New Literature

Literature Archive: 2015 | 2016 | 2017 | 2018 | 2019

Not all members of the International Cichorieae Network do have access to botanical libraries. As a service we would like to point to recent publications regarding Cichorieae. However, some articles will escape our attention. Therefore, your hints to recent publications are always welcome. 


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11 March 2019

Urtubey E. & al. 2019: Systematics of Hypochaeris section Phanoderis (Asteraceae, Cichorieae). – Syst. Bot. Monogr. 106: 1–204.

Abstract:
“This revision treat the 41 South American species of Hypochaeris, plus the northwest African H. angustifolia, all now placed in a single monophyletic section Phanoderis. The New World species constitute subsection Phanoderis, and the single African species comprises subsection Africana. The species in South America represent a challenge in classification; molecular clock investigations suggest that the entire complex diverged approximately within the past 1 million years. From an ancestor in northwestern Africa, similar to the present-day H. angustifolia (the phylogenetic sister-species), have come 41 species in a relatively short geological time. These species are similar genetically; routine DNA sequencing with normal markers provides little differentiation. With Amplified Fragment Length Polymorphism (AFLP) analysis, distinct groups can be resolved, some with very strong statistical support other less so. Species arer morphologically reasonably well defined, but the differences are subtle, requiring field experience for accurate identification of taxa. ... Several new taxa and combinations are presented ...”

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11 March 2019

Uhlemann I., Eggert M., Schiemann J. & Thiele K. 2019: Zum Wiederanbau von Taraxacum koksaghyz (Asteraceae) als Kautschuklieferant in Deutschland. – Kochia 12: 19–35.

Abstract:
“Cultivation of diploid, sexual Taraxacum koksaghyz from Central Asia as rubber producer is re-established in Germany. The invasive capability of this species with regard to the native vegetation is extremely low, as shown in competition experiments in grassland and agricultural fields which led to a complete collapse of T. koksaghyz populations within one year. Hybridization events with native Taraxacum populations were not observed. The early stage of domestication of T. koksaghyz is characterized by an extraordinary morphological variability which is documented.”

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4 March 2019

Chubar E. A. 2018: онтогенез Nabalus ochroleucus (Asteraceae) [Ontogenesis of Nabalus ochroleucus (Asteraceae)]. – Bot. Zhurn. 103: 1240–1254.

Abstract:
“The life cycle of Nabalus ochroleucus is described in the paper. The results of our research show that the species belongs to pleiocyclic monocarpic plants with monopodial shoot system and short rhizome with adventitious root tubers, rather than to polycarpic perennials and taproot biennials. N. ochroleucus, N. acerifolius, N. tanakae, N. tatarinowii are characterized by similar features of the structure of shoots and root systems. In the taxonomy of the genus Nabalus, its ontogenetic and morphogenetic characters (life cycle, transformation of roots and shoot systems) should be taken into account along with anatomical and morphological features.”

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4 Mar 2019

Dudás M. & Zámečnik J. 2018: New records of Taraxacum cognatum Kirschner & Štěpánek from Western Slovakia. – Thaiszia 28: 1-5.

Abstract:
“In this paper, new sites of rare dandelions Taraxacum cognatum Kirschner & Štěpánek (sect. Palustria) from Strážovské vrchy Mts. are presented. The new populations represent the northern limit and important altitudinal pattern of the distribution of
the species in Slovakia. Despite the fact the species has not been classified in the New Slovak red list, we consider to evaluate T. cognatum as vulnerable species of the Slovak flora.”

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22 February 2019

Roma-Marzio F., Bartolucci F., Domina G. Peruzzi L. & Galasso G. 2018: (2662) Proposal to reject the name Hypochaeris urens (Asteraceae). – Taxon 67: 1225–1226.

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22 February 2019

Maslo S. & Šarić Š. 2018: Lesser Hawkbit, Leontodon saxatilis (Compositae): a new species in the flora of Bosnia and Herzegovina. – Phytol. Balcan. 24: 361–364.

Abstract:
“Lesser Hawkbit Leontodon saxatilis is reported as new to the flora of Bosnia and Herzegovina. The species has been found in several localities in Central Bosnia. The paper presents a short morphological description and photographs of the species based mainly on the collected specimens, as well as the distribution of the taxon.”

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22 February 2019

Vladimirov V. 2018: Hieracium petraeum (Asteraceae): a new casual record in the Bulgarian flora. – Phytol. Balcan. 24: 365–368.

