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dc.contributor.authorRocha, S. F R [UNESP]
dc.contributor.authorScarda, F. M. [UNESP]
dc.date.accessioned2014-05-27T11:20:25Z
dc.date.available2014-05-27T11:20:25Z
dc.date.issued2002-02-27
dc.identifierhttp://www.actahort.org/books/569/569_4.htm
dc.identifier.citationActa Horticulturae, v. 569, p. 33-39.
dc.identifier.issn0567-7572
dc.identifier.urihttp://hdl.handle.net/11449/66827
dc.description.abstractOcimum gratissimum seed germination (% germination and vigor) has been found as phytochrome dependent, having a typical High Irradiant Response (HIR). Seven treatments were tested: daylight (DL), red (R), far-red (FR), blue (B), green (G), dark (DK), and reversible (RVB). No statistical difference among the DL, R, FR, B, and G were found. DK and RVB were statistically equal and presented the lowest results. The germination also occurred in the DK treatment but in non-useful rates, and it was nonreversible in the RVB treatment. It allows these seeds to be classified as positively photoblastic. The minimum energy need to initiate the germination was evaluated by a fluency-response curve. It plotted four different exposition times to R light (1 second, 60 seconds, 1 hour, and 13 hours) against percent germination. Useful germination occurred only after 1 hour, confirming the high energy needed to incite the process. The germination rate increased with the raise of the photoequilibrium (j). The high positive correlation index found confirms the phytochrome influence in this process. Facing all the results presented here, it is suggested to sow these seeds under direct and highly intense sunlight. It is preferable to avoid places exposed to variations in the shading, because inhibition induced by dense shade effects (low R/FR ration and consequently low j established) were demonstrated irreversible, and it can lead to undesirable loss of the germination power.en
dc.format.extent33-39
dc.language.isoeng
dc.relation.ispartofActa Horticulturae
dc.sourceScopus
dc.subjectEcophysiology
dc.subjectLight quality
dc.subjectMedicinal plants.
dc.subjectOcimum gratissimum
dc.subjectPhotoblasty
dc.subjectPhotoequilibrium
dc.subjectSeed germination
dc.titlePhytochrome and light influence on germination and vigor of ocimum gratissimum L. (Lamiaceae) seeds under high irradiance conditionsen
dc.typeTrabalho apresentado em evento
dcterms.licensehttp://www.ishs.org/authors
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationVegetal Production Department/Horticulture Section Agronomical Sciences College Universidade Estadual Paulista, Botucatu, São Paulo
dc.description.affiliationEcology Department Biosciences Institute Universidade Estadual Paulista, Rio-Claro, São Paulo
dc.description.affiliationUnespVegetal Production Department/Horticulture Section Agronomical Sciences College Universidade Estadual Paulista, Botucatu, São Paulo
dc.description.affiliationUnespEcology Department Biosciences Institute Universidade Estadual Paulista, Rio-Claro, São Paulo
dc.identifier.wosWOS:000176152700004
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-84879541673
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Rio Claropt
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências Agronômicas, Botucatupt
dc.relation.ispartofsjr0,198
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