Estructura morfo-anatómica y salida de dormición física de las semillas de Malvastrum coromandelianum ssp. coromandelianum (Malvaceae)

Galíndez, Guadalupe; Spahr, Diego Lopez; Gómez, Cecilia Paula; Pastrana‐Ignes, Valeria; Díaz, Rita Cecilia; Bertuzzi, Tania; Ortega–Baes, Pablo

doi:10.31055/1851.2372.v54.n4.24162

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…Several studies have demonstrated the effectiveness of this method on Astragalus gines-lopezii, Astragalus cicer, Parkia biglobosa, Malvastrum coromandelianum ssp, and Phillyrea angustifolia, as well as legume and vigna species. Germination percentages improved from 20% (controls) to between 73% and 100%, respectively [42][43][44][45][46][47][48]. This method eliminates the chalazal zone by creating spaces or cracks (rupture of the palisade tissues) to increase the permeability of the seed testa.…”

Section: Discussionmentioning

confidence: 99%

Seed Maturity and Its In Vitro Initiation of Chilean Endemic Geophyte Alstroemeriapelegrina L.

et al. 2022

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Alstroemeria pelegrina (A. pelegrina), a Chilean endemic, is considered vulnerable as its natural habitat is currently threatened. The decline in the reproductive capacity of the species due to anthropogenic impacts and climate change has made it imperative to address the problem by developing large-scale propagation methods. The objective of this study was to establish protocols for breaking the dormancy and in vitro germination of A. pelegrina seeds to speed up the germination and seedling production processes. The research began with morphological observations of the reproductive process, followed by in vitro sowing. The results showed that the seeds reached full maturity in 51 days, and physiological maturity in 41 days, at which point the seeds could be harvested for in vitro germination. The mechanical scarification pretreatment improves the in vitro germination rate to 96% and the germination time to 7 days, showing that the species is characterized by physical seed dormancy. On the other hand, if the seed coat incisions are deeper than 0.5 mm, 30% of the potential plants are lost due to embryo damage. The study provides scientific evidence for the feasibility of large-scale in vitro propagation of the species and establishes an efficient method of seedling production.

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Section: Discussionmentioning

confidence: 99%

Seed Maturity and Its In Vitro Initiation of Chilean Endemic Geophyte Alstroemeriapelegrina L.

et al. 2022

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“…In addition, the scarification of seeds demonstrated that dormancy of A. longifolia and A. mearnsii seeds (Milton and Hall 1981;Holmes 1989) is only physical, so any factor able to break the hard coat without causing damage to the embryo will promote germination in a few days. This is a very common type of dormancy among Leguminosae species, but it is not present in all (Ooi et al 2014;Galíndez et al 2019). Arán et al (2017) demonstrated in seeds of A. melanoxylon soil bank that not all seeds of soil bank respond to fire; there remains a part of dormant seeds that could break dormancy through other mechanisms, such as scarification by friction with soil particles or the expansion and contraction caused by summer temperatures.…”

Section: Discussionmentioning

confidence: 99%

Fire and seed maturity drive the viability, dormancy, and germination of two invasive species: Acacia longifolia (Andrews) Willd. and Acacia mearnsii De Wild

Riveiro

Cruz

Casal

et al. 2020

Annals of Forest Science

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& Key message Acacia longifolia and Acacia mearnsii exhibit different reproductive behavior (viability, germination, and dormancy) in relation to fire and seed maturation. The potential of invasion of A. longifolia is stronger than that of A. mearnsii. A. longifolia germinates abundantly between fires and after fires, while A. mearnsii only germinates after fire and needs higher thermal thresholds to break dormancy. & Context Fire affects environments through the modification of biological processes such as seed viability, dormancy, and germination. Seed maturation stage can modulate seed response to fire. Invasive alien species could be enhanced by forest fires. & Aims To analyze the viability, germination, and dormancy of two invasive alien species (Acacia longifolia and Acacia mearnsii) in relation to fire and seed maturation. & Methods Viability of seeds was obtained performing a tetrazolium test. Additionally, we obtained germination and dormancy in mature and fresh seeds simulating fire conditions through different levels of fire factors (smoke, ash, charcoal, and heat). & Results Control viability of seeds was 100% in the two Acacia species and maturation stages and severe heat reduced it to zero. Germination of A. longifolia varied depending on the maturation stage, being higher in fresh seeds. In A. mearnsii, germination did not change with maturation. In both species, heat stimulated germination by breaking seed dormancy. Seed maturation stage and fire factors affect the germination speed of each species differently. & Conclusion Fire reduces viability, stimulates germination, and breaks dormancy of the two species. Seed maturity exerts notable effects on A. longifolia reproductive behavior.

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Estructura morfo-anatómica y salida de dormición física de las semillas de Malvastrum coromandelianum ssp. coromandelianum (Malvaceae)

Cited by 2 publications

References 22 publications

Seed Maturity and Its In Vitro Initiation of Chilean Endemic Geophyte Alstroemeriapelegrina L.

Seed Maturity and Its In Vitro Initiation of Chilean Endemic Geophyte Alstroemeriapelegrina L.

Fire and seed maturity drive the viability, dormancy, and germination of two invasive species: Acacia longifolia (Andrews) Willd. and Acacia mearnsii De Wild

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