Of dwarfs and giants: phylogeny of the Petasites-clade (Asteraceae–Senecioneae) and evolution of miniaturization in arctic–alpine environments

Steffen, Simone; Dillenberger, Markus S.; Kadereit, Joachim W.

doi:10.1007/s00606-016-1282-x

Cited by 10 publications

(9 citation statements)

References 28 publications

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“…Without severe disturbances, rhizome parts may reach substantial age (> 10 years), fully packed with carbohydrates and contributing to the persistence of these plant species. We do not see a consistent association of tall taxa with nutrient-rich locations as was suggested by Steffen et al ( 2016 ). While some of the studied tall herbs are clearly associated with fertile microhabitats (e.g., Rumex alpinus), others (e.g., Gentiana punctata ) are clearly not.…”

Section: Discussioncontrasting

confidence: 70%

Biomass allocation and seasonal non-structural carbohydrate dynamics do not explain the success of tall forbs in short alpine grassland

2021

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The majority of alpine plants are of small stature. Through their small size alpine plants are decoupled from the free atmospheric circulation and accumulate solar heat. However, a few alpine species do not follow that “rule” and protrude with their aboveground structures from the microclimatic shelter of the main canopy boundary layer. We aim at explaining the phenomenon of being tall by exploring the biomass production and carbon relations of four pairs of small and tall phylogenetically related taxa in alpine grassland. We compared species and stature-specific biomass allocation, shifts in non-structural carbohydrate (NSC) concentrations in different tissues throughout the season, and we used 13C labels to track carbon transfer from leaves to belowground structures. Small and tall herbs did not differ in their above- to belowground biomass allocation. The NSC composition (starch, fructan, simple sugars) and allocation did not show a stature-specific pattern, except for higher concentrations of simple sugars in tall species during their extended shoot growth. In relative terms, tall species had higher NSC pools in rhizomes, whereas small species had higher NSC pools in roots. Our findings do not place tall alpine forbs in an exceptional category in terms of biomass allocation and carbohydrate storage. The tall versus small stature of the examined herbs does not seem to be associated with specific adjustments in carbon relations. 13C pulse labelling revealed early C autonomy in young, unfolding leaves of the tall species, which are thus independent of the carbon reserves in the massive belowground organs.

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Section: Discussioncontrasting

confidence: 70%

Biomass allocation and seasonal non-structural carbohydrate dynamics do not explain the success of tall forbs in short alpine grassland

2021

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“…These two intergenic regions have been widely reported as the most divergent regions across Angiosperm lineages ( Shaw et al, 2007 ; Dong et al, 2012 ; Shaw et al, 2014 ), especially rpl32-ndhF in Asteraceae ( Timme et al, 2007 ; Salih et al, 2017 ; Zhang et al, 2017 ; Gichira et al, 2019 , Shahzadi et al, 2019 ; Zhang et al, 2019 ; Nie et al, 2020 ) and less frequently trnL-UAG-rpl32 ( Timme et al, 2007 ; Cho et al, 2019 ; Shahzadi et al, 2019 ; Shen et al, 2020 ). Numerous phylogenies in Asteraceae used trnL-UAG-rpl32 as a molecular marker (e.g., Freire et al, 2015 ; Loeuille, Keeley & Pirani, 2015 ; Loeuille et al, 2015 ; Padin, Calviño & Ezcurra, 2015 ; Soto-Trejo et al, 2015 ; Jara-Arancio, Vidal & Arroyo, 2018 ; Oberprieler et al, 2019 ), sometimes associated with ndhF-rpl32 ( Dillenberg & Kadereit, 2013 ; Steffen, Dillenberger & Kadereit, 2016 ; Gutiérrez-Larruscain et al, 2018 ; Gerschwitz-Eidt & Kadereit, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Extremely low nucleotide diversity among thirty-six new chloroplast genome sequences fromAldama(Heliantheae, Asteraceae) and comparative chloroplast genomics analyses with closely related genera

