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

Silva, Rosemeire Carvalho da; Vieira, Elisa Serra Negra; Panobianco, Maristela

doi:10.1590/s0100-204x2018000200010

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…As shown in Figure 1A, the layer below the endocarp is constituted by a membranous brown plant tissue, constituting the seed coat (Silva et al, 2018). This seed coat is encompassed by vascular bundles that branch off to one extremity, and are thus called chalazal (i.e., the region of the chalaza) vascular bundles, that join by proceeding from around the seed to the opposite extremity, characterized as the hilum-micropyle region (Almeida et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess

et al. 2019

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Calophyllum brasiliense Cambess. (guanandi) is a native species with medicinal potential and also generates expectation for commercial use (wood) and for recovery of degraded areas. These seeds have physical and mechanical dormancy, requiring techniques for dormancy release; knowledge of seed and seedling morphology that assists laboratory analysis and propagation of the species is also necessary. The objective of this study was to describe the morphological structures of the seeds and normal and abnormal seedlings of guanandi, and also investigate if complete extraction of the endocarp and the seed coat to overcome dormancy will affect the morphology and initial plant development, and consequently production of transplants. Guanandi seeds are large (1000 seed weight of 1480.9 g) with a hard seed coat; cotyledons account for most of the embryo and serve as a reserve; the embryonic axis is small (1.0-2.0 mm) in relation to the seed, yet it is differentiated. The seedlings have hypogeal cryptocotylar germination, with cotyledonary petioles, taproot, and epicotyl developing into a long stem and a tip protected by cataphylls. The main abnormalities in seedlings are related to the root system. Extraction of the endocarp and seed coat does not alter the morphology of seedlings and promotes their greater development, which may be an advantageous strategy.

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Section: Resultsmentioning

confidence: 99%

Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess

et al. 2019

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“…When harvest is carried out at an inadequate moment, there is a significant reduction in seed quality, besides resulting in quantitative losses (Barroso et al, 2022). In recalcitrant seeds, such as those of C. gigantifolia (Ferreira et al, 2021), which have shorter longevity due to their inability to tolerate water losses, this may be even more significant (Silva et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Emergence of Coccoloba gigantifolia Melo, Cid Ferreira & Gribel seedlings as a function of raceme and fruit maturation

2023

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Coccoloba gigantifolia fruits show uneven maturation within each raceme, which can affect the quality of the seeds. This study aimed to characterize racemes, fruits, and seeds, after harvest, and evaluate the physiological performance of the seeds as a function of the fruit maturation stage. After characterization, two experiments were set up. In the first, a completely randomized design was used, in a 4 (racemes) x 4 (fruit maturation stages: green, half-green, red, and purple) factorial scheme, with 4 replications. In the second, a randomized block design was adopted, in a 4 (fruit maturation stages) x 2 (with and without seed drying) factorial scheme, with 4 replications. Fruit maturation occurs progressively within each raceme, with fruits from completely green to completely purple in color existing at the same time. In propagation, preference should be given to harvesting racemes with a greater number of fruits in the half-green, red, and purple stages, since seeds from green fruits have low physiological quality. In addition to the variation in emergence as a function of fruit maturation, the seeds of the different racemes also showed different behaviors, which seems to be associated with different levels of seed dormancy.

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“…Among the most reliable methods is the low-temperature oven at 101-105 °C/17 h, indicated in the Rules for Seed Testing (RST) since it is a basic method for the introduction of new species (BRASIL, 2009); it was also adopted by the International Rules for Seed Testing (ISTA, 2015). In the case of guanandi seeds, which are considered large and high in moisture content, the recommendation of the method involves cutting the seeds into fragments that are smaller than 7.0 mm, in a short exposure time (four minutes) of the material to the environment, considering that guanandi seeds have a rigid endocarp SILVA et al, 2018), which hinders the rapid fragmentation and exposure of the material to the indicated time limit.…”

Section: Introductionmentioning

confidence: 99%

Determination of Moisture Content and Storage Potential of Guanandi Seeds

Silva

Grzybowski

Belniaki

et al. 2019

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ResumoDeterminação do teor de água e do potencial de armazenamento de sementes de guanandi. O guanandi é uma espécie florestal nativa com particularidades que dificultam o armazenamento das sementes, pelo seu comportamento recalcitrante e por não haver protocolo específico e prático para determinação do teor de água da semente. O trabalho teve por objetivo testar procedimentos para determinação do teor de água e estudar diferentes condições de armazenamento das sementes de guanandi. Para a determinação do teor de água utilizou-se o método estufa a baixa temperatura 101 -105 °C, testando-se formas de preparo da semente (íntegras, cortadas ao meio e fragmentos menores que 7,0 mm) e diferentes períodos de secagem. Para o armazenamento das sementes testaram-se quatro ambientes (câmara úmida, câmara seca, refrigerador e ambiente de laboratório), com dois tipos de embalagens, durante quatro períodos (0, 1, 2, 3 e 4 meses). Para análise estatística, um delineamento inteiramente casualizado, em esquema fatorial, foi utilizado para teor de água; de parcelas subdivididas para armazenamento. Realizou-se análise de regressão para avaliação do potencial fisiológico e teor de água durante o armazenamento, com ajuste da equação significativa pelo teste de Tukey. Pelos resultados obtidos observou-se que o método da estufa a baixa temperatura 101 -105 °C / 17 h, utilizando-se sementes íntegras, deve ser utilizado para a determinação do teor de água das sementes de guanandi. A melhor combinação entre ambiente e embalagem para armazenamento das sementes foi condição de ambiente de laboratório (média entre 19,6 -23,1 °C e UR 53 -62%) em embalagem de polietileno. Palavras-chave: Calophyllum brasiliense, conservação, recalcitrante, método da estufa. AbstractGuanandi is a native forest species with particularities that make it difficult to store of seeds, because of its recalcitrant behavior and since a specific and practical protocol to determine the moisture content of its seeds is not available yet. This work had the purpose to test procedures to determine the moisture content and to study different environmental conditions of the storage of the guanandi seeds. In order to determine the moisture content, the low-temperature oven method at 101 -105°C was used, testing seed preparation methods (intact, cut in half and fragments smaller than 7.0 mm) and different drying periods. Four environments (wet chamber, dry chamber, cooler and laboratory environment) were tested for the storage of the seeds, with two packaging types, during four periods (0, 1, 2, 3 and 4 months). For the statistical analysis, a completely randomized design, with a factorial arrangement, was used for moisture content; a split-split plot design was used for storage. A regression analysis was performed to evaluate the physiological potential and moisture content during the storage, adjusting the significant equation by Tukey's test. From the obtained results, it was observed that the low-temperature oven method 101 -105°C / 17 h, using intact seeds, should be used ...

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

Cited by 5 publications

References 17 publications

Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess

Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess

Emergence of Coccoloba gigantifolia Melo, Cid Ferreira & Gribel seedlings as a function of raceme and fruit maturation

Determination of Moisture Content and Storage Potential of Guanandi Seeds

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