean of European Russia

Mamontov

McLean

Орлова

et al. 2019

Papers in Palaeontology

View full text Add to dashboard Cite

show abstract

“…The plants were collected and processed according to standard techniques for lycophytes (Bridson & Forman 1998) and the voucher specimens are kept in RCVC and MVFA herbaria. All taxa are arranged by alphabetical order and Author names of taxa were abbreviated according to the International Plant Names Index (IPNI) (Brummit & Powell 1992).Morphological descriptions were based on Arana & Øllgaard (2012) and and the descriptions of the spores are based mainly in Ramos Giacosa et al (2016).Mapping of geographic distributions employed Corel DRAW Graphics Suite X6 software. Geographical coordinates are given for all collected specimens.…”

Section: Methodsmentioning

confidence: 99%

A Revision of Lycopodiaceae from Uruguay

2017

International Journal of Advanced Research in Botany

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“…The following dormant forms were chosen as objects for studying thermally induced conformational transitions in the organic matrix: dormant eggs of the crustacean A. salinae, spores of Lycopodium sp., VLP SARS-CoV-2 vaccine, fresh shoots, shoot homogenate, and a reference sample made from K. dagermontiana. Samples of dormant eggs of A. salina, spores of Lycopodium sp., K. dagermontiana were tested for monodispersity [20][21][22] . Maximum size distribution: A. salina -250 µm, Lycopodium sp.…”

Section: Objects Of Studymentioning

confidence: 99%

Development of a technique for determining the viability of dormant organisms in powdered substances

Gaidashev,

Nikolaeva,

Syroeshkin

2024

J. Drug Delivery Ther.

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The purposes of pharmaceutical biotechnology and quality control of probiotics containing lyophilized bacterial preparations, as well as the purpose of ensuring biological safety, require methods for rapid determination of the viability of dormant forms. This paper describes an approach to determining the viability of dry powdered substances. Lyophilized powder of Kalanchoe daigermontiana, dry dormant eggs of Artemia salina, and dry powder of Lycopodium sp. spores were proposed as model objects. Suspensions of virus-like particles (VLPs) to SARS-CoV-2 were proposed as a cell-free reference material. The following methods of elemental analysis were used in the study: X-ray fluorescence spectroscopy (XRF) on an energy-dispersive device, atomic absorption spectroscopy with electrothermal atomization, and Zeeman background correction (GZ-AAS). The free water content was determined by NMR spin echo. A new method was also used for recording the kinetics of changes in broadband radio emission in the centimeter and millimeter wavelength ranges, with a measurement duration of up to 20 minutes. Live and inactivated powdered preparations of K. daigermontiana and A. salina were prepared and characterized by elemental composition, water content, and spin-spin relaxation time (T2). For these live and inactivated preparations, it was determined that the flux density of intrinsic thermal radio emission decreases by an order of magnitude with the loss of viability. In the future, the results obtained will allow for a rapid test of the viability of lyophilized therapeutics (from medicinal plants to bacterial mixtures that stabilize the intestinal microflora). Keywords: millimeter emission, X-ray fluorescence analysis, NMR spin echo, nanoparticles, powdered substances, medicinal plant raw materials

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Spore morphology and wall ultrastructure of Lycopodiaceae from northwest Argentina

Cited by 11 publications

References 18 publications

Maiaspora: a new miospore genus with enigmatic sculpture from the late Visean of European Russia

Maiaspora: a new miospore genus with enigmatic sculpture from the late Visean of European Russia

A Revision of Lycopodiaceae from Uruguay

Development of a technique for determining the viability of dormant organisms in powdered substances

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