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

Corral-Aguirre, Juan; Sánchez-Velásquez, Lázaro Rafael

doi:10.1016/j.flora.2005.07.004

Cited by 26 publications

(12 citation statements)

References 19 publications

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“…These results coincide with those of reference [80] reported for M. perezfarrerae (64%) and M. sharpii (73%) with the mechanical scarification treatment (i.e., the seeds are placed in purified water and then the aril is manually removed). This treatment also proved to be effective with 90-100% germination in seeds of M. dealbata [74] and M. champaca (L.) Baill. ex Pierre [88] (73%) under the same treatment [89].…”

Section: Pre-germination Treatments Germination Tests and Dormancy Typesmentioning

confidence: 90%

“…Magnolia seeds have viability percentages ranging from 50-100% [74,75]. Different studies have shown a low percentage of germination because they can present different types of dormancy (including physical, chemical, mechanical, physiological and morphological) [76].…”

Section: Pre-germination Treatments and Seed Dormancymentioning

confidence: 99%

“…These percentages are lower than those recorded in other Magnolia species. For example, in [74] found 100% viability in seeds of M. dealbata Zucc. [85].…”

Section: Viability Testsmentioning

confidence: 99%

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How to Save Endangered Magnolias? From Population Biology to Conservation Action: The Case of Allopatric Radiation in Western Mexico

Vázquez-García¹,

Muñiz-Castro²,

Dahua-Machoa³

et al. 2021

Endangered Plants

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Numerous Neotropical Magnolia species are endangered and red-listed by the IUCN. Here we highlight major results from over a decade of research on endangered magnolias in western Mexico. Particularly, we compare three species of Magnolia (M. pugana, M. pacifica and M. vallartensis) along a large-scale continentality and moisture gradients, in terms of a) their morphological adaptations, b) genetic structure, diversity, and differentiation, c) reproductive phenology, and d) floral scents and their floral visitors. Fieldwork along this gradient unveiled two new species of Magnolia sect. Magnolia; M. granbarrancae and M. talpana. We found that most continental populations have a higher extinction risk than those with greater maritime influence, due to their lower genetic diversity, and greater fragmentation, isolation, and water stress. Also, these populations are more vulnerable to the environmental conditions predicted with the global warming climate scenarios. We share fieldwork experience and advise on pre-germination treatments and seed dormancy. We propose an ex-situ and in-situ conservation strategy, identify new challenges, and suggest future directions of collaborative work as a global Magnolia conservation consortium.

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Section: Pre-germination Treatments Germination Tests and Dormancy Typesmentioning

confidence: 90%

Section: Pre-germination Treatments and Seed Dormancymentioning

confidence: 99%

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How to Save Endangered Magnolias? From Population Biology to Conservation Action: The Case of Allopatric Radiation in Western Mexico

Vázquez-García¹,

Muñiz-Castro²,

Dahua-Machoa³

et al. 2021

Endangered Plants

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show abstract

“…M. dealbata has ornamental, medicinal, and pharmacological importance (Alonso-Castro et al 2014). Studies conducted on this species have mainly focused on demographic, ecological (Gutierrez and Vovides 1997, Corral-Aguirre and Sánchez-Velásquez 2006, Valladares et al 2006, Velazco-Macías et al 2008, Sánchez-Velásquez and Pineda-López 2010) and pharmacological (Martínez et al 2006, Domínguez et al 2009, Flores-Estévez et al 2013, Alonso-Castro et al 2014 aspects, as well as on in vitro propagation (Mata-Rosas et al 2006). These latter authors established a micropropagation protocol via somatic embryogenesis and suggested its use for propagation, conservation, and sustainable use.…”

Section: Introductionmentioning

confidence: 99%

Induction of somatic embryogenesis and evaluation of genetic stability in regenerated plants of Magnolia dealbata

Chávez-Cortázar¹,

Mata-Rosas²,

Oyama³

et al. 2020

Biologia plant.

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The utility of plant tissue culture for the mass propagation of trees is well known, but continuous in vitro multiplication of plant material may increase the possibility of somaclonal variation; therefore, it is essential to evaluate the genetic integrity of regenerants from species-specific in vitro protocols prior to mass production and implementation. The objectives of this study were: 1) to determine the effect of 2,4-dichlorophenoxyacetic acid (2,4-D) concentration over two cycles of secondary somatic embryogenesis in Magnolia dealbata; and 2) to verify the genetic stability of the regenerants obtained. The embryogenic response was not significantly affected by the concentration of 2,4-D but did vary across cycles of induction. The addition of 4.52 μM 2,4-D induced the highest total number of embryos (100.5), the mean number of somatic embryos (25.1) and somatic embryos per explant (80.6). In both 2,4-D concentration (2.26 or 4.52 μM), genetic integrity between the donor and the propagated clones was 0.90, and the low genetic instability (≤ 0.10 in both PGR treatments) might be due to effect of cyclic somatic embryogenesis or the different response of the explants at stress in in vitro culture conditions. However, it is necessary to examine more cell lines and somatic embryogenesis cycles.

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“…This somewhat paradox finding gives rise to questions about the persistence mechanisms and the nature of the disturbance affinity. Knowledge of the persistence mechanisms is fundamental for conservation management recommendations (Corral-Aguirre and Sanchez-Velasquez, 2006;Farnsworth, 2007). Adult J. atratus plants produce non-dormant seeds in large numbers that may be distributed by water during floods (K. Alsleben and M. Burkart, unpublished data).…”

Section: Introductionmentioning

confidence: 99%

Recruitment requirements of the rare and threatened Juncus atratus

Burkart

Alsleben

Lachmuth

et al. 2010

Flora - Morphology, Distribution, Functional Ecology of Plants

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

Cited by 26 publications

References 19 publications

How to Save Endangered Magnolias? From Population Biology to Conservation Action: The Case of Allopatric Radiation in Western Mexico

How to Save Endangered Magnolias? From Population Biology to Conservation Action: The Case of Allopatric Radiation in Western Mexico

Induction of somatic embryogenesis and evaluation of genetic stability in regenerated plants of Magnolia dealbata

Recruitment requirements of the rare and threatened Juncus atratus

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