Resposta à vernalização de cultivares brasileiras de trigo

Alberto, Cleber Maus; Streck, Nereu Augusto; Walter, Lidiane Cristine; Rosa, Hamilton Telles; Brackmann, Auri; Oliveira, Felipe Brendler; Zanon, Alencar Júnior; Fagundes, Lovane Klein

doi:10.1590/s0006-87052009000200029

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…En el caso de los lirios, que también deben ser vernalizados para florecer (Streck y Schuh, 2005), las bajas temperaturas deben ser aplicadas a los bulbos (Lee et al, 1996). La respuesta de las plantas a la vernalización está determinada por la temperatura y por la duración de las bajas temperaturas (Alberto et al, 2009;Streck y Schuh, 2005). Streck y Schuh (2005) afirman que plantas de lirio provenientes de bulbos sometidos a vernalización tuvieron una emergencia más rápida y uniforme, una disminución del ciclo de cultivo con una floración más precoz, comparadas con aquellas plantas que emergieron de bulbos no vernalizados.…”

Section: Introductionunclassified

La temperatura de vernalización en bulbos reutilizados de lirio (Lilium sp.) afecta la distribución de materia seca y la producción de flor

Auzaque-Rodríguez¹,

Balaguera-López²,

Álvarez-Herrera³

et al. 2012

Rev. Colomb. Cienc. Hortic.

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La temperatura de vernalización en bulbos reutilizados de lirio (Lilium sp.) afecta la distribución de materia seca y la producción de flor RESUMENEl lirio se propaga comercialmente mediante bulbos. Para los programas de siembra en Colombia, los bulbos deben ser importados, pero tienen un alto costo, lo cual reduce la rentabilidad del cultivo. No obstante, mediante la vernalización de los bulbos que quedan después del corte de la flor es posible obtener nuevas cosechas. Por tanto, el objetivo fue evaluar el efecto de diferentes temperaturas de vernalización en bulbos reutilizados de lirio del híbrido asiático Castello sobre la distribución de materia seca y calidad de la flor. Se utilizó un diseño completamente al azar con cuatro tratamientos correspondientes a tres temperaturas de vernalización (-2°C, 3°C y 14ºC) y un testigo comercial (bulbos importados), cada tratamiento tuvo tres repeticiones. Los bulbos fueron almacenados durante 8 semanas a las temperaturas mencionadas y luego fueron sembrados en campo. El testigo comercial generó mayor masa seca de flores, tallo, bulbo y total, y mejor calidad de flor, con la vernalización a -2°C y 3°C se obtuvo una moderada masa seca de flores, tallo y total pero baja en bulbos, se presentó alta floración y buena calidad de flor de lirio, mientras que con 14°C no se presentó una removilización adecuada de las reservas del bulbo, lo que afectó negativamente el crecimiento y la floración. La vernalización de bulbos reutilizados de lirio es una práctica que potencialmente podría reemplazar la importación de bulbos, pero necesita más investigación para aumentar su eficiencia. ABSTRACTLily is propagated commercially with bulbs. For planting programs in Colombia, these bulbs must be imported, but this is an expensive procedure, which reduces profitability. However, through vernalization of bulbs that remain after cutting the flower, it is possible to obtain a new crop cycle. Therefore, the objective was to evaluate the effect of different temperatures in the vernalization of reutilized lily bulbs of the Asian hybrid Castello on the distribution of dry matter and flower quality. A completely randomized design was used with four treatments for three vernalization temperatures (-2°C, 3°C y 14ºC) and a commercial control (imported bulbs), each treatment had three replications. The bulbs were stored for 8 weeks at the above-mentioned temperatures and then planted in the field. The commercial control produced greater dry mass for: flowers, stem, bulb and total; and better quality of flowers. With vernalization at -2°C and 3°C, a moderate dry mass for flowers, stems and bulbs was obtained, but with a low total dry mass; whereas lilies at these low temperatures bloomed abundantly and presented good quality flowers. At 14°C, no adequate remobilization of reserves of the bulbs took place, which negatively affected growth and flowering. Vernalization of reutilized lily bulbs is a practice that potentially could replace bulb imports, but more research needs to increase its efficiency.

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Section: Introductionunclassified

La temperatura de vernalización en bulbos reutilizados de lirio (Lilium sp.) afecta la distribución de materia seca y la producción de flor

Auzaque-Rodríguez¹,

Balaguera-López²,

Álvarez-Herrera³

et al. 2012

Rev. Colomb. Cienc. Hortic.

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“…Similarly, Alberto et al [32] investigated the BRS Louro cultivar and reported no variation in the SOW-ANT cycle duration as a function of vernalization. In our study, vernalization reduced the duration of the SOW-TS phase in the BRS Tarumã and BRS 277 cultivars, shortening the total cycle, although not changing the duration of the TS-ANT phase, as was also verified by Alberto et al [32], who detected sensitivity of this cultivar to vernalization. These results reinforce the hypothesis of the existence of genetic variability of cultivars to vernalization.…”

Section: Discussionmentioning

confidence: 95%

Influence of Vernalization and Photoperiod on the Duration of Stem Elongation and Spikelet Fertility in Wheat

