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Application of low concentrations of salicilyc acid increases the number of flowers in Petunia hibrida Agrociencia
Martín-Mex,Rodolfo; Vergara-Yoisura,Silvia; Nexticapán-Garcés,Ángel; Larqué-Saavedra,Alfonso.
The effect of applications of low concentrations of salicylic acid (SA) on the number of flowers and the date of flower initiation in Petunia (Petunia híbrida) in reported in this paper. Concentrations of 1 μM to lpM of SA were spread on three occasions to the shoot of plantlets cultivated in greenhouse conditions. Analysis of the results showed that all the concentrations of SA tested increased the number of open flowers per plant. Concentrations as low as lpM or 0.lnM induced positive riesponses by 33 % and 37 %, as compared with that of the control. The highest concentration of 1 μM increased not only the number of flowers by 72 % but also induced early flowering by six days.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flowering; Low concentrations; Petunia; Salicylic acid.
Ano: 2010 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000700004
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Can the reproductive system of a rare and narrowly endemic plant species explain its high genetic diversity? Acta Botanica
Rodrigues,Daniele M.; Turchetto,Caroline; Callegari-Jacques,Sidia M.; Freitas,Loreta B..
ABSTRACT The reproductive system of flowering plants can be highly variable, affecting their biology, gene flow and genetic variability among populations. Petunia secreta is a rare annual endemic species of Pedra do Segredo, located in the municipality of Caçapava do Sul, state of Rio Grande do Sul, Brazil. Although rare, the species possesses a high level of genetic variability. We investigated the reproductive system of P. secreta, including fruit production and seed germinability, in order to determine if its reproductive system can explain its genetic diversity. We sampled five populations and conducted five greenhouse hand-pollination treatments: 1) autonomous apomixis; 2) self-pollination; 3) hand self-pollination; 4) geitonogamy; and 5)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endogamy; Pampas; Petunia; Reproductive success; Reproductive system; Seed germinability.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200180
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Leaf Structure and Taxonomy of Petunia and Calibrachoa (Solanaceae) BABT
Reis,Claudia dos; Sajo,Maria das Graças; Stehmann,João Renato.
We studied the leaf anatomy of sixteen species of Calibrachoa and eight species of Petunia. In Calibrachoa leaves, the vascular bundles sheath (endodermis) was formed by parenchymatous developed cells, different from those of the mesophyll. In Petunia, this sheath did not show a marked morphological differentiation. The Calibrachoa leaves could be separated according to the type of leaf margins, the distribution of the stomata on leaf surfaces, the organization of the mesophyll and the morphology of the trichomes. Based on these results, an indented dichotomous identification key was elaborated for the species of the genus Calibrachoa.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanaceae; Calibrachoa; Petunia; Leaf anatomy; Taxonomy.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100010
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Morphological and genetic perspectives of hybridization in two contact zones of closely related species of Petunia (Solanaceae) in southern Brazil Acta Botanica
Teixeira,Marcelo C.; Turchetto,Caroline; Hartke,Sara; Schnitzler,Carolina K.; Freitas,Loreta B..
ABSTRACT Interspecific hybridization has several consequences for parental species, from blurring species limits to the emergence of new taxa. Petunia axillaris and P. exserta occur in sympatry in southernmost Brazil and naturally hybridize despite their different pollination syndromes and habitat requirements. We employed genetic and morphological analyses to characterize two contact zones between the species with the aim of determining the effect of interspecific hybridization. Microsatellite loci and a morphometric evaluation of the corolla shape were used to classify individuals based on their origin as pure parental or hybrids. Corolla color was used to classify individuals a priori (white, red or intermediate, for P. axillaris, P. exserta or hybrid,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genetic diversity; Hybridization; Introgression; Morphometric analysis; Petunia.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400734
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New records of Petunia (Solanaceae) for the Argentinean flora Darwiniana
Ando,Toshio; Soto,Silvina; Suárez,Enrique.
Petunia interior and P. guarapuavensis are reported for the first time for the Argentinean flora, and their geographical distributions are updated.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Misiones; Petunia; Solanaceae; Argentina; Brazil.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932005000100007
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Species boundary and extensive hybridization and introgression in Petunia Acta Botanica
Turchetto,Caroline; Schnitzler,Carolina K.; Freitas,Loreta B..
ABSTRACT Studying the role of hybridization in the speciation of plants is one of the most thrilling areas of evolutionary biology. Hybridization in natural populations can act in opposition to divergence, contribute to adaptation through introgression or foster the emergence of new lineages via hybrid speciation. Species of the plant genus Petunia grow in open areas in southern South America. Some natural interspecific hybrid events have been described for the genus, such as between the endemic P. exserta and the widespread P. axillaris. Both species occur in sympatry in Serra do Sudeste (Brazil), where they occur in diverse habitats and exhibit floral divergence, which has been related to the attraction of different primary pollinators. The present study...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gene exchange; Hybridization; Inbreeding; Introgression; Microsatellite; Petunia; Species limits.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400724
Registros recuperados: 6
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