Topic
Athanasia
About: Athanasia is a research topic. Over the lifetime, 22 publications have been published within this topic receiving 267 citations.
Papers
TL;DR: Within South African Asteraceae-Anthemideae there is a group of genera containing furanosesquiterpenes rather than the common polyacetylenes, which have been investigated morphologically especially with respect to fruit structure and there are 25 new combinations in Afhanasia, Znulanthera, Hymenolepis and Phymaspermum.
Abstract: Within South African Asteraceae-Anthemideae there is a group of genera containing furanosesquiterpenes rather than the common polyacetylenes. Of these genera, Asaemia (Harv.) Ham. ex Benth. & Hook., Athanasia L., Eumorphia DC., Gymno-pcnfzia Benth., Phymaspermum Less. and Sfilpnophyfon Less. have been investigated morphologically especially with respect to fruit structure. As a result of the investigations Stilpnophyton has been reduced to synonomy under Athanasia L. emend. Kallersjo (with 36 spp.) and five species of Athanasia, together with Phaeocephalus S. Moore., are placed in the revived genus Hymenolepis Cass. (with 7 spp.). Brachymerk DC. and four misplaced species of Aihanasia are included in Phymaspermum Less. emend. Kallersjo (with 17 spp.). Nine other misplaced species of Athanasia and one Pentzia Thunb. species have been described as a new genus Inulanihera Kallersjo (with 10 spp.), a group without furanosesquiterpenes. The two monotypic genera Asaemia and Gymnopentzia, and Eumorphia (with 6 spp.) remain unchanged. The interrelationships of the genera possessing furanosesquiterpenes are shown in a cladogram. There are 25 new combinations in Afhanasia, Znulanthera, Hymenolepis and Phymaspermum.
51 citations
TL;DR: The investigation of two further South African Athanasia -species afforded, in addition to known compounds, sixteen new ones, ten guaianolides, an eudesmanolide, three sesquiterpenes, a new enediynene and a phenylpropane derivative.
39 citations
TL;DR: Transmission electron microscopy was used to investigate the development and ultrastructure of the cuticles of the bladder primordium and other parts of Utricularia, the stem of Cuscuta gronovii, and the leaves of Athanasia parviflora, where the first-formed cuticle was very electron dense and apparently amorphous in texture.
Abstract: Transmission electron microscopy was used to investigate the development and ultrastructure of the cuticles of the bladder primordium and other parts of Utricularia, the stem of Cuscuta gronovii, and the leaves of Athanasia parviflora. In all materials investigated, except the apical meristem of Cassytha pubescens, the first-formed cuticle, named the procuticle, was very electron dense and apparently amorphous in texture. Later, the procuticle changed its ultrastructural appearance: in all species having a procuticle it lost much of its electron density. Simultaneously, it developed into a lamellar structure in U. lateriflora and Cuscuta, and became part of a lamellar cuticle proper. In U. sandersonii and Athanasia the procuticle generally remained without visible structure. The velum of the pavement epithelium of Utricularia is considered to be a slightly modified procuticle which has become loosened from the epithelial cells and stretched.
27 citations
TL;DR: The essential oil obtained from hydrodistillation of flowering aerial parts of Athanasia brownii (Asteraceae) showed a moderate activity against streptococci as well as radical‐scavenging potential, while the inhibitory effects against human cancer cells examined were significant.
Abstract: a ) b The essential oil obtained from hydrodistillation of flowering aerial parts of Athanasia brownii (Asteraceae) was studied for its chemical composition by GC/FID and GC/MS, and for biological activity, namely, antioxidant, antimicrobial, and chemopreventive potential, by DPPH ( ¼ 2,2-diphenyl-1- picrylhydrazyl), ABTS ( ¼ 2,2'-azinobis(3-ethylbenzothioline-6-sulfonic acid), and FRAP ( ¼ ferric reducing antioxidant power), disk diffusion test, and MTT ( ¼ 3-(4,5-dimethylthiazol-2-yl)-2,5-diphe- nyltetrazolium bromide) assay, respectively. The oil was characterized by a high content of oxygenated sesquiterpenes (71.2%), with selin-11-en-4a-ol (24.6%), caryophyllene oxide (8.7%), humulene epoxide II (5.1%), and (E)-nerolidol (4.9%) as the predominant compounds. The oil showed a moderate activity against streptococci as well as radical-scavenging potential, while the inhibitory effects against human cancer cells examined such as A375 (malignant melanoma) and HCT 116 (colon carcinoma) were significant, with IC50 values of 19.85 and 29.53 mg/ml, respectively.
27 citations
TL;DR: The aerial parts of Inulanthera calva afforded in addition to flavones, rare prostaglandin-like acids, balchanin, costunolide, ludartin and two new phenylacetates of isomeric eudesmanolides.
26 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 2 |
| 2015 | 1 |
| 2014 | 2 |
| 2013 | 3 |
| 2011 | 1 |
| 2009 | 1 |