Micromorphological and anatomical studies on petals of 11 Turkish Onosma L. (Boraginaceae) taxa

Akçin, Öznur Ergen

doi:10.3329/bjpt.v16i2.3928

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…150 species distributed throughout Anatolia, the Near East and the Mediterranean. Several studies have been conducted on morphological and anatomical features of selected species of Onosma (Qureshi & Qaiser 1987, Maggi et al 2008, Akçin 2009, Binzet & Akçin 2009, Binzet et al 2010, Akçin et al 2013, Koyuncu et al 2013), but few attempts have been made to study the evolutionary history and diversification of the genus, although Teppner gathered karylogical data on the genus (e.g. Teppner 1971Teppner , 1980Teppner , 1991aTeppner , 1991b, and Kolarčik et al (2010b, Cecchi et al (2011) and Mehrabian et al (2011) conducted molecular studies.…”

Section: Introductionmentioning

confidence: 98%

Patterns of pollen stainability in polyploids of the genus Onosma (Boraginaceae)

Kolarčik¹,

Ducár²,

Kačmárová³

et al. 2015

Plecevo

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Background and aims -The genus Onosma (Boraginaceae) is a taxonomically and phylogenetically very complex plant group, with several taxa of hybrid or polyploid origin. An extensive pollen viability survey within the genus could help to solve some evolutionary or taxonomic incertainties within the genus, but it has never been performed. The aim of the present study is to determine the degree of pollen viability of selected species of various ploidy levels and to investigate if microevolutionary processes, such as polyploidization and hybridization, are associated with variation in pollen viability. Methods -Pollen staining with lactophenol blue was chosen as an indirect method for determining pollen viability. Ploidy level information was obtained from an extensive literature search. In mixed populations, the ploidy level of individuals was determined based on flow cytometry screening. Key results -Considerable variation in pollen stainability is present among taxa of Onosma. Pollen stainability is high in most diploids (72-98% in mean), allotetraploids (90%) and allohexaploids (97%), but lower in autotetraploids (71%) and allotriploids (2-49%). At the population level, considerable variation in pollen stainability was found in the allotriploid O. arenaria (14-83%), while the taxonomically related allotetraploid O. pseudoarenaria is less variable (71-99%). Conclusion -This study shows the value of the staining method in the study of the genus Onosma. Low pollen stainability appears to be associated with autopolyploidization as well as recent hybridization processes suggesting the presence of microsporogenesis or microgametogenesis abnormalities. In contrast, pollen stainability is high in stabilized allopolyploids indicating proper meiosis with maintenance of homologous pairing of parental chromosomes and correct pollen development.

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Section: Introductionmentioning

confidence: 98%

Patterns of pollen stainability in polyploids of the genus Onosma (Boraginaceae)

Kolarčik¹,

Ducár²,

Kačmárová³

et al. 2015

Plecevo

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“…Floral micromorphological characteristics observed using scanning electron microscopy (SEM) have proven to be useful for taxonomic delimitation and phylogenetic inference of various groups, including Adoxaceae (Konarska, 2017), Crassulaceae (Giuliani et al, 2018), Nymphaeaceae (Coiro and Barone Lumaga, 2018), Lentibulariaceae (Płachno et al, 2019), and Rosaceae (Song et al, 2020). Notably, taxonomic and systematic relevance of floral micromorphology, including that of the corolla, calyx, style, and stigma, has been confirmed within Boraginaceae (Bigazzi et al, 1999;Bacchetta et al, 2000;Bigazzi and Selvi, 2000;Akçin, 2009).…”

Section: Introductionmentioning

confidence: 99%

Dissection for Floral Micromorphology and Plastid Genome of Valuable Medicinal Borages Arnebia and Lithospermum (Boraginaceae)

et al. 2020

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The genera Arnebia and Lithospermum (Lithospermeae-Boraginaceae) comprise 25–30 and 50–60 species, respectively. Some of them are economically valuable, as their roots frequently contain a purple-red dye used in the cosmetic industry. Furthermore, dried roots of Arnebia euchroma, A. guttata, and Lithospermum erythrorhizon, which have been designated Lithospermi Radix, are used as traditional Korean herbal medicine. This study is the first report on the floral micromorphology and complete chloroplast (cp) genome sequences of A. guttata (including A. tibetana), A. euchroma, and L. erythrorhizon. We reveal great diversity in floral epidermal cell patterns, gynoecium, and structure of trichomes. The cp genomes were 149,361–150,465 bp in length, with conserved quadripartite structures. In total, 112 genes were identified, including 78 protein-coding regions, 30 tRNA genes, and four rRNA genes. Gene order, content, and orientation were highly conserved and were consistent with the general structure of angiosperm cp genomes. Comparison of the four cp genomes revealed locally divergent regions, mainly within intergenic spacer regions (atpH-atpI, petN-psbM, rbcL-psaI, ycf4-cemA, ndhF-rpl32, and ndhC-trnV-UAC). To facilitate species identification, we developed molecular markers psaA- ycf3 (PSY), trnI-CAU- ycf2 (TCY), and ndhC-trnV-UAC (NCTV) based on divergence hotspots. High-resolution phylogenetic analysis revealed clear clustering and a close relationship of Arnebia to its Lithospermum sister group, which was supported by strong bootstrap values and posterior probabilities. Overall, gynoecium characteristics and genetic distance of cp genomes suggest that A. tibetana, might be recognized as an independent species rather than a synonym of A. guttata. The present morphological and cp genomic results provide useful information for future studies, such as taxonomic, phylogenetic, and evolutionary analysis of Boraginaceae.

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“…Petal morphology has major taxonomic importance and corolla color, shape and size are used as taxonomic characters in this genus. [ 24 ] However, detailed observations of the micromorphology and anatomy of petals of most of the Onosma species are lacking[ 25 ] as described in Table 2 . The genus presents considerable taxonomic difficulties, particularly in central and south east Europe, which cannot be resolved without experimental investigation.…”

Section: Morphologymentioning

confidence: 99%

Onosma L.: A review of phytochemistry and ethnopharmacology

Kumar¹,

Kumar²,

Kishore

2013

Phcog Rev

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The genus Onosma L. (Boraginaceae) includes about 150 species distributed world-wide in which only about 75 plants has been described for its morphology and less than 10 plants for their chemical constituents and clinical potential. The phytochemical reports of this genus revels that it comprise mainly aliphatic ketones, lipids, naphthazarins, alkaloids, phenolic compounds, naphthoquinones, flavones while most important are shikonins and onosmins. The plants are traditionally used as laxative, anthelmintic and for alexipharmic effects. The plants are also equally use in eye, blood diseases, bronchitis, abdominal pain, stangury, thirst, itch, lecoderma, fever, wounds, burns, piles and urinary calculi. The flowers of various plants are prescribed as stimulants, cardiotonic, in body swelling while leaves are used as purgative and in cutaneous eruptions. The roots are used for coloring food stuffs, oils and dying wool and in medicinal preparations. This review emphasizes the distribution, morphology, phytochemical constituents, ethnopharmacology, which may help in future research.

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Micromorphological and anatomical studies on petals of 11 Turkish Onosma L. (Boraginaceae) taxa

Cited by 10 publications

References 6 publications

Patterns of pollen stainability in polyploids of the genus Onosma (Boraginaceae)

Patterns of pollen stainability in polyploids of the genus Onosma (Boraginaceae)

Dissection for Floral Micromorphology and Plastid Genome of Valuable Medicinal Borages Arnebia and Lithospermum (Boraginaceae)

Onosma L.: A review of phytochemistry and ethnopharmacology

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