Abstract:
“The  genus  Hieracium  is  notorious  for  its  taxonomic  complexity  due  to  its  specific  reproductive  system  involving normal sexual reproduction, hybridization, polyploidy, and apomixis. It is one of the largest genera worldwide  and  in  the  Bulgarian  flora.  So  far,  no  alien  Hieracium  species  has  been  reported  for  Bulgaria.  However,  fieldwork  in  the  Rila  Mts  resulted  in  the  discovery  of  a  taxon  of  the  Hieracium  amplexicaule collective species (Asteraceae), alien for the Bulgarian flora. Due to their ornamental appearance, plants from this group have been cultivated for more than 70 years in the yard of Sitnyakovo, the former King’s hunting lodge,  and  escaped  specimens  have  recently  been  recorded  in  the  nearby  natural  habitats.  Most  probably,  they belong to H. petraeum (syn. H. amplexicaule subsp. berardianum). A concise morphological description of the Bulgarian material is provided and the alien status of the population is discussed. The genome size and  ploidy  level,  2n  =  4x  =  36,  have  been  estimated  by  flow  cytometry.  The  text  is  illustrated  with  colour  photographs from the locality in the Rila Mts.”

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22 February 2019

Dunkel F. G. & Gottschlich G. 2018: Notes on some taxa of Hieracium and Pilosella (Asteraceae), new for the Greek flora. – Phytol. Balcan. 24: 217–224.

Abstract:
“During floristic investigation of the northern Greek flora, emphasis was laid on the genera Hieracium and Pilosella. As a result, six species and three subspecies of the genus Hieracium and three species of the genus Pilosella were detected in Greece for the first time and reported here. According to the original description and classification, three of these are suggested as meriting the species rank.”

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21 February 2019

Zahradníček J., Chrtek J., Ferreira M. Z., Krahulcová & Fehrer J. 2018: Genome size variation in the genus Andryala (Hieraciinae, Asteraceae). – Folia Geobot 53: 429–447.

Abstract:
“The genus Andryala includes diploid plants distributed in the Mediterranean Basin, Macaronesia and in one isolated outpost in the Romanian Carpathians. We analysed nuclear genome size in a phylogenetic framework and assessed relationships between genome size and life form (perennials vs annuals/biennials) and the consequences of insular vs continental distribution. Absolute nuclear genome size of 18 species or subspecies was determined using propidium iodide flow cytometry. The evolution of genome size was investigated using the Brownian motion model with the tree scaling parameters λ, κ and δ. The mean 2C values differs up to 1.84-fold between species (from 2.69 to 5.01 pg). Chromosome numbers of six species are reported for the first time. The highest 2C values are present in two well supported basal lineages corresponding to the relict species A. laevitomentosa and A. agardhii. The rest of Andryala species that form a well-supported clade of closely related species (the ‘Major Radiation Group’), except for two populations of A. ragusina, have significantly smaller genome sizes. In the ‘Major Radiation Group’, genome size in perennial species is significantly greater compared to annual and biennial species. With a possible bias caused by A. dentata and A. integrifolia, insular species of the ‘Major Radiation Group’ have lower nuclear genomes than continental ones. The genome size variation contains strong phylogenetic signal, which could indicate that genome size in the group under study is not greatly influenced by selection and is probably a result of neutral evolution or genetic drift.”

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21 February 2019

Roleček J., Fajmon K & Šmarda P. 2018: Nález hořčíku jestřábníkovitého velkoúborného (Picris hieracioides subsp. umbellata) v NPR Porážky (Bílé Karpaty) a poznámky k jeho výskytu v České republice [Record of Picris hieracioides subsp. umbellata in the White Carpathians and notes on its occurrence in the Czech Republic]. – Zprávy Českoslov. Bot. Společn. 53: 165–176.

Abstract:
Picris hieracioides (Asteraceae) is a polymorphic species with a complicated taxonomy. Here we report the occurrence of Picris hieracioides subsp. umbellata in the Czech Republic, a subspecies that has not been recognized in modern floras of this area. The identity of the recently found population in the White Carpathian Mts. was determined based on morphological characters and genome size. Further 62 specimens matching this subspecies morphologically were found during a revision of specimens in two major herbaria. They originate from various parts of the country, with the highest concentration in eastern Moravia. The recently found population inhabits a mesic tall-forb grassland dominated by Laserpitium latifolium and Calamagrostis arundinacea, a vegetation type hitherto undescribed from the Czech Republic, but scattered in the peri-Carpathian region. We consider this vegetation a relic from Early Holocene or even Pleistocene forest-steppe vegetation.”

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21 February 2019

Berjano R., Rodríguez-Castañeda N. L., Ortiz P. L., Ortiz M.A. & Arista M. 2018: The link between selfing and greater dispersibility in a heterocarpic Asteraceae. – Amer. J. Bot. 105: 2065–2074.

