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ResumoA Cattleya warneri var. concolor(Orchidaceae) é uma planta epífita ameaçada de extinção com potencial econômico ornamental. Este trabalho objetivou estudar o crescimentoin vitro de plântulas da espécie supracitada em diferentes doses de ácidos húmicos (AH) isolados de vermicomposto. A avaliação do crescimento promovido pelos AH foi realizada por meio das variáveis número de folhas e raízes, massas frescas e secas das folhas e de raízes e de estimativas da atividade da enzima H+-ATPase. Os resultados obtidos indicaram que o material húmico obtido foi capaz de incrementar o crescimento da planta estudada e promover estímulos associados à atividade da referida enzima. Estabelece-se assim, um bioestimulante eficiente visando a produção de mudas deCattleya warneri var. concolor.

AbstractCattleya warneri var. concolor(Orchidaceae) is an endangered epiphyte plant with ornamental economic potential. In this research, we have studied in vitro growth of C. warneri's seedlings at different doses of humic acids isolated from vermicompost. The evaluation on growth promoted by AH was performed using variables number of leaves and roots, fresh and dry weight of leaves and roots and estimates of the H+-ATPase enzyme activity. The results indicated that the humic material obtained was able to increase the growth of the studied plant and promoting stimuli associated with the said enzyme activity. It is thus established, an efficient biostimulant aimed at producing Cattleya warneri var. concolor seedlings.

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

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