Departamento de Agroecologia e Agropecuária, Campus II, Universidade Estadual da Paraíba, Sítio Imbaúba s⁄no, 58117-000, Lagoa Seca, Paraíba, Brasil.
Departamento de Fitotecnia de Ciências Ambientais, Campus II, Universidade Federal da Paraíba, 58397-000, Areia, Paraíba, Brasil.
Sci Rep. 2020 Jan 31;10(1):1599. doi: 10.1038/s41598-020-58321-y.
High seed production makes Sporobolus indicus var. pyramidalis a difficult to control invasive grassland plant. The objective of the present study was to investigate the bioactivity of Cyperus rotundus, Phyllanthus tenellus and Ricinus communis green leaf extracts and of Carica papaya seeds on S. indicus germination without breaking dormancy, simulating the field conditions. The ethanolic extract bioactivity of C. rotundus, P. tenellus, R. communis green leaves and C. papaya seeds, at concentrations of 25, 50 and 75% in S. indicus germination was evaluated. Carotenoids, flavonoids, soluble phenolic compounds and total tannins were quantified in the extracts. The chemical component concentrations varied between alcoholic extracts. The P. tenellus extracts at all dilutions and those of R. communis and C. papaya at 75% completely suppressed S. indicus seed germination at five and ten days which can be attributed to their high tannin concentration, total phenolic compounds and flavonoids.
高种子产量使圆锥状须芒草成为一种难以控制的入侵草原植物。本研究的目的是研究香附、叶下珠和蓖麻鲜叶提取物和番木瓜籽对无需打破休眠模拟田间条件下的圆锥状须芒草种子萌发的生物活性。在浓度为 25%、50%和 75%的情况下，评估了香附、叶下珠、蓖麻鲜叶和番木瓜籽的乙醇提取物对圆锥状须芒草种子萌发的生物活性。对提取物中的类胡萝卜素、类黄酮、可溶性酚类化合物和总单宁进行了定量分析。不同浓度的酒精提取物之间的化学成分浓度存在差异。在所有稀释度下，叶下珠提取物以及 75%浓度的蓖麻和番木瓜提取物完全抑制了圆锥状须芒草种子在第五天和第十天的萌发，这归因于它们高浓度的单宁、总酚类化合物和类黄酮。
