Water absorption and improvement of methods for electrical conductivity test in acacia seeds

Oliveira, Daniel Luiz de; Smiderle, Oscar José; Paulino, P. P. S.; Souza, Aline das Graças

doi:10.15517/rbt.v64i4.21944

Cited by 11 publications

(16 citation statements)

References 18 publications

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“…Such information is fundamental to know the germination potential and use of each source, serving as an indicator of anticipation in obtaining better quality seedlings, as well as to assist in recommending and supporting programs for the recovery of degraded areas, conservation, resources and also to evaluate the genetic variability within populations of the same species (Mendonça et al, 2016;Ken-iti Yokomizo et al, 2016;Bardales-lozano et al, 2016;Silva Moura et al, 2016;Oliveira et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Emergency and Growth of Andiroba Seedlings (Carapa guianensis Aubl.) in Function of the Seeds

Brito¹,

Sousa²,

Silva³

et al. 2019

JAS

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Andiroba (Carapa guianensis Aubl.-Meliaceae) is considered an Amazonian forest species with great potential for multiple use in natural forests. Because it is a native species of the Amazon rainforest, it has great socioeconomic importance for the extractive population due to the oil extracted from its seeds. The speed of emergence is an important factor in the establishment of seedlings, since the longer the seeds remain inside the soil, the seeds are in the soil, the greater the chances that the seeds will be attacked by fungi and soil insects. The objective of this work was to determinate the speed of andiroba emergence (Carapa guianensis Aubl.) seedlings and the development. The experiment was carried out in a greenhouse belonging to Federal Rural University of Amazonia (UFRA)-Capitão Poço, Brazil. Fruits of C. guianensis were collected in floodplain areas in northeastern of Pará. The treatments were arranged according to the seed mass. Were calculated 5 variables after sowing (emergence speed index; height; interference of the mass of andiroba seeds at the height of the seedlings stem; interference of the mass of andiroba seeds in the number of leaves; interference of the mass of andiroba seeds in the number of leaflets). The experimental design was completely randomized, consisting of 4 treatments with 5 replicates with 5 seeds per replicate (5 seeds per vessel), totaling 25 seeds per treatment. The data were statistically analyzed using the Tukey test at 5% probability with the software Assistat 7.6. The seed mass classes did not influence ESI (Emergence Speed Index). The seed mass promoted significant effects on 4 variables. The mass of the seeds of andiroba does not influence the ESI of seedlings for it own production. The heavy and very heavy seeds generated more developed plants.

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Section: Resultsmentioning

confidence: 99%

Emergency and Growth of Andiroba Seedlings (Carapa guianensis Aubl.) in Function of the Seeds

Brito¹,

Sousa²,

Silva³

et al. 2019

JAS

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“…Specifically, the conductivity increases more modestly for large-sized seeds compared to small-sized seeds (p<0.01); no significant differences were observed between large-sized seeds and medium-sized seeds ( Figure 1A). In other woody species such as Jatropha curcas and Acacia mangium, small seeds showed the highest electrolyte leakage (Pompelli et al, 2010 andDe Oliveira, et al, 2016). Moreover, the conductivity increases more modestly for seeds aged 10 d than for seeds aged 30 d (p<0.05) and seeds aged 100 d (p<0.01); no significant differences were observed between seeds aged 30 d and seeds aged 100 d ( Figure 1B).…”

Section: Electrical Conductivity Testmentioning

confidence: 90%

Storage, size and vigor of ‘Esther’ avocado seeds (Persea americana Mill.)

