Influência da maturação dos frutos na emergência e crescimento inicial de Copernicia hospita Mart. - Arecaceae

Pereira, Diego de Sousa; Sousa, José Edilson Silva; Pereira, Magnum de Sousa; Gonçalves, Nayara Roberto; Bezerra, Antônio Marcos Esmeraldo

doi:10.1590/s1806-66902014000100025

Cited by 4 publications

(4 citation statements)

References 10 publications

(16 reference statements)

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“…In several studies, the color of fruit and seed teguments was considered as a criteria to monitor the ripening process and to determine the proper time to harvest E. uniflora (Avila et al, 2009), Erythrina variegata L. (Matheus et al, 2011), E. pyriformis (Lamarca et al, 2013), and Copernicia hospita Mart. (Pereira et al, 2014). In the case of guanandi, the changes in the external color of fruit were not a good criterion for determining harvesting time, since no color alterations were observed starting at 110 DAA (Figure 2), which is the stage corresponding to half of the whole ripening period.…”

Section: Resultsmentioning

confidence: 98%

Morphophysiological characteristics of guanandi fruit and seeds during ripening and harvesting time

Silva

Vieira

Panobianco

2018

Pesq. agropec. bras.

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The objective of this work was to determine the relationship of the morphological and physiological characteristics of guanandi (Calophyllum brasiliense) fruit and seeds with ripening and harvesting time. The reproductive cycle of a native plant population, located in the coast of the state of Paraná, Brazil, was monitored from anthesis until fruit dispersion, during three years. Monthly harvests were performed, and the morphological and physical aspects (color, size, dry mass, and moisture content) of fruit and embryos were evaluated, as well as the physiological ones (germination and vigor) of seeds. The ripening process of guanandi seeds occurred between 200 and 240 days after anthesis (DAA), with anthesis peak in February and fruit dispersion in October. The maximum dry matter mass accumulation was not synchronized with the maximum physiological potential of the seeds. Germination potential was reached close to the middle of the maturation process, and maximum vigor at the end of the cycle. Fruit external color did not change from 110 DAA onwards. The morphological characteristics related to harvesting time are fruit pulp and embryo weakly adherent to the endocarp and to the tegument, respectively, as well as the dark-brown color of these tissues.

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Section: Resultsmentioning

confidence: 98%

Morphophysiological characteristics of guanandi fruit and seeds during ripening and harvesting time

Silva

Vieira

Panobianco

2018

Pesq. agropec. bras.

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“…Ceres, Viçosa, v. 69, n.5, p. 619-627, sep/oct, 2022 related to the one proposed by Meerow and Broschat (2015), in which palm seeds in general have uneven and slow germination, caused by several factors, such as seed maturation stage, presence of mechanical dormancy caused by structures of the fruit, such as the rigid endocarp, which provide resistance to the embryo's expansion. The presence of the pericarp (epicarp and mesocarp) is a limiting factor in seed germination of some palm trees species (Teixeira et al;Beckmann-Cavalcante et al (2012); Pinto et al, 2012;Pereira et al, 2014). Based on these considerations, it was decided to remove these structures before starting the germination tests, in order not to interfere in the germination process.…”

Section: Resultsmentioning

confidence: 99%

Temperatures and light regimes in the germination of Areca vestiaria and Areca triandra seeds

et al. 2022

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Temperatures and light regimes in the germinationof Areca vestiaria and Areca triandra seeds 1Propagation of palm trees is mainly by seeds and, in general, germination is uneven and slow, caused by several factors, such as temperature and light. We aimed to evaluate the effect of different temperature conditions and light regimes in the germination of Areca vestiaria and Areca triandra seeds. Two experiments were carried. The experimental design was completely randomized with a 5 × 2 factorial (temperature × light), with four replicates per treatment for the species A. vestiaria and five replications for A. triandra, with 25 e 20 seeds, respectively. The temperatures tested were 25, 30, 35, 20-30 and 25-35 ºC and the light regimes were presence and absence of light. The germination percentage and germination speed index were evaluated. Analysis of variance was performed using the F Test, with subsequent comparison of the means using the Tukey test (α = 0.05). For both species, there were significant differences between the temperature conditions for the studied characteristics. It was concluded that temperatures of 25 ºC, 30 ºC, 25-35 ºC and 20-30 ºC are indicated for germination of seeds of the species Areca vestiaria and, 25-35 ºC for Areca triandra, being the seeds classified as neutral photoblastics.

