Phytotoxicity of organic extracts of Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. in cucumber seeds

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorSilvestre, Daniel Moreto
dc.creatorKolb, Rosana Marta
dc.creatorFrei, Fernando
dc.creatorSantos, Catarina dos
dc.date2014-05-27T11:29:53Z
dc.date2016-10-25T18:50:46Z
dc.date2014-05-27T11:29:53Z
dc.date2016-10-25T18:50:46Z
dc.date2013-07-01
dc.date.accessioned2017-04-06T02:29:41Z
dc.date.available2017-04-06T02:29:41Z
dc.identifierActa Botanica Brasilica, v. 27, n. 3, p. 476-482, 2013.
dc.identifier0102-3306
dc.identifier1677-941X
dc.identifierhttp://hdl.handle.net/11449/75840
dc.identifierhttp://acervodigital.unesp.br/handle/11449/75840
dc.identifier10.1590/S0102-33062013000300003
dc.identifierS0102-33062013000300003
dc.identifierWOS:000328078100003
dc.identifier2-s2.0-84883751921.pdf
dc.identifier2-s2.0-84883751921
dc.identifier0000-0003-3841-5597
dc.identifierhttp://dx.doi.org/10.1590/S0102-33062013000300003
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/896571
dc.descriptionWe evaluated the phytotoxic effects that the hexane, ethyl acetate and methanol extracts from leaves and branches of the species Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. (Turneraceae), at concentrations of 1.25, 2.50, 3.75 and 5.00 mg ml-1, have on seed germination and seedling development in cucumber (Cucumis sativus L.). None of the extracts tested prevented germination, although the ethyl acetate extracts of T. diffusa, at 3.75 and 5.00 mg ml-1, reduced the mean germination speed and time to germination. Hexane extracts of both species reduced the main root length, number of secondary roots and hypocotyl length. In the ethyl acetate and methanol extracts, the number of secondary roots and hypocotyl length varied by species and concentration. Ethyl acetate extracts of T. ulmifolia at ≤ 2.50 mg ml-1stimulated growth of the main root and hypocotyl, as did T. ulmifolia methanol extracts at 1.25 and 3.75 mg ml-1; all other extract/concentration combinations had an inhibitory effect on those parameters. The hexane and ethyl acetate extracts of T. diffusa inhibited the formation of secondary roots and of the main root, although significant inhibition of hypocotyl growth was observed only at ≥ 2.50 mg ml-1. Comparatively, T. diffusa extracts inhibited development to a greater degree, thus presenting greater allelopathic potential, than did T. ulmifolia extracts.
dc.languageeng
dc.relationActa Botanica Brasilica
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAllelopathy
dc.subjectCucumis sativus
dc.subjectDevelopment
dc.subjectGermination
dc.titlePhytotoxicity of organic extracts of Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. in cucumber seeds
dc.typeOtro


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