Método de colheita e superação de dormência na qualidade fisiológica de sementes de Cassia ferruginea

Martins, Cibele Chalita; Machado, Carla Gomes; Martinelli-Seneme, Adriana; Zucareli, Claudemir

doi:10.5433/1679-0359.2012v33n2p491

Cited by 12 publications

(27 citation statements)

References 5 publications

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“…However, this seed dormancy overcoming procedure is very expensive and imposes some practical obstacles. In general, these compounds are very difficult to manage when a large number of seeds are submitted to this process, present the risk of accidents [9], [11], or even generate wounds to seed embryonic tissues [7], promoting abnormalities in seedlings [14]. Alternative methods, such as hot water treatment, are mentioned as not adequate to overcome S. tubulosa seed dormancy [10], [11].…”

Section: S Tubulosamentioning

confidence: 99%

“…Seed dormancy is characterized by seeds that even when exposed to favorable environmental conditions, such as light exposure, moisture, oxygen, and temperature, they do not germinate [7], [8]. Seed dormancy is a common problem in the seedling production of arborous trees, and especially frequent in the Fabaceae family [7], [9]- [11], being nocuous to the seedling production process because fast and uniform germinations are required [10].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical scarification, seed origin, and substrate influence on germination ofSamanea tubulosa

Regnier¹

2020

Preprint

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Samanea tubulosa is an important species mainly to its uses in reforestation projects and as a wood and fruit resource. This species seed dormancy and other scarce germination information have been limiting the adequate seedling production process. Thus, this study tried to understand how seed origin, mechanical scarification, and substrate could influence the seedling production process. The population affected the time required for germination and germination speed, probably due to high genetic variability. Whereas mechanical scarification did not present statistical differences in the control treatment, with seeds in the natural condition, indicating that seed dormancy could be variable. Substrate promoted significant differences in germination rate. The population seems to affect, but not preclude seedling production. Mechanical scarification did not provide a relevant enhancement of germination. Vermiculite presented a significantly higher germination rate than the organic-based substrate.

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Section: S Tubulosamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical scarification, seed origin, and substrate influence on germination ofSamanea tubulosa

Regnier¹

2020

Preprint

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“…In that sense, the substrate acts directly, due to its physical functions related to the structure, aeration, capacity to retain water, propensity to infestation by pathogens, among others (Martins et al, 2012). Santos and Aguiar (2000), when evaluating the germination of seeds of Sebastiania commersoniana due to the substrate and the temperature regimen, observed that the most adequate substrate was on sand, which offered maximal germination, at an alternating temperature of 20-30 °C.…”

Section: Introductionmentioning

confidence: 99%

“…There are several manners for the manifestation of dormancy and to determine the methods to overcome it, depending on the endogenous and exogenous dormancy methods. Biruel et al (2007) used a mechanical scarification to overcome the dormancy of seeds of Caesalpinia leiostachya, Oliveira et al (2012) used chemical and mechanical scarification to overcome the physical dormancy on seeds of Parkia gigantocarpa, Seneme et al (2012) and Alexandre et al (2015) used physical and chemical treatments on seeds of Peltophorum dubium and Enterolobium contortisiliquum, respectively. In addition, methods such as immersion on hot water (Azeredo et al, 2010) and the use of hormones, such as gibberellic acid, may also be used (Campos et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Biometry and germination of Balfourodendron riedelianum Eng. Eng.

