Flora palinológica de los helechos y licofitas de Río Malila, Hidalgo, México

Gómez‐Noguez, Felipe; Pérez-García, Blanca; Mendoza-Ruíz, Aniceto; Orozco‐Segovia, Alma

doi:10.17129/botsci.410

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…In the same way, the spores of Equisetum L. present elaters that temporarily aggregate the spores in clusters and also act as a dispersal mechanism (Marmottant et al, 2013). For lycophytes, this kind of dispersal was reported for several species of the heterosporous Selaginella such as S. stenophylla (Gómez‐Noguez et al, 2013), S. convoluta (Arn.) Spring, and S. lepidophylla (Hook & Grev.)…”

Section: Discussionmentioning

confidence: 64%

Terminal velocity of fern and lycopod spores is affected more by mass and ornamentation than by size

Gómez‐Noguez

Domínguez‐Ugalde

Flores‐Galván

et al. 2022

American J of Botany

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Premise Terminal velocity (Vt) is an important factor for the dispersal of biological particles but has scarcely been studied for anemochorous fern spores, and the influence of spore characteristics on Vt has not been evaluated. Here, we measured the Vt of 1234 spores of 18 fern species and two Selaginella microspores using videoimaging analysis and evaluated the effects of mass, size, and ornamentation on Vt. Methods We designed a sedimentation tower with a graduated microtelescope attached to a high‐speed video camera to record falling particles and measure the Vt of fern spores using video‐image processing software. Spores were measured for each species and their size correlated with Vt. Results The Vt of fern spores ranged from 4.7 cm·s−1 (Cyathea costaricensis) to 18.85 cm·s−1 (Acrostichum danaeifolium). The method is accurate and reliable as predicted by Stokes model for glass beads of known density and size. In addition, Vt had a higher correlation coefficient with mass (ρ = 0.72) than size (ρ = 0.20), and ornamental appendages reduced Vt. Conclusions The reported values of Vt of fern spores are within the range of different biological airborne particles such as moss spores and pollen grains of seed plants. The results showed that spore ornamentation is directly related to Vt rather than spore size and may increase or decrease the drag. This method will aid future aerobiological research on biological particles.

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Section: Discussionmentioning

confidence: 64%

Terminal velocity of fern and lycopod spores is affected more by mass and ornamentation than by size

Gómez‐Noguez

Domínguez‐Ugalde

Flores‐Galván

et al. 2022

American J of Botany

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“…Ejemplares: Pérez-Jiménez 34, 55, 58, 78, 91, 124, 136, MEXU folio:1465157. Para Asplenium monanthes el diámetro polar de las esporas en este trabajo se reportó de 25-30 μm y el ecuatorial de 25-50 μm (Tabla 1), considerablemente menores a 39-45 μm y 53-60 μm, diámetros reportados por Tryon & Lugardon (1991) y Gómez-Noguez et al (2013), posiblemente esta variación en tamaño se deba a que esta especie pertenece a un complejo (Dyer et al 2012) Asplenium praemorsum Sw.-Esporas monoletes con perisporio evidente, hasta 8 μm de ancho. VP: elipsoidal con márgenes irregulares por el pliegue del perisporio.…”

Section: Resultsunclassified

“…En México se han realizado estudios palinológicos locales para helechos y licofitas. Entre ellos se destacan los realizados para Nuevo León (Arreguín-Sánchez & Aguirre-Claverán 1990), el Valle de México (Arreguín-Sánchez 1985, Querétaro (Arreguín-Sánchez et al 1996 y en Hidalgo (Gómez-Noguez et al 2013). Sin embargo, es necesario continuar con el estudio de estas estructuras para seguir contribuyendo al conocimiento de la palinología en México.…”

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Estudio Palinológico de los helechos y licofitas de la Zona Núcleo Poniente de la Reserva Ecológica del Pedregal de San Ángel, Ciudad de México, México

Pérez-Jiménez¹,

Eslava-Silva²,

Jiménez‐Durán³

et al. 2020

Bot. Sci.

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Introducción: La Reserva Ecológica del Pedregal de San Ángel (REPSA) corresponde a un matorral xerófilo. En ella, los helechos y licofitas crecen en diversos microhábitats. En esta zona se han realizado investigaciones ecológicas y taxonómicas de la vegetación donde se han incluido las pteridofitas, sin embargo, no existen estudios palinológicos para este grupo de plantas. Pregunta: ¿Cuál es la micromorfología de las esporas de las especies de helechos y licofitas de la REPSA? Especies bajo estudio: Helechos y licofitas. Sitio de estudio: Zona Núcleo Poniente (ZNP) de la Reserva Ecológica del Pedregal de San Ángel, Ciudad Universitaria, Ciudad de México, México. Agosto 2013 a septiembre 2016. Métodos: Se recolectaron en campo ejemplares de referencia de helechos y licofitas, se identificaron y se depositaron en el Herbario Nacional (MEXU). Se obtuvieron las esporas a partir de pinnas fértiles, se montaron para observarse y medirse en microscopía fotónica (MF) y microscopía electrónica de barrido (MEB). Se obtuvieron las microfotografías y se realizó la descripción palinológica. Resultados: Se presenta la palinología de 23 especies de helechos y dos de licofitas, correspondientes a 16 géneros. Se describe por primera vez la micromorfología de las esporas de: Gaga decomposita, G. membranacea, Myriopteris allosuroides, Pellaea cordifolia, Pellaea villosa, Pleopeltis thyssanolepis, Ophioglossum engelmannii y Selaginella sartorii. Para las restantes especies se complementa y/o corrobora la micromorfología. Conclusiones: Los datos aportados contribuyen al conocimiento palinológico de las especies de licofitas y helechos presentes en la REPSA, y son caracteres de gran utilidad para la taxonomía de las especies.