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“…A pré-embebição de propágulos de Copernicia hospita por um período de cinco dias uniformizou o percentual de emergência, tendo sido reportados valores na faixa de 75% a 78% (PEREIRA et al 2014) e, para Copernicia prunifera, sob as mesmas condições, eles oscilaram entre 82% a 91% (SILVA et al 2009). BRAGA et al (2012 demonstraram que a hidratação promoveu o aumento do comprimento, da massa seca de plântulas e favoreceu a emergência de plântulas de Jatropha curcas.…”

Section: Resultsunclassified

Efeito da reidratação na germinação de sementes de açaí (Euterpe oleraceae Mart.)

Souza¹,

Santos²,

Gonçalves³

et al. 2018

Rev. Ciên. Agrovet.

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O esquema experimental utilizado foi o delineamento em blocos casualizados (DBC), com seis tratamentos (0, sem embebição (T1) e 3 (T2), 6 (T3), 9 (T4), 12 (T5) e 15 (T6) dias de reidratação por embebição em água), com sete repetições de 25 sementes. A semeadura foi realizada logo após o processo de reidratação. A avaliação da germinação ocorreu a cada 10 dias, com a contagem das sementes germinadas. As médias foram comparadas pelo teste de Scott-Knott, a 5% de probabilidade. Na avaliação do percentual de germinação, observou-se diferença significativa entre a testemunha (T1) e os demais períodos de reidratação (T4>T6>T5>T2>T3). Os resultados mostraram que o processo de reidratação foi favorável à produção de mudas, pois proporcionou maior porcentagem de germinação de sementes de açaí O pré-tratamento de reidratação acelerou a germinação das sementes e o melhor período de reidratação foi o de 9 dias, porque apresentou maior índice de velocidade de emergência de plântulas (IVE), além do menor tempo exigido para a condução do pré-tratamento. PALAVRAS-CHAVE: palmeira, Arecaceae, produção de mudas. ABSTRACTThe açaí (Euterpe oleraceae Mart.) is abundant in riparian forest of pluvial forest from the Amazonian region and is frequently associated with degraded environments of secondary vegetation. The objective of this work was to evaluate the effect of rehydration of açaí seeds, aiming to speed up and create uniform patterns for the seed germination. The experimental design used was random blocks with six treatments (rehydration by soaking the seeds in water for 0 (T1), 3 (T2), 6 (T3), 9 (T4), 12 (T5) or 15 (T6) days), with seven repetitions of 25 seeds each. The seeds were sown soon after the rehydration process. Germination was evaluated every 10 days by counting the germinated seeds. The averages were compared with the Scott-Knott test to the level of 5% probability. The results showed significant differences among the control (T1) and the others periods of rehydration (T4>T6>T5>T2>T3), which did not show significant differences among them. The results showed that the rehydration process favored seedlings production, as it provided a higher percentage of açaí seed germination. The pre-treatment of rehydration accelerated the germination of the seeds; and the best rehydration period was 9 days, because it presented a higher seedling emergence rate index (IVE), in addition to the shorter time required to conduct the pre-treatment.

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Influência da maturação dos frutos na emergência e crescimento inicial de Copernicia hospita Mart. - Arecaceae

Abstract: Influência da maturação dos frutos na emergência e crescimento inicial de Copernicia hospita Mart.-Arecaceae 1

Cited by 4 publications

References 10 publications

Morphophysiological characteristics of guanandi fruit and seeds during ripening and harvesting time

Morphophysiological characteristics of guanandi fruit and seeds during ripening and harvesting time

Temperatures and light regimes in the germination of Areca vestiaria and Areca triandra seeds

Efeito da reidratação na germinação de sementes de açaí (Euterpe oleraceae Mart.)

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