Search results for "CRUCIFERAE"
showing 7 items of 7 documents
Brassica tardarae (Brassicaceae), a New Species from a Noteworthy Biotope of South-Western Sicily (Italy)
2020
A new species of Brassica sect. Brassica is described here from Sicily (Italy), which is known to be one of the centers of the diversification of wild taxa of this group. The new species (named Brassica tardarae) is restricted to the carbonate cliffs in the Tardara Gorges between Menfi and Sambuca di Sicilia (Agrigento province), an area with a peculiar geological history and where another strictly endemic species was recently described. The morphological relationships between the new species and other similar taxa are discussed, and an analytical key to the Sicilian taxa belonging to the genus Brassica sect. Brassica is also provided.
Mārtiņa Lapiņa fotografētais Aleksandra Zāmeļa portrets
2022
Godinot latviešu botāniķi un ģenētiķi Aleksandru Zāmeli 125 gadu jubilejā par mēneša priekšmetu Latvijas Universitātes Muzejs ir izvēlējies A. Zāmeļa portretu, ko fotografējis viens no 20. gadsimta pirmās puses izcilākajiem fotogrāfiem Mārtiņš Lapiņš. Raksts veltīts šai fotogrāfijai.
Recatalogación de Vella lucentina M.B. Crespo (Cruciferae) según las categorías UICN (2001)
2006
Vella lucentina es un endemismo del centro de la provincia de Alicante que habita en matorrales esteparios calcícolas, bajo bioclima termomediterráneo semiárido. Su fragmentada área de ocupación apenas alcanza tres kilómetros cuadrados y se encuentra sometida a una fuerte presión antrópica, por lo que hasta el momento se tiene como especie “vulnerable” (VU), según las categorías de amenaza de la UICN. Sin embargo, últimamente se ha constatado una merma en la calidad de su hábitat y la desaparición de algunos núcleos poblacionales secundarios, a causa a actividades urbanísticas que amenazan a las restantes poblaciones. Los trabajos que se vienen realizando en los últimos meses sobre la biolo…
Typification of names inDrabasect.Aizopsis(Cruciferae, Arabideae) based on material from Italy
2013
Names of 20 presumed taxa in Draba sect. Aizopsis, all based on material from Italy, are considered. Full synonymies are provided, and types are designated (for 14 names) or indicated. Most of the taxa are currently considered unworthy of recognition, of which 16 belong to D. aspera sensu lato. However, the question of whether the Sicilian populations might be distinct from the peninsular populations is still unsettled.
Effect of incorporation of Brassica napus L. residues in soils on mycorrhizal fungus colonisation of roots and phosphorus uptake by maize (Zea mays L…
2007
International audience; Plants in the Brassicaceae family are known to contain thioglucoside compounds that produce isothiocyanates when tissues are disrupted. These chemicals have a negative effect on soil-borne fungal pathogens, and possibly on vesicular-arbuscular mycorrhizal (AM) fungi. We investigated the effect of incorporation of Brassica napus L. residues in a soil on mycorrhizal colonisation of roots, P uptake and growth of following maize (Zea mays L.) crop. A pot experiment was carried out in a glasshouse with pre-inoculation with Glomus intraradices (+I and -I), incorporation of B. napus L. residues (+R and -R) and mineral P fertilization (+P and -P) as studied factors. The soil…
Tocopherol, fatty acid and phytosterol content in seeds of nine wild taxa of Sicilian Brassica (Cruciferae)
2010
The purpose of this study was to determine tocopherol (Toc), fatty acid and phytosterol content in dry seeds of nine wild taxa of Sicilian Brassica sect. Brassica. Analyses were performed by gas chromatography (GC)-mass spectroscopy (MS). The biochemical analysis of dry seeds showed that in the nine taxa examined, α - and γ -Toc were the major isomers, δ - Toc was present in traces and β -Toc was never found. All taxa had a similar fatty acid composition with C 16:0 (357.2 mg kg − 1 DW), C 18:1 (393.94 mg kg − 1 DW) and C 22:1 (618.29 mg kg − 1 DW) acids present in higher amount. Unsaturated fatty acids (52.5–66.5%) were more abundant than saturated (33.5–47.5%) ones relative to the total f…
Ģinšu un sugu krustošanas mēģinājumi krustziežu dzimtā (Cruciferae)
2020
Raksts satur informāciju par latviešu botāniķa Aleksandra Zāmeļa (1897 - 1943) doktora disertāciju "Ģinšu un sugu krustošanas mēģinājumi krustziežu dzimtā (Cruciferae)" (1942), kas glabājas Latvijas Universitātes Muzeja Botānikas un mikoloģijas kolekciju krājumā.