Ecofisiologia da germinação de sementes de Campomanesia pubescens

Dousseau, Sara; Alvarenga, Amauri Alves de; Guimarães, Renato Mendes; Lara, Túlio Silva; Custódio, Telde Natel; Chaves, Izabel de Souza

doi:10.1590/s0103-84782011000800011

Cited by 38 publications

(30 citation statements)

References 22 publications

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“…Values followed by letters between parentheses show the originals means. Dousseau et al 2011, Baskin & Baskin 2014, Zucareli et al 2015, Gomes et al 2016. The presence of light (8 h) in the alternating temperature condition was likely not responsible for the onset of the germination process, since the substrate used (paper roll) is not recommended for light-sensitive seeds (Brasil 2009).…”

Section: Resultsmentioning

confidence: 99%

Germination temperatures and treatments to overcome dormancy in Belamcanda chinensis seeds1

Silva

Baldini

Tomaz

et al. 2017

Pesqui. Agropecu. Trop.

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Belamcanda chinensis is an ornamental plant cultivated as a medicinal herb in its countries of origin: China and Japan. It is propagated by rhizomes and seeds, but little is known on the optimal conditions for its germination. This study aimed to assess germination temperatures and treatments to overcome its seed dormancy. Two experiments were conducted: the first evaluated the effects of constant temperatures of 20 ºC, 25 ºC and 30 ºC (in the dark) and 20-30 ºC with light (8-h photoperiod), while the second one involved the removal of combinations from the seed tegument structure (with and without tegument), with pre-hydration at 7 ºC, 30 ºC or no pre-hydration, in addition to an extra treatment without tegument or pre-hydration. Alternating the temperature results in better effects on the variables evaluated, while, at constant temperatures, there is little or no germination. The removal of the outer tegument structure and from seeds pre-hydrated at 30 ºC accelerates the germination process.

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Section: Resultsmentioning

confidence: 99%

Germination temperatures and treatments to overcome dormancy in Belamcanda chinensis seeds1

Silva

Baldini

Tomaz

et al. 2017

Pesqui. Agropecu. Trop.

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“…Similar results (30%) were reported by Melchior et al (2006) after fermentation removal of the mucilage covering these seeds. Dousseau et al (2011) reported a 35% water content of C. pubescens seeds after extraction from the fruits and superficial drying.…”

Section: Resultsmentioning

confidence: 99%

Conservation of Campomanesia adamantium (CAMB.) O. berg seeds in different packaging and at varied temperatures

Scalon

Oshiro

Masetto³

et al. 2013

Rev. Bras. Frutic.

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-This article aims at evaluating the effects of different packaging and varied storage temperatures on the germination potential of seeds of Campomanesia adamantium Camb. O. Berg. The seeds were packaged in glass, aluminum foil and plastic containers, or maintained inside intact fruits at 5, 10 and 15 ºC during 0, 7, 14 and 21 days. After these periods the seeds were sown in Germitest® germination paper and maintained in incubation chambers at 25 ºC under constant white light for 42 days. Seed moisture contents were evaluated both before and after storage, as well as germination percentages, germination speed index, root and aerial portion of seedlings lengths, and total dry weights. All possible combinations of packing materials, temperatures and storage times were tested, with four repetitions of 25 seeds for each treatment. C. adamantium seeds showed initial water contents of 31.5%. Glass and aluminum packaging were efficient at maintaining the water content of the seeds, and provided greater germination speed index than the other packaging materials. Germination percentages, seedlings lengths and dry weights did not vary among the different temperatures tested. C. adamantium seeds can be stored for up to 21 days at temperatures between 5 and 15 ºC without altering their physiological quality. In terms of cost-benefit efficiencies, these seeds can be stored without significant damage for 21 days while still inside the fruits at temperatures of 5, 10 or 15 ºC. Index terms: guavira; Brazilian savannah; native fruit; Myrtaceae; seed longevity. CONSERVAÇÃO DE SEMENTES DE Campomanesia adamantium (CAMB.) O. BERG EM DIFERENTES EMBALAGENS E TEMPERATURAS

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“…Investigating the MC and seed germinability by desiccation can be used to verify the recalcitrant seeds, and desiccation sensitivity was reported for several species. For example, a reduction in MC from 35% to 4% in Campomanesia pubescens seeds led to a decreased seed germination potential, rendering these seeds as recalcitrant [34]. Furthermore, germination percentage was zero after 30 days of desiccation when seed moisture content had decreased from 60.3% to 30.2%, suggesting that Aesculus chinensis seeds were also sensitive to desiccation and could be classified as recalcitrant [35].…”

Section: Changes Of Germination In G Biloba Seeds During Desiccationmentioning

confidence: 99%

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

Feng

Shen

Shi

et al. 2017

Forests

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Abstract:With the aim of investigating the antioxidant system and germinability in response to the desiccation of Ginkgo biloba seeds, they were put in a drying room (25 ± 2% relative humidity, 25 • C) for 67 days. Results showed that the germination rate remained constant when seed moisture content (MC) decreased from 48% (fresh seeds) to 45.1%. However, when MC reached 40.1%, the germination percentage decreased from 92% to 50%. A significant positive correlation was observed between the MC and seed germination percentage (r = 0.910). The electrical conductivity was significantly increased during the initial desiccation (48-45.1%). Furthermore, both the superoxide dismutase (SOD) and peroxidase (POD) activity first reduced, then elevated to peak values before they declined again. POD activity rose earlier than SOD activity, indicating that the POD reaction was more desiccation-sensitive than the SOD. Significant negative correlations were observed between the MC and malondialdehyde (MDA) content (r = −0.619) and electrical conductivity (r = −0.745). Our collective results suggest that G. biloba seeds are highly sensitive to desiccation. Excessive desiccation could reduce the antioxidant enzyme activity of G. biloba seeds and intensify membrane lipid peroxidation, which causes the consequent reduction-or even the complete loss-of seed germinability.

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Ecofisiologia da germinação de sementes de Campomanesia pubescens

Abstract: Ecophysiology of Campomanesia pubescens seed germinationRecebido para publicação 24.11. 30, 60, 90, 120, 150, 180, 260, 360, 750 (15-25, 20-30°C alternate, 25 and 30°C constant), 3 substrates (paper, sand and vermiculite) 30, 60, 90, 120, 150, 180, 260, 360, 750

Cited by 38 publications

References 22 publications

Germination temperatures and treatments to overcome dormancy in Belamcanda chinensis seeds1

Germination temperatures and treatments to overcome dormancy in Belamcanda chinensis seeds1

Conservation of Campomanesia adamantium (CAMB.) O. berg seeds in different packaging and at varied temperatures

Changes in Seed Germination Ability, Lipid Peroxidation and Antioxidant Enzyme Activities of Ginkgo biloba Seed during Desiccation

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