Detecção de fungos em sementes de pau-brasil (Caesalpinia echinata) coletadas durante sua formação e dispersão

Padulla, Tathiana Lisbôa; Moraes, Maria Heloísa Duarte de; Barbedo, Claudio José; Borges, Igor Ferrari; Menten, José Otávio Machado; Pascholati, Sérgio Florentino

doi:10.1590/s0101-31222010000200019

Cited by 6 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…and Aspergillus sp. (PADULLA et al, 2010;LAZAROTTO et al, 2010). The mean values of the physiological potential of the whipshorse seeds are given in Table 3.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Health and transmission of fungi associated with seeds of Luehea divaricata

Quevedo

Muniz

Walker

et al. 2020

AGRO@MBIENTE ON-LINE

View full text Add to dashboard Cite

Research related to the pathology of seeds of native forest species, açoita-cavalo (Luehea divaricata), is scarce. This study aimed to evaluate the sanitary and physiological quality of whipshorse seeds and the possible transmission of fungi associated with the seeds to the seedlings, in lots from Santa Maria - RS. Were 100 seeds used, divided into four repetitions of 25 per lot (2016 and 2018) and test. The health test was carried out in which the seeds without asepsis were placed in “gerbox” boxes with filter paper substrate at a temperature of 25 °C, with a photoperiod of 12 h for seven days. The germination test and the fungi transmission test seeds were conducted in a germination room at a temperature of 25 ºC, and a photoperiod of 12 h. Only the seeds used in the germination test underwent asepsis. The evaluations of the two tests consisted of the First Germination Count (at 14 days) and the count in the number of normal, abnormal seedlings, and non-germinated seeds (at 28 days). In the health test, fungi were identified and quantified: Fusarium sp., Alternaria sp., Aspergillus sp., Penicillium sp., Rhizopus sp., Cladosporium sp., Pestalotia sp. and Epicoccum sp. The Fusarium genus was identified associated with the symptoms of browning and rotting in seedling roots in the transmission test. The sample from 2018 showed greater vigor, reaching 21% at 14 days, not different from the lot of 2016 that reached 10%. The lot of 2018 presented the best results concerning health, vigor, and germination.

show abstract

“…and Aspergillus sp. (PADULLA et al, 2010;LAZAROTTO et al, 2010). The mean values of the physiological potential of the whipshorse seeds are given in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…e Aspergillus sp. (PADULLA et al, 2010;LAZAROTTO et al, 2010). Os valores médios do potencial fisiológico das sementes de açoita-cavalo são apresentados na Tabela 3.…”

Section: Resultsunclassified

Health and transmission of fungi associated with seeds of Luehea divaricata

Quevedo

Muniz

Walker

et al. 2020

AGRO@MBIENTE ON-LINE

View full text Add to dashboard Cite

show abstract

“…Initially, the lifespan of those seeds was considered short, tolerating no more than three months in natural storage ( Barbedo et al 2002). Later, important advances were obtained with the application of suitable techniques, such as the harvest at the physiological maturity point (Borges et al 2005), the control of drying (MartiniNeto & Barbedo 2015) and the storage, including the freezing (Hellmann et al 2006), fungus control (Lisbôa- Padulla et al 2009, Padulla et al 2010 and monitoring the chemical composition changes (Garcia et al 2006, Borges et al 2006, Hellmann et al 2008, Mello et al 2011, extending storage for up to five years (Mello et al 2013). However, this storage period is not enough to allow its inclusion in germplasm banks.…”

Section: Resultsmentioning

confidence: 99%

Deterioration rates of brazilwood seeds (Caesalpinia echinata Lam.) under high temperatures