Abstract:
“Premise of the Study
Although an evolutionary link between breeding system and dispersibility has been proposed, to date empirical data and theoretical models of plants show contrasting trends.

Methods
We tested two competing hypotheses for the association between breeding systems and dispersibility in the heterocarpic Hypochaeris salzmanniana (Asteraceae) by using both an experimental approach and surveys over 2 years of five natural populations along an environmental cline with a gradient of pollinator availability.

Key Results
Hypochaeris salzmanniana
produced two types of fruits, beaked (BF) and nonbeaked (NBF), which differ in their dispersal ability. The BF were lighter and had a lower dropping velocity and higher dispersal distance than the NBF. Potential for long‐distance dispersal, measured as BF ratio per head, had high narrow‐sense heritability. Greater dispersibility and selfing ability were linked at all the scales studied. Both selfed BF and NBF fruits had longer plumes and lower plume loading than outcrossed fruits, characteristics that promote farther dispersal. Natural populations with a higher percentage of self‐compatible plants showed a higher BF ratio. Moreover, selfing led to a higher BF ratio than outcrossing.

Conclusions
The avoidance of inbreeding depression seems to be the most plausible selective pressure for the greater dispersibility traits of selfed seeds. Furthermore, the ability to modulate the BF ratio and thus the potential for long‐distance dispersal of offspring based on its selfed or outcrossed origin could be advantageous, and therefore selected, under unpredictable pollination environments that favor higher dispersive selfers, which overcome both pollen limitation and inbreeding avoidance.”

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21 February 2019

Mráz P.,  Zdvořák P., Hartmann M., Štefánek M. & Chrtek J. 2019: Can obligate apomixis and more stable reproductive assurance explain the distributional successes of asexual triploids in Hieracium alpinum (Asteraceae)? – Pl. Biol. 21: 227–236.

Abstract:
“Although reproductive assurance has been suggested to be one of the most important factors shaping the differential distributional patterns between sexuals and asexuals (geographic parthenogenesis), it has only rarely been studied in natural populations of vascular plants with autonomous apomixis. Moreover, there are almost no data concerning the putative relationship between the level of apomictic versus sexual plant reproduction on one hand, and reproductive assurance on the other.

We assessed the level of sexual versus apomictic reproduction in diploid and triploid plants of Hieracium alpinum across its distributional range using flow cytometric analyses of seeds, and compared the level of potential and realized seed set, i.e. reproductive assurance, between the two cytotypes under field and greenhouse conditions.

Flow cytometric screening of embryos and endosperms of more than 4,100 seeds showed that diploids produced solely diploid progeny sexually, while triploids produced triploid progeny by obligate apomixis. Potential fruit set was much the same in diploids and triploids from the field and the greenhouse experiment. While in the pollination‐limited environment in the greenhouse apomictic triploids had considerably higher realized fruit set than sexual diploids, there was no significant difference between cytotypes under natural conditions. In addition, sexuals varied to a significantly larger extent in realized fruit set than asexuals under both natural and greenhouse conditions.

Our results indicate that triploid plants reproduce by obligate apomixis, assuring more stable and predictable fruit reproduction when compared to sexual diploids. This advantage could provide apomictic triploids with a superior colonisation ability, mirrored in a strong geographic parthenogenesis pattern observed in this species.”

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31 January 2019

Marciniuk J., Marciniuk P. & Musiał K. 2018: Taraxacum mariae, a new species of T. section Palustria (Asteraceae) from Poland. – Phytotaxa 376: 207–213.

Abstract:
Taraxacum mariae J. Marciniuk & P. Marciniuk is a new triploid species of T. sect. Palustria. In terms of morphology it is closest to the group of T. brandenburgicum and T. bibulum. In the presented paper, the description of the new species, its distribution, diagnostic characters and habitat requirements are provided.”

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31 January 2019

Beharav A., Khalifa S. & Nevo E. 2018: New insights into the range, morphology, and natural hybridization of wild Lactuca aculeata in Israel. – Israel J. Pl. Sci. 65: http://dx.doi.org/10.1163/22238980-00001045

