Geum urbanum (Rosaceae), a New Naturalized Species for Connecticut

Rhodora ◽  
10.3119/19-07 ◽  
2020 ◽  
Vol 122 (989) ◽  
pp. 37
Author(s):  
John P. Anderson ◽  
William H. Moorhead
Keyword(s):  
Geum Urbanum

scholarly journals Insight into the Secondary Metabolites of Geum urbanum L. and Geum rivale L. Seeds (Rosaceae)

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1219
Author(s):  
Marek Bunse ◽  
Peter Lorenz ◽  
Florian C. Stintzing ◽  
Dietmar R. Kammerer
Keyword(s):  
Fatty Acids ◽  
Phenolic Compounds ◽  
Unsaturated Fatty Acids ◽  
Asiatic Acid ◽  
Cosmetic Products ◽  
Nutritional Properties ◽  
First Time ◽  
Derivatives Of ◽  
Geum Urbanum ◽  
Insight Into

The present study aimed at the identification and quantitation of phenolic compounds, fatty acids, and further characteristic substances in the seeds of Geum urbanum L. and Geum rivale L. For this purpose, individual components of extracts recovered with MeOH, CH2Cl2, and by cold-pressing, respectively, were characterized by HPLC-DAD/ESI-MSn and GC/MS and compared with reference compounds. For both Geum species, phenolic compounds, such as flavonoids and gallic acid derivatives, and triterpenes, such as saponins and their aglycones, were detected. Surprisingly, both Geum species revealed the presence of derivatives of the triterpenoid aglycons asiatic acid and madecassic acid, which were characterized for the first time in the genus Geum. Furthermore, the fatty acids of both species were characterized by GC–MS after derivatization. Both species showed a promising fatty-acid profile in terms of nutritional properties because of high proportions of unsaturated fatty acids. Linoleic acid and linolenic acid were most abundant, among other compounds such as palmitic acid and stearic acid. In summary, the present study demonstrates the seeds of G. urbanum and G. rivale to be a valuable source of unsaturated fatty acids and bioactive phenolics, which might be exploited for nutritional and cosmetic products and for phytotherapeutic purposes.

scholarly journals Antimicrobial and antioxidant potential of different solvent extracts of the medicinal plant Geum urbanum L.

2017 ◽  
Vol 11 (1) ◽  
Author(s):  
Lyudmila Dimitrova ◽  
Maya M. Zaharieva ◽  
Milena Popova ◽  
Nedelina Kostadinova ◽  
Iva Tsvetkova ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
Antioxidant Potential ◽  
Geum Urbanum

scholarly journals Redox-modulation, Suppression of “Oncogenic” Superoxide and Induction of Apoptosis in Burkitt’s Lymphoma Cells Using Geum urbanum L. Extracts

2021 ◽  
Vol 25 (4) ◽  
pp. 315-330
Author(s):  
Milka Mileva ◽  
◽  
Lyudmila Dimitrova ◽  
Milena Popova ◽  
Vassya Bankova ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Burkitt’S Lymphoma ◽  
Burkitt's Lymphoma ◽  
Leaf Extracts ◽  
Lymphoma Cells ◽  
Barr Virus ◽  
Induction Of Apoptosis ◽  
Epstein Barr ◽  
Apoptotic Activity ◽  
Geum Urbanum

Burkitt’s lymphoma is a highly aggressive type of non-Hodgkin’s lymphoma, linked to the Epstein-Barr virus, which induces oxidative stress and DNA damage in the infected cells. We investigated the cytotoxicity and redox-modulating ability of ethyl acetate (EtOAc) and n-butanol (n-BuOH) extracts from Geum urbanum L. roots and aerial parts on Burkitt`s lymphoma cells (BLC), to elucidate their impact on oxidative stress and cell survival. BLC Raji was treated with EtOAc and n-BuOH extracts to analyze: cell viability; induction of apoptosis; hydroperoxides and reactive nitrogen species (RNS) by 2’,7’-dichlorodihydrofluorescein assay; superoxide by dihydroethidium assay; total antioxidant capacity by TAC assay. All extracts suppressed cell growth and induce apoptosis. n-BuOH extracts possessed higher cytotoxicity and pro-apoptotic activity compared to EtOAc. The fractions decreased the hydroperoxides and RNS levels. There was no correlation between the DCF fluorescence in the treated cells and their viability (R = -0.3722; p > 0.05). Root extracts decreased the superoxide level, while the leaf extracts did not. There was a good correlation between the dihydroethidium fluorescence in the treated cells and their viability (R = 0.9843; p < 0.01). All extracts increased the TAC of BLC. G. urbanum extracts serve as redox-modulators and anti-inflammatory compounds, decreasing the intracellular level of “oncogenic” superoxide and cell proliferation.

scholarly journals Conservation of Non-Pest Whiteflies and Natural Enemies of the Cabbage Whitefly Aleyrodes proletella on Perennial Plants for Use in Non-Crop Habitats

Insects ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 774
Author(s):  
Sebastian Laurenz ◽  
Rainer Meyhöfer
Keyword(s):  
Natural Enemies ◽  
Control Strategies ◽  
Conservation Biological Control ◽  
Future Research ◽  
Economic Damage ◽  
Naturally Occurring ◽  
Brassica Crops ◽  
Aleyrodes Proletella ◽  
Local Abundance ◽  
Geum Urbanum

Aleyrodes proletella causes severe economic damage to several Brassica crops. Its naturally occurring enemies often immigrate late in the season or appear in low numbers on cabbage. This field study aims to permanently increase the local abundance of A. proletella’s natural enemies by providing the non-pest whitefly Aleyrodes lonicerae as an alternative and overwintering host/prey. Therefore, the population dynamics of natural enemies on different perennial herbaceous plants pre-infested with A. lonicerae were determined at two field locations over two winter periods. Most A. lonicerae colonized (on average 166.22 puparia per m²) and overwintered (342.19 adults per m²) on wood avens Geum urbanum. Furthermore, the abundance of A. proletella main parasitoid Encarsia tricolor (28.50 parasitized puparia per m²) and spiders (12.13 per m²) was 3–74 times and 3–14 times higher, respectively, on G. urbanum compared to the other experimental plants. Conclusively, G. urbanum pre-infested with A. lonicerae permanently promoted natural enemies of A. proletella by serving as shelter, reproduction, and overwintering habitat. A potential implementation of G. urbanum in conservation biological control strategies (e.g., tailored flower strips, hedgerows) against A. proletella are discussed and suggestions for future research are given.

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