Germination and growth inhibitory effects of Hypericum myrianthum and H. polyanthemum extracts on Lactuca sativa L

Germination and growth inhibitory effects of ethanolic crude extracts of Hypericum myrianthum and H. polyanthemum aerial parts on lettuce (Lactuca sativa) were investigated. The germination was retarded in all the tested concentrations. After seven days the final germination percentage of the most c...

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Published inRevista brasileira de farmacognosia Vol. 17; no. 1; pp. 44 - 48
Main Authors Fritz, Daniela, Bernardi, Ana Paula, Haas, Juliana S., Ascoli, Bruna M., Bordignon, Sérgio Augusto de Loreto, von Poser, Gilsane
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Farmacognosia 01.03.2007
Subjects
PHARMACOLOGY & PHARMACY
atividade alelopática
radicle length
germinação de sementes
allelopathic effects
Hypericum myrianthum
seed germination
Hypericum polyanthemum
Lactuca sativa
radícula
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Summary:Germination and growth inhibitory effects of ethanolic crude extracts of Hypericum myrianthum and H. polyanthemum aerial parts on lettuce (Lactuca sativa) were investigated. The germination was retarded in all the tested concentrations. After seven days the final germination percentage of the most concentrated extracts was significantly reduced by both extracts in comparison with the control. The radicles length was significantly affected showing necrosis. Both species present phenolic compounds as the main components and they could be responsible for the inhibition of the germination and growth of Lactuca sativa.
ISSN:0102-695X
1981-528X
DOI:10.1590/S0102-695X2007000100010