Seed Germination of Magnolia dealbata Zucc. (Magnoliaceae), An Endangered Species from Mexico

Vovides, Andrew P.; Iglesias, Carlos

doi:10.21273/hortsci.31.5.877

Cited by 14 publications

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“…Los tratamientos que lograron el mayor porcentaje de germinación fueron la remoción manual del arilo y la lixiviación, ambos indicadores de latencia química (Baskin y Baskin, 1998). Este tipo de latencia se ha reportado para M. virginiana (Del Tredici, 1981), M. dealbata (Vovides e Iglesias, 1996), M. iltisiana (Saldaña-Acosta et al, 2001), M. obovata (Kim et al, 2007) y M. biloba (Hu et al, 2011). Los resultados también coinciden con Dirr y Heuser (1987) quienes reportaron que los arilos de Magnoliaceae contienen inhibidores que retrasan la germinación.…”

Section: Discussionunclassified

Germinación de semillas de Magnolia pugana (Magnoliaceae), especie endémica y en peligro de extinción del occidente de México

2016

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Magnolia pugana es una especie endémica y en peligro de extinción localizada en el occidente de México, que se distribuye en bosques de galería en las barrancas del sur de Zacatecas y centro-norte de Jalisco. El objetivo de este trabajo fue conocer la viabilidad de las semillas e identificar los tratamientos para romper la latencia de semillas de esta especie. Se colectaron semillas de cuatro localidades, tres en Jalisco (Centro Universitario de Ciencias Biológicas y Agropecuarias, San Lorenzo y San Nicolás) y una en Zacatecas (Palo Verde). Se aplicaron los siguientes tratamientos germinativos: (1) remoción manual del arilo, (2) remoción de arilo por lixiviación, (3) inmersión en ácido giberélico con 100 mg L-1, (4) inmersión en ácido giberélico con 200 mg L-1, (5) inmersión en ácido giberélico con 300 mg L-1 y (6) control. Se utilizaron 100 semillas por tratamiento con cinco repeticiones cada una. El tratamiento que presentó el mayor porcentaje de germinación para las cuatro localidades fue la remoción manual del arilo con 52 %, mientras que el tratamiento con menor germinación fue el control con 3.5 %. Por localidad, San Lorenzo obtuvo el mayor porcentaje de germinación con 16.5% en promedio, mientras que San Nicolás registró el menor con 5.33 %. Los tratamientos germinativos no lograron romper la latencia (porcentajes de germinación < 70 %). Las semillas de las cuatro localidades se embebieron de agua por lo que no se presenta la latencia física. Las semillas con mayor biomasa absorbieron menos agua.

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Section: Discussionunclassified

Germinación de semillas de Magnolia pugana (Magnoliaceae), especie endémica y en peligro de extinción del occidente de México

2016

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“…Magnolia dealbata is a species not too well-known, considered extinct until 1977 when it was rediscovered (Vovides and Iglesias, 1996). It is endemic to Mexico and its distribution is limited to six populations with few individuals, and few or no renewals, in the cloud forests of south-central Mexico, between 1400 to 2000 m above sea level (Hernández-Cerda, 1980).…”

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confidence: 99%

Somatic Embryogenesis and Organogenesis in Magnolia dealbata Zucc. (Magnoliaceae), an Endangered, Endemic Mexican Species

Mata-Rosas¹,

Jiménez-Rodríguez²,

Chávez-Ávila³

2006

HortSci

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Plants of Magnolia dealbata were regenerated from zygotic embryos through somatic embryogenesis and direct organogenesis. Medium and incubation conditions were determinating factors for the development of morphogenetic responses. Photoperiodic exposure was a limiting factor in the general development of the explants, and incubation in darkness allowed their development. The highest formation of shoots per responding explant were obtained on woody plant (WP) medium supplemented with 13.3 μM or 22.2 μM 6-benzylaminopurine (BA) in combination with 2.26 μM or in absence of 2,4-dichlorophenoxyacetic acid (2,4-D) from which 2.5 shoots per explant were induced. Subcultures on WP medium, supplemented with polyvinylpyrrolidone (PUP) 40,000 1 g·L–1) avoided necrosis of explants. Somatic embryos were formed in 85% of explants cultivated on WP medium with 2,4-D (2.3 μM or 4.5 μM); 20% induced indirect embryogenesis and 65% formed direct somatic embryogenesis. The plants were transferred to soil to acclimatize under greenhouse conditions, achieving 90% survival. Somatic embryo conversion to plantlets was obtained with subculture on WP basal medium without growth regulators. In vitro culture can play a key role in the propagation and conservation of this endangered species.

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“…The results of the treatments carried out here contrast with those of other authors, like those of Weaver (1987) who quotes unpublished studies, where no satisfactory germination was obtained for Magnolia splendens in Puerto Rico. Saldan˜a-Acosta et al (2001) studied in a similar way M. iltisiana, and Vovides and Iglesias (1996) M. dealbata; the greatest success in germination of both studies was less than 50%. Perhaps one the most important aspects to successfully germinate magnolia seeds is that the seeds must be always maintained in a moist environment (Vovides and Iglesias, pers.…”

Section: Article In Pressmentioning

confidence: 99%

“…M. dealbata is used, among others, in traditional medicine by Mexican natives (flowers), for fences and firewood (CATIE, 1998;Gutierrez and Vovides, 1997;Pattison, 1985;Va´zquez, 1994). Several pre-germination treatments (stratified at 0 1C for 10 days, and stratified at 5 1C for 0, 6, 7, 8, 9 and 10 months) with M. dealbata seeds have been tested, with a result of approximately 40% germination (reported in both: Gutierrez and Vovides, 1997;Vovides and Iglesias, 1996). Mass production of M. dealbata seedlings is necessary for its reintroduction in impoverished areas of cloud forest (Ramirez-Bamonde et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Seed ecology and germination treatments in Magnolia dealbata: An endangered species

Corral-Aguirre

Sánchez-Velásquez

2006

Flora - Morphology, Distribution, Functional Ecology of Plants

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Seed Germination of Magnolia dealbata Zucc. (Magnoliaceae), An Endangered Species from Mexico

Cited by 14 publications

References 0 publications

Germinación de semillas de Magnolia pugana (Magnoliaceae), especie endémica y en peligro de extinción del occidente de México

Germinación de semillas de Magnolia pugana (Magnoliaceae), especie endémica y en peligro de extinción del occidente de México

Somatic Embryogenesis and Organogenesis in Magnolia dealbata Zucc. (Magnoliaceae), an Endangered, Endemic Mexican Species

Seed ecology and germination treatments in Magnolia dealbata: An endangered species

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