Fatores Que Afetam a Expressão Sexual Em Plantas De Pepino

Menezes, Nilson Lemos de

doi:10.1590/s0103-84781994000100042

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Nitrogen, besides favoring vegetative growth and leaf size, also plays a key role in the expression of female flowers. Nitrogen fertilization, especially with the use of nitrate, induces an increase in the number of female flowers on the plant (Menezes, 1994). According to Amer et al (2009) Figure 3B).…”

Section: Resultsmentioning

confidence: 96%

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Andrean¹,

Salim²,

Hachmann³

et al. 2017

Afr. J. Agric. Res.

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This study aimed to evaluate the effect of different doses of nitrogen and potassium applied through fertirrigation on yield characteristics of Italian Zucchini, Novita Plus cultivar. The experiment was conducted in a greenhouse at the Irrigation Technical Center of the State University of Maringá, Maringá -PR, adopting a completely randomized design in a 4 x 4 factorial scheme, with three replications. Four doses of nitrogen (0, 90, 180 and 270 kg ha . Number of leaves, number of male and female flowers, average yield and mass of fruits per plant were evaluated. There was an increase in leaf production at the maximum nitrogen dose, as well as an increase in the number of male flowers at the maximum dose of nitrogen and potassium. The number of female flowers was influenced only by nitrogen, with an increase in the number of flowers at the highest nitrogen levels. Regarding the fruit yield, the best obtained doses were 179.19 kg ha -1 of N and 171.25 kg ha -1 of K 2 O. Finally, the doses that expressed maximum fruit mass gain were 136.92 kg ha -1 of N and 184.17 kg ha -1 of K 2 O.

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Section: Resultsmentioning

confidence: 96%

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Andrean¹,

Salim²,

Hachmann³

et al. 2017

Afr. J. Agric. Res.

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“…Essa resposta mostra a influência das giberilinas no estímulo da frutificação (KOHLI et al, 1981). É sabido que as condições ambientais afetam o balanço hormonal (MENEZES, 1994), entre os quais os níveis de giberilinas, que promovem altas taxas de frutos partenocárpicos (TOFANELLI et al, 2003) e podem reduzir a viabilidade de pólen e a fertilidade de óvulos (THOMAS, 1995).…”

Section: Influência De áCido Giberélico (Ga 3 ) Na Eficiência De Cruzunclassified

Métodos de avaliação de pólen e influência do ácido giberélico em cruzamentos de batata

et al. 2008

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RESUMOObjetivou-se neste trabalho comparar métodos de avaliação da qualidade de pólen e avaliar a influência do ácido giberélico (GA 3 ), na eficiência de cruzamento de genótipos de batata (Solanum tuberosum L.). Ambos os estudos foram conduzidos na sede da Embrapa Clima Temperado, Pelotas-RS. O primeiro estudo foi conduzido no Laboratório de Melhoramento Genético, na primavera de 2003 e outono-inverno de 2004. Foram avaliados os métodos do carmin propiônico e da fertilidade do pólen, com dois meios de ágar, açúcar e boro (meio 1 e meio 2), utilizando cinco genótipos de batata. O segundo estudo foi realizado em casa-de-vegetação, no outono-inverno de 2004. Uma solução de 25mg.L -1 de GA 3 foi pulverizada em 15 genótipos de batata, que são utilizados como genitores no programa de melhoramento. Conclui-se que ambos os meios de cultura podem ser utilizados na avaliação da qualidade do pólen de batata, e a influência do GA 3 na eficiência de cruzamento é dependente do genótipo.Termos para indexação: Solanum tuberosum, sementes verdadeiras de batata, regulador de crescimento. ABSTRACTThe aims of this work were to compare evaluation methods of pollen quality and to evaluate the influence of giberellic acid (GA 3 ) on the efficiency of crossing potato (Solanum tuberosum L.) genotypes. Both studies were carried out at Embrapa Clima Temperado headquarters, Pelotas-RS. The first study was accomplished in the Plant Breeding Laboratory, in the spring of 2003 and autumn-winter of 2004. The carmin propionic and the pollen fertility of two agar, sugar and boro media (culture medium 1 and culture medium 2) were evaluated, using five potato genotypes. The second study was carried out at greenhouse, in the autumn-winter of 2004. A GA 3 solution of 25mg.L -1 was sprayed on 15 potato genotypes that are used as genitors in the breeding program. One concluded that both growing media can be used for potato pollen quality evaluation, and the influences of GA 3 on the crossing efficiency is dependent of the genotype.

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“…The crop production is directly related to female flowering, which are controlled by genetic factors and also by external factors, with temperature and photoperiod as the main ones. (Menezes, 1994).…”

Section: Introductionmentioning

confidence: 99%

Production of cucumber cultivars according to the accumulated thermal sum

Diel

Lúcio²,

Tartaglia³

et al. 2022

Com. Sci.

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Cucumber is a species appreciated in cooking, in addition to providing various nutrients for health. In view of this, it is important that research on its growth is carried out, prioritizing statistical analyzes that effectively demonstrate the results. The objective was to verify the differences by analyzing of the variance and nonlinear models, in addition to characterizing the production, early production and production rate of cultivars of cucumber using of nonlinear models. An experiment was carried out in a randomized block design (RBD), with three cultivars (‘Atlantico’, ‘Caipira’ and ‘Fuyu’) in six replications. Two types of analysis of variance were performed for the variable mass of cucumber fruits. In the first the RBD design was considered with three cultivars and six replications and in the second the RBD design was considered in a split subdivided over time (cultivars x harvests). Afterwards, the Logistic growth model was adjusted for the fruit mass variable as a function of accumulated thermal sum, and determination of the critical points of the model. The use of nonlinear models to evaluate experiments with cultures of multiple harvests has advantages in relation to anova and complementary tests. The cultivar ‘Fuyu’, has higher productivity compared to the cultivars ‘Atlantico’ and ‘Caipira’, in addition to presenting greater precocity and production rate. The adjustment of the logistic model and its critical points allowed to identify the production, precocity and production rate of the evaluated cultivars of the cucumber.

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Fatores Que Afetam a Expressão Sexual Em Plantas De Pepino

Cited by 5 publications

References 7 publications

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Métodos de avaliação de pólen e influência do ácido giberélico em cruzamentos de batata

Production of cucumber cultivars according to the accumulated thermal sum

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