Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/941315
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dc.contributor.authorMORAES, R. M.pt_BR
dc.contributor.authorMELO, I. S. dept_BR
dc.contributor.authorSUMYANTO, J.pt_BR
dc.contributor.authorCHANDRA, S.pt_BR
dc.contributor.authorJOSHI, V.pt_BR
dc.date.accessioned2012-12-05T11:11:11Zpt_BR
dc.date.available2012-12-05T11:11:11Zpt_BR
dc.date.created2012-12-05pt_BR
dc.date.issued2012pt_BR
dc.identifier.citationAmerican Journal of Plant Sciences, v. 3, n. 10, p. 1382-1389, 2012.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/941315pt_BR
dc.descriptionSeveral unfruitful attempts to grow axenic shoot cultures of Smallanthus sonchifolius, also known as yacon, were made before healthy shoots grew in association with bacteria on half strength Murashigue and Skoog media supplemented with 2.2 µM benzylaminopurine. Twenty-one bacterial isolates were obtained from in vitro S. sonchifolius plantlets, eight of these isolates were identified as Flavimonas oryzihabitans, Curtobacterium pusillum, Sphingomonas paucimobilis, and Microbacterium imperiale. These microorganisms produced indole acetic acid (IAA) at amounts varying between 8.89 to 47.45 µg/mL, reason for being classified as plant growth promoting bacteria (PGPB). The results show that buds associated with bacteria cultured on sucrose free media produced 3.77 new roots measuring 18.33 cm in length after a 30-day growing period. In contrast, buds growing on sucrose supplemented media, the number of roots induced was higher (6.67 to 14 roots/explant) but shorter in length, 4.67 to 5.83 cm. During plant acclimatization to soil, photosynthesis and water efficiency were measured showing that the plants were healthy and vigorous. A slightly higher rate of photosynthesis and water use efficiency was recorded in the plants produced on heterotrophic conditions as compared to plants grown in sucrose free media. Plants adapted well in the soil demonstrating that the PGPB community associated to S. sonchifolius in shoot cultures was not harmful to plant production. The purpose of this study was to demonstrate that the bacteria associated with in vitro S. sonchifolius shoot cultures was not the result of microbial contamination, but rather from symbiotic associations that extended from cultivation in the greenhouse, to culture and back to soil. This is the first report to show that autotrophic cultures may represent a viable alternative to grow healthy plants without eliminating beneficial bacteria associated with the host.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectYaconpt_BR
dc.subjectIAApt_BR
dc.subjectÇido indolacéticopt_BR
dc.titleBacterial community associated with autotrophic and heterotrophic cultures of medicinal plant smallanthus sonchifolius (Yacon).pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2012-12-05T11:11:11Zpt_BR
dc.subject.thesagroPlanta medicinalpt_BR
dc.subject.thesagroBactériapt_BR
dc.subject.nalthesaurusMicropropagationpt_BR
dc.subject.nalthesaurusEndophytespt_BR
dc.subject.nalthesaurusSmallanthus sonchifoliuspt_BR
dc.subject.nalthesaurusIndole acetic acidpt_BR
riaa.ainfo.id941315pt_BR
riaa.ainfo.lastupdate2012-12-05pt_BR
dc.contributor.institutionRITA M. MORAES, University of Mississippi; ITAMAR SOARES DE MELO, CNPMA; JOKO SUMYANTO, University of Mississippi; SUMAN CHANDRA, University of Mississippi; VAISHALI JOSHI, University of Mississippi.pt_BR
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