Efeitos de métodos de colheita e da localização dos frutos na planta sobre a ocorrência de sementes duras em quiabeiro (Abelmoschus esculentus (L.) Moench)

Setubal, José Walmar; Zanin, A.C.W; Nakagawa, João

doi:10.1590/s0103-90161994000300019

Cited by 7 publications

(9 citation statements)

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“…Line, 20.1.2, also with angular pods, although presenting decrease in germination and increase in hardseedness, expressed them in a much lesser degree than the other lines with angular pods. No hardseedness was observed among lines with round pods in any stage of development, in agreement with Setubal et al (1994), who did not find hardseedness in cultivar Santa Cruz 47 55 DAA.…”

Section: Resultssupporting

confidence: 88%

“…Pereira (1975) verified that seeds from pods located in the middle of the plant presented higher germination capacity than those extracted from pods located in plant ends and ramifications. Looking for information about pod maturation, Setubal et al (1994) concluded that, regarding seed production, the most adequate stage for pod harvesting is between 45 and 55 days after anthesis (DAA) for cultivars Campinas-2, Santa Cruz 47 and Amarelinho. In the case of cultivar Santa Cruz 47, Castro (2005) observed that seed quality decreased in pods harvested between 34 and 41 DAA without a post harvest resting period.…”

Section: Germination and Hardseedness Of Seeds In Okra Elite Linesmentioning

confidence: 99%

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Germination and hardseedness of seeds in okra elite lines

Purquerio¹,

Lago²,

Passos³

2010

Hortic. Bras.

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The occurrence of hardseedness and the low percentage of seed germination are major challenges when growing okra. For this reason, five elite lines of okra developed at the Campinas Agronomic Institute (IAC), three with angular pods (lines 8.1, 20.1.2 and 47.1) and two with cylindrical pods (lines 13.1.2 and 20.1.R), were evaluated for seed quality and compared to two commercial seed samples (Horticeres Sementes and Sakata Seed Sudamerica) of cultivar Santa Cruz 47. Seeds were field produced in an experiment set in the Technological Park of the Horticulture Center of IAC, in Campinas, São Paulo State, Brazil, in a randomized block design, with three replications and 20-plant plots. Fruits were harvested 25, 35, 45, 55, 65 and 75 days after anthesis (DAA). Seeds were extracted straight away and subjected to the standard germination test in the laboratory. Observing the results, we concluded that, as far as seed quality is concerned, angular pods must be harvested earlier than cylindrical pods, more precisely 45 DAA to the line 47.1 and 45 to 55 DAA for lines 8.1 and 20.1.2. Seeds extracted from angular fruits harvested after these periods had reduced germination and increased hardseedness. Seeds from cylindrical capsules had the same behavior of the commercial seeds of cultivar Santa Cruz 47, showing better germination when extracted from pods harvested between 55 and 75 DAA, and no hardseedness.

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Section: Resultssupporting

confidence: 88%

Section: Germination and Hardseedness Of Seeds In Okra Elite Linesmentioning

confidence: 99%

Germination and hardseedness of seeds in okra elite lines

Purquerio¹,

Lago²,

Passos³

2010

Hortic. Bras.

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“…In contrast, Demir (1997) reported that okra seeds failed to germinate until 32 DAA, and the highest germination percentage was observed when seeds were harvested at 39 and 43 days after anthesis. Setubal et al (1994) observed that the proportion of hard seeds increased significantly when the harvesting was delayed until the senescence of the plant. Passam et al (1998) reported that premature or late harvesting of pods results in reduced seed germination.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fertilizer and Drying Methods on Seed Germination of Okra (Abelmoschus esculentus L.) Cultivars at Different Harvesting Times

Mohammadi¹,

Khah²,

Petropoulos³

et al. 2013

JAS

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Okra hardseedness results in slow and uneven germination. This study determined the effects of fertilizer application and drying methods on hardseedness breakdown of okra (Abelmoschus esculentus L.) cultivars (cv. Boyiatiou', 'Veloudo', 'Clemson' and 'Pylias'). Three fertilizer level (150, 300 and 450 mg L -1 N) and two different drying methods (seeds and pods) were applied. The results showed that by increasing N application from 150 to 450 mg L -1 N increased seed germination regardless of drying method, whereas the application of 450 mg L -1 N resulted in the higher seed germination percentage, regardless of cultivar and drying method. In addition, harvesting seeds at 40 days after flowering (DAF) resulted in an increase of germination rate, especially when 450 mg L -1 N were applied. Seed germination of seeds harvested at 40 to 50 days after flowering (DAF) was reduced, especially when seed drying instead of pod drying was applied. However, for cv. 'Boyiatiou' the application of 150 mg L -1 N resulted in higher percentage of hard seeds and lower seed germination rate, whereas pod drying reduced the occurrence of hardseedness. For all cultivars, seeds from the middle part of the plant had a higher seed germination percentage at 450 mg L -1 N level, regardless of drying methods. In conclusion, increasing the N application rate up to 450 mg L -1 , harvesting seeds at 40 DAF and collecting seeds from the middle part of the plant could be a useful means for reducing the occurrence of hardseedness and increasing germination percentage of okra seeds.

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“…As altas taxas de germinação em menor tempo para a cv. Amarelinho pode ser explicada pela menor incidência de sementes duras, face a maior permeabilidade do tegumento, que segundo Setubal et al, (1994), é nula nessa cultivar. A cv.…”

Section: Resultsunclassified