Abstract:
“In recent years we initiated extensive studies on the characterization of the population structure of wild Lactuca relatives (WLRs) originating from their center of origin and diversity in Southwest Asia. The objectives of our research program are related to the identification, collection, distribution, conservation and sustainable use of these unique plant genetic resources (PGR) for breeding. Natural populations of Lactuca aculeata Boiss., a wild lettuce, closely related and fully inter-fertile with cultivated lettuce, L. sativa L., were identified throughout northeastern Israel. The collection includes 485 seed samples, which is likely the largest and most diverse collection of this important WLR. Seeds were collected from 46 locations, representing its ecogeographic distribution in northeastern Israel. Together with 14 additional observed localities, we recorded our observations from a total of 60 native locations of L. aculeata. Thus, we assume that northeastern Israel is an ecological domain where natural L. aculeata populations can be found. The analyzed data allowed us to specify the borders of the growing area in the region, as well as to describe the ecological features of the habitats and altitude distribution of natural L. aculeata within the studied area. Notably, our data included new findings of native locations of L. aculeata on the western side of the watershed in Israel. Selected morphological characteristics, from the regeneration of 185 samples, verified the identity of all except one as L. aculeata. Some progenies (0.27%) of the original collected plants were identified as hybrids of L. aculeata x L. serriola.”

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31 January 2019

Jemelková M., Kitner M., Křístková E., Doležalová I. & Lebeda A. 2018: Genetic variability and distance between Lactuca serriola L. populations from Sweden and Slovenia assessed by SSR and AFLP markers. – Acta Bot. Croat. 77: 172–180.

Abstract:
“The study involved 121 samples of the common weed, Lactuca serriola L. (prickly lettuce), representing 53 populations from Sweden and Slovenia. The seed materials, originating from different habitats, were regenerated and taxonomically validated at the Department of Botany, Palacký University in Olomouc, Czech Republic. The morphological characterizations of the collected plant materials classified all 121 samples as L. serriola f. serriola; one sample was heterogeneous, and also present was L. serriola f. integrifolia. Differences in the amount and distribution of the genetic variations between the two regions were analyzed using 257 amplified fragment length polymorphism (AFLP) and 7 microsatellite (SSRs) markers. Bayesian clustering and Neighbor-Network were used for visualization of the differences among the samples by country. Under the Bayesian approach, the best partitioning (according to the most frequent signals) was resolved into three groups. While the absence of an admixture or low admixture was detected in the Slovenian samples, and the majority of the Swedish samples, a significant admixture was detected in the profiles of five Swedish samples collected near Malmö, which bore unique morphological features of their rosette leaves. The Neighbor-Network analysis divided the samples into 6 groups, each consisting of samples coming from a particular country. Reflection of morphology and eco-geographical conditions in genetic variation are also discussed.”

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25 January 2019

Fırat M. 2018: New status of Gundelia tournefortii L. forma purpurascens Bornm. (Asteraceae) and new record for the flora of Turkey. – Ot Sist. Bot. Derg. 25: 11–24.

Abstract:
Gundelia purpurascens (Bornm.) Fırat comb. & stat. nov. is proposed. Diagnostic and morphological characteristics, as well as full descriptions and the detailed photographs are provided. This taxon occurs in (Seqlawa) north Iraq and Şırnak (east Anatolia).”

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14 January 2019

Kim S.-H., Mejías J. A. & Kim S.-C. 2019: Next generation sequencing reveals the complete plastome sequence of newly discovered cliff-dwelling Sonchus boulosii (Asteraceae: Cichorieae) in Morocco. – Mitochondrial DNA Part B 4(1): 164-165.

Abstract:
The complete chloroplast genome sequences of newly discovered cliff-dwelling species of Sonchus, S. boulosii, were reported in this study. The S. boulosii plastome was 152,016 bp long, with the large single copy (LSC) region of 83,988 bp, the small single copy (SSC) region of 18,566 bp, and two inverted repeat (IR) regions of 24,731 bp. The plastome contained 130 genes, including 88 protein-coding, six ribosomal RNA, and 36 transfer RNA genes. The overall GC content was 31.2%. Phylogenetic analysis of 12 representative plastomes within the order Cichorieae suggests that S. boulosii is closely related to S. oleraceus.

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9 January 2019

Wolanin M. M. & Musiał K. 2918: Chorology and taxonomic issues of Taraxacum danubium and Taraxacum tortilobum (section Erythrosperma), new species to the Polish flora. – Wulfenia 25: 17–24.

Abstract:
“In the past 20 years, the interest in Taraxacum has considerably increased among Polish botanists, however, with the exception of marsh dandelions (Taraxacum section Palustria), the taxonomy and chorology of this group are still poorly examined. In 2012, comprehensive taxonomic-chorological studies on Taraxacum sect. Erythrosperma were launched in Poland. T. danubium and T. tortilobum, species previously unknown in Poland, were identified during this research. We found that these rare dandelion species occur in Poland regionally. Karyological analysis showed the triploid chromosome number (2n = 3x = 24) in both taxa. Current research results also suggest that the previously mentioned diploid T. erythropermum does not occur in Poland.”

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