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| Machado,Marília Pereira; Silva,André Luís Lopes da; Biasi,Luiz Antonio; Deschamps,Cícero; Bespalhok Filho,João Carlos; Zanette,Flávio. |
| In the present study, the effects of two CaCl2.2H2O levels (440 and 1320 mg L-1) and two subcultures were evaluated on in vitro shoots of Lavandula angustifolia cv. Provence Blue. Ca2+ content of the apical, middle and basal portion of shoots was determined. Increasing CaCl2.2H2O level in the culture medium increased tissue Ca2+ content and decreased hyperhydricity. Shoot-tip necrosis also decreased with 1320 mg L-1 CaCl2.2H2O, but it did not occur in the second subculture. The middle and basal portion had higher Ca2+ content than apical portion. In non-hyperhydric tissues, there were smaller and more juxtaposed cells. Scanning electron microscopy of the leaves demonstrated that trichomes from in vitro leaf surface occurred in smaller quantities. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: True lavender Micropropagation CaCl2.2H2O; Leaf anatomy Ultrastructure Trichome. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500636 |
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| Verissimo,Mario Alvaro Aloisio; Azeredo,Amaro Afonso Campos de; Silva,Sergio Delmar dos Anjos e; Brasileiro,Bruno Portela; Bespalhok Filho,João Carlos; Daros,Edelclaiton; Oliveira,Ricardo Augusto de. |
| ABSTRACT: The purpose of this study was to select cold-tolerant sugarcane families and clones. Evaluations were carried out during three selection phases in the municipality of Pelotas, state of Rio Grande do Sul, Brazil. The experiments were arranged in an incomplete block design, with initially 4,452 seedlings of 53 full-sib families. Aside from the traits soluble solids content (BRX), tons of stalks per hectare (TSH) and tons of brixper hectare (TBH), the survival of the apical bud (ABS) was evaluated in the first selection stage (T1) of the breeding program. At the end of three selection phases, 15 clones of 14 of the 53 families evaluated in the first phase (T1) were selected for the experimental phase. Of these, the clones RS/PR126066, RS/PR126044,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Abiotic stress; Plant breeding; Frost.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100152 |
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| Acunha,Jefferson Gonçalves; Oliveira,Ricardo Augusto de; Zeviani,Walmes Marques; Peternelli,Luiz Alexandre; Bespalhok Filho,João Carlos; Daros,Edelclaiton. |
| Para a avaliação de experimentos com cana-de-açúcar, tem-se recomendado a colheita total de parcelas, algo que, devido aos seus custos, tem se mostrado inexequível. Alternativamente, pode-se estimar a produção com base na tomada de amostras que representem as parcelas. O objetivo deste trabalho foi estudar a suficiência amostral em cana-de-açúcar para a estimação da massa dos colmos de parcelas experimentais. Reamostragens com reposição subsidiaram o uso dos modelos da curva potencial, linear e quadrático segmentados com resposta platô e do modelo do coeficiente de variação relativo. Também foram realizados estudos simulados de análise de variância. Os resultados indicaram que amostras de 20 colmos coletados aleatoriamente na parcela experimental permitem... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tamanho da amostra; Suficiência amostral; Melhoramento da cana-de-açúcar; Saccharum spp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001747 |
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| Gavazza,Melícia Ingredi Araújo; Bassoi,Manoel Carlos; Carvalho,Tereza Cristina de; Bespalhok Filho,João Carlos; Panobianco,Maristela. |
| The objective of this work was to test methods for pre-harvest sprouting assessment in wheat cultivars. Fourteen wheat cultivars were grown in Londrina and Ponta Grossa municipalities, Paraná state, Brazil. They were sampled at 10 and 17 days after physiological maturity and evaluated using the methods of germination by rainfall simulation (in a greenhouse), in-ear grain sprouting, and grains removed from the ears. The in-ear grain sprouting method allowed the differentiation of cultivars, but showed different resistance levels from the available description of cultivars. The sprouting of grain removed from the ears did not allow a reliable distinction of data on germination in any harvest date or location. The method of rainfall simulation is the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Dormancy; Grain quality; Rainfall simulation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000700008 |
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| Caieiro,Juliana Terezinha; Panobianco,Maristela; Bespalhok Filho,João Carlos; Ohlson,Osvaldo de Castro. |
| Plant breeding is generally done through sexual reproduction even when the species is propagated asexually for commercial exploitation, as for example, in sugarcane. Therefore, the development of procedures to evaluate sugarcane seed viability is important for plant breeding programs. The objective of this research was to develop a methodology for analyzing the viability of sugarcane seeds (Saccharum spp.). Three crosses were used, two biparental crosses and one polycross. For the germination test study, two substrates (paper and sand) and three constant incubation temperatures (25 ºC, 30 ºC and 35 ºC), in the presence of constant light and also an alternating temperatures (20-30 ºC), with 8 hours light (30 ºC) and 16 hours darkness (20 ºC), were studied.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Substrate; Temperature; Plant breeding. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000200017 |
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