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“…Se revisaron un total de 256 preparaciones para ambas localidades. La determinación de los palinomorfos se llevó a cabo utilizando la literatura especializada de los siguientes autores: Accorsi et al, (1994); Arreguín-Sánchez et al, (1996); Bravo-Chinguel et al, (2014); Carrasco-Velázquez et al, (2008); Fagri e Iversen (1989); Gómez-Noguez et al, (2013); González-Quintero (1969); Graham (1976b); Graham (1999); Graham & Dilcher (1998);Jiménez (1996); Kapp (1969); Leonhardt y Lorscheitter ( 2007); Luz et al, (2013); Macedo et al, (2009); Montoya-Pfeiffer et al, (2014), Palacios y Rzedowski (1993), Palacios-Chávez et al, (1991;…”

Section: Análisis Cualitativosunclassified

Reconstrucción paleoflorística a partir de los conjuntos palinológicos recuperados de los lacustres Villa Alegría y Cerro Prieto en el Valle de Tehuacán-Cuicatlán, Puebla y Oaxaca

Torres

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Paleofloristic reconstruction based on the palynological assemblages recovered from lacustrine Villa Alegria and Cerro Prieto of the Tehuacan-Cuicatlan Valley, Puebla andOaxaca.The main objective of this research was to reconstruct the paleoflora of Lacustrine Villa Alegria (named by Dávalos-Álvarez, 2006) and the Cerro Prieto travertine through paleopalynological analysis, in addition to establishing palynofloristic affinities with other Neogene and Paleogene formations found in Mexico. The study area includes two localities situated within the Tehuacan-Cuicatlan Valley: Lacustrine Villa Alegria to the north of the valley in Puebla State, and the Cerro Prieto travertine in the south of the valley, Oaxaca State. In Lacustrine Villa Alegria, three sections were prospected and a total of 45 travertine rock samples were collected. In the Cerro Prieto travertine, five sections were prospected and a total of sixty samples were collected. All samples were processed under the conventional method of extracting fossil pollen (Traverse, 2007). In Lacustrine Villa Alegria, 44 samples contained a total of 18,389 palynomorphs was counted, of which 2,240 pertain to pollen and spores, while the rest were algae and fungal spores. 68 taxa were identified, of which 80% (n = 55) match angiosperms, 5.9% (n = 4) match gymnosperms and 14.7% (n = 10) are spores. In the Cerro Prieto travertine, of the 60 processed samples 58 were positive. Sums of 14,935 palynomorphs were counted there, of which 2546 pertain to pollen and spores and 12,412 are algae and fungal spores. 53 taxa were identified, of which 71.7% (n = 38) match angiosperms, 7.5% (n = 4) are gymnosperms and 20.7% (n = 11) pertain to spores.The paleopalynological assemblages recovered from both locations were plotted with the Tilia Graph (Grimm, 1997) program. They were analyzed using the CONISS method in order to determine palynozones. In sections VA-2 and VA-3 of Lacustrine Villa Alegria, the most abundant floristic element was Fraxinus sp., followed by Alnus sp. and Asteraceae. In section VA-1 the dominant element was Bursera sp., followed by Anacardiaceae. In most sections of the Cerro Prieto travertine, the genera that dominated palynological assemblages were Fraxinus sp, Quercus sp. and Pinus sp. Bursera sp. was dominant in section CP-3 of said locality. Two palynozones were defined in all Lacustrine Villa Alegria and Cerro Prieto travertine sections; they were characterized by different taxa, and the greatest diversity of species was found to be concentrated mid-section. Richness (S), diversity (H') and evenness (J') of the taxa recovered within the palynological assemblages were analyzed.In Lacustrine Villa Alegria, the highest level of richness was obtained in section VA-3 with S = 2 and the highest Shannon Wiener diversity rate was obtained in section VA-2 with H'= 2.95, as well as the highest value of the Pielou evenness index with J '= 0.77. For the Cerro Prieto travertine, the highest richness value was obtained from section 3 with S = 38, the highest diversity was...

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Flora palinológica de los helechos y licofitas de Río Malila, Hidalgo, México

Cited by 11 publications

References 30 publications

Terminal velocity of fern and lycopod spores is affected more by mass and ornamentation than by size

Terminal velocity of fern and lycopod spores is affected more by mass and ornamentation than by size

Estudio Palinológico de los helechos y licofitas de la Zona Núcleo Poniente de la Reserva Ecológica del Pedregal de San Ángel, Ciudad de México, México

Reconstrucción paleoflorística a partir de los conjuntos palinológicos recuperados de los lacustres Villa Alegría y Cerro Prieto en el Valle de Tehuacán-Cuicatlán, Puebla y Oaxaca

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