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Bioactivity of Scytonema hofmanni (Cyanobacteria) in Lilium alexandrae in vitro propagation Electron. J. Biotechnol.
Zaccaro,María Cristina; Kato,Adriana; Zulpa,Gloria; Storni,Mónica Magdalena; Steyerthal,Noemí; Lobasso,Karina; Stella,Ana María.
Cyanobacteria produces bioactive compounds including plant growth regulators. Naphthalene acetic acid (NAA), a toxic substance, is a synthetic plant regulator used in micropropagation. The aim of this work was to evaluate morphogenetic and antioxidant effects produced by intra and extracellular substances from Scytonema hofmanni (Cyanobacteria) during the multiplication in vitro of Lilium alexandrae and to compare them to those produced by NAA. Intra and extracellular cyanobacterial products increased a) bulblets production reaching 83% and 78% of NAA effect, respectively; b) the bulblet diameter compared to NAA; and c) the bulblet survival due to the promotion of antioxidant activity measured as catalase, ascorbate peroxidase, and glutathione reductase...
Tipo: Journal article Palavras-chave: Ascorbate peroxidase; Bioactive substances; Bulb regeneration; Catalase; Cyanobacteria; Glutathione reductase; Lilium alexandrae; Scytonema hofmanni.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300007
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Bioactive compounds content of chimarrão infusions related to the moisture of yerba maté (Ilex Paraguariensis) leaves BABT
Bastos,Deborah H. M.; Fornari,Ana Claudia; Queiroz,Yara S.; Torres,Elizabeth A. F. S..
The aim of this study was to evaluate the effects of the processing stages of yerba maté (Ilex paraguariensis) on the moisture content of the leaves and the efficiency of the aqueous extraction of some bioactive substances. Samples of yerba maté were analyzed for caffeine, phenolic acids (caffeic acid, 5-caffeoilquinic acid) and flavonoids (quercetin, kaempferol and myricetin) by HPLC equipped with a diode array detector. Processing widely influenced the caffeine and 5-caffeoilquinic acid content of the aqueous extract (p < 0.05), which was related to the moisture content of the leaves. Caffeic acid was present in 45% of the in infusions from dried mate leaves. Quercetin, myricetin and kaempferol were not detected.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Yerba maté (Ilex paraguariensis); Processing; Bioactive substances.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400007
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