Germination and vigor of seeds of Magonia pubescens A. St.-Hil. submitted to storage and pre-imbibition in water

Arantes, Cárita Rodrigues de Aquino; Fava, Carmen Lúcia Ferreira; Camili, Elisângela Clarete; Scaramuzza, Walcylene Lacerda Matos Pereira

doi:10.1590/2317-1545v39n4170498

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Todavia mesmo apresentando teores próximos dos ideais de umidade, nota-se que as sementes que foram armazenadas acima de 60 meses perderam vigor, comprometendo sua germinabilidade. Segundo Arantes et al (2017), a redução na porcentagem de germinação no armazenamento, pode ocorrer devido a algum mecanismo de adaptação ao novo condição ambiental a que as sementes são submetidas. O armazenamento de sementes é mostrado como uma ferramenta importante para remediar possíveis deficiências na produção de sementes e mudas e, segundo Tonetto et al (2017), o período de preservação do potencial germinativo depende em grande parte do teor de água das sementes, condições e período de armazenamento.…”

Section: Discussionunclassified

TEMPO DE ARMAZENAMENTO E TEMPERATURA NO COMPORTAMENTO GERMINATIVO DE Schinopsis brasiliensis ENGLER

Brito¹,

Bezerra²,

Nunes³

et al. 2020

NAT

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A temperatura atua intimamente sobre a velocidade de absorção de água e igualmente sobre as reações bioquímicas que determinam tanto a velocidade e uniformidade de germinação. Por conseguinte, a viabilidade das sementes após períodos de armazenamento também pode ser um fator limitante no processo germinativo, minimizando o vigor. Diante disso, o presente trabalho teve como objetivo avaliar distintos períodos de armazenamento e temperaturas no comportamento germinativo de sementes de Schinopsis brasiliensis. O delineamento experimental adotado foi inteiramente casualizado, distribuídos em esquema fatorial 5x5, referentes a cinco tempos de armazenamento de sementes de S. brasiliensis armazenados em períodos distintos e cinco temperaturas constantes. Foram utilizados lotes de baraúna com período de armazenamento de 0, 12, 60, 72 e 84 meses, com quatro repetições. Calculou-se a percentagem de germinação, tempo médio de germinação, índice de velocidade de germinação, velocidade média de germinação e índice de Timson. Todos os parâmetros germinativos avaliados foram afetados significativamente. A viabilidade de sementes de S. brasiliensis é decrescida consideravelmente a partir de 12 meses de armazenamento. A temperatura e o tempo de armazenamento são fatores que influenciam diretamente o desenvolvimento inicial de sementes de S. brasiliensis. Palavras-chave: Anacardiaceae; germinação; espécies nativas; viabilidade; Caatinga. STORAGE TEMPERATURE TIME IN GERMINAL BEHAVIOR Schinopsis brasiliensis ENGLER ABSTRACT: The temperature acts closely on the speed of water absorption and also on the biochemical reactions that determine both the speed and uniformity of germination. Therefore, the viability of the seeds after storage periods can also be a limiting factor in the germination process, minimizing vigour. Therefore, this study aimed to evaluate different storage periods and temperatures in the germination behavior of seeds of Schinopsis brasiliensis. The experimental design adopted was entirely randomized, distributed in a 5x5 factorial scheme, referring to five lots of S. brasiliensis seeds stored in different periods and five constant temperatures. Barauna batches with storage periods of 0, 12, 60, 72 and 84 months were used, with four repetitions. The germination percentage, mean germination time, germination speed index and Timson index were calculated. All germination parameters evaluated were significantly affected. The viability of S. brasiliensis seeds is considerably decreased from 12 months of storage. Temperature and storage time are factors that directly influence the initial development of S. brasiliensis seeds. Keywords: Anacardiaceae; germination; native species; viability; Caatinga.

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Section: Discussionunclassified

TEMPO DE ARMAZENAMENTO E TEMPERATURA NO COMPORTAMENTO GERMINATIVO DE Schinopsis brasiliensis ENGLER

Brito¹,

Bezerra²,

Nunes³

et al. 2020

NAT

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“…The Tingui is an orthodox species (Consolaro et al, 2019). Its seeds have an average water content of 6% (Arantes et al, 2017). However, storage for up to 90 days is recommended, as it is after this period that the germination rate decreases and the seeds lose vigor (Jeromini et al, 2015).…”

Section: Transport Of Fungi Associated With Seedsmentioning

confidence: 99%

Etiology, transmission and pathogenicity of fungi associated with Cagaita (Eugenia dysenterica) and Tingui (Magonia pubescens)

Bruschet

Chagas

et al. 2022

RSD

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Cagaita (Eugenia dysenterica) and Tingui (Magona pubescens) are two species of trees native to the Cerrado, with sociological, economic, and medicinal importance, besides to being used in the recovery of degraded areas. The incidence of plant diseases, as well as the mycoflora associated with their seeds, may represent a possible threat to the survival of the species. The cultivation of trees in the Cerrado Biome, as well as the diseases associated with them, are still poorly studied. The present work aimed to evaluate the mycoflora associated with Cagaita and Tingui seeds, the transmission and pathogenicity of these fungi to plants. The seeds were collected from mother trees located in the municipality of Gurupi and Figueirópolis in the state of Tocantins, Brazil. The blotter-test method was used to evaluate the mycoflora associated with the seeds of both species, with and without asepsis. The fungal incidence per seed was evaluated with the aid of a stereoscopic and optical microscope. The potentially pathogenic fungi identified in the sanitary analysis of the seeds and in the transmission, test were inoculated in the plants in order to confirm Koch's postulates. The transmission test was carried out from non-disinfested seeds until the appearance of symptoms in the seedlings. A total of 11 fungi associated with the seeds of both species were identified. The genus Curvularia showed pathogenicity, causing spots on Cagaita leaves, being also transmitted from seeds to seedlings. The Fusarium genus showed pathogenicity in Tingui seedlings, causing damping-off and wilting. Colletotrichum sp. caused leaf spots on both species and fruit spots on Cagaita.

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Germination and vigor of seeds of Magonia pubescens A. St.-Hil. submitted to storage and pre-imbibition in water

Cited by 2 publications

References 14 publications

TEMPO DE ARMAZENAMENTO E TEMPERATURA NO COMPORTAMENTO GERMINATIVO DE Schinopsis brasiliensis ENGLER

TEMPO DE ARMAZENAMENTO E TEMPERATURA NO COMPORTAMENTO GERMINATIVO DE Schinopsis brasiliensis ENGLER

Etiology, transmission and pathogenicity of fungi associated with Cagaita (Eugenia dysenterica) and Tingui (Magonia pubescens)

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