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Growth Regulators and KNO3 on Seed Germination of Angelonia salicariifolia

dc.contributor.authorPinto, A. C. R. [UNESP]
dc.contributor.authorRodrigues, T. J. D. [UNESP]
dc.contributor.authorLeite, I. C. [UNESP]
dc.contributor.authorBarbosa, J. C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:33:11Z
dc.date.available2014-05-20T15:33:11Z
dc.date.issued2009-01-01
dc.description.abstractAngelonia salicariifolia is an herbaceous perennial native to Brazil with ornamental potential as garden plant, cut-flower and potted plant. It has blue flowers 1.0 to 1.4 cm long, in 10-30 cm long terminal racemes. In previous studies seeds of A. salicariifolia showed a positive photoblastic behavior under constant temperatures of 10, 15, 20, 25, 30 and 35 degrees C. The present study evaluated the effects of growth regulators (100, 200, 300, 400, 500 mg L-1 of gibberellic acid and 2.25, 11.3, 22.5 mg L-1 of 6-benzylamino-purine) and potassium nitrate (0.2 and 1.0 %) on promoting its seed germination. The experiment was conducted in a completely randomized design with six replications of 25 seeds, for each treatment. Seeds from dehiscent capsules were sown on one layer of filter paper and moistened with growth regulators or KNO3 solutions. Germination was carried out at 25 degrees C +/- 1 degrees C, under continuous light or darkness. Germination (protusion of the radicle) was observed daily for 20 days. In the dark, only gibberellic acid promoted seed germination. The percentage of germination and the speed of germination index at 400 mg L-1 (47.3%; 0.86) and 500 mg L-1 (52.0%; 0.95) were significantly higher compared to 100 mg L-1 (27.8%; 0.38) and 200 mg L-1 (32.3%; 0.49). The mean germination time at 500 mg L-1 (10.0 days) was significantly smaller compared to 100 mg L-1 (11.9 days) and 200 mg L-1 (11.5 days). Under light, treatments did not differ among each other or from the control, except for 22.5 mg L-1 of 6-benzylamino-purine and potassium nitrate (1.0%), which decreased the percentage of germination and the speed of germination index compared to control. The application of growth regulators or potassium nitrate under light condition is not necessary, since these treatments did not improve germination percentage or the speed of germination index.en
dc.description.affiliationUniv Estadual Paulista UNESP, Fac Ciencias Agr & Vet, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista UNESP, Fac Ciencias Agr & Vet, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent453-457
dc.identifierhttp://www.actahort.org/books/813/813_59.htm
dc.identifier.citationVi International Symposium on New Floricultural Crops. Leuven 1: Int Soc Horticultural Science, v. 813, p. 453-457, 2009.
dc.identifier.issn0567-7572
dc.identifier.urihttp://hdl.handle.net/11449/41891
dc.identifier.wosWOS:000305391600059
dc.language.isoeng
dc.publisherInt Soc Horticultural Science
dc.relation.ispartofVi International Symposium on New Floricultural Crops
dc.relation.ispartofsjr0,198
dc.rights.accessRightsAcesso abertopt
dc.sourceWeb of Science
dc.subjectpropagationen
dc.subjectgibberellinen
dc.subjectcytokininen
dc.subjectScrophulariaceaeen
dc.titleGrowth Regulators and KNO3 on Seed Germination of Angelonia salicariifoliaen
dc.typeTrabalho apresentado em eventopt
dcterms.licensehttp://www.ishs.org/authors
dcterms.rightsHolderInt Soc Horticultural Science
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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