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Pseudomonas fluorescentes associadas à olerícolas sob sistema de produção orgânico.

Zago, Valéria Cristina Palmeira; De-Polli, Helvécio and Rumjanek, Norma Gouvêa (2011) Pseudomonas fluorescentes associadas à olerícolas sob sistema de produção orgânico. [Fluorescent pseudomonads associated with vegetables under organic practices.] Revista Brasileira de Agroecologia, 6 (2), pp. 123-133.

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Document available online at: http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/article/view/9938/pdf


Summary

Avaliou-se a diversidade de populações de Pseudomonas spp. fluorescentes associadas à alface, cenoura e pepino, cultivados em sistema orgânico. O delineamento experimental foi de blocos inteiramente casualizados, com três repetições. Foi incorporado ao solo anterior ao plantio, 20 t/ha de esterco bovino curtido e 1,5 t/ha de termofosfato. As amostras de solo foram separadas em ectorizosfera, rizoplano, endorizosfera e filoplano por olerícola. Os isolados bacterianos que apresentaram fluorescência sob luz UV foram selecionados e caracterizados conforme a morfologia de suas colônias, sendo que um isolado, de cada um dos grupos mais representativos quantitativamente, foi identificado pelo Sistema API 20NE. Foram selecionados 25 isolados, identificados como P. putida, das culturas de alface e cenoura para caracterização por RAPD. A análise fenotípica permitiu a identificação de alguns grupos de isolados associados à alface, cenoura e pepino. Existe uma alta diversidade de estirpes, revelada pela caracterização fenotípica e genotípica, associada às olerícolas estudadas, sob sistema orgânico de produção.


Summary translation

Diversity of fluorescent pseudomonads associated with lettuce, carrot and cucumber under organic practices was studied. The experimental design was random blocks, with three replicates. Prior to planting, 20 t/ha of cattle manure and 1,5 t/ha of thermophosphate were applied to the soil. Soil samples were separated into rhizosphere, rhizoplane, roots and phylloplane of the crops. Bacterial isolates which presented fluorescence under UV light were selected. These isolates were classified accordingly to their colony morphology. One isolate from one of the quantitatively most representative groups was identified by the API 20 NE system. Twenty-five isolates were selected, identified as P. putida, from ectorhizosphere, rhizoplane, phylloplane e endorhizosphere of the three plant species for RAPD characterization. The phenotypic analysis allowed the identification of certain groups of isolates associated with lettuce, carrot and cucumber. There is a high diversity of strains, revealed by genotypic and phenotypic characterization, associated with vegetables studied under organic production system.

EPrint Type:Journal paper
Keywords:Pseudomonas spp, Probióticos de plantas, Adubação, Diversidade genética. Pseudomonas spp, Plant probiotics, Organic fertilization, Diversity.
Agrovoc keywords:
Language
Value
URI
English
Organic agriculture
http://aims.fao.org/aos/agrovoc/c_15911
English
Pseudomonas
http://aims.fao.org/aos/agrovoc/c_6304
English
Organic fertilizers
http://aims.fao.org/aos/agrovoc/c_4592
English
Genetic diversity as resource
http://aims.fao.org/aos/agrovoc/c_33952
Subjects: Farming Systems
Crop husbandry > Production systems > Vegetables
"Organics" in general > History of organics
Research affiliation: Brazil > Embrapa - Brazilian Agricultural Research Corporation
Brazil > Other organizations
ISSN:1980-9735
Related Links:http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/index
Deposited By: Pinto, Gabriela Franco
ID Code:23083
Deposited On:10 Sep 2013 17:42
Last Modified:10 Sep 2013 17:42
Document Language:Portuguese/Portugues
Status:Published
Refereed:Peer-reviewed and accepted

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