Armazenamento e germinação de sementes de uvaia Eugenia uvalha Cambess

Scalon, Silvana de Paula Quintão; Rigoni, Marilúcia Rossi

doi:10.1590/s1413-70542004000600002

Cited by 27 publications

(28 citation statements)

References 3 publications

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“…(Myrtaceae) é frutífera nativa do Brasil que produz frutos de grande interesse comercial, industrial e farmacológico. Os frutos têm tamanho, forma, cor de casca e sabor atrativos ao consumo in natura, e a composição físico-química de sua polpa oferece grande qualidade organoléptica e nutricional (Scalon et al, 2004a(Scalon et al, , 2004bDelgado & Barbedo, 2007;Oliveira et al, 2010). Diversas espécies de Eugenia apresentam interesse para a exploração industrial.…”

Section: Introductionunclassified

Potencial de inibição da regeneração de raízes e plântulas em sementes germinantes de Eugenia pyriformis

Amador

Barbedo

2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o potencial de inibição da formação de raízes e plântulas, em sementes germinantes de uvaieira (Eugenia pyriformis), fragmentadas e fissuradas. As sementes foram separadas por tamanho em dois grupos. Cada grupo foi separado em dois subgrupos, um dos quais foi submetido a teste de germinação. As sementes de cada subgrupo foram submetidas a dois tipos de incisão (total ou parcial) e, em seguida, foram avaliadas quanto à produção de raízes e plântulas. Em sementes com incisão parcial, que apresentavam apenas uma plântula desenvolvida, completou-se a incisão até que as metades fossem separadas. A metade com a raiz foi descartada, e sua complementar foi colocada para germinar, para avaliação da produção de raízes e plântulas nessas frações sem raízes. Em todos os experimentos, utilizou-se o delineamento inteiramente casualizado, em arranjo fatorial 2x2 (tamanho das sementes x germinação visível) e 2x4 (tamanho das sementes x tipo de incisão). As sementes fracionadas de uvaieira apresentam potencial para regeneração de raízes e plântulas, e podem produzir mais de uma muda por semente. A germinação inicia processos de inibição da regeneração de novas raízes e plântulas na semente, e a incisão dos cotilédones pode bloquear essa inibição.Termos para indexação: fracionamento, inibidores, produção de mudas, regenerabilidade, uvaieira. Potential for regeneration inhibition of roots and seedlings in germinating Eugenia pyriformis seedsAbstract -The objective of this work was to evaluate the potential for inhibiting the formation of new roots and seedlings from germinating seeds of "uvaieira" (Eugenia pyriformis), fragmented and fissured. Seeds were separated by size into two groups. Each group was separated into two subgroups, one of which was subjected to germination test. Seeds of each subgroup were subjected to two types of incision (total or partial) and, then, evaluated as for the production of roots and seedlings. Seeds with partial incision, which had only one developed plantlet, had the incision completed until the halves were separated. The half fragment containing the root was discarded, and its complementary part was placed to germinate, in order to evaluate the production of roots and seedlings in these fractions without the roots. The design in all the experiments was completely randomized, in a 2x2 factorial arrangement (length x seed visible germination) or 2x4 (seed size x incision type). Fragmented seeds of "uvaieira" shows potential for root and seedling regeneration and can produce more than one seedling per seed. Germination starts inhibition processes of formation of new roots and plantlets, and the incision of cotyledons can block this inhibition.

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Section: Introductionunclassified

Potencial de inibição da regeneração de raízes e plântulas em sementes germinantes de Eugenia pyriformis

Amador

Barbedo

2011

Pesq. agropec. bras.

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“…Literature has demonstrated that endogenous compounds that promote and inhibit growth are directly involved in the germination process (ARAGÃO et al, 2003;PASSOS et al, 2004;SCALON et al, 2004). These substances may act alone or in combination with others, not only during the germination process but also in postgermination events such as energy reserve mobilization.…”

Section: Introductionmentioning

confidence: 99%

Effect of gibberellic acid and temperature on germination of Vitex montevidensis Cham

Malavasì

Dias²,

Malavasi

2011

CERNE

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This work aims to evaluate treatments that may help improve speed and uniformity of germination in fruit tree species tarumã. Data were obtained from pyrenes (stones) of ripe fruits which in turn were picked from adult trees in the municipality of Vera Cruz do Oeste-PR. Treatments consisted of applying GA 3 solutions at various concentrations (zero, 50 mg L -1 , 100 mg L -1 or 200 mg L -1 ) to pyrenes via immersion for 47 hours, and thermoperiods of alternate 20ºC and 30ºC (8 hours at 20ºC in light conditions, and 16 hours at 30ºC in dark conditions) and constant 30ºC with the same photoperiod. The combination of alternate temperatures of 20ºC and 30ºC with a 200 mg L -1 GA 3 solution resulted in an increase both in germination percentage, from 19.2% to 56.2%, and in the germination speed index, from 0.19 to 3.12, with resulting normal, uniform seedlings.

