Curva de absorção de água em sementes de atemóia (Annona cherimola Mill. x Annona squamosa L.) cv. Gefner

Ferreira, Gisela; Guimarães, Vandeir Francisco; Pinho, Sheila Zambello de; Oliveira, Marcos Campos de; Richart, Alfredo; Dias, Gláucia Bravo

doi:10.1590/s0100-29452006000100033

Cited by 18 publications

(18 citation statements)

References 6 publications

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“…Therefore, atemoya seeds presented transition between Phases I and II after 36 hours from the onset of imbibition (FERREIRA et al, 2006), while in A. emarginata seeds the process is even slower, approximately 109 hours to reach Phase II.…”

Section: Resultsmentioning

confidence: 94%

“…In studies with plant growth regulators in Annonaceae, the immersion period of the seeds is generally defined according to the stabilization of the water acquisition curve (FERREIRA et al, 2006;COSTA et al, 2011), when the transition from Phase I to Phase II of the germination process occurs, considering that the metabolic processes has already initiated in Phase I and that, in Phase II, the little water uptake by seeds occurs due to some change in the osmotic potential, caused by the degradation of reserves.…”

Section: Introductionmentioning

confidence: 99%

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Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

2014

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-The objective of this study was to evaluate the effect of different water contents achieved by Annona emarginata (Schltdl.) H. Rainer seeds during immersion in GA 3 solutions, in variation of soluble sugars levels and germination. Seeds with 10% of initial water content were submitted to imbibition in GA 3 solutions with concentrations of 0; 250; 500; 750 and 1000 mg L -1 and when they reached the water content of 15%, 20%, 25%, 30% and 35%, the quantification of soluble sugars levels and germination test were performed. Seeds immersed up to they reach 15% of water with GA 3 and immersed up to the water acquisition of 20% without GA 3 , presented higher soluble sugars levels and germination percentage, which were decreased when the seeds reached 30% and 35% of water, independently of the presence of the plant growth regulator. It was conclude that different water contents reached by the seeds in immersion treatments with GA 3 affect the soluble sugars levels and germination percentage of Annona emarginata seeds. Thus, in treatments with Annona emarginata, the seeds must remain immersed in water without GA 3 up to they reach 20% of water, as higher water contents (35%) reduce the soluble sugars levels and the seed germination percentage. Index terms: Annonaceae, "araticum-de-terra-fria", carbohydrates, imbibition. AÇÚCARES SOLÚVEIS E GERMINAÇÃO DE SEMENTES DE Annona emarginata (Schltdl.) H. Rainer SUBMETIDAS À IMERSÃO EM GA 3 ATÉ DIFERENTES TEORES DE ÁGUARESUMO -O objetivo deste trabalho foi avaliar o efeito de diferentes teores de água atingidos pelas sementes de Annona emarginata (Schltdl.) H. Rainer durante a imersão em soluções de GA 3 , na variação dos teores de açúcares solúveis e na germinação. Sementes com teor de água inicial de 10% foram colocadas para embeber em soluções com as concentrações de 0; 250; 500; 750 e 1.000 mg L -1 de GA 3, e ao atingirem os teores de 15%, 20%, 25%, 30% e 35% de água, procedeu-se à quantificação dos teores de açúcares solúveis e ao teste de germinação. As sementes imersas até atingirem 15% de água com a adição de GA 3 e imersas até a aquisição de 20% de água sem a adição de GA 3 apresentaram maiores teores de açúcares solúveis e porcentagens de germinação, os quais foram reduzidos à medida que as sementes atingiram 30% e 35% de água, independentemente do uso do regulador vegetal. Conclui-se que os diferentes teores de água alcançados pelas sementes nos tratamentos de imersão afetam os teores de açúcares solúveis e a germinação de sementes de Annona emarginata. Assim, em tratamentos com Annona emarginata, as sementes devem permancer imersas na água sem a adição de GA 3 até a aquisição de 20% de água, uma vez que elevados teores de água (35%) reduzem os teores de açúcares solúveis totais e a porcentagem de germinação das sementes. Termos para indexação: Annonaceae, "araticum-de-terra-fria", carboidratos, embebição.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

2014

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“…Thus, it may be important to use growth regulators in Annonaceae (Ferreira et al, 2002;Stenzel et al, 2003;. Costa (2009) and Ferreira et al (2006) observed that the seeds of A. emarginata and atemoya are permeable to water, but the movement of water is slow.…”

Section: Introductionmentioning

confidence: 99%

Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination

Corsato

Ferreira

Barbedo

2012

Braz. J. Plant Physiol.

