Avaliação Da Qualidade Fisiológica De Sementes Florestais Através Do Teste De Condutividade Elétrica

Guollo, Karina; Possenti, Jean Carlo; Felippi, Marciele; Quiqui, Erci Marcos Del; Loiola, Táscilla Magalhães

doi:10.5747/ca.2017.v13.n1.a153

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…The seeds that showed the highest RNA deterioration were the same as the ones with the highest EC values. A significant correlation between the germination test and EC has been reported, which is an alternative for a quick assessment of the physiological quality of the seeds (Guollo et al, 2017). Those seeds that are in an advanced deterioration process may have failures or slow cell membrane repair speed during water retention for germination (Beedi et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Seed Longevity of Enterolobium contortisiliquum (Vell.) Morong

et al. 2020

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Seed storage under controlled temperature and humidity maintains the viability and the vigor of seeds for a long time while preserving their longevity. Ex situ conservation in a seed storage chamber is perfect for simulating the cool dry conditions that are associated with long-term seed storage. This helps to preserve the availability of seeds for the recovery of degraded areas and to ensure a supply of propagating material for various purposes in silvicultural production, or as raw materials for biotechnological use. The present work evaluated the physical and physiological quality of Enterolobium contortisiliquum (Vell.) Morong seeds from an ex situ collection that was kept in a seed storage chamber at 6 °C ± 3 °C and with 60% ± 5% of RH in waterproof packaging. The water content, the physical quality by X-ray tests, germination, electrical conductivity, and the integrity and quality of RNA that was extracted from the embryonic axes were all determined. It was possible to identify full, damaged, malformed, translucent, and empty seeds. The seeds that had been stored for 1, 5, 9, and 10 years presented 78, 82, 42, and 38% of normal seedlings, respectively, while the lots of 6 and 7 years presented 0 and 6%. The seed storage conditions were the same for all of the lots. A water content higher than 6% influenced the quality of the seeds. The E. contortisiliquum seeds demonstrated high longevity. They could be stored for up to 10 years under controlled conditions.

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Section: Resultsmentioning

confidence: 99%

Seed Longevity of Enterolobium contortisiliquum (Vell.) Morong

et al. 2020

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“…Several factors besides the seed imbibition period may have an influence on the results of the EC test, which can be cited: water quality and temperature, test environment temperature, seed water content, number of seeds used for seed test, genotype, the equipment used to read the EC, the presence of mechanical damages and injuries in the seeds and the age of the seeds (DIAS; MARCOS FILHO 1996;GASPAR;NAKAGAWA, 2002;MARCHI;CICERO, 2002). Guollo et al (2017) report that it is possible to infer that EC tests should be established specifically for each species, due to the differences found between them. There are variations in the absorption capacity for each type of seed, due to its shape, size and functionality of the pores, control of water exchange, waxy material that constitutes the epidermis of the integument and the degree of adhesion of the forehead to the cotyledon.…”

Section: Resultsmentioning

confidence: 99%

“…From the individual EC test, seed quality can be determined through viability and vigor, which represent different attributes of the seed (GUOLLO et al, 2017). According to Steere et al (1981), the individual EC test was created to correct problems in performing the mass EC test with damaged or hard seeds, which present variations in the leaching capacity.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, it is important to mention that the individual EC test is primordial with regard to establishing seed methodologies, due to the fact that through it is possible to prove the alterations of the reading in different conditions found in the seeds. However, there are few studies of individual EC related to forest seeds (GUOLLO et al, 2017). It is also understood that the fact that the seeds had been obtained from bird feces, the evaluation of the individual EC will contribute to the understanding of the physiological behavior of the forest seeds through ornithochoric dispersion.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of the electrical conductivity of forest seeds after digestive tract of wild birds