et al. 2016

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-This study investigated the biometry, pre-germination treatments and substrates for the germination of diaspores of Balfourodendron riedelianum. The diaspores were characterized during germination according to their length, width, thickness, thousand kernel weight (TKW) and water content. Dormancy overcoming was tested by diaspore scarifying with sandpaper, sulfuric acid immersion, water and water at 100 °C; together with the control (untreated), they were associated to different substrates (including paper (EP), sand (EA) and vermiculite (EV). Germination tests were conducted in a germination chamber at 25 °C. The physiological quality of seeds was performed through the first count, germination and germination speed index (GSI). Biometric data were analyzed in frequency classes and the pre-germination treatment by analysis of variance. Diaspores are on average 18.59 mm long; 9.03 mm wide and 9.38 mm thick. The treatment of immersion in cold water for 48 hours and the substrate vermiculite (EV) were effective to overcome dormancy and recommended for germination tests.Index terms: seed analysis, morphology, dormancy, forest species.Biometria e germinação de Balfourodendron riedelianum Eng. Eng.RESUMO -O presente trabalho objetivou estudar a biometria, tratamentos pré-germinativos e substratos para germinação de diásporos de Balfourodendron riedelianum. Os diásporos foram caracterizados na germinação quanto ao comprimento, largura, espessura, peso de mil sementes (PMS) e teor de água. Foram empregados os métodos de escarificação com lixa e ácido sulfúrico, imersão em água fria e em água a 100 °C, e o controle (sem tratamento), associados a diferentes substratos (entre papel (EP), entre areia (EA) e, entre vermiculita (EV), sendo conduzidos em câmara de germinação a 25 °C. A caracterização fisiológica foi realizada por meio da primeira contagem, germinação e índice de velocidade de germinação (IVG). Os dados biométricos foram analisados em classes de frequências e os tratamentos pré-germinativos por meio da análise de variância. Os diásporos apresentam em média 18,59 mm de comprimento; 9,03 mm de largura e 9,38 mm de espessura. O tratamento de imersão em água fria por 48 horas e o substrato entre vermiculita (EV) foi efetivo para a superação da dormência e o mais adequado para o teste de germinação da espécie.Termos para indexação: análise de sementes, morfometria, dormência, espécie florestal.

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“…also have dormancy (Rodrigues et al, 2008), specially related to the impermeability of the coat (Martins et al, 2012). However, there are available treatments to overcome this kind of dormancy in Acacia spp., but the proper moment of application, the recommended temperature and the most efficient pre-germinative treatments depend on the species (Martins et al, 2008).…”

mentioning

confidence: 99%

Temperature and pre-germinative treatments for overcoming Acacia farnesiana (L.) Willd. (Fabaceae) seeds dormancy

Paulo¹,

Edna²,

Antonio³

et al. 2016

Afr. J. Agric. Res.

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Acacia farnesiana L. is a species known for its uses in recovery of degraded pastures, animal feeding, medical and fungicide properties. However, it is one of the most problematic invasive species in agriculture, due to the little known dormancy aspects of its seeds that results in the propagation and dispersion to distinct areas and the establishment of the invasive plant. The knowledge on ecophysiological characteristics of invasive species seeds aiming at the dormancy process is important for the comprehension of aggressive regeneration unities, and allows the development of strategies against infestation of new areas and reduction of soil seed banks. The objective of this research was to assess how A. farnesiana seeds overcome dormancy using different temperatures and pre-germinative treatments. The study was conducted in Federal University of Paraiba, using seeds obtained from fruits of ten matrix trees in Paraiba State, Brazil. The completely randomized design was adopted, with treatments arranged in a 3 x 15 factorial scheme representing temperatures and pregerminative treatments with four replicates. Parameters related to germination percentage, germination and emergency index were assessed, with best results observed in seeds scarified with sandpaper 80 followed by imbibitions of water at environmental temperature (25-30°C) for 24 h.

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Método de colheita e superação de dormência na qualidade fisiológica de sementes de Cassia ferruginea

Cited by 12 publications

References 5 publications

Mechanical scarification, seed origin, and substrate influence on germination ofSamanea tubulosa

Mechanical scarification, seed origin, and substrate influence on germination ofSamanea tubulosa

Biometry and germination of Balfourodendron riedelianum Eng. Eng.

Temperature and pre-germinative treatments for overcoming Acacia farnesiana (L.) Willd. (Fabaceae) seeds dormancy

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