Santos

Barbedo

2017

Hoehnea

Self Cite

View full text Add to dashboard Cite

-(Deterioration rates of brazilwood seeds (Caesalpinia echinata Lam.) under high temperatures). Caesalpinia echinata seeds deteriorate in less than three months at ambient temperature, although they can remain viable for up to five years when kept under freezing temperatures. We studied the deterioration of brazilwood seeds when submitted to different conditions of temperature and humidity aiming to check the applicability of mathematical models for predicting loss of viability of those seeds. The results showed that the high temperatures preconized for the rapid deterioration and simulation of storability produced an irregular behavior, suggesting that the deteriorative metabolism of these seeds may not correspond to the metabolism during the natural storage. Applying the equations, seeds with 8% water content stored at 7 °C could be stored for five years, while the literature shows that these seeds would not tolerate more than a year. On the other hand, the prediction of storage with 10% of water content at -18 °C would be, by these equations, 128 years, while the literature shows that seeds under these conditions would lose viability in less than ten years. The results showed that the current models might present restrictions on their application, depending on the species and conditions. Keywords: predictability equation, seed conservation, viability RESUMO -(Taxas de deterioração de sementes de pau-brasil (Caesalpinia echinata Lam.) sob elevadas temperaturas). As sementes de Caesalpinia echinata deterioram-se em menos de três meses em temperatura ambiente, embora possam permanecer viáveis por até cinco anos quando mantidas sob congelamento. Estudou-se a deterioração das sementes de pau-brasil quando submetidas a diferentes condições de temperatura e umidade visando a verificar a aplicabilidade de modelos matemáticos para prever a perda de viabilidade dessas sementes. Os resultados mostraram que as altas temperaturas preconizadas para a rápida deterioração e a simulação de armazenagem produziram um comportamento irregular, sugerindo que o metabolismo deteriorativo dessas sementes pode não corresponder ao metabolismo durante o armazenamento natural. Aplicando-se as equações, as sementes com 8% de teor de água armazenadas a 7 °C poderiam ser armazenadas por cinco anos, enquanto a literatura mostra que essas sementes não tolerariam mais de um ano. Por outro lado, a previsão de armazenamento de sementes de pau-brasil com 10% de teor de água a -18°C seria, por essas equações, de 128 anos, enquanto a literatura mostra que as sementes nessas condições perderiam viabilidade em menos de dez anos. Os resultados mostraram que os modelos atuais podem apresentar restrições à sua aplicação, dependendo das espécies e condições. Palavras-chave: conservação de sementes, equação de previsibilidade, viabilidade 1. Parte da Dissertação de Mestrado do primeiro Autor 2.

show abstract

“…Pathogenicity studies from seed isolates have been occurring even in forest species OLIVEIRA, 2006;BOTELHO et al, 2008;BENETTI et al, 2009;LISBÔA-PADULLA et al, 2010;LAZAROTTO et al, 2010;REGO et al, 2012), verifying that the damages, derived from the diseases transmitted by seeds in these species, occur mainly during the stages of germination and/or in the formation of seedlings in the nurseries (CARNEIRO, 1987). Nonetheless, there is no information of this nature available, associated to passion fruit culture.…”

Section: Pathogenicity and Transmission Of Fungi Detected Onmentioning

confidence: 97%

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

et al. 2018

View full text Add to dashboard Cite

Passion fruit is usually propagated by seeds because of the ease and lower cost in seedling production. However, the seed is the most efficient agent for the spread of pathogens. The damages from seed-borne diseases occur mainly during the germination stages or at the formation of seedlings in nurseries. Considering the need for knowledge on the pathology of sweet passion fruit seeds, the objective was to evaluate the transmission and pathogenicity of the fungi Alternaria sp., Botrytis fabae, Cladosporium cladosporioides, Fusarium spp. and Lasiodiplodia theobromae, known as potentially pathogenic to this crop, and isolated from sweet passion fruit seeds. Therefore, tests on seed health, germination and seedling emergence in a sterilized commercial substrate were conducted using seeds from this species, inoculated with those fungal isolates. Leaves, stems and fruit from this plant were also inoculated with the same fungi. Alternaria sp., Fusarium spp. and L. theobromae were identified in seedlings obtained from inoculated seeds, confirming the transmission of these fungi by seeds. L. theobromae was also considered the most harmful fungus to passion fruit crop, as it causes seed rot and other disease symptoms on the leaves, stem and fruit. These findings inferred that healthy seeds of sweet passion fruit are essential for producing seedlings and to prevent the spread of the diseases caused by these fungi to exempt areas.

show abstract

Detecção de fungos em sementes de pau-brasil (Caesalpinia echinata) coletadas durante sua formação e dispersão

Cited by 6 publications

References 8 publications

Health and transmission of fungi associated with seeds of Luehea divaricata

Health and transmission of fungi associated with seeds of Luehea divaricata

Deterioration rates of brazilwood seeds (Caesalpinia echinata Lam.) under high temperatures

Pathogenicity and transmission of fungi detected on Passiflora alata seeds

Contact Info

Product

Resources

About