Refine
Year of publication
- 2016 (5) (remove)
Document Type
- Article (5)
Has Fulltext
- yes (5)
Is part of the Bibliography
- no (5)
Keywords
- agriculture (1)
- habitat destruction (1)
- herbarium (1)
- naturalization (1)
- plant diversity (1)
Institute
- Medizin (1)
Plant diversity change for cities and their surroundings is well documented. For rural areas such studies are difficult as literature data are mostly insufficient. We reconstructed phytodiversity change in the Feldatal community (Germany, Hesse) by comparison of historical herbarium collections (1945–1976, Hans Hupke) with a recent floristic survey (2012). The study area is a rural area typical for Central Europe, dominated by agriculture and forestry and with a stable human population. Floristic diversity decreased (683 to 497 species; 31% of the total flora), principally by disappearance of species of unimproved grassland, fields and villages. The small number of newly documented species (33 spp.; 5% of total flora) comprises mostly naturalized ornamentals and salt tolerant species along roads. Plant diversity change of the last decades in rural landscapes in Central Europe was mainly dependent on the intensification of agriculture.
Buchbesprechungen
(2016)
Es werden folgende Publikation rezensiert: Ackermann & Sachteleben: Identifizierung der Hotspots der Biologischen Vielfalt in Deutschland; Bellin-Harder: In der Schwebe. Vegetationsdynamik und Pflegeprognostik. Ein vegetationskundlicher Beitrag zur Gartendenkmalpflege am Beispiel der Löwenburg im Bergpark Wilhelmshöhe, Kassel; Düll & Kutzelnigg: Taschenlexikon der Pflanzen Deutschlands und angrenzender Länder. Die wichtigsten mitteleuropäischen Arten im Porträt; Nassauischer Verein für Naturkunde: Zwischen Mittelrhein und Taunus. Naturschätze in Lorch am Rhein; Parolly & Rohwer: Schmeil-Fitschen. Die Flora Deutschlands und der angrenzenden Länder; Pusch et al: Die Botaniker Thüringens.
Alterations in dendritic spine numbers are linked to deficits in learning and memory. While we previously revealed that postsynaptic plasticity-related gene 1 (PRG-1) controls lysophosphatidic acid (LPA) signaling at glutamatergic synapses via presynaptic LPA receptors, we now show that PRG-1 also affects spine density and synaptic plasticity in a cell-autonomous fashion via protein phosphatase 2A (PP2A)/β1-integrin activation. PRG-1 deficiency reduces spine numbers and β1-integrin activation, alters long-term potentiation (LTP), and impairs spatial memory. The intracellular PRG-1 C terminus interacts in an LPA-dependent fashion with PP2A, thus modulating its phosphatase activity at the postsynaptic density. This results in recruitment of adhesome components src, paxillin, and talin to lipid rafts and ultimately in activation of β1-integrins. Consistent with these findings, activation of PP2A with FTY720 rescues defects in spine density and LTP of PRG-1-deficient animals. These results disclose a mechanism by which bioactive lipid signaling via PRG-1 could affect synaptic plasticity and memory formation.