نتایج جستجو برای: rheum palmatum
تعداد نتایج: 2028 فیلتر نتایج به سال:
A new leaf spot disease was observed on leaves of Rheum palmatum (Chinese rhubarb) in Northwest China (Gansu Province) starting in 2005. A Septoria-like fungus was isolated and completion of Koch's postulates confirmed that the fungus was the casual agent of the leaf spot disease. Morphology and molecular methods were combined to identify the pathogen. The fungus produced conidiomata pycnidia a...
seven stilbenes and one catechin were bioactivity-guidedly isolated from the rhizomes of rheum palmatem. their structures were identified as piceatannol(1), resveratrol(2), piceid(3), rhapontigenin(4), piceatannol-3'-o-β-d-glucopyranoside(5), rhaponticin(6), catechin(7) and desoxyrhapontigenin(8). anti-monoamine oxidase (mao) activities of compounds 1–8 were tested. compounds 1 and 8 showe...
Chloroplast microsatellite primers were developed in order to provide more population genetic information of endangered Rheum officinale, R. palmatum, and R. tanguticum for conservation. The dried roots and rhizomes of these plants are important in traditional Chinese medicine. The results showed that the optimum concentrations of Mg(2+), Taq DNA polymerase, dNTPs, template DNA, and primers in ...
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