Search results for "ACEA"
showing 10 items of 2814 documents
The pollination syndrome ofDeplanchea tetraphylla (Bignoniaceae)
1986
The reproductive structures ofDeplanchea tetraphylla (Bignoniaceae) exhibit a significant number of unusual features: inflorescence with an apical “platform”; flowers yellow, short-tubed, strongly zygomorphic; mouth closed through lateral compression; stamens and style long-exserted, erect or slightly reclined; nectar dark brown, exposed in the spoon-shaped lowermost corolla lobe and apparently acting also as a visual cue. These features suggest a highly elaborate syndrome for bird pollination: the birds (probably lorikeets) perch on the inflorescence platform and bend downwards to take up the exposed nectar, thus touching the exserted anthers and stigmas with the throat or breast. The like…
Floral synorganization and its influence on mechanical isolation and autogamy in Marantaceae
2012
The flowers of Marantaceae (∼ 550 species) exhibit a highly derived pollination mechanism within Zingiberales, with a rapid and irreversible style movement based on a close synorganization of different floral parts. Given the complexity of the structure, we assume that little variation is possible if functionality is to be maintained. To test this, we investigated how much floral diversity exists in the clade and whether this diversity potentially influences the breeding system and placement of pollen on the pollinator. Flowers of 66 species covering the five major phylogenetic clades of the family were analysed. All species are similar in their basic flower construction: the fleshy stamino…
Prenylated benzopyran derivatives from two Polyalthia species
1996
Two new benzopyran derivatives, (6E,10E)-isopolycerasoidol and polycerasoidin methyl ester, have been isolated from a methanolic extract of the stem bark of Polyalthia cerasoides. Their structures were established on the basis of chemical and spectral evidence. Polyalthia sclerophylla contains (6E,10E)-isopolycerasoidol, besides the known polycerasoidin and polycerasoidol. In addition, a known phenylpropene derivative, trans-asarone, has also been isolated from both species and fully characterized.
Epitypification of Hagaea alsinifolia (Polyycarpon tetraphyllum subsp. Alsinifolium, Caryophyllaceae)
2018
As part of the ongoing studies on the genus Polycarpon Linnaeus (1759: 859, 881) (see e.g., Iamonico 2015a, 2015b, 2015c, Iamonico & Domina 2015), and on the Italian loci classici (see e.g., Peruzzi et al. 2015, Brundu et al. 2015, Domina et al. 2016, Di Gristina et al. 2017, Domina et al. 2017, 2018a, 2018b), we present here a note regarding Hagaea alsinifolia Bivona-Bernardi (1815: 7–8) [currently accepted (see Bartolucci et al. 2018) as Polycarpon tetraphyllum Linnaeus (1759: 881) subsp. alsinifolium (Biv.) Ball (1877: 370)].
A New Polyploid Species of the Genus Tragopogon (Asteraceae, Cichorieae) from Russia
2008
ABSTRACT Tragopogon soltisiorum Mavrodiev (Asteraceae, Cichorieae, Scorzonerinae) is described as a new species. The new species is a tetraploid (2n = 24), ruderal plant with long flowering and fruiting times and differs from the vast majority of Tragopogon L. species in its ability to reproduce vegetatively from adventitious shoots. The new species is known only from southern Russia and is found in two varieties—a typical variety and a new variety latifolius Mavrodiev.
Fruit Quality Traits of Two Apricot Cultivars
2010
In this trial we evaluated physical and chemical fruit quality traits and sensory profile of two late-ripening apricot cultivars ‘Vitillo’ and ‘Pellecchiella’. Fruits were harvested at full maturation in three different pickings, at 4 day intervals, to ensure the same fruit quality. To verify quality among different pickings, weight, diameter, soluble solid content, titratable acidity, pH, colour were recorded. To describe and quantify the sensory characteristics of apricot fruits a panel of 10 judges generated 16 descriptors. For each of these attributes judges assigned a score from 1 to 9. Qualitative and sensory data for each attribute were submitted to one way Analysis of Variance (ANOV…
Association of Marginal Leaf Scorch with Sodium Accumulation in Salt-stressed Peach
2000
The effect of specific ion toxicity during salt stress was tested in the present study. The experiment was repeated twice, in 1996 and 1998, with `Nemaguard' peach seedlings and rooted cuttings grown in hydroponics under two NaCl concentrations (50 and 30 mm). Foliage was separated in symptomatic and symptomless leaves and the amount of sodium (Na+) and chloride (C1–) was determined. Significantly higher Na+ content was found in symptomatic than in symptomless leaves in both experiments, whereas in only two of the six cases was Cl– content higher in symptomatic than in symptomless leaves. The Na+ threshold for leaf scorch was somewhere between 4 and 6 mg·g–1 dry weight. Results indicated th…
Lectotypification of the fountain grass Cenchrus setaceus (Poaceae: Paniceae)
2015
The typification of the name Cenchrus setaceus (Forsskål) Morrone (Poaceae) is discussed, and a lectotype is designated. Cenchrus setaceus is native to northeastern Africa, and cultivated as an ornamental plant in some parts of the world. It is an invasive species in a wide range of natural habitats worldwide, competing strongly with the native flora.
Phenolics of Reichardia and their taxonomic implications
1992
Abstract Fifteen compounds have been detected in Reichardia tingitana and R. picroides (nine flavonoids, four cinnamic derivatives and two unidentified non-phenolic compounds). The present study examines the taxonomic implications of these compounds in relation to the morphological and karyological characteristics.
Phenolic compounds in different olive varieties
2001
Phenolic compounds in different olive varieties were determined by HPLC analysis over 2 years. Demethyloleuropein was found in only two (Coratina and Leccino) of the eight varieties studied, so it could be used as varietal marker. Elenolic acid glucoside and hydroxytyrosol can be considered indicators of maturation for olives. In fact, as the olives ripen, their tenor increases whereas oleuropein decreases. Keywords: Phenolic compounds; olive fruit; oleuropein; demethyloleuropein; 3,4-dihydroxyphenylethanol; elenolic acid glucoside