Rodrigues¹,

Teixeira²,

Costenaro³

et al. 2014

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A longer stem elongation phase (from the terminal spikelet-TS to the anthesis-ANT phases) increases grain production due to an increase in spikelet fertility. However, the mechanism behind the greater number of fertile flowers that occur when the duration of stem elongation is modified by photoperiod and vernalization is not fully understood. The goal of this study was to investigate the effect of combinations of photoperiod and vernalization on the duration of stem elongation and spikelet fertility in wheat. Thus, a greenhouse experiment was performed by subjecting 13 wheat genotypes to two vernalization regimes (V0-non-vernalized plants and V40-plants with 40 vernalization days) and to two photoperiod regimes (NP-natural and NP + 6-photoperiod extended by six hours), during the stem elongation phase. The natural photoperiod increased the spikelet fertility of eight cultivars without a corresponding increased duration of the TS-ANT phase, suggesting the existence of a direct effect of photoperiod on increased spikelet fertility. Vernalization increased the duration of the TS-ANT phase, without influencing spikelet fertility. There was genetic variability in the responses to photoperiod and vernalization.

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“…De acordo com Alberto et al (2009a), a cultivar BRS Louro não é sensível à vernalização, e assim quando exposta a temperatura e fotoperíodo elevados, como acontecem nas semeaduras durante a primavera e o ciclo acontece durante o verão, esta cultivar apresentou os menores valores de NFF.…”

Section: Resultsunclassified

“…Já a cultivar BRS Tarumã é muito sensível à vernalização (ALBERTO et al, 2009a(ALBERTO et al, , 2009b, e, portanto apresentou uma resposta típica de trigo de inverno (STRECK et al, 2003a(STRECK et al, ,2003b, com os maiores valores do NFF nas semeaduras de primavera e verão quando as plantas não foram expostas a temperaturas vernalizantes durante a estação de crescimento. As plantas de trigo apresentaram valores intermediários de NFF nas semeaduras de outono, quando o seu ciclo de desenvolvimento ocorreu durante o período recomendado para a cultura.…”

Section: Resultsunclassified

Número de folhas associado com duplo anel e espigueta terminal em cultivares de trigo

et al. 2012

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RESUMO -O objetivo deste trabalho foi determinar o número de folhas, representado pelo Estágio de Haun, no duplo anel e na espigueta terminal de cultivares de trigo com diferentes ciclos de desenvolvimento e cultivados em diferentes datas de semeadura. Um experimento de campo foi realizado em Santa Maria, RS, com 13 datas de semeadura ao longo de três anos (2005; 2006 e 2007). Foram utilizados seis genótipos de trigo com ciclos de desenvolvimento variando de precoce a tardio: BRS Louro, CEP 52, BRS 177, CEP 51, Nova Era e BRS Tarumã. O delineamento experimental utilizado foi blocos completos casualizados, com seis tratamentos (cultivares) e quatro repetições. Foram determinados os estágios início do perfilhamento, duplo anel (DA), espigueta terminal (ET) e o número final de folhas no colmo principal (NFF) e na data em que ocorreu o DA e a ET foi quantificado o número de folhas totalmente expandidas mais a fração decimal do comprimento da lâmina foliar da última folha (em expansão) em relação à penúltima folha (expandida), com os quais foi calculado o Estágio de Haun (HS). Os resultados indicam que o número de folhas no colmo principal, representado pelo HS, no duplo anel (HS DA ) e na espigueta terminal (HS ET ) em trigo, varia com a cultivar (grupo de maturação) e com a data de semeadura. Práticas de manejo como a adubação nitrogenada e a aplicação de herbicidas hormonais podem ser melhoradas usando-se o HS DA e HS ET ao invés do início do perfilhamento e elongação do colmo, respectivamente. Palavras-chave:Trigo-adubação nitrogenada. Semeadura. Herbicidas. ABSTRACT -The objective of this study was to determine the number of leaves, represented by the Haun stage, in the double ridge and terminal spikelet of wheat cultivars with different development cycles and grown on different sowing dates. A field experiment was conducted in Santa Maria, RS with 13 sowing dates over three years (2005, 2006 and 2007). Six wheat genotypes were used with development cycles ranging from early to late: BRS Louro, CEP 52, BRS 177, CEP 51, Nova Era and BRS Tarumã. The experimental design used was of randomized complete blocks, with six treatments (cultivars) and four repetitions. The early stages of tillering, double-ridging (DA), terminal spikelet (ET) and the final number of leaves on the main stem (NFF) were determined, and on the date of DA and ET, the number of fully expanded leaves was quantified together with the decimal fraction of the length of the leaf blade of the last leaf (unfolded) in relation to the penultimate leaf (unfolding), with which the Haun Stage (HS) was calculated. The results indicate that the number of leaves on the main stem, represented by HS, in the double ridge (HS DA ) and in the terminal spikelet (HS ET ) in wheat, varies with the cultivar (maturity group) and the date of sowing. Management practices such as fertilization with nitrogen and the application of hormonal herbicides can be improved by using the HS DA and HS ET, instead of the onset of tillering and stem elongation, respectively.

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Resposta à vernalização de cultivares brasileiras de trigo

Cited by 7 publications

References 21 publications

La temperatura de vernalización en bulbos reutilizados de lirio (Lilium sp.) afecta la distribución de materia seca y la producción de flor

La temperatura de vernalización en bulbos reutilizados de lirio (Lilium sp.) afecta la distribución de materia seca y la producción de flor

Influence of Vernalization and Photoperiod on the Duration of Stem Elongation and Spikelet Fertility in Wheat

Número de folhas associado com duplo anel e espigueta terminal em cultivares de trigo

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