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Annona emarginata (Schldtl.) H. Rainer ("araticum-de-terra-fria") is used as a rootstock for several species of Annonaceae. It is suggested that these seeds should be sown immediately after extraction and, therefore, they could be intolerant to desiccation. There are several mechanisms involved with desiccation tolerance. Soluble sugars, for example, can accumulate and act as osmoprotectants for the membrane system during desiccation. The aim of this study is to assess desiccation tolerance in A. emarginata seeds. In addition, we examined the soluble sugars involved in desiccation tolerance. Finally, we determined the effect of gibberellic acid (GA 4+7 ) and N-(phenylmethyl)-aminopurine in promoting the germination of seeds with different water contents. The experiment consisted of a randomized 4x5 factorial design (desiccation levels x concentration of growth regulators). After drying, seeds containing 31 (control), 19, 12 and 5% water were incubated in different concentrations of GA 4+7 N-(phenylmethyl)-aminopurine (0, 250, 500, 750 and 1000 mg L -1 ) for 60 hours. The experiment was conducted in a germination chamber with alternating temperature and photoperiod of 20ºC for 18 hours of darkness and 30ºC for 6 hours of light. We analyzed electrical conductivity, germination rate, mean germination time, germination speed, frequency and uniformity of germination, percentage of dormant seeds and soluble sugar profile in intact seeds through high-performance liquid chromatography (HPLC). The data were subjected to analysis of variance, and the means were compared using Tukey's test at a threshold of p<0.05. The results showed that seeds of A. emarginata appears to be desiccation tolerant and, also, that sucrose increases when seed water content is reduced to values as low as 12%, exogenous GA 4+7 +N-(phenylmethyl)-aminopurine improves its germinability.

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“…A fruta reúne qualidades das duas espécies que deram a sua hibridação, apresentando, porém, como forte característica, o sabor adocicado da cherimoia, muito apreciado pelos consumidores (Ferreira et al, 2006). Entretanto, um fator indesejável é a grande quantidade de sementes presentes nos frutos, quando comparada com a de sementes da cherimoia.…”

Section: Introductionunclassified

Uso de fitorreguladores no desenvolvimento de frutos na atemoieira (Annona cherimola x A. squamosa cv. Gefner)

et al. 2012

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The effect of plant growth regulators in the development of fruit of atemoya (Annona cherimola x A. squamosa cv. Gefner)This study aimed to to evaluate the effect of plant growth regulators on the fruit set of atemoya 'Gefner'. Three experiments were carried out in the municipality of Matias Cardoso, North of Minas Gerais. In the first experiment four types of auxins, indol-butyric acid (IBA), indol-acetic acid (IAA), naphthaleneacetic acid (NAA) and dichlorophenoxyacetic acid (2,4-D) were evaluated combined in three concentrations (150, 300 and 450 mg L -1 ). The giberellic acid (GA 3 ) also was used in the dosage of 1 g L -1 , at 14 and 21 days after the first application of the auxins. In the second experiment the IAA, IBA and NAA were tested combined in two concentrations (450 and 600 mg L -1 ). In the third experiment, the use of NAA was evaluated in the dose of 450 mg L -1 associated with number of applications: weekly up to 35 days; weekly up to 70 days; weekly up to 105 days and every 2 weeks. The GA 3 was used in the dosage of 1 g L -1 , in four applications, to 13, 27, 41 and 54 days after the first application of NAA. In all of experiments, the

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Curva de absorção de água em sementes de atemóia (Annona cherimola Mill. x Annona squamosa L.) cv. Gefner

Cited by 18 publications

References 6 publications

Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

Soluble sugars and germination of Annona emarginata (Schltdl.) H. Rainer seeds submitted to immersion in GA3 up to different water contents

Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination

Uso de fitorreguladores no desenvolvimento de frutos na atemoieira (Annona cherimola x A. squamosa cv. Gefner)

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