Dos Nuevas Especies de Hechtia (Bromeliaceae) de México

Espejo‐Serna, Adolfo; López‐Ferrari, Ana Rosa; Ramírez‐Morillo, Ivón M.; Martínez-Correa, Nancy

doi:10.21829/abm78.2007.1033

Cited by 17 publications

(19 citation statements)

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“…Además, esos atributos seminales coincidieron con los descritos por otros investigadores en las semillas de otra localidad (Aljojuca, Puebla, México; km 15 carretera federal San Salvador El SecoEsperanza, 19°05'33'' N -97°32'17'' W, 2 500 msnm) y fechas (Espejo-Serna et al, 2007). Los resultados indicaron que esos atributos fueron notablemente estables entre las semillas y poblaciones de H. perotensis.…”

Section: Discussionunclassified

“…Las diferencias entre los años de recolecta de este estudio confirmaron indirectamente el riesgo de permanencia de la población endémica de H. perotensis, en la localidad de recolecta, dependiente de la calidad de las semillas y su capacidad para germinar y generar plantas normales en algunos ciclos de producción de semilla. Aunque no se tiene evidencia, podría sugerirse que algo similar sucede en las demás poblaciones hasta ahora conocidas del centrooeste de Veracruz y su porción limítrofe con Puebla, México (Espejo-Serna et al 2007).…”

Section: Discussionunclassified

“…La biología de las semillas de Hechtia se conoce poco (Espejo-Serna et al, 2007) y la información es escasa en la literatura especializada actual, probablemente debido a su importancia limitada para los humanos. Entre las excepciones, están las descripciones morfológicas de las semillas de H. nuusaviorum (Espejo-Serna et al, 2007) y H. confusa (Montes R., 2013); la evaluación de la germinación de las semillas de H. confusa y H. tehuacana en placas con agar, su fotoblastismo, reacción al estrés hídrico y al potencial osmótico del medio (Montes R., 2013); Escobedo (2012) utilizó semillas de H. schottii Baker en germinación para evidenciar la presencia de dos alas reducidas.…”

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“…Entre las excepciones, están las descripciones morfológicas de las semillas de H. nuusaviorum (Espejo-Serna et al, 2007) y H. confusa (Montes R., 2013); la evaluación de la germinación de las semillas de H. confusa y H. tehuacana en placas con agar, su fotoblastismo, reacción al estrés hídrico y al potencial osmótico del medio (Montes R., 2013); Escobedo (2012) utilizó semillas de H. schottii Baker en germinación para evidenciar la presencia de dos alas reducidas. Reyes (2015) señaló que las semillas del género Hechtia han sido útiles para la restauración ecológica por su resistencia a la sequía extrema y muchas de ellas tienen importancia ornamental; aunque el autor no especificó cuáles especies se recomiendan por su mejor capacidad germinativa.…”

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Viabilidad y germinación de semillas de Hechtia perotensis (Bromeliaceae)

Elizalde

García

Peña-Valdivia

et al. 2016

RBT

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Endemic populations of Hechtia perotensis have been described in Puebla and Veracruz, Mexico. Good quality seed collections can be used in conservation, research and ecological restoration. To evaluate seed quality of wild and endemic species, some compounds are used as effective promoters of germination, such as potassium nitrate (KNO3) and gibberellic acid (AG3), because they increase seed germination capacity and reduce latency. The triphenyl tetrazolium chloride (tetrazolium) test correlates seed viability because it is based on the activity of dehydrogenases in live tissues that catalyze mitochondrial respiration. The objective of this study was to obtain information on size and weight of capsules and seeds and seed germination and viability of H. perotensis, collected in Veracruz in the year 2012 and 2015. The hypotheses were 1) that seed germination and viability are independent of the year of collection, 2) that there is a tetrazolium concentration that can identify seed viability better than others, and 3) that pretreatment with KNO3 or AG3 improves seed germination. Seed germination was assessed using a completely randomized design with three treatments (control and the germination promoters 0.2 % KNO3 and 500 mg/L AG3), four treatments for the viability test (control, 0.2, 0.5 and 1.0 % of tetrazolium) and six replicates for each treatment. A total of one hundred seeds for germination experiments, and 25 seeds for the viability test were used. The results between and within years were analyzed with ANOVA and multiple comparison with the Tukey test. The proportion of non-germinated seeds was quantified along with the number of normal and abnormal seedlings, seeds with viable embryo, seeds without embryo, and seeds with low or no viability. On average, for the 2012 collected sample, 36 % had viable embryos, 7 % had low viability, 24 % were not viable and 33 % had no embryo. This result was significantly different from the 2015 sample, for which 87 % of seed showed viable embryos, 10 % had low viability, 0 % was not viable and 3 % had no embryo. Seed germination was also significantly different between years (22 and 92 %) Pregerminative treatments did not improve germination. Seed germination and viability of H. perotensis significantly varied between years of seed collection.

