Teste de comprimento de plântula na avaliação da qualidade fisiológica de sementes de Amburana cearensis (Allemão) A.C. Smith

Guedes, Roberta Sales; Alves, Edna Ursulino; Santos-Moura, Sueli da Silva; Galindo, Évio Alves

doi:10.5433/1679-0359.2015v36n4p2373

Cited by 21 publications

(23 citation statements)

References 7 publications

(10 reference statements)

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“…The commercial witness, despite being widely cultivated in the northern and northeastern regions of the country, did not present the same behavior and performance of the other genotypes. The high vigor of the seeds accelerated the metabolic processes, thus providing an accelerated and uniform germination Guedes et al [15]. Regarding the change in time, the temperatures measured in the field presented a quadratic response (p ≤ 0.05) (Fig.…”

Section: Resultsmentioning

confidence: 87%

“…The total length of the seedling and its parts were obtained from the division of the sum of the measurements performed in the sub samples by the number of normal seedlings obtained and the results expressed in centimeters, with two decimal places [14]. The test was performed in a germinator regulated at 25°C and with the absence of light [15]. After five days in the Germinator, the normal seedling count and measurement were performed.…”

Section: Methodsmentioning

confidence: 99%

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Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Barbosa

Aguiar

Siebeneichler

et al. 2019

IJPSS

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The purpose of this study was to evaluate the response of germination and vigor in maize seeds in laboratory conditions, exposure to high temperatures, in order to highlight the most adaptable genotypes at these temperatures. Were supplied three cultivars of the PIONEIRA LTDA. (PIONEIRA HS-9, PIONEIRA HS-14i, PIONEIRA ROBUSTO), to perform the experiment, in addition to the commercial cultivar BRS 3040. After the selection of superior genotypes, were performed at temperatures of 25 reviews, 30, 35 and 40ºC, these being: germination, first count, seedling dry mass and speed index of the emergence of seedlings. At the temperature of 25°C were made the cold test and seedling length, shoot and root axis. The results were submitted to analysis of variance, comparison of averages by Tukey test, to three genotypes and regression analysis to high school, to three genotypes and the witness commercial. Whereas the maximum temperature of 35°C tested, one could observe that the PIONEIRA HS-6 genotype presented the best adaptation to high temperatures. The PIONEIRA ROBUSTO genotype was more adapted to high temperatures whereas as the highest temperature of 40°C. The BRS 3040 was not adapted to the high temperatures in relation to genotypes produced under conditions of high temperatures of the Cerrado.

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Section: Resultsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Barbosa

Aguiar

Siebeneichler

et al. 2019

IJPSS

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show abstract

“…These tests are not simply complementary to the germination test, but protagonistic, in light of their speed and effectiveness, especially the seedling length test (Sena et al, 2015). The test of primary root length of A. cearensis seedlings was recommended over other vigor tests for evaluation of physiological quality due to its sensitivity for classification in vigor levels (Guedes et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Vigor test of (strong) normal intact Amburana cearensis (Allemão) A.C. Smith seedlings

et al. 2020

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The aim of this study was to adapt the vigor test methodology of (strong) normal intact seedlings of Amburana cearensis and evaluate efficiency in physiological classification of seed lots. The study was conducted in two stages: morphological characterization of seedlings and physiological analysis of seed lots. To do so, the following tests were carried out: (strong) normal seedlings, germination, emergence, first count, germination speed index, tetrazolium, length of strong normal seedlings, length and dry mass of seedlings. The experimental design was completely randomized. The Tukey and Kruskal-Wallis tests were used to compare the results, and the correlation between the variables was analyzed by Spearman and Pearson coefficients. The seedlings of A. cearensis are semi-hypogeal phanerocotylar, with development of normal seedlings on the ninth day after sowing. The vigor test of strong normal seedlings, length of strong normal seedlings, dry matter, and tetrazolium led to physiological classification into different vigor levels. The vigor test of (strong) normal seedlings, the length of strong normal seedlings, and tetrazolium (vigor) were effective for vigor classification of A. cearensis seeds.

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“…A higher emergence speed may reflect in higher initial seedling growth rates, as well as higher growth rates during the crop cycle, since the seedlings can go through photosynthetic processes that allow a greater growth, in relation to other seedlings with lower emergence speed index values. This is due to the fact that, when the seed presents a superior emergence speed index, the seedling develops its roots and shoots faster, allowing a greater use of the natural resources and, consequently, a better development of the plant physiological processes (Guedes et al 2015).…”

Section: Resultsmentioning

confidence: 99%

Methods for overcoming dormancy in teak diaspores1

Soares

Leite

Júnior

et al. 2017

Pesqui. Agropecu. Trop.

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Teak has one of the most valuable woods in the world. However, one of the main limitations to produce seedlings of this species is related to its slow and irregular germination. This study aimed to evaluate methods for overcoming dormancy in teak diaspores, as well as their influence on seedling quality. The experimental design was completely randomized, with six treatments and four replications, totaling 24 experimental units. The evaluated treatments were: control; immersion in water for 12 h and sun exposure for 12 h, a process that was repeated three times; mechanical scarification for 5 seconds, using an electric emery; oven treatment at 80 ºC, for 6 h; impact test on diaspores at the heights of 10 cm and 20 cm. The following parameters were evaluated: emergence percentage at 29 days after sowing; percentage of normal seedlings; emergence speed index; emergence relative frequency; seedling fresh and dry weight and seedling length. The use of oven heating at 80 ºC, for 6 h, is the most efficient method to overcome dormancy in teak diaspores. The methods used did not affect the seedlings quality.

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Teste de comprimento de plântula na avaliação da qualidade fisiológica de sementes de Amburana cearensis (Allemão) A.C. Smith

Cited by 21 publications

References 7 publications

Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Germination under High Temperatures of Maize Adapted to the Cerrado of Tocantins

Vigor test of (strong) normal intact Amburana cearensis (Allemão) A.C. Smith seedlings

Methods for overcoming dormancy in teak diaspores1

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