Filho

Franco

Jorge

et al. 2018

CeN

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The production of seedlings encompasses the need for knowledge of plant physiology, mainly related to seeds and their minutiae. The seed is the vehicle that carries the full genetic potential of a cultivar with superior characteristics. Vigor can be described as that seed property that determines its emergence under unfavorable conditions. According to the International Seed Testing Association (ISTA). The process of reforestation can happen through the production of seedlings and, through seed dispersal, this can occur due to the action of the plant itself (autochory), water (hydrochory), wind (anemochory), animals (zoochory), etc. The current work aimed to investigate the feasibility of using the individual electrical conductivity test to evaluate the physiological quality of seeds of forest species after passage through the digestive tract of wild birds. The results allowed inferring that the forest seeds after digestive tract of wild birds presented low electrical conductivity at the individual level. Thus, the seeds in study no presented loss force after digestive tract of wild birds. Therefore, the birds only performed the role of individual dispersant. Resumo A produção de mudas engloba a necessidade de conhecimento da fisiologia vegetal, principalmente relacionada às sementes e suas minúcias. A semente é o veículo que carrega todo o potencial genético de uma cultivar com características superiores. O vigor pode ser descrito como aquela propriedade da semente que determina sua emergência sob condições desfavoráveis. De acordo com a Associação Internacional de Testes de Sementes (ISTA). O processo dereflorestamento pode acontecer através da produção de mudas e, através da dispersão de sementes, isso pode ocorrer devido à ação da própria planta (autocoria), água (hidrocoria), vento (anemocoria), animais (zoocoria), etc. O presente trabalho teve como objetivo investigar a viabilidade do uso do teste de condutividade elétrica individual para avaliar a qualidade fisiológica de sementes de espécies florestais após passagem pelo trato digestório de aves silvestres. Os resultados permitiram inferir que as sementes da floresta após o trato digestivo das aves silvestres apresentaram baixa condutividade elétrica no nível individual. Assim, as sementes em estudo não apresentaram perda de vigor após o trato digestório das aves silvestres. Portanto, as aves só desempenharam o papel de dispersor individual.

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“…In the field, drying was carried out with filter paper with a temperature of approximately 30-35 ºC for 30 min. For conduct the Electrical Conductivity (EC) test, the recommendations proposed by Krzyzanowski et al (1999), Flavio and Paula (2010), Guollo et al (2017) and Thode-Filho (2018) was followed with adaptations. The experimental design was completely randomized with one treatments with five replicates.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the seedvigor of <i>Tournefortia paniculata Cham.</i> post-digestive tract of the ruby-crowned tanager <i>Tachyphonus coronatus</i> (Vieillot, 1822)

Filho

Franco

Jorge

et al. 2019

CeN

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Endozoochory (dispersion with passage through the digestive system of animals) is one of the most important processes. It is included in the ecological process known as dispersive mutualism, benefit the species involved. The most used method to evaluate the physiological quality of seeds is carried out based on the traditional germination test. However, electrical conductivity tests with seeds of forest species are still scarce, especially those developed with the individual method, which provide greater fidelity to the results so that through this one can define the test by the mass methods. The current work aimed to investigate the vigor, from the electrical conductivity of the seeds of Tournefortia paniculata Cham. after passage through the digestive tract of a ruby-crowned tanager Tachyphonus coronatus (Vieillot, 1822). An expedition was conducted in a fragmented area of Atlantic Forest in process of reforestation in the campus of the IFRJ. After the capture of the passerine with mist nets, proceeded the identification of seeds shed in its feces. The experimental design was completely randomized with one treatments with five replicates. The results allowed concluded that the seed of the T. paniculata Cham. after digestive tract of the ruby-crowned tanager presented high electrical conductivity in three of its replicates at the individual level.

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Avaliação Da Qualidade Fisiológica De Sementes Florestais Através Do Teste De Condutividade Elétrica

Cited by 7 publications

References 7 publications

Seed Longevity of Enterolobium contortisiliquum (Vell.) Morong

Seed Longevity of Enterolobium contortisiliquum (Vell.) Morong

Evaluation of the electrical conductivity of forest seeds after digestive tract of wild birds

Evaluation of the seedvigor of <i>Tournefortia paniculata Cham.</i> post-digestive tract of the ruby-crowned tanager <i>Tachyphonus coronatus</i> (Vieillot, 1822)

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