High Level of Phenotypic Differentiation of Common Yew (Taxus baccata L.) Populations in the North-Western Part of the Balkan Peninsula

Tumpa, Katarina; Liber, Zlatko; Šatović, Zlatko; Medak, Jasnica; Idžojtić, Marilena; Vidaković, Antonio; Vukelić, Joso; Šapić, Irena; Nikl, Patricija; Poljak, Igor

doi:10.3390/f13010078

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Similar results (84% and 16%) were obtained in the study of [29] and in [64], where 11% of variation was found among and 89% within populations. Moreover, similar results were obtained in the morphometric studies of [66], where sexual dimorphism was studied in Serbia, and in a study of seven populations from the northwestern part of the Balkan Peninsula where variability was also found and was correlated with geographic structure [67].…”

Section: Discussionsupporting

confidence: 79%

Towards the Conservation of Monumental Taxus baccata L. Trees of Thasos Island: Genetic Insights

Malliarou,

Avramidou,

Ranis

et al. 2023

Forests

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Taxus baccata L. is a tertiary relict, long-lived, wind-pollinated dioecious tree species found throughout Europe. In the rocky mountains of Thasos island, monumental old trees create a unique area of natural beauty. In recent times, the need to implement conservation measures for key endangered species such as Taxus baccata has intensified. Exploring the genetic diversity of the species is a prerequisite for successful forest management decisions aimed at conservation. In this study, 28 monumental trees from two natural populations of Thasos were investigated using eight Simple Sequence Repeat markers in order to assess the levels of genetic diversity and genetic differentiation within the individuals, to estimate the degree of inbreeding and the effective population size of each population, and to discuss the impact this study has on conservation efforts for the species. Although the population size was small (14 individuals per population), the results showed moderate to high genetic diversity parameters. The mean expected heterozygosity was He = 0.649 and the number of effective alleles was Ne = 3.270 for both populations. Moreover, allelic richness (AR = 3.395) was high, indicating a variable genetic pool which is probably a result of a past established expansion of the species in the area. The results of the present study present a unique genetic pool harbored by specific trees, which is an important advantage for ensuring their conservation and resistance against biotic and abiotic threats. Our study paves the way towards conservation measures, which can be prioritized as follows: (a) in situ conservation, (b) seed bank establishment, and (c) in vitro propagation in order to secure future resilience and sustainability of the species.

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Section: Discussionsupporting

confidence: 79%

Towards the Conservation of Monumental Taxus baccata L. Trees of Thasos Island: Genetic Insights

Malliarou,

Avramidou,

Ranis

et al. 2023

Forests

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In vitro propagation, cold preservation and cryopreservation of Taxus baccata L., an endangered medicinal and ornamental shrub

Sahari Moghaddam,

Kaviani,

Mohammadi Torkashvand

et al. 2024

Acta Sci. Pol. Hortorum Cultus

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In vitro propagation, cold preservation, and cryopreservation are three essential approaches to preserve the genetic resources of red-listed plants, including English yew (Taxus baccata L.). Different concentrations of plant growth regulators (PGRs) and different pre-treatments of cold preservation and cryopreservation are the prerequisites of these three approaches. Apical bud as explant and Murashige and Skoog (MS) as the culture medium for all three sections of the research, kinetin (Kin) and indole-3-butyric acid (IBA) as PGRs for the micropropagation section, and encapsulation-dehydration as pre-treatment for the sections of cold preservation and cryopreservation were used. The results of the micropropagation section indicated that the highest number of shoots (5.40 per explant) and roots (5.98 per explant) were obtained from the culture of the explants on the media containing 1 mg L–1 IBA together with 1 and 2 mg L–1 Kin, respectively. The results of the cold preservation section revealed that the highest percentage of survival of germplasms (100%) after storage in the refrigerator was observed in the apical buds pre-treated by dehydration of encapsulated explants with 0.75 M sucrose for two hours, followed by dehydration under a laminar airflow cabinet for two hours. The results of the cryopreservation section demonstrated that the highest percentage of survival of germplasms (100%) after storage in liquid nitrogen was obtained in the apical buds pre-treated by encapsulation-dehydration under a laminar airflow cabinet for two hours. At the acclimatization stage, 100% of the plantlets acclimatized suitably with ex vitro conditions.

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Northern Provenances of Silver Fir Differ with Acclimation to Contrasting Light Regimes

Robakowski

Łukowski

et al. 2022

Forests

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Phenotypic differentiation of Abies alba was identified among selected provenances originating from the northern edge of this species’ natural geographic range. We posited that although the seed sources of the study populations were not geographically distant, progenies would differ with respect to growth, needle pigment concentration, and values of photochemical parameters in response to contrasting light conditions. Potted seedlings of six provenances were grown for two seasons under low light (LL, 40% of full irradiance) or high light (HL, 100% of full irradiance). The results showed that the provenances differed in diameter at root collar (DRC) and in relative growth rates of height (RGR). Seedlings grown in full light had a greater mean value of DRC than those in LL. LL increased total needle chlorophyll (Chltot) and carotenoid concentrations compared with HL, and Chltot was modified by the provenance of the seedlings. The provenance “Syców”, localized at the northern limit of the species range, showed the lowest value of maximal electron transfer rate (ETRmax) and lower values of growth parameters compared with the other study provenances. Relative growth rate, Chltot, and non-photochemical quenching of fluorescence (NPQ) were correlated with some climatic characteristics of seed stands and formed clusters indicating the local adaptation of the study populations. These results provide evidence of low intraspecific A. alba differentiation in terms of growth dynamics, photochemical capacity, and tolerance to different light regimes. The intraspecific diversity found in our study among the northern lead populations could be, however, important for the natural expansion of this species further north and for the selection of provenances to be used in the programme of the A. alba restoration in the Sudety Mountains, southern Poland, where decline of this species has been observed.

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High Level of Phenotypic Differentiation of Common Yew (Taxus baccata L.) Populations in the North-Western Part of the Balkan Peninsula

Cited by 3 publications

References 37 publications

Towards the Conservation of Monumental Taxus baccata L. Trees of Thasos Island: Genetic Insights

Towards the Conservation of Monumental Taxus baccata L. Trees of Thasos Island: Genetic Insights

In vitro propagation, cold preservation and cryopreservation of Taxus baccata L., an endangered medicinal and ornamental shrub

Northern Provenances of Silver Fir Differ with Acclimation to Contrasting Light Regimes

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