Tipos de substratos para germinação de sementes de palmeira- real-australiana (Archontophoenix alexandrae H. Wendl. &amp; Drude)

Martins, Cibele Chalita; Caldas, Isliana Griebler Ribeiro; Machado, Carla Gomes; Dourado, Wilson de Souza

doi:10.1590/s0100-67622011000700005

Cited by 3 publications

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References 8 publications

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“…Germination speed can be influenced by the texture of the substrate and, depending on the species, the seeds may (Martins et al, 2011), E. uniflora (Sena et al, 2010) and Adenanthera pavonina L. (Alves et al, 2015) in fine vermiculite. Basaplant ® and coarse vermiculite were the least adequate substrates for the germination of P. volublis seeds, because they led to the lowest percentages of germination and highest percentages of hard seeds.…”

Section: Resultsmentioning

confidence: 99%

Temperature and substrate on Plukenetia volubilis L. seed germination

Silva

Vieira

Boneti

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this work was to evaluate the effect of temperature and substrate on the germination of P. volubilis seeds. Seeds harvested from 25 matrix plants were submitted, in two studies, to conditions of (i) sowing in rolled paper towel at the temperatures of 10, 15, 20, 25, 30, 35, 40, and 45 °C, for the evaluation of germination, first count of germination, germination speed index and mean time for germination, and (ii) sowing in the substrates paper towel, sand, Bioplant®, Bioplant® and micron, superfine, fine, medium and coarse vermiculite. The same evaluations mentioned in the first study were conducted at the temperature of 30 o C, as well as plant growth. The treatment replicates were distributed in a completely randomized block design and the effects of temperature were compared by polynomial regression analysis. The substrates were compared by the Scott-Knott test at 0.05 probability level. The data show that the ideal range of temperature for the germination of P. volubilis is between 25 and 30 °C. The temperature of 20 °C is the minimum for germination and those above 35 °C are lethal to these seeds. The most favorable substrate for P. volubilis seed germination is micron or fine vermiculite.Temperatura e substrato na germinação de sementes de Plukenetia volubilis L. R E S U M OObjetivou-se, neste trabalho, avaliar o efeito de temperaturas e substratos na germinação de sementes de P. volubilis. Sementes colhidas em 25 plantas matrizes foram avaliadas em dois estudos: (i) semeadura em rolo de papel nas temperaturas 10, 15, 20, 25, 30, 35, 40 e 45 ºC, avaliando-se a germinação, primeira contagem, índice de velocidade de germinação e tempo médio de germinação; e (ii) semeadura nos substratos rolo de papel, entre areia, entre Basaplant®, entre Bioplant® e entre vermiculita mícron, superfina, fina, média e grossa; conduzindo-se a 30 ºC os mesmos testes descritos no primeiro estudo e também o crescimento de plântulas. Os dados foram analisados em delineamento inteiramente casualizado com análise de regressão polinomial para a avaliação das temperaturas. Para a comparação entre os substratos utilizou-se o teste de Scott Knott, a 0,05 de probabilidade. Conclui-se que a germinação de sementes de P. volubilis deve ser conduzida nas temperaturas de 25 a 30 o C. A temperatura de 20 o C é a mínima para a germinação e as acima de 35 o C são letais para essas sementes. O substrato mais favorável à germinação de sementes de P. volubilis é a vermiculita mícron ou fina.

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Section: Resultsmentioning

confidence: 99%

Temperature and substrate on Plukenetia volubilis L. seed germination

Silva

Vieira

Boneti

et al. 2016

Rev. bras. eng. agríc. ambient.