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“…Dormant seeds of Eugenia uvalha Cambess. stored for 60 and 90 days under refrigeration (13 ± 2 °C) showed a higher germinability and emergence rate than seeds stored at room temperature, whereas the latter was more effective than cold storage after 30 days (Scalon et al 2004). Thus, considering that the storage time and temperature can modify the dormancy status of the seed, more research is required to test the response of V. tucanorum to storage since the relatively short storage time used (14 days), as well as the lack of dormancy of the seed batch, do not allow any general conclusion to be made about the effect of the storage temperature Table 1.…”

Section: Resultsmentioning

confidence: 93%

Note on the germination of Vochysia tucanorum seeds treated with growth regulators

Pereira¹,

Simão²,

Filho³

et al. 2011

Rev. bras. Bot.

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-(Note on the germination of Vochysia tucanorum seeds treated with growth regulators). The aim of this work was to evaluate the germination response of Vochysia tucanorum Mart. seeds treated with GA 3 and CEPA and germinated under white light or darkness. Newly collected seeds from a Cerrado area were stored for 14 days at two temperatures (25 °C ± 2 and 7 °C ± 1). After the storage period the seeds were pre-treated with distilled water (control), gibberellic acid (GA 3 ), 2-chloroethylphosphonic acid (CEPA) and a mixture of GA 3 + CEPA. Following this, the seeds were sown in Petri dishes on filter paper moistened with distilled water and germinated in either darkness or white light. The results suggest that seeds are non-photoblastic and non-dormant, however a photoblastic behavior emerges when the seeds were previously stored at low temperature and imbibed in CEPA and GA 3 solutions. In general, there is no difference between the 7 °C and 25 °C storage temperatures. The germination of seeds pre-treated with CEPA and CEPA + GA 3 under white light was faster as compared to the distilled water control, and the effect of the CEPA + GA 3 mixture was more pronounced than CEPA alone. Thus, the germination rate of V. tucanorum seeds can be improved by treatment with CEPA or CEPA + GA 3 under white light.Key words -CEPA, ethylene, gibberellin, light, temperature RESUMO -(Nota sobre a germinação de sementes de Vochysia tucanorum tratadas com reguladores vegetais). O objetivo deste trabalho foi avaliar a resposta germinativa sob luz branca e escuro de sementes de Vochysia tucanorum Mart. tratadas com GA 3 e CEPA. Sementes recém-coletadas de uma área de Cerrado foram armazenadas durante 14 dias em duas temperaturas (25 ± 2 °C e 7 ± 1 °C). Após o período de armazenamento, as sementes foram pré-tratadas com água destilada (controle), ácido giberélico (GA 3 ), ácido 2-cloroetilfosfônico (CEPA) e uma mistura de GA 3 + CEPA; em seguida, as sementes foram semeadas em placas de Petri sobre papel filtro umedecido com água destilada e colocadas para germinar em escuro e sob luz branca. Os resultados sugerem que as sementes não são fotoblásticas nem dormentes, no entanto um comportamento fotoblástico emerge quando as sementes foram previamente armazenadas em baixa temperatura e embebidas em soluções de GA 3 e CEPA. Em geral, não houve diferença entre as temperaturas de armazenamento de 7 °C e 25 °C. A germinação sob luz branca de sementes pré-tratadas com CEPA + GA 3 e CEPA foi antecipada, em comparação com o controle de água destilada, sendo que o efeito da mistura CEPA + GA 3 foi mais pronunciado do que o de CEPA sozinho. Assim, a taxa de germinação de sementes de V. tucanorum, sob luz branca, pode ser melhorada pela embebição das mesmas em soluções de CEPA ou de CEPA + GA 3 .

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Armazenamento e germinação de sementes de uvaia Eugenia uvalha Cambess

Cited by 27 publications

References 3 publications

Potencial de inibição da regeneração de raízes e plântulas em sementes germinantes de Eugenia pyriformis

Potencial de inibição da regeneração de raízes e plântulas em sementes germinantes de Eugenia pyriformis

Effect of gibberellic acid and temperature on germination of Vitex montevidensis Cham

Note on the germination of Vochysia tucanorum seeds treated with growth regulators

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