Physiological, isozyme changes and image analysis of popcorn seeds submitted to low temperatures

Catão, Hugo César Rodrigues Moreira; Caixeta, Franciele

doi:10.1590/2317-1545v39n3169853

Cited by 4 publications

(10 citation statements)

References 20 publications

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“…The supply of national popcorn cultivars is insufficient, mostly due to the inexistence of hybrids and varieties adapted to the soil and environment existent in Brazil, which augments the importation of seeds (Catão and Caixeta, 2017). However, popcorn kernel production is a growing business and an advantageous income source due to the value added to the product.…”

Section: Introductionmentioning

confidence: 99%

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Physiological quality of popcorn seeds assessed by the accelerated aging test

et al. 2018

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Despite the insufficient internal supply of popcorn kernel cultivars, the Brazilian production is continuously increasing. Therefore, searching for tests that offer fast results and reliable information on the physiological potential of the seeds is very important. The objective of this study was to assess the efficiency of the accelerated aging test, by using different times and exposure temperatures, for the evaluation of the physiological quality of popcorn seed lots. Popcorn seeds from three lots of the hybrid AP 8203 were used. For the initial characterization of the lots, the following tests were conducted: seed moisture content, first and final germination count, and field emergence. The accelerated aging test was performed in a 3x4x2 factorial scheme. After aging, the seeds were tested for moisture content, germination, and electrical conductivity. The experiment was carried out in a completely randomized design. The characteristic vigor was affected during aging, as evidenced by the increase in the amount of leachate detected by the electrical conductivity test. Seed lot 3 was most vigorous in the aging test conducted for 48 h at 45 °C. The accelerated aging test at 42 ºC for 48 h provides consistent information to differentiate seed lots of popcorn.

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Section: Introductionmentioning

confidence: 99%

“…However, popcorn kernel production is a growing business and an advantageous income source due to the value added to the product. This expansion is a consequence, at least partially, of the selection, development, and adaptation of foreign cultivars to the climate conditions of the country (Catão and Caixeta, 2017).…”

Section: Introductionmentioning

confidence: 99%

Physiological quality of popcorn seeds assessed by the accelerated aging test

et al. 2018

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“…The availability of popcorn (Zea mays L. everta) hybrids in Brazil is scarce. This necessitates the importation of significant volumes of seeds Caixeta, 2017). However, the production is increasing, and it represents an advantageous income source due to the benefit of the product (Rocha et al, 2018;Kavan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images

Catão

Caixeta

Lopes³

et al. 2020

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Salinity influences all germination stages and may adversely affect seedling establishment in the field. The objective of this research was to determine the relationship between the antioxidant activity and the physiological performance of seeds and to verify the efficacy of the imaging analysis of popcorn seedlings after seed exposure to saline stress. A completely randomized design was used that consisted of four replicates in a factorial scheme. This scheme comprised three popcorn hybrids (P618, AP6002, and AP8203) and five saline potential levels (0.0; -0.1; -0.3; -0.6, and -0.9 MPa) that were obtained from KCl solutions of different concentrations. First count germination, germination and seedling vigor classification (strong normal seedlings), and dry mass of seedlings were evaluated to determine the physiological quality of the seed. The images of seedlings were used to evaluate the coleoptile and root lengths, indices of vigor, uniformity, and growth using the Groundeye® software. The activities of the antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) were also determined. Saline stress compromises the physiological quality and antioxidant activity of seeds and the performance of popcorn seedlings. Computerized image analysis using Groundeye® was efficient in evaluating the popcorn seedlings after being subjected to salt stress. Hybrids AP6002 and AP8203 were more tolerant to salt stress than hybrid P618.

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“…The offer of Brazilian hybrids of popcorn (Zea mays L. everta) with high yield and adaptation to edaphic and climatic conditions is small, which leads to importation of a large number of popcorn seeds (Catão and Caixeta, 2017). However, popcorn production is growing and is an advantageous source of income due to added value of the product (Rocha et al, 2018;Kavan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…However, popcorn production is growing and is an advantageous source of income due to added value of the product (Rocha et al, 2018;Kavan et al, 2019). This growth is due, in part, to the selection, development, and adaptation of imported cultivars for the climate conditions of Brazil (Catão and Caixeta, 2017).…”

Section: Introductionmentioning

confidence: 99%

Potassium leaching test in evaluation of popcorn seed vigor

et al. 2019

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The search for tests that offer fast and reliable information on the physiological potential of seeds is of fundamental importance for quality control programs. The aim of this study was to evaluate the efficiency of the potassium leaching test in identification of different vigor levels of popcorn seed lots. Five seed lots of the hybrids AP8203 and AP4512 were tested for moisture content, and physiological quality was evaluated by tests of germination, first count of germination, and seedling emergence in the field. These results were compared to variations in the potassium leaching test (temperatures of 25 °C and 30 °C, volumes of 50 mL and 75 mL of water, fifty and one hundred seeds, and periods of 0.5 h, 1 h, 1.5 h, 2 h, 2.5 h, 3 h, 4 h and 5 h). Results showed that the potassium leaching test is efficient in separating the popcorn seed lots regarding physiological potential, and the most adequate conditions for this test are the use of fifty seeds with 50 mL of water for two hours at 30 ºC.

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Physiological, isozyme changes and image analysis of popcorn seeds submitted to low temperatures

Cited by 4 publications

References 20 publications

Physiological quality of popcorn seeds assessed by the accelerated aging test

Physiological quality of popcorn seeds assessed by the accelerated aging test

Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images

Potassium leaching test in evaluation of popcorn seed vigor

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