Gálvez-Cendegui

Peñaloza

Oyanedel

et al. 2017

Ciencia e investigación agraria

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Luisa Gálvez-Cendegui, Patricia Peñaloza, Eduardo Oyanedel and Mónica Castro. 2017. Storage, size and vigor of 'Esther' avocado seeds (Persea americana Mill.). Cien. Inv. Agr. 44(1): 94-99. Avocado seeds present high size variability. Larger seeds, such those of the 'Esther' variety, are preferred when nurse seeds are used. Even though they are considered recalcitrant seeds, they are stored for propagation. The aim of this study was to evaluate the combined effect of three storage periods and three sizes of 'Esther' avocado seeds on vigor, in terms of electrolyte leakage, and seedling length and diameter. The experiment was conducted using a completely randomized factorial design. The factors were time in storage (10, 30 and 100 d at 5 °C and 80% relative humidity) and seed size (small, medium and large). Electrolyte leakage was evaluated as a measure of seed vigor, growth and later development of the seedlings. Seeds stored for 30 and 100 d showed the highest electrolyte leakage but produced seedlings with a larger stem diameter than 10-day-old seeds. The seeds stored for 100 d generated seedlings with stems three times wider than the seedlings stored for 10 d. The changes observed in electrical conductivity showed differences between the different sizes and storage times of seeds. It is concluded that storage time had a positive effect on the growth of 'Esther' avocado seedlings (length and diameter of the stem) regardless of the seed size. Electrolyte leakage was affected by seed age and seed size but did not correlate with subsequent seedling growth.

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“…Caracterização química e granulometria do substrato utilizado para a germinação e desenvolvimento inicial de plântulas de camu-camu (Myrciaria dubia) (Mendonça et al, 2016;Yokomizo et al, 2016;Bardales-Lozano et al, 2016;Moura et al, 2016;Oliveira et al, 2016 …”

Section: Tabelaunclassified

Influence of seed size on germination and vigor of seedlings of Camu-Camu

et al. 2017

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ResumoO camu-camu (Myrciaria dubia) é uma espécie frutífera nativa da Amazônia e sua importância econômica é comprovada devido ao fruto conter elevado teor de ácido ascórbico. O trabalho foi realizado com objetivo de avaliar a germinação e vigor de plântulas obtidas de sementes de diferentes tamanhos de duas populações de camu-camu. O delineamento experimental utilizado foi o inteiramente casualizado em esquema fatorial de 2 x 3 (duas procedências: rio Anauá e rio Urubu e três tamanhos de sementes: pequeno, médio e grande) com 5 repetições de 20 sementes por parcela. As sementes da procedência do rio Anauá, apresentaram maior massa (1,46 g) comparada com a procedência do rio Urubu (0,78 g). O percentual de emergência e velocidade de emergência de plântulas apresentaram melhores valores para a população do rio Anauá, justificando-se a adoção de escolha de procedência para a formação de mudas. Para comprimento do sistema radicular, massa seca da parte aérea e massa seca do sistema radicular, as sementes classificadas como média e grande oriundas do rio Anauá apresentaram maiores valores. As classes de massa das sementes apresentam um caractere importante para ser utilizado na produção de mudas de Myrciaria dubia. As sementes da procedência do rio Anauá são potencialmente mais vigorosas sendo indicadas para a produção de mudas de camu-camu (Myrciaria dubia).Palavras chave: Myrciaria dubia; caracteres morfológicos; produção de mudas; massa de semente; propagação sexuada. AbstractCamu-camu (Myrciaria dubia) is a fruit species native to the Amazon and its economic importance is proven because the fruit contains high content of ascorbic acid. The objective of this work was to evaluate the germination and vigor of seedlings obtained from seeds of different sizes of two camu-camu populations. The experimental design was completely randomized in a factorial scheme of 2 x 3 (two provenances river Anauá and river Urubu and three seed sizes, small, medium and large) with 5 replicates of 20 seeds per plot. The seeds of the origin of the Anauá river presented higher mass (1.46 g) compared to the origin of the Urubu river (0.78 g). The speed and emergence of seed germination presented better values for the population of the Anauá river, justifying the adoption of choice of origin for the formation of seedlings. For root length, dry shoot mass and dry mass of the root system, the seeds classified as medium and large originated from the Anauá river presented higher values. The size of the seeds is an important character to be used in the production of Myrciaria dubia seedlings. The seeds of the origin of the Anauá river are potentially more vigorous are indicate for the production of camu-camu (Myrciaria dubia) seedlings.

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Water absorption and improvement of methods for electrical conductivity test in acacia seeds

Cited by 11 publications

References 18 publications

Emergency and Growth of Andiroba Seedlings (Carapa guianensis Aubl.) in Function of the Seeds

Emergency and Growth of Andiroba Seedlings (Carapa guianensis Aubl.) in Function of the Seeds

Storage, size and vigor of ‘Esther’ avocado seeds (Persea americana Mill.)

Influence of seed size on germination and vigor of seedlings of Camu-Camu

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