Plants can plastically respond to light competition in three strategies, comprising vertical growth, which promotes competitive dominance; shade tolerance, which maximises performance under shade; or lateral growth, which offers avoidance of competition. Here, we test the hypothesis that plants can 'choose' between these responses, according to their abilities to competitively overcome their neighbours. We study this hypothesis in the clonal plant Potentilla reptans using an experimental setup that simulates both the height and density of neighbours, thus presenting plants with different light-competition scenarios. Potentilla reptans ramets exhibit the highest vertical growth under simulated short-dense neighbours, highest specific leaf area (leaf area/dry mass) under tall-dense neighbours, and tend to increase total stolon length under tall-sparse neighbours. These responses suggest shifts between 'confrontational' vertical growth, shade tolerance and lateral-avoidance, respectively, and provide evidence that plants adopt one of several alternative plastic responses in a way that optimally corresponds to prevailing light-competition scenarios.
The antiurease activity of the aqueous extracts of 42 plants growing in the Czech Republic was investigated. A phenol-hypochlorite reaction was used for the determination of ammonia produced by urease. The inhibitory activity of the extracts at a concentration of 0.2 mg/mL varied from 17.8% to 80.0%. Extracts from six Potentilla species expressed inhibitory activity against jack bean urease. They were further investigated for their phenolic constituents and the major compounds were subjected to molecular docking. The results revealed that both jack bean urease and Helicobacter pylori urease were inhibited by quercetin-3-O-β-D-galactopyranoside-6″-gallate (1), myricetin-3-O-β-D-glucuronide (2), tiliroside (3) and B-type procyanidin (4). The antiurease activity of the investigated Potentilla species is probably due to the presence of complex phenolic constituents such as flavonoid glycosides and catechin dimers.
- MeSH
- algoritmy MeSH
- Canavalia enzymologie MeSH
- fenoly chemie izolace a purifikace farmakologie MeSH
- flavonoidy chemie izolace a purifikace farmakologie MeSH
- galaktosidy chemie izolace a purifikace farmakologie MeSH
- Helicobacter pylori účinky léků MeSH
- infekce vyvolané Helicobacter pylori farmakoterapie MeSH
- léčivé rostliny chemie MeSH
- Potentilla chemie MeSH
- quercetin analogy a deriváty MeSH
- ureasa antagonisté a inhibitory MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
- Klíčová slova
- mochna bílá, pitulník,
- MeSH
- fytoterapie MeSH
- hluchavkovité MeSH
- komplementární terapie metody MeSH
- léčivé rostliny MeSH
- Potentilla MeSH
- Publikační typ
- populární práce MeSH
- MeSH
- Agrimonia chemie klasifikace MeSH
- krvácení dásní diagnóza komplikace prevence a kontrola MeSH
- léčivé přípravky zubní aplikace a dávkování klasifikace terapeutické užití MeSH
- léčivé rostliny účinky léků MeSH
- lidé MeSH
- nemoci dásní farmakoterapie komplikace prevence a kontrola MeSH
- nemoci parodontu farmakoterapie komplikace prevence a kontrola MeSH
- orální hygiena metody trendy využití MeSH
- Potentilla chemie klasifikace MeSH
- ústní sliznice účinky léků MeSH
- Check Tag
- lidé MeSH
- MeSH
- Agrimonia účinky léků MeSH
- farmaceutický průmysl MeSH
- Foeniculum účinky léků MeSH
- fytoterapie * metody využití MeSH
- léčivé rostliny * klasifikace MeSH
- lidé MeSH
- máta peprná účinky léků MeSH
- Matricaria účinky léků MeSH
- orální hygiena metody využití MeSH
- Potentilla účinky léků MeSH
- rostlinné extrakty terapeutické užití MeSH
- šalvěj lékařská účinky léků MeSH
- stomatologická péče * metody ošetřování MeSH
- Syzygium účinky léků MeSH
- ústní a čelistní systém MeSH
- Check Tag
- lidé MeSH
