Associação de Fungos com Sementes de Espécies Florestais Nativas

Carmo, Ana Lídia Moura do; Mazaratto, Edson José; Eckstein, Bárbara; Santos, Á. F. dos

doi:10.1590/0100-5405/2211

Cited by 13 publications

(11 citation statements)

References 3 publications

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“…The demand for seeds of native forest species has increased in recent years (Carmo et al, 2017). An effective alternative to supply improved seeds for grow traits and that are genetically variable is the transformation of provenance and progeny tests into seed orchards (Rocha et al, 2009;Canuto et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Genetic control of silvicultural traits in Balfourodendron riedelianum (ENGL.) ENGL.

et al. 2019

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The Atlantic Forest has very high levels of biodiversity and is considered one of the most important and threatened biomes in the world. Balfourodendron riedelianum is one of the forest’s characteristic tree species that is currently under considered endangered due to timber extraction and forest fragmentation. With the goal of generating information that may contribute to the genetic conservation of B. riedelianum, genetic parameters are estimated for quantitative traits important for silviculture in a provenance and progeny test located in the Experimental Station of Luiz Antônio, São Paulo State, Brazil. The test was established in 1986 and consists of three provenances, from which open-pollinated seeds from 19 seed trees were collected. The following traits were evaluated at 32 years of age: diameter at breast height (DBH), total height (H), stem height (SH), stem straightness (SS), and forking (FOR). The estimates were carried out using the REML/BLUP method. Significant genetic variation among progenies was detected for all traits (except SH) and between provenances for DBH. The coefficient of individual genetic variation (CVgi) ranged from 2.5 to 9.5 %. The mean heritability among progeny ( $h_f^2$ ) was substantial for DBH (0.44) and FOR (0.36), enabling the selection of families with the highest DBH and lowest FOR for population improvement. Genotypic and phenotypic correlations among traits were also found. We conclude that there is genetic variability in the population that can be exploited in future breeding programs and for the genetic conservation of the species.

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Section: Introductionmentioning

confidence: 99%

Genetic control of silvicultural traits in Balfourodendron riedelianum (ENGL.) ENGL.

et al. 2019

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“…Using the same test, the fungus Colletotrichum sp., agent of anthracnosis in several forest species (Carmo, et al, 2017), was observed in the A. graveolens and B. forficata seeds. These fungi are essentially dependent on high humidity (Alfenas et al, 2009), due to this, their preference for this method, where the seeds are in direct contact with the culture medium.…”

Section: Resultsmentioning

confidence: 98%

Methods to detect fungi in seeds of the Austronium graveolens, Bauhinia forficata and Cordia trichotoma (Vell.)

Bernardi

Rey

Wagner

et al. 2020

RSD

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The importance of native forest seeds, free of phytopathogens, is a strategy for the implantation of quality forest plantations. The scarcity of information about the health conditions of seeds of native forest species causes the spread of diseases. The objective of this work was to determine a method of sanitary analysis to identify pathogens in seeds of the species of Austronium graveolens, Bauhinia forficata and Cordia trichotoma (Vell.). The treatments consisted of filter paper methods with and without disinfestation in the periods of seven and 15 days, 15 days with water restriction, with BDA medium by seven and 15 days and BDA medium with water restriction during 15 days. For each test, it was used 400 seeds. The results showed that for each forest specie seeds the best detection method was in a Petri dish with culture medium and seed disinfestation, the Austronium graveolens and Bauhinia forficata seeds need an incubation period of 15 days with water restriction and Cordia trichotoma (Vell.) seeds of seven days.

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“…Os fungos Aspergillus sp., Penicillium sp., Trichoderma sp. são saprófitas (CARMO et al, 2017). Em trabalhos semelhantes, Aspergillus flavus, A. niger, Penicillium griseofulvum, Penicillium sp.…”

Section: Resultsunclassified

Efeitos de rizobactérias na promoção de crescimento e controle de fitopatógenos em sementes de paricá

Pereira¹,

Andrade²,

Nunes³

et al. 2020

RICA

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O paricá (Schizolobium amazonicum Huber ex Ducke) é considerado uma espécie de grande potencial para produção madeireira, pelo seu rápido crescimento, excelente adaptabilidade e pela qualidade da madeira. Porém, pouco se conhece a respeito do seu desenvolvimento utilizando rizobactérias na fase de mudas oriundas de sementes. Diante disso, objetivo deste trabalho foi avaliar o controle de patógenos em sementes de paricá e a promoção de crescimento induzidas por rizobactérias. Deste modo, utilizou-se dois isolados de rizobactérias promotoras do crescimento de plantas, Pseudomonas sp. e Burkholderia sp..O experimento foi conduzido no Laboratório de Microbiologia e Saúde e em casa de vegetação da Universidade Estadual da Região Tocantina do Maranhão. O delineamento experimental utilizado foi inteiramente casualizado, com quatro tratamentos e cinco repetições. Os tratamentos testados foram: sementes não microbiolizada (T1); sementes microbiolizadas com Pseudomonas sp. (T2); sementes microbiolizadas com Burkholderia sp. (T3); sementes microbiolizadas com Pseudomonas sp. e Burkholderia sp. (T4). Para o teste de sanidade de sementes foram usadas 400 sementes para análise de fitopatógenos, enquanto que para o teste in vitro foram usadas 200 sementes submetidas a microbiolização com as rizobactérias. Em casa de vegetação foram utilizadas 200 sementes, e as amostras foram analisadas quanto a germinação com 10, 20 e 30 dias, altura de plantas, comprimento radicular, diâmetro basal, biomassa fresca da parte aérea e da raiz e biomassa seca da parte aérea e da raiz com 30 dias. Foram identificadas as espécies fúngicas: Penicillium sp., Aspergillus flavus, A. glaucus, A. niger, e Trichoderma sp. O tratamento T4 apresentou eficiência na redução total da incidência fúngica nas sementes de paricá. Foram constatadas correlações positivas entre o parâmetro controle de fitopatógenos em sementes de paricá e uso de rizobactérias, conquanto em casa de vegetação a inoculação de rizobactérias não promoveu significativamente o crescimento das plântulas.

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Associação de Fungos com Sementes de Espécies Florestais Nativas

Cited by 13 publications

References 3 publications

Genetic control of silvicultural traits in Balfourodendron riedelianum (ENGL.) ENGL.

Genetic control of silvicultural traits in Balfourodendron riedelianum (ENGL.) ENGL.

Methods to detect fungi in seeds of the Austronium graveolens, Bauhinia forficata and Cordia trichotoma (Vell.)

Efeitos de rizobactérias na promoção de crescimento e controle de fitopatógenos em sementes de paricá

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