Produção do porta-enxerto (Annona squamosa L.) com o uso de reguladores vegetais

-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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“…Mart. (SOCOLOWSKI; CICERO, 2011), Annona squamosa L. (FERREIRA et al, 2002;SOUSA et al, 2008), Annona crassiflora Mart. (BERNARDES et al, 2007).…”

Section: Resultsmentioning

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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“…Ferreira, Erig and Moro (2002a) investigated the effects of different GA 3 concentrations on sugar apple (Annona squamosa) seed germination and seedling emergence in different packaging and tested seven GA 3 concentrations ranging from 0 to 1.000 mg L -1 for 5 h. They concluded that GA 3 positively influenced seed germination of the species, but did not affect seedling emergence in the packaging tested. In the same context, Ferreira, Erig and Moro (2002b) assessed the effects of different GA 3 -based products (Progibb and Promalin) and their concentrations (25; 50 and 75 mg L -1 ) and a control and verified that using GA 3 gave more effective responses for several parameters when assessed at 50-75 mg L -1 . For the stem length and diameter parameters, the same authors calculated the maximum technically efficient GA 3 concentration , 65.37 and 65.97 mg L -1 , respectively.…”

Section: Introductionmentioning

confidence: 75%

Physical and chemical methods to breach seed dormancy of sugar apple

Chagas¹,

Sobra²,

Oliveira³

et al. 2013

RCA

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Cultivation of sugar apple has increased in the Setentrional Amazon, but one of the problems for obtaining quality seedlings is related to overcoming dormancy of its seeds. The objective of the present study was to evaluate the efficiency of physical and chemical methods to break sugar apple seed dormancy. Ripe sugar apple fruit were collected from an orchard located in Boa Vista-RR, pulped and their seeds washed in running water and dried in the shade for 24 h. A completely randomized experimental design was used in a factorial 2 (0 and 1000 mg L-1 GA 3 = gibberellic acid) × 4 immersion times (0, 6, 12 and 24 h) × 2 (with and without scarification) with 4 replications and 50 seeds per replication. The seeds were then sown in beds under greenhouse-type shade with 50% brightness in soil and sand mixture (3:1 v / v) subtrate. The following were evaluated 30 days after sowing: percentage of emergence (%) and shoot growth after seedling emergence, at four-day intervals. At fifty-eight days after sowing, the shoot and root lengths, number of leaves, shoot and root dry matter were assessed. The highest sugar apple seedling emergence speed and growth rate were obtained when the seeds were subjected to the method of scarification and soaking in GA 3 for 12-24 h. Scarification and soaking in water for 24 h resulted in greater economy, practicality and financial savings.

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Produção do porta-enxerto (Annona squamosa L.) com o uso de reguladores vegetais

Cited by 2 publications

References 2 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

Physical and chemical methods to breach seed dormancy of sugar apple

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