Pollen morphology of the tribe Lithospermeae of Boraginoideae in China and its taxonomic significance

Liu, Jiaxi; Li, Jingyu; Zhang, Yulong; Ning, Jicai

doi:10.1007/s00606-010-0350-x

Cited by 21 publications

(24 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Palynomorphology corroborates the molecular findings even more strongly. Our observations confirm the peculiar structure of the grains in Arnebia (including Macrotomia), as already known from previous investigations (e.g., Johnston 1954;Huynh 1971;Qureshi et al 1989;Perveen et al 1995;Liu et al 2010), and the sharply different traits of H. pulchra as described by Johnston (1954) and Huynh (1971), upon which the genus Huynhia was based (Greuter 1981). Based on this, Cohen's (2014: 15) statement that "pollen with 8-12 subequatorial pores is a synapomorphy of the clade composed of these three genera (Huynhia+Macrotomia+Arnebia)" cannot be supported.…”

Section: Discussionsupporting

confidence: 92%

“…Here, we show that A. purpurea is closer to Huynhia than to Arnebia especially in the presence of a single row of endoapertures along the equatorial belt, though it differs in the number of apertures, 6(7) vs. 9 as in H. pulchra. Hence, there is a palynological confirmation of the molecular data, corroborating the phylogenetic signal of pollen characters in Lithospermeae (Johnston 1954;Díez et al 1986;Cecchi & Selvi 2009;Weigend et al 2009;Liu et al 2010;Cohen 2011).…”

Section: Discussionsupporting

confidence: 65%

See 1 more Smart Citation

Arnebia purpurea: a new member of formerly monotypic genus Huynhia (Boraginaceae-Lithospermeae)

Coppi¹,

Nocentini²,

Selvi³

2015

Phytotaxa

View full text Add to dashboard Cite

The taxonomic position and affinities of the rare Turkish endemic Arnebia purpurea are analyzed using nuclear and plastid DNA sequence data and morphological characters. Phylogenetic analysis of a wide sample of old-world Lithospermeae consistently retrieved a clade with this species sister to Huynhia pulchra, the only member of the genus Huynhia. All other members of Arnebia s.l. (including Macrotomia) formed a separate clade subdivided in two lineages corresponding to the groups of the annual and the perennial species. Consequently, Arnebia does not appear monophyletic. Floral and palynological characters support the affinity of A. purpurea to Huynhia pulchra, in especially the stamens inserted at different heights in the corolla tube and the pollen grains with a single row of endoapertures along the equatorial belt. We therefore advocate the placement of A. purpurea in Huynhia and propose a new combination, implying that the latter is no longer a monotypic genus but includes two species with a sharply allopatric range in the Middle-East. Further studies with additional markers and a wider taxon sampling will help to elucidate relationships in Arnebia s.l..

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 65%

Arnebia purpurea: a new member of formerly monotypic genus Huynhia (Boraginaceae-Lithospermeae)

Coppi¹,

Nocentini²,

Selvi³

2015

Phytotaxa

View full text Add to dashboard Cite

show abstract

“…Onosma and Echium differ mainly in the tectum ornamentation, which is punctate-perforate, more or less scabrate to rugulate in the former (see also Binzet, Erkara, € Ozler, & Pehlivan, 2014) and reticulate, microreticulate to foveolate in the latter. This character has been considered 'evolutionarily more advanced' (Liu et al, 2010), while M. orientale, and apparently Pontechium as well, are clearly closer to Onosma in their nearly smooth tectum that may represent the plesiomorphic condition in the Onosma-Echium s.l. clade.…”

Section: Discussionmentioning

confidence: 99%

“…Pollen morphology is often a valuable source of information in the systematics of Lithospermeae because of the wide variation and phylogenetic signal, especially at the genus level (Cecchi & Selvi, 2009;Johnston, 1953;Liu, Li, Zhang, & Ning, 2010;Weigend, Gottschling, Selvi, & Hilger, 2009). Numerous species of Echium, Lobostemon, and Echiostachys have been investigated in previous works (e.g.…”

Section: Discussionmentioning

confidence: 99%

A reappraisal of the genus Megacaryon (Boraginaceae, Lithospermeae) based on molecular, morphological, and karyological evidence

Selvi

Hilger

Coppi

2017

Systematics and Biodiversity

View full text Add to dashboard Cite

The systematic position and phylogenetic relationships of Echium orientale, a rare endemic of the mountains of northern Turkey, were elucidated based on morphological, molecular, and karyological evidence.Using nuclear and plastid DNA sequences, we found that this species is not included in Echium, but is rather at least as divergent from it as other related lineages, namely the South African Lobostemon and Echiostachys. Pollen characters revealed a strong affinity with Onosma, especially in the non-reticulate ornamentation of the tectum. Fruit morphology is unique in the genera of the Echium 'alliance' (e.g. Echium, Pontechium, Lobostemon, and Echiostachys), because of the large size and the smooth, glossy nutlet surface as in most species of Onosma. Karyological observations show that this species is diploid with 2n D 12, and differing from both Lobostemon or Echium, where nearly all species have higher numbers (usually 2n D 14 and 2n D 16, respectively). Combined with a 'megaherb' habit, the weak zygomorphism of the large flowers and a restricted range in the humid mountain forests of the Black Sea region, fruit, pollen and chromosome characters suggest an isolated position for E. orientale in the Echium alliance. We therefore propose its placement in the monotypic Megacaryon, a genus originally described by Boissier, but largely disregarded by later botanists. An original specimen is designated as generic lectotype.

show abstract

“…Several palynologists have demonstrated the importance of the palynological characters to understand the taxonomy, ecology and evolution of Boraginaceae (e.g. Díez et al, 1986;Ning et al, 1992;Scheel et al, 1996;Retief & Van Wyk, 1997;Liu et al, 2010). Pollen morphology has been used as a valuable tool in delimiting genera within Cynoglosseae (Barbier & Mathez, 1973) and in suggesting several evolutionary hypotheses (Clarke et al, 1979;Bigazzi et al, 2006).…”

mentioning

confidence: 99%

Pollen morphology of the genusOmphalodesMill. (Cynoglosseae, Boraginaceae)

Coutinho

Castro

Carbajal

et al. 2012

Grana

View full text Add to dashboard Cite

Pollen morphology of the tribe Lithospermeae of Boraginoideae in China and its taxonomic significance

Cited by 21 publications

References 3 publications

Arnebia purpurea: a new member of formerly monotypic genus Huynhia (Boraginaceae-Lithospermeae)

Arnebia purpurea: a new member of formerly monotypic genus Huynhia (Boraginaceae-Lithospermeae)

A reappraisal of the genus Megacaryon (Boraginaceae, Lithospermeae) based on molecular, morphological, and karyological evidence

Pollen morphology of the genusOmphalodesMill. (Cynoglosseae, Boraginaceae)

Contact Info

Product

Resources

About