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Reaktywne formy tlenu (ROS) pełnią w nasionach podwójną funkcję, są zarówno cząsteczkami sygnałowymi determinującymi kolejne etapy fizjologii nasion, jak też związkami toksycznymi, wywołującymi nieodwracalne zmiany strukturalne prowadzące do starzenia nasion. Zmiany stężenia ROS, szczególnie w osi zarodkowej, decydują o tym czy nasiona pozostaną w stanie spoczynku, czy też rozpocznie się proces kiełkowania,...
This paper presents principles of sorghum (Sorghum spp.) allelopathy and its importance in agro- ecosystems. Sorghum is cereal grain plant of the family Poaceae and one of the most important crops in the world. Sorghum produces a large variety of secondary metabolites that determine its high allelopathic potential. Most of them are classified as hydrophilic phenolic compounds. Mature root hairs of...
Autotoxicity is a type of intraspecific allelopathy (autoallelopathy), caused through the release into the environment compounds, which belong to secondary metabolites. Autotoxicity is observed in natural environment and in agroecosystems. It causes both, beneficial and negative effects. Autoallelopathy allows plants to survive by avoiding intra-competition. On the other hand, it is a serious economical...
Summary Allelopathy denotes biochemical interactions among all types of plants and microorganisms. Allelochemicals occur in the majority of secondary plant products and belong to terpenoids, phenolic compounds, phenylpropane derivatives, flavonoids, organic cyanides, long-chain fatty acids. In fields, allelopathy involves a complex of compounds, which complicates investigations of underlying mechanisms...
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