A new species of the genus Acerophagus Smith (Hymenoptera: Encyrtidae), A. belenaguirreae sp. n., is described from Vieques Island, Puerto Rico (USA) as a primary parasitoid mealybug Hypogeococcus (Hemiptera: Pseudococcidae) on Achyranthesaspera var. aspera (Amaranthaceae) and Portulaca (Portulacaceae). An identification key to females in New World with dark cross bands gastral dorsum provided....

Four populations of Pfaffia tuberosa, the Brazilian ginseng, collected in the central region of the state of Rio Grande do Sul (Brazil) were cytologically analyzed for meiotic behavior. All were tetraploid (2n = 4x = 68) and this condition could be observed through multiple chromosome pairing in pachytene and quadrivalent formation at diakinesis. Irregular chromosome segregation in both divisio...

In this study, the pollen morphology of allergic Dysphania botrys (L.) Mosyakin & Clemants (Amaranthaceae) taxon, which has a natural distribution within borders Eskişehir province, was investigated in terms and properties. Pollen grains D. are periporatae sphaeroidal shaped. As result microscopic examinations, A/B=1.06 μm (W), A (polar axis): 4.08 µm; B (Equatorial measured at 25.04 μm. Th...

BACKGROUND AND AIMS In spite of recent phylogenetic analyses for the Chenopodiaceae-Amaranthaceae complex, some morphological characters are not unambiguously interpreted, which raises homology questions. Therefore, ontogenetic investigations, emphasizing on 'bracteoles' in Atripliceae and flowers in Chenopodioideae, were conducted. This first paper presents original ontogenetic observations in...

Folate deficiency is a prevalent phenomenon worldwide especially in underprivileged countries. Polyglutamyl 5-methyltetrahydrofolate (5MTHF) species are the naturally occurring principle folate in store-bought vegetables. Here we report a simple and complete extraction method for the determination of native polyglutamyl 5-methyltetrahydrofolate in vegetables using high performance liquid chroma...