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Viabilidad y germinación de semillas de Hechtia perotensis (Bromeliaceae)

Elizalde

García

Peña-Valdivia

et al. 2016

RBT

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“…En los últimos 17 años se han logrado avances significativos en el conocimiento taxonómico-florístico de la familia, describiéndose para el país, entre 2000 y 2017, 78 especies (18.4 % del total conocido), es decir un promedio de 5 por año (Ehlers 2001, 2002a, b, c, 2003a, b, c, 2005a, b, c, 2006a, b, c, 2009, 2011, Espejo-Serna 2002, Ramírez-Morillo & Carnevali 2003, b, Espejo-Serna & López-Ferrari 2005, 2007, 2010, López-Ferrari et al 2006, 2011, Krömer et al 2007, Espejo-Serna et al 2007a, b, 2011, Flores-Cruz & Diego-Escobar 2008, Ramírez-Morillo 2008, 2014b, Martínez-Correa et al 2010, Burt-Utley et al 2011, Pinzón et al 2011, Ramírez-Morillo & Jiménez Nah, 2012 Contribución de los autores: Adolfo Espejo-Serna concibió la idea original y desarrolló el proyecto; planeó y condujo la recolección de material botánico de Bromeliaceae en varias regiones del país; recolectó e identificó material botánico; revisó, identificó y anotó material herborizado de Bromeliaceae en colecciones institucionales mexicanas y extranjeras; capturó la información en la base de datos; llevó a cabo el análisis de los datos y escribió el manuscrito. Ana Rosa López-Ferrari colaboró en el desarrollo del proyecto; recolectó e identificó material botánico de la familia procedente de varios estados del país; revisó, identificó y anotó material herborizado de Bromeliaceae en colecciones institucionales mexicanas y extranjeras; capturó la información en la base de datos; llevó a cabo el análisis de los datos y escribió el manuscrito.…”

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La familia Bromeliaceae en México

Espejo‐Serna

López‐Ferrari

2018

Bot. Sci.

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Background: Bromeliaceae family in Mexico has been the object of interest by botanists since 1789; their systematic study was approached from the 1970s onwards, and now there are significant advances in its taxonomic-floristic knowledge.Question: How many and which species of Bromeliaceae occur in Mexico? How they are distributed, and how many are endemic?Study site: México, 1887-2017.Methods: Based on the study of the Mexican Bromeliaceae, including botanical collection, literature review, and revision, analysis and determination of specimens in 50 herbaria, data about species richness, Mexican endemics, and distribution of their taxa in the country, were obtained.Results: In Mexico are represented four of the eight subfamilies of Bromeliaceae, 19 genera, 422 species, and 8 infraespecific taxa. The genera with the highest number of species in the country are Tillandsia (230/54.5 %), Hechtia (71/16.8 %) and Pitcairnia (50/11.8 %). 318 of the Bromeliaceae species are endemics to Mexico, as well as Ursulaea and Viridantha genera; 172 species are microendemic. The entity with the highest number of taxa is Oaxaca, followed by Chiapas, Veracruz and Guerrero. Tlaxcala and Baja California Sur have the lowest species number. Baja California, Baja California Sur, Campeche, Ciudad de México, San Luis Potosí, Sonora, Tabasco y Tlaxcala have not strict endemic taxa.Conclusion: Although progress in the knowledge of Mexican Bromeliaceae has been constant, exploration and recollection work is still required before concluding the Mexican bromeliad flora. It is also necessary to promote studies considering aspects of conservation and sustainable use.

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Floral biology and potential hybridization of three sympatric epiphytic bromeliads in Veracruz, Mexico

Ramírez‐Rosas¹,

Aguirre‐Jaimes

Ramírez‐Morillo

et al. 2020

Plant Species Biology

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In the Bromeliaceae, hybrids have been engineered for horticultural purposes; in addition, hybrids have been observed in natural habitats. We investigated the hybridization potential of three sympatric species of Tillandsia inhabiting secondary forests and shaded coffee plantations in the central mountains of Veracruz, Mexico. The studied species (T. juncea, T. polystachia and T. variabilis) show overlap in flowering phenology and are believed to share pollinators. We compared the floral morphology of the species, performed controlled intra-and interspecific pollinations, and recorded pollen tube growth, fruit and seed set, as well as seed germination. Flower size differed among the species, but stamen and stigma heights were similar between pairs of species, which would facilitate interspecific pollen exchange. Pollen tubes reached the ovary in interspecific crosses. The three species showed interspecific crosscompatibility, as all crosses resulted in development of mature fruit and viable seeds. Tillandsia juncea achieved the highest fruit set, whereas T. variabilis showed the highest seed set. Seed set as a result of agamospermy, autogamy, geitonogamy and interspecific cross-pollination did not differ among the species. The findings suggest that pre-and post-pollination barriers are weak among the three species of Tillandsia, which thus could potentially hybridize in natural sympatric populations. K E Y W O R D Sfruit and seed set, interspecific crosses, intraspecific crosses, seed germination, Tillandsia species | INTRODUCTIONPlant hybridization involves the mating of two closely or distantly related taxa, followed by the production of viable seeds, germination and growth of seedlings (Marques, Roselló-Graell, Draper, & Iriondo, 2007;Soltis & Soltis, 2009). The genetic and demographic effects derived from hybridization are among the leading causes of population decline (

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Dos Nuevas Especies de Hechtia (Bromeliaceae) de México

Abstract: Se describen e ilustran Hechtia nuusaviorum y H. perotensis. La primera es una especie endémica de Oaxaca y la segunda se conoce de los estados de Veracruz y de Puebla, de la región conocida como Valle de Perote.

Cited by 17 publications

References 2 publications

Viabilidad y germinación de semillas de Hechtia perotensis (Bromeliaceae)

Viabilidad y germinación de semillas de Hechtia perotensis (Bromeliaceae)

La familia Bromeliaceae en México

Floral biology and potential hybridization of three sympatric epiphytic bromeliads in Veracruz, Mexico

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