Phytogrowth-inhibitory activities of a clerodane from Viguiera tucumanensis

Vaccarini, Clarisa E.; Palacios, Sara M.; Meragelman, Karina M.; Sosa, Virginia E.

doi:10.1016/s0031-9422(98)00518-4

Cited by 18 publications

(18 citation statements)

References 3 publications

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“…Despite the fact that kauranes have usually been found to be the major secondary metabolites in most Viguiera species, some studies demonstrated the presence of diterpenes with clerodane (Vaccarini et al, 1999;Meragelman et al, 1996), trachylobane (Da Costa et al, 1996a), labdane (Tamayo-Castillo et al, 1990), beyerane and other minor skeletons (Domingues et al, 1988). Ambrosio et al (2004a) described for the first time the occurrence of pimarane derivatives in a Brazilian Viguiera, i.e.…”

Section: Chemistry Of Brazilian Asteraceae: Isolation Of Bioactive Tementioning

confidence: 99%

Kaurane and pimarane-type diterpenes from the Viguiera species inhibit vascular smooth muscle contractility

et al. 2006

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Section: Chemistry Of Brazilian Asteraceae: Isolation Of Bioactive Tementioning

confidence: 99%

Kaurane and pimarane-type diterpenes from the Viguiera species inhibit vascular smooth muscle contractility

et al. 2006

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“…However, there are fewer reports concerning the phytotoxic properties of diterpenoids (Macías et al 1999(Macías et al , 2000. A clerodane diterpene, isolated from Viguiera tucumanensis, inhibited both germination and root growth of Sorghum halepense and Chenopodium album (Vaccarini et al 1999). A series of diterpenes, primarily ent-labdane derivatives from Potomageton natans and Ruppia maritime, have been found to have toxicity to a number of animals and the alga Selenastrum capricornornutum (DellaGreca et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Regulation of Cell Division and Growth in Roots of Lactuca sativa L. Seedlings by the Ent-Kaurene Diterpenoid Rabdosin B

et al. 2010

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Rabdosin B, an ent-kaurene diterpenoid purified from the air-dried aerial parts of Isodon japonica (Burm.f) Hara var. galaucocalyx (maxin) Hara, showed a biphasic, dose-dependent effect on root growth and a strong inhibitory effect on root hair development in lettuce seedlings (Lactuca sativa L.). Lower concentrations of rabdosin B (20-80 microM) significantly promoted root growth, but its higher levels at 120-200 microM, by contrast, had inhibitory effects. Additionally, all tested concentrations (10-40 microM) inhibited root hair development of seedlings in a dose-dependent manner. Further investigations on the underlying mechanism revealed that the promotion effect of rabdosin B at the lower concentrations resulted from increasing the cell length in the mature region and enhancing the mitotic activity of meristematic cells in seedlings' root tips. In contrast, rabdosin B at higher concentrations inhibited root growth by affecting both cell length in the mature region and division of meristematic cells. Comet assay and cell cycle analysis demonstrated that the decrease of mitotic activity of root meristematic cells was due to DNA damage induced cell cycle retardation of the G(2) phase and S phase at different times.

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“…A maioria dos trabalhos relata que os efeitos dos compostos alelopáticos se relacionam aos processos fisiológicos da planta receptora e de maneira geral, agem como inibidores da germinação e do crescimento (Juan Jiménez-Osornio et al 1996;Viles & Reese 1996;Rawat et al 1998;Vaccarini et al 1999). Porém, alguns trabalhos demonstraram que estes compostos podem atuar como promotores de crescimento (Yamada et al 1995;Yokotani-Tomita et al 1998).…”

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Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.

2004

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RESUMO -(Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.). O objetivo deste trabalho foi analisar os efeitos de extratos aquosos de diferentes órgãos de Aristolochia esperanzae na germinação e no crescimento de alface e rabanete. Todos os extratos preparados obedeceram à proporção de 100g de material vegetal fresco para 300mL de água destilada, que produziu o extrato considerado 100% concentrado. A partir deste, foram feitas diluições com água destilada para 75, 50 e 25%. Nos testes de germinação foram avaliados os efeitos dos extratos obtidos de folha, caule, raiz, fruto e flor a 100, 75, 50 e 25%. Para o teste de crescimento foram utilizados extratos de folha, caule e raiz na concentração de 100 e 50%. Nos testes de germinação foram utilizadas quatro repetições de 30 sementes distribuídas em placas de Petri forradas com duas folhas de papel de filtro umedecidas com 5 mL dos referidos extratos, secas durante 12h e reumedecidas com 4,5mL de água destilada. No primeiro teste avaliou-se a percentagem e a velocidade de germinação das sementes. No teste de crescimento, as sementes foram previamente germinadas (2-4mm de radícula) e depois transferidas para caixas plásticas contendo os substratos de papel de filtro e fibra de coco umedecidos com os respectivos extratos. Avaliou-se a altura da parte aérea, o comprimento radicular, a massa seca das plântulas e a presença de anormalidades nas plântulas. Os testes foram mantidos à temperatura constante de 27ºC. Através dos resultados obtidos pode-se concluir que os extratos de folha foram os que mais afetaram a percentagem de germinação e que todos os extratos e as diferentes concentrações retardaram a germinação de sementes de alface e de rabanete. Quanto ao teste de crescimento, podese verificar que os extratos de caule e de raiz causaram anormalidades nas plântulas. As plântulas crescidas no substrato papel de filtro apresentaram maior inibição do crescimento, em relação àquelas crescidas no substrato fibra de coco. A concentração dos extratos foi a principal responsável pelo estímulo ou inibição causada no crescimento das plântulas de alface e rabanete.Palvras-chave: alelopatia, Aristolochia, alface, rabanete ABSTRACT -(Allelopathic activity of aqueous extracts of Aristolochia esperanzae O. Kuntze in the germination and growth of Lactuca sativa L. and Raphanus sativus L.). This work analyzed the effects of aqueous extracts of Aristolochia esperanzae organs in the germination and initial growth of lettuce and radish. All the extracts were prepared using 100g of plant fresh material + 300mL of distilled water to produce the extract 100% concentrated. This extract was diluted with distilled water to produce a final concentrations of 75, 50 and 25%. The germination was evaluated by tests using the extracts of leaf, stem, root, fruit and flower, with concentration of 100, 75, 50, and 25%. In the seedlings growth, the extracts of leaf, stem, and root were used in the con...

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Phytogrowth-inhibitory activities of a clerodane from Viguiera tucumanensis

Cited by 18 publications

References 3 publications

Kaurane and pimarane-type diterpenes from the Viguiera species inhibit vascular smooth muscle contractility

Kaurane and pimarane-type diterpenes from the Viguiera species inhibit vascular smooth muscle contractility

Regulation of Cell Division and Growth in Roots of Lactuca sativa L. Seedlings by the Ent-Kaurene Diterpenoid Rabdosin B

Atividade alelopática de extratos aquosos de Aristolochia esperanzae O. Kuntze na germinação e no crescimento de Lactuca sativa L. e Raphanus sativus L.

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