Seed survival in Chilean Nothofagus in response to desiccation and storage

León‐Lobos, Pedro; Ellis, R. H.

doi:10.1079/ssr2005204

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…Most species in the genus Nothofagus exhibit seed dormancy (Cabello 1987(Cabello , 2004Leon-Lobos and Ellis 2005;Wilcox and Ledgard 1983), although not all to the same extent (Wardle and Campbell 1976). Cold stratification and treatments with growth regulators are most commonly used to overcome this type of dormancy (Baskin and Baskin 2014;Hartmann and Kester 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-germinative treatments on <i>Nothofagus glauca</i> seed germination and seedling growth

Cabello

Espinoza²,

Espinoza

et al. 2019

NZJFS

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Background: Nothofagus glauca (Phil.) Krasser (Nothofagaceae, “Hualo”) is an endemic tree of the Mediterranean zone of Chile. The natural forests in this area have been severely fragmented as a result of human causes such as replacement by agricultural crops and fast-growing tree species. From 1975, these forests have declined from 900,000 ha to 145,000 ha, so it is categorised on the IUCN Red List as ‘vulnerable’. In restoring this ecosystem, efforts should focus, in part, on the propagation of quality stock. However, information on propagation systems is still insufficient. Methods: We aimed to analyse the effect of different pre-germinative treatments and sowing times on seed germination, and seedling growth and quality. The pre-germinative treatments were: (i) cold stratification; (ii) soaking in gibberellic acid (GA3) and thiourea solution; and (iii) nursery cultivation, while the sowing times were July, August and September. Results: A high germination capacity was achieved by: soaking the seeds in GA3 solution irrespective of concentration; stratifying, irrespective of period; or soaking in 7.5 mg L-1 thiourea solution, values significantly varied from that of the control treatments. The sowing time was not relevant in terms of the percentage of germination or seedling development. Stratification at 5°C for 60 days produced the best quality indices for N. glauca seedlings but no significant differences were found in any of the morphological attributes tested as a result of the pre-germinative treatments. Conclusions: The pre-germinative treatments significantly improved the germination and seedlings growth of N. glauca. Cold stratification at 5°C for 60 days is recommended as it produced suitable seedlings for field establishment. Gibberellic acid and thiourea did not produce important effects on seedling growth. Our results suggest the presence of endogenous physiological dormancy of the N. glauca seeds. The results of this study provide important information on propagation and nursery techniques of N. glauca, which can be used in restoration programmes.

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Section: Introductionmentioning

confidence: 99%

Effect of pre-germinative treatments on <i>Nothofagus glauca</i> seed germination and seedling growth

Cabello

Espinoza²,

Espinoza

et al. 2019

NZJFS

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“…Most of the species of the genus Nothofagus possess an endogenous dormancy (Wilcox & Ledgard 1983; León‐Lobos & Ellis 2005), although not all of them with the same level (Wardle & Cambell 1976). The treatments most commonly employed to overcome this type of dormancy are cold stratification and soaking seeds in gibberellins, especially in gibberellic acid (GA 3 ) (Hartmann & Kester 1998; Barceló‐Coll et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Propagation and Seedling Cultivation of the Endemic Species Nothofagus alessandrii Espinosa in Central Chile

Santelices

Navarro-Cerrillo

Drake

2011

Restoration Ecology

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Nothofagus alessandrii is an endemic and endangered species from the Maule Region of Central Chile. The forests it once dominated have been severely degraded and fragmented by human activities, and it is estimated that only 350 ha remain. Yet, available information for propagation and nursery plant cultivation of this species is conspicuously lacking. Future efforts to restore this ecosystem type will rely, in large part, on advancing the capacity to propagate and cultivate this highly threatened species. To this end, we studied the response (germination process and nursery growth) of viable seeds of N. alessandrii to different pre-germination treatments, sowing times, and slow-release fertilizer. The highest germination percentages were obtained with cold stratification for periods of 30 and 45 days (84.9 and 82.6%, respectively). Sowing time was also relevant, with seeds obtaining highest germination rates (53%) when sowing during spring season (September) as well as the best growth rates. Both cold stratification and GA 3 treatments can provide adequate germination percentage and similar seedling quality. After one nursery season, no clear effect of slow-release fertilizer on plant growth was observed. The results of this study provide important baseline information for propagation and nursery techniques for restoration programs of N. alessandrii.

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“…Recently fallen Nothofagus seeds are frequently vain, probably because of self-fertilization, or subjected to pre-and post-dispersal predation (Burschel et al, 1976;Bustamante, 1996). Calderón-Valtierra et al (1995), Escobar and Donoso (1996) and León-Lobos and Ellis (2005) proposed combinations of temperature, humidity, substrate and hormones to improve emergency. Germination of N. alpina was always greater than that of N. obliqua, both in laboratory (25% higher) and nursery (80%), and germination of N. dombeyi was null in both settings.…”

Section: Dezzotti and Poncementioning

confidence: 99%

Early Development of Nothofagus (Nothofagaceae) Species From the Subantarctic Forest Under Experimental Conditions of Light, Substrate and Ecological Interaction

Dezzotti

Ponce

2018

CERNE

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EARLY DEVELOPMENT OF Nothofagus (NOTHOFAGACEAE) SPECIES FROM THE SUBANTARCTIC FOREST UNDER EXPERIMENTAL CONDITIONS OF LIGHT, SUBSTRATE AND ECOLOGICAL INTERACTION DEZZOTTI, A.; PONCE, O. Early development of Nothofagus (NOTHOFAGACEAE) species from the subantarctic forest under experimental conditions of light, substrate and ecological interaction. CERNE, v. 24, n. 2, p. 149-161, 2018. HIGHLIGHTS In Nothofagus, positive correlation between seed weight and emergence in laboratory and nursery tests would be linked to the higher nutrient content of heavier seeds. High emergence and survival of N. obliqua and N. alpina, and higher growth of three Nothofagus species with high irradiation, would be adaptations to colonize open areas. The experimental results are compatible with patterns and processes found in this Nothofagus mixed forests, in which the interaction with Chusquea culeou plays a key role. In Nothofagus, deep mineral soil with large moisture increased emergence and survival, whereas litter reduced emergence; germination of C. culeou was very abundant and increased tree mortality.

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Seed survival in Chilean Nothofagus in response to desiccation and storage

Cited by 6 publications

References 17 publications

Effect of pre-germinative treatments on <i>Nothofagus glauca</i> seed germination and seedling growth

Effect of pre-germinative treatments on <i>Nothofagus glauca</i> seed germination and seedling growth

Propagation and Seedling Cultivation of the Endemic Species Nothofagus alessandrii Espinosa in Central Chile

Early Development of Nothofagus (Nothofagaceae) Species From the Subantarctic Forest Under Experimental Conditions of Light, Substrate and Ecological Interaction

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