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“…Sphagnum and sand had a lower percentage of seed germination with 62 and 68%, respectively (Table 2). Micron vermiculite moistened with 1.0 times its weight with water was had the best performance as substrate for A. alexandrae seeds germination, inducing maximum seed germination and germination rate (MARTINS et al, 2011). Charlo et al (2006) observed the highest seed germination rates for A. alexandrae on the commercial substrate Plantmax with 86.3% germination, even higher than sand.…”

Section: Resultsmentioning

confidence: 95%

“…Temperatures between 20 and 40 °C are acceptable for palm seed germination, with best results for most palm species at 30 and 35 °C (MEEROW, 1991, BROSCHAT, 1994. However, studies have shown that different species of palms require different ranges of temperatures for germination, such as 35 °C for Thrinax parviflora (PIVETTA et al, 2005a), 25 to 30 °C for Phoenix roebelenii (IOSSI et al, 2003) and Rhapis excelsa (LUZ et al, 2008a), and 30 to 35 °C for Syagrus romanzoffiana (PIVETTA et al, 2005b Phoenix canariensis (PIMENTA et al, 2010), alternate 20-30 °C for A. alexandrae (MARTINS et al, 2011), 25 to 35 °C for Livistona chinensis (KOBORI et al, 2009), and 24 to 29 °C for Dypsis decaryi (LUZ et al, 2008b).…”

Section: Introductionmentioning

confidence: 99%

Germination of Archontophoenix cunninghamiana (Australian king palm) seeds based on different temperatures and substrates

Luz

Tavares

Pivetta

2017

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Archontophoenix cunninghamiana or Australian King Palm, is a very popular ornamental palm in Brazil. Although A. cunninghamiana is propagated by seeds, few studies have reported on seed germination of this species. Therefore, this study aimed to evaluate the effect of different temperatures and substrates on the germination of A. cunninghamiana seeds. To carry out the temperature experiment, constant temperatures of 20, 25, 30 or 35 °C and alternating temperatures of 20/30 °C or 25/35 °C were used with four replications of 25 seeds each. For the substrate experiment, sand, vermiculite, and sphagnum moss were used with 7 replicates of 25 seeds per treatment in a completely randomized design. All temperatures, except 35 °C, favored the germination of A. cunninghamiana seeds (60%). Vermiculite was determined to be best suited for the germination of A. cunninghamiana seeds. Overall, the germination of A. cunninghamiana seeds is slow and uneven, in turn allowing for a longer period of germination. Keywords: Archontophoenix cunninghamiana, diaspore, germination index, Palmae. RESUMO Germinação de sementes de Archontophoenix cunninghamiana (Palmeira real australiana)em diferentes temperaturas e substratos Archontophoenix cunninghamiana ou palmeira real australiana, é uma palmeira ornamental muito popular no Brasil. Embora A. cunninghamiana seja propagada por sementes, poucos estudos têm relatado a germinação de sementes da espécie. Portanto, este estudo teve como objetivo avaliar o efeito de diferentes temperaturas e substratos na germinação de sementes de A. cunninghamiana. Para o experimento de temperatura foram utilizadas as temperaturas constantes de 20, 25, 30 ou 35 °C e temperaturas alternadas de 20/30 °C ou 25/35 °C com quatro repetições de 25 sementes cada. Para a experiência do substrato, foram utilizados areia, vermiculita e musgo esfagno com 7 repetições de 25 sementes por tratamento, em delineamento inteiramente casualizado. Todas as temperaturas, exceto 35 °C, favoreceram a germinação de sementes de A. cunninghamiana (60%). A vermiculita foi o substrato mais adequado para a germinação de sementes de A. cunninghamiana. Em geral, a germinação de sementes de A. cunninghamiana foi lenta e desigual, por sua vez, permitindo um período mais longo de germinação. Palavras-chave: Archontophoenix cunninghamiana, diasporo, índice de germinação, Palmae.

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“…testemunha, como rolo de papel, solo e areia, além de se observar valores altos de emergência e velocidade de emergência(MARTINS et al, 2011).A emergência das plântulas oriundas de sementes com o tegumento removido foi 42% superior comparada às que mantiveram o tegumento, quando semeadas no substrato orgânico (Tabela 2). Já no substrato vermiculita, esta discrepância reduziu para 35%.…”

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