Growth and biomass partitioning of nine provenances of <i>Quillaja saponaria</i> seedlings to water stress

Diaz, C.Jimenez; Espinoza, Sergio; Poch, Paola; Abarca, Betsabé; Grez, Iván; Martínez, E.; Yáñez, Marco A.; Santelices, Rómulo; Cabrera, Antonio

doi:10.2989/20702620.2018.1512789

Cited by 8 publications

(7 citation statements)

References 26 publications

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“…Variability in germination among populations was reported in other forest species and shrubs [ 58 , 59 , 60 , 61 ] and is attributed to genetic differences and climatic and geographic effects [ 62 ]. The Mediterranean-type climate area of central Chile has a diversity of climatic conditions due to its geography and latitudinal variation in germination capacity and early performance was observed in species of the Nothofagus genus [ 61 , 63 , 64 ] and sclerophyllous species including C. alba [ 37 , 65 , 66 ]. In our study, the success of seed germination and survival of C. alba was significantly determined by the seed source, where only the local seed source CA showed some survival at the end of the experiment.…”

Section: Discussionmentioning

confidence: 99%

The Recruitment of the Recalcitrant-Seeded Cryptocarya alba (Mol.) Looser, Established via Direct Seeding Is Mainly Affected by the Seed Source and Forest Cover

Diaz

Saavedra

Meza

et al. 2022

Plants

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Natural regeneration of recalcitrant-seeded tree species is strongly limited in Mediterranean-type climate zones due to increasing droughts imposed by climate change. Direct seeding can be a low-cost alternative to seedling establishment, but there is still limited information for some species. This study aimed to assess the effects of the seed source and forest cover on the germination and survival of the endemic Cryptocarya alba Mol. established through direct seeding. Three habitat types differing in forest cover were identified within the natural park Reserva Natural Altos de Cantillana, Metropolitan Region, Chile. The forest cover corresponded to open (canopy density <25%), semi-dense (canopy density around 50%), and dense forest (canopy density >75%). All forest cover had C. alba as one of the dominant species. At each habitat type, 38 families from four seed sources (Cuesta La Dormida (CD), Antumapu (AN), Cantillana (CA, local seed source) and Cayumanque (CY)) were directly seeded. Germination (Germin) and survival (Surv) were evaluated weekly during one growing season. There were significant differences between seed sources in Germin and Surv, with means values varying from 7.8% to 37% for Germin and 0% to 20% for Surv. The local seed source CA had the highest values in both traits. A significant variation was also observed between families within seed sources only for Germin. The dense forest cover had the highest Germin (22%) and Surv (55%) results compared to the other forest cover types, which was partially associated with differences in soil moisture, temperature, and bulk density. Due to the most frequent droughts in these Mediterranean-type climate zones, the use of local seeds on dense forest cover is recommended for the direct seeding of the species in the initial recruitment.

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Section: Discussionmentioning

confidence: 99%

The Recruitment of the Recalcitrant-Seeded Cryptocarya alba (Mol.) Looser, Established via Direct Seeding Is Mainly Affected by the Seed Source and Forest Cover

Diaz

Saavedra

Meza

et al. 2022

Plants

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“…On the other hand, Q. saponaria and C. alba are species that share habitats and distributions. Both species develop in Mediterranean-type climates and semi-arid to humid environments and seem to be less adapted to drought (i.e., germination is zero at −1000 kPa) in comparison to P. chilensis [ 55 , 56 , 57 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of the Soil Matric Potential on the Germination Capacity of Prosopis chilensis, Quillaja saponaria and Cryptocarya alba from Contrasting Geographical Origins