Loeuille

Thode

Siniscalchi

et al. 2021

PeerJ

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Aldama (Heliantheae, Asteraceae) is a diverse genus in the sunflower family. To date, nearly 200 Asteraceae chloroplast genomes have been sequenced, but the plastomes of Aldama remain undescribed. Plastomes in Asteraceae usually show little sequence divergence, consequently, our hypothesis is that species of Aldama will be overall conserved. In this study, we newly sequenced 36 plastomes of Aldama and of five species belonging to other Heliantheae genera selected as outgroups (i.e., Dimerostemma asperatum, Helianthus tuberosus, Iostephane heterophylla, Pappobolus lanatus var. lanatus, and Tithonia diversifolia). We analyzed the structure and gene content of the assembled plastomes and performed comparative analyses within Aldama and with other closely related genera. As expected, Aldama plastomes are very conserved, with the overall gene content and orientation being similar in all studied species. The length of the plastome is also consistent and the junction between regions usually contain the same genes and have similar lengths. A large ∼20 kb and a small ∼3 kb inversion were detected in the Large Single Copy (LSC) regions of all assembled plastomes, similarly to other Asteraceae species. The nucleotide diversity is very low, with only 1,509 variable sites in 127,466 bp (i.e., 1.18% of the sites in the alignment of 36 Aldama plastomes, with one of the IRs removed, is variable). Only one gene, rbcL, shows signatures of positive selection. The plastomes of the selected outgroups feature a similar gene content and structure compared to Aldama and also present the two inversions in the LSC region. Deletions of different lengths were observed in the gene ycf2. Multiple SSRs were identified for the sequenced Aldama and outgroups. The phylogenetic analysis shows that Aldama is not monophyletic due to the position of the Mexican species A. dentata. All Brazilian species form a strongly supported clade. Our results bring new understandings into the evolution and diversity of plastomes at the species level.

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“…[1] Their close relationship and younger evolutionary age compared to that of P. hybridus were recently supported by molecular evidence. [27] In our Table 1.…”

Section: Inter-and Intraspecific Variationsmentioning

confidence: 76%

“…Schistostigma) have also been recorded in Europe. [1] The latter species, evolutionary even younger than those previously mentioned, [27] is also present in Croatia. [25] According to Novotný et al, [28] both P. kablikianus and P. paradoxus cross very easily with P. albus and P. hybridus, while the last two species give hybrids very rarely, which supports their presumed parallel phylogenetic origin from the same parent taxa, a hybrid between P. albus and P. hybridus.…”

Section: Inter-and Intraspecific Variationsmentioning

confidence: 89%

Essential Oil Composition of Different Plant Parts from CroatianPetasites albus(L.) Gaertn.andPetasites hybridus(L.) G.Gaertn., B.Mey. & Scherb.(Asteraceae)

Friščić

Jerković

Marijanović

et al. 2019

Chemistry & Biodiversity

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Essential oil compositions of fresh leaves, flower stems and rhizomes obtained by hydrodistillation from different Croatian populations of Petasites albus (L.) Gaertn. and Petasites hybridus (L.) G.Gaertn., B.Mey. & Scherb. (four of each species) were investigated using gas chromatography‐flame ionization detection and gas chromatography‐mass spectrometry. Altogether, 118 constituents were identified, accounting for 81.19–96.81 % of total oil composition. All essential oils were characterized by oxygenated sesquiterpenes, with distinct compounds recorded for both investigated species. Clear separation between the two species was confirmed by principal component analysis and hierarchical cluster analysis. This is the first study that recorded intraspecific variations of essential oil constituents from P. albus and P. hybridus. Obtained results could contribute to the understanding of their medicinal and nutritional value.

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Of dwarfs and giants: phylogeny of the Petasites-clade (Asteraceae–Senecioneae) and evolution of miniaturization in arctic–alpine environments

Cited by 10 publications

References 28 publications

Biomass allocation and seasonal non-structural carbohydrate dynamics do not explain the success of tall forbs in short alpine grassland

Biomass allocation and seasonal non-structural carbohydrate dynamics do not explain the success of tall forbs in short alpine grassland

Extremely low nucleotide diversity among thirty-six new chloroplast genome sequences fromAldama(Heliantheae, Asteraceae) and comparative chloroplast genomics analyses with closely related genera

Essential Oil Composition of Different Plant Parts from CroatianPetasites albus(L.) Gaertn.andPetasites hybridus(L.) G.Gaertn., B.Mey. & Scherb.(Asteraceae)

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