Mobilisation of reserves during germination of seeds of Tabebuia roseo-alba (Bignoniaceae)

Abbade, Leticia Caravita; Takaki, Massanori

doi:10.15258/sst.2012.40.2.11

Cited by 3 publications

(3 citation statements)

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“…The recent findings describe the special role of lipids in germination and seedling growth (Abbade and Takaki, 2012;Soltani et al, 2002). However, the response of seed vigor to fatty acid composition is not clearly known.…”

Section: Tablementioning

confidence: 99%

Effects of phosphorus and seed priming on seed vigor, fatty acids composition and heterotrophic seedling growth of black seed (Nigella sativa L.) grown in a calcareous soil

Seyyedi

Khajeh-Hosseini

Moghaddam

et al. 2015

Industrial Crops and Products

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Section: Tablementioning

confidence: 99%

Effects of phosphorus and seed priming on seed vigor, fatty acids composition and heterotrophic seedling growth of black seed (Nigella sativa L.) grown in a calcareous soil

Seyyedi

Khajeh-Hosseini

Moghaddam

et al. 2015

Industrial Crops and Products

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“…However, seed germination for T. roseoalba is significantly reduced after 60-day storage in the laboratory (Carvalho et al, 2006) and seed viability decreases after 180 days when the seeds are packed in cans and kept in a refrigerator (Borba Filho and Perez, 2009). Loss of viability during storage may be due to a small amount of seed reserves, which is rapidly consumed during germination (Abbade and Takaki, 2012).…”

Section: Introductionmentioning

confidence: 99%

Biochemical and physiological changes of Tabebuia roseoalba (Ridl.) Sandwith (Bignoniaceae) seeds under storage

Abbade

Takaki

2014

J. Seed Sci.

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-Tabebuia roseoalba (Ridl.) Sandwith is a Brazilian forest species, with great use in landscaping and reforestation, occurring mainly in the semi-deciduous forest. Seeds are small, lightweight, winged and wind-dispersed. The objective of this study was to verify the physiological quality and biochemical changes in T. roseoalba seeds during 24-month storage. The following were assessed: germination, emergence, seedling length and seedling dry weight, content of lipids, proteins and phenolic compounds, and enzyme activity. Loss of seed quality during storage was evidenced by reduced germination and emergence, shorter seedling length and lower seedling dry weight, decreased content of lipids and proteins, decreased peroxidase and catalase activity, and increased phenolic compound content and polyphenol oxidase activity. Seeds should be stored and used within six months after collection.Index terms: germination, emergence, lipids, peroxidase, polyphenol oxidase, catalase.Alterações bioquímicas e fisiológicas das sementes de Tabebuia roseoalba (Ridl.) Sandwith (Bignoniaceae) submetidas ao armazenamento RESUMO -O ipê-branco (Tabebuia roseoalba (Ridl.) Sandwith) é uma espécie florestal brasileira, com grande utilidade em paisagismo e reflorestamento, ocorrendo principalmente na floresta semidecídua. Suas sementes são pequenas, leves, aladas e dispersadas pelo vento. O objetivo neste trabalho foi verificar a qualidade fisiológica e as alterações bioquímicas das sementes de ipê-branco durante o armazenamento por 24 meses. Avaliou-se a germinação, emergência, comprimento e massa seca das plântulas, o conteúdo de lipídios, proteínas, a atividade enzimática e compostos fenólicos. A perda de qualidade fisiológica das sementes durante o armazenamento foi evidenciada pela redução da germinação, da emergência, do menor comprimento e massa seca das plântulas, da diminuição dos níveis de lipídeos e proteínas, da atividade da peroxidase e catalase e do aumento de compostos fenólicos e da atividade da polifenoloxidase. As sementes devem ser armazenadas e utilizadas até seis meses após a coleta.

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“…During the germination process, different enzymes are involved in the mobilization and use of seed reserves (Abbade & Takaki 2012;Bettey & Finch-Savage 1996), and their activity is directly affected by the pH of the medium since this factor acts on the kinetics of most enzymes (Orij et al 2009). Thus, seeds soaked in acidic (5.7) and alkaline (7.7 and 8.7) pH in the experiment may have reduced the synthesis and action of enzymes necessary for the germination of Z. tuberculosa seeds, which caused a delay in the process.…”

mentioning

confidence: 99%

Under ground: what pH favors germination and the root growth of Zeyheria tuberculosa (Vell.) Bureau ex Verl.

Ferreira,

Torres,

Boas

et al. 2023

Acta Bot. Bras.

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This work aimed to examine the germination and initial growth of Zeyheria tuberculosa (Vell.) Bureau ex Verl. seedlings at different pH values. pH of the deionized water was adjusted with hydrochloric acid and/or sodium hydroxide to 4.7, 5.7, 6.7, 7.7 and 8.7. The following parameters were evaluated: final germination percentage (GP), germination speed index, time required for 50% germination, germination rate, viability of the remaining seeds and length of the radicle. All parameters were reduced in alkaline pH. Maximum germination of 94% was reached in the treatment control, followed by pH 4.7. At alkaline pH (7.7 -8.7), GP was 43 and 31%, respectively. Therefore, at these pHs, germination was reduced. We provided direct evidence that pH is a limiting factor for germination and for the radicle growth of Z. tuberculosa seedlings. In addition, we show experimental evidence of why this species is widely distributed in the Cerrado biome, where the soils are more acidic, and the relationship between soil composition and high germination in acidic medium was corroborated with this study. We suggest that the germination test at different pHs be included in reforestation programs with native species to predict the establishment of seedlings in soils with different pH.

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Mobilisation of reserves during germination of seeds of Tabebuia roseo-alba (Bignoniaceae)

Cited by 3 publications

References 0 publications

Effects of phosphorus and seed priming on seed vigor, fatty acids composition and heterotrophic seedling growth of black seed (Nigella sativa L.) grown in a calcareous soil

Effects of phosphorus and seed priming on seed vigor, fatty acids composition and heterotrophic seedling growth of black seed (Nigella sativa L.) grown in a calcareous soil

Biochemical and physiological changes of Tabebuia roseoalba (Ridl.) Sandwith (Bignoniaceae) seeds under storage

Under ground: what pH favors germination and the root growth of Zeyheria tuberculosa (Vell.) Bureau ex Verl.

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