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Horticultura Brasileira
Article . 2016 . Peer-reviewed
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Horticultura Brasileira
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Luminosidade e imersão em água na aclimatização intermediária de Dendrobium phalaenopsis

Authors: Sorgato, José C; Rosa, Yara BCJ; Soares, Jackeline S; Pinto, Jannaina VC; Rosa, Derek BCJ;

Luminosidade e imersão em água na aclimatização intermediária de Dendrobium phalaenopsis

Abstract

RESUMO: Dendrobium phalaenopsis é uma orquídea ornamental que apresenta boa porcentagem de germinação e desenvolvimento em meio assimbiótico. Entretanto, a sua aclimatização ex vitro ainda requer estudos, pois, muitas vezes ocasiona a desidratação das plantas, prejudicando seu crescimento e desenvolvimento. Objetivou-se com este trabalho, estudar o efeito conjunto do período de imersão de plantas D. phalaenopsis em água destilada e de duas condições de luminosidade em sua aclimatização intermediária. Plantas foram dividas em conjuntos de 40, sendo submetidos à imersão em água por 0; 12; 24; 36; 48; 60; 72 ou 84 horas. Após cada período de imersão as plantas foram transplantadas para recipientes contendo o substrato de plantio e posteriormente alocadas em sala de crescimento para a aclimatização intermediária por 30 dias, sendo que, um conjunto de 20 plantas de cada período (incluindo o controle) permaneceu sob luz fluorescente branca (18,9 µmol/m2/s) e as outras 20 plantas, permaneceram sob luz fluorescente branca + luz fluorescente vermelha (14,85 µmol/m2/s). Na sequência, foram submetidas à aclimatização definitiva em viveiro telado (162,0 µmol/m2/s) por 10 meses. À medida que o tempo de imersão aumentou houve decréscimo nas relações de massa fresca e comprimento de pseudobulbos e no número de raízes das plantas cultivadas sob luz branca + luz vermelha, enquanto que as plantas cultivadas sob luz branca não apresentaram resposta diferenciada em relação ao tempo de imersão. A imersão em água destilada independentemente da condição de luminosidade não é recomendada para D. phalaenopsis.

Keywords

imersão, light conditions., water immersion, floricultura, floriculture, Orchidaceae, condições de luminosidade.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
Green
gold