UV-B radiation affects flavonoids and fungal colonisation in Fagopyrum esculentum and F. tataricum

作者：Regvar Marjana^*; Bukovnik Urska; Likar Matevz; Kreft Ivan

来源：Central European Journal of Biology, 2012, 7(2): 275-283.

DOI：10.2478/s11535-012-0017-4

• Buckwheat
• Fungal endophytes
• Quercetin
• Rutin
• UV-B

In the present study, we have evaluated the effects of increased UV-B radiation that simulates 17% ozone depletion, on fungal colonisation and concentrations of rutin, catechin and quercetin in common buckwheat (Fagopyrum esculentum) and tartary buckwheat (Fagopyrum tataricum). Induced root growth and reduced shoot: root ratios were seen in both of these buckwheat species after enhanced UV-B radiation. There was specific induction of shoot quercetin concentrations in UV-B-treated common buckwheat, whereas there were no specific responses for flavonoid metabolism in tartary buckwheat. Root colonisation with arbuscular mycorrhizal fungi significantly reduced catechin concentrations in common buckwheat roots, and induced rutin concentrations in tartary buckwheat, but did not affect shoot concentrations of the measured phenolics. Specific UV-B-related reductions in the density of microsclerotia were observed in tartary buckwheat, indicating a mechanism that potentially affects fungus-plant interactions. The data support the hypothesis that responses to enhanced UV-B radiation can be influenced by the plant pre-adaptation properties and related changes in flavonoid metabolism.

• 出版日期2012-4