Results 171 to 180 of about 2,565 (201)

Bioactive Phenolics and Free Radical Scavenging Activity of Takhtajania perrieri (Winteraceae)

GSC Advanced Research and Reviews
Background: Takhtajania perrieri is a critically endangered plant species endemic to Madagascar, belonging to the Winteraceae family. Known as a "living fossil," its rarity and protected status have limited extensive research into its traditional uses ...
Ralaivaon-dratsitonta Jumaël Edith Fabrice, Andrianjato Tartin, Andrianarijaona Mamy, Rasolofonirina Hubert Xavier, Fatiany Pierre Ruphin, Randrianasolo Rivoarison   +5 more
semanticscholar   +1 more source

Placentation in Exospermum stipitatum (Winteraceae)

Botanical Gazette, 1978
Exospermum, of the primitive vesselless angiosperm family Winteraceae, has been described as differing from other genera in the family in having ovules scattered over the internal walls of the carpels. Studies of developing carpels with the scanning electron microscope revealed that ovules are initiated in a single row on each of the two placentas, as ...
F. B. Sampson, Shirley C. Tucker
openaire   +1 more source

Cytotoxic sesquiterpenoids from Winteraceae of Caledonian rainforest

Phytochemistry, 2009
One secobutanolide, two butanolides and six drimane sesquiterpenoids were isolated from the bark and leaves of Zygogynum pancheri and Zygogynum acsmithii (Winteraceae) along with six known drimanes, isodrimanial, 1beta-O-p-methoxy-E-cinnamoyl-bemadienolide, 7-ketoisodrimenin, drimenin, polygodial and 1beta-E-cinnamoyl-6alpha-hydroxypolygodial.
Allouche, Noureddine, Apel, Cécile, Martin, Marie-Thérèse, Dumontet, Vincent, Guéritte, Françoise, Litaudon, Marc   +5 more
openaire   +2 more sources

TAXONOMY IN WINTERACEAE

TAXON, 1988
SummaryAfter a review of a number of characters of the Winteraceae, two topics are discussed. Firstly, it is argued that determination factors of place, size, form, and function of petals and stamens can become unlocked and fixed again in a different way, giving rise to a new form: the stamen with a petaloid appendage, which consequently has to be ...
openaire   +1 more source

Winteraceae

1973
Diese archaische Angiospermenfamilie, deren Existenz vor etwa 110 Millionen Jahren durch Pollenfunde in Israel belegt wurde (1), fesselt Biologen unablassig. In blutenbiologischer Hinsicht liegen interessante neue Beobachtungen mit Zygogynum bicolor und baillonii und Exospermum stipitatum von Neukaledonien vor; die stark duftenden Bluten locken Kafer ...
openaire   +1 more source

Chemical constituents derived from Drimys brasiliensis Miers (Winteraceae)

Natural Product Research, 2013
Phytochemical investigation on Drimys brasiliensis afforded the isolation and characterisation of four drimane sesquiterpenes: polygodial (1), warburganal (2), 1-β-(p-coumaroyloxy)polygodial (3) and 1-β-(p-methoxycinnamoyl)polygodial (4), as well as four flavonoids: quercitrin (5), astilbin (6), isoastilbin (7) and neoastilbin (8).
Murillo C, Mecchi, João Henrique G, Lago   +1 more
openaire   +2 more sources

Anatomy of the Secondary Phloem in Winteraceae

IAWA Journal, 1984
The secondary phloem of nine species in five genera of Winteraceae was examined with regard to features that could serve for taxonomic and phylogenetic evaluation of the family. The species examined were as follows: Bubbia pauciflora, B. semecarpoides, Drimys lanceolata, D.
Katherine Esau, Vernon I. Cheadle
openaire   +1 more source

Carpel Development in Tasmannia insipida (Winteraceae)

International Journal of Plant Sciences, 1996
Angiosperm carpels are closed (sometimes barely so) saclike structures, sometimes with a long ventral stigmatic crest. Interpretation of winteraceous carpels, particularly those of Tasmannia (synonym Drimys sect Tasmannia) piperita, has been critical to both ontogenetic and phylogenetic theories regarding general carpel development.
openaire   +1 more source

Anther and Ovule Development in Tasmannia (Winteraceae)

Australian Journal of Botany, 1992
Three species of Tasmannia R.Br. ex DC., T. glaucifolia, T. insipida and T. stipitata are studied. The anther is tetrasporangiate and its waU development conforms to the Basic type. The tapetum follows the secretory type of development. Cytokinesis in the microspore mother cells is simultaneous but an evanescent cell plate is present at telophase I and
N Prakash, AL Lim, FB Sampson
openaire   +1 more source

Pharmacological and toxicological studies of Drimys angustifolia Miers. (Winteraceae)

Journal of Ethnopharmacology, 2007
Drimys angustifolia Miers. (Winteraceae) is a Brazilian medicinal plant used as analgesic, antiulcer and anti-inflammatory without studies to assure its efficacy and safety Leaf and stem bark extracts were evaluated to determine the antiulcer, analgesic, antiinflammatory and antioxidant activities.
Witaicenis, A., Roldao, E. F., Seito, L. N., Rocha, N. P., Di Stasi, L. C.   +4 more
openaire   +3 more sources