Faúndez

Diaz

Martínez-Herrera

et al. 2022

Plants

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As a consequence of the megadrought in Central Chile, it is expected that most of the distribution of woody species will be narrowed in the northern limits because of restrictions imposed by soil matric potential on seed germination. In this study, we analyzed the effect of the soil matric potential on seed germination and initial recruitment of the sclerophyllous species Prosopis chilensis, Quillaja saponaria and Cryptocarya alba from contrasting geographic origins (i.e., seed sources). We evaluated the germination capacity (%) under different matric potentials (i.e., 0, −6, −33, −750 and −1250 kPa) for 100 days. Soil matric potential of −1250 kPa negatively affected the germination capacity of the three species. P. chilensis seeds stopped germinating under soil matric potential close to −1200 kPa, whereas in Q. saponaria and C. alba the complete inhibition of germination was under −1000 kPa. Seed sources also differed in their germination capacity by soil matric potential: northern seed sources of P. chilensis germinated with the lowest soil matric potential. There was no clear trend in Q. saponaria and C. alba, but in general, southern seed sources performed better than the northern ones. The results showed that Ѱm in the soil played an important role in the germinative capacity against different seed source origins, but not in soils with a north–south gradient.

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“…Studies with species from Mediterranean-type climate areas (e.g., Quercus ilex L. and Quillaja saponaria Mol.) have shown that seed germination and seedling survival is high in provenances with annual precipitation close to 500 mm, whereas the lowest germination and survival values were reported in provenances with annual precipitation close to 900 mm (Caliskan, 2014;Magni et al, 2019). In field experiments with B. miersii it was found that seedling survival improved with irrigation, and the response depended on the site canopy conditions and the presence of leaf litter (Kremer et al, 2019), whereas, under laboratory conditions, seedling survival was not affected by irrigation (Becerra et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Provenance influences seed germination and phenotypic responses to water restriction in the endemic Beilschmiedia miersii (Gay) Kosterm

Diaz¹,

Poch²,

Espinoza³

et al. 2023

Front. For. Glob. Change

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The higher drought intensity recorded in the last decades in the Mediterranean zone of Chile increased the level of threats of the endemic Beilschmiedia miersii (Gay) Kosterm and has raised concern about its capacity to face drought. In this study, we assessed the effect of seed provenance and mother tree on seed germination traits, seedling growth, biomass allocation, presence of cotyledons, and survival responses of B. miersii cultivated under two water treatments (well-watered versus water stress. Average pre-dawn plant water potentials of −0.9 and −4.5 MPa, respectively). The germination stage of this trial showed significant differences in germination capacity, germination energy, and the maximum value of Czabator. Provenances from the southern range of the species, with higher precipitation (Cantillana and El Arbol) had a better germination performance, however, once germinated, the ability of the seedlings to survive in the nursery was high only in two of the five provenances under study. The coastal and interior provenances with lower precipitations (El Pobre, Longotoma, and Antumapu) were not able to survive to the seedling stage (<5% survival). Seedling growth and survival varied significantly between the two remaining provenances and the two watering treatments. The provenance El Arbol, exhibited a higher survival, growth, presence of cotyledons, and biomass traits. This provenance also exhibited a higher presence of cotyledons in both watering treatments and an unaltered root to shoot ratio between the well-watered and the water stress treatments. Our results suggests that there is important phenotypic variation for seed germination and seedling survival associated to the provenance origin, emphasizing the importance of a nursery-evaluation phase before the beginning of restoration projects at the landscape level.

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Growth and biomass partitioning of nine provenances of Quillaja saponaria seedlings to water stress

Cited by 8 publications

References 26 publications

The Recruitment of the Recalcitrant-Seeded Cryptocarya alba (Mol.) Looser, Established via Direct Seeding Is Mainly Affected by the Seed Source and Forest Cover

The Recruitment of the Recalcitrant-Seeded Cryptocarya alba (Mol.) Looser, Established via Direct Seeding Is Mainly Affected by the Seed Source and Forest Cover

Effect of the Soil Matric Potential on the Germination Capacity of Prosopis chilensis, Quillaja saponaria and Cryptocarya alba from Contrasting Geographical Origins

Provenance influences seed germination and phenotypic responses to water restriction in the endemic Beilschmiedia miersii (Gay) Kosterm

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