Lemnaceae
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Capacidade da Lemna aequinoctialis para acumular metais pesados de água contaminada
A capacidade das plantas em tolerar e absorver quantidades elevadas de metais pesados é usada como uma tecnologia promissora para limpeza de resíduos perigosos em ambientes altamente contaminados. O desempenho da macrófita L. aequinoctialis em absorver metais pesados foi estudado durante sua floração em dois períodos de amostragem diferentes. As amostr
Acta Amaz.. Publicado em: 2013-06
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2. Floristic surveys of aquatic macrophytes in reservoirs in the Agreste zone of Pernambuco State, Brazil
We surveyed the aquatic macrophytes in reservoirs in Camocim de São Félix in the Agreste zone of Pernambuco State, Brazil. Plants were collected on a bimonthly schedule from November/2008 to May/2009 in four reservoirs, and 33 taxa distributed among 23 families were encountered. The family Cyperaceae had the greatest number of species, followed by Lemnacea
Braz. J. Bot.. Publicado em: 2012
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3. Levantamento florístico e produtividade de macrófitas aquáticas ocorrentes em ambientes limnéticos do Estado de Pernambuco Brasil
A wide variety of aquatic macrophytes can be found on the banks of rivers or reservoirs (sluices and dams). They are important components of these ecosystems, consisting of stock portion of energy and matter in the first trophic level. However, due to the changed environment, some species begin to develop dense infestations,promoting a series of losses, and
Publicado em: 2009
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4. Reúso de água e polimento de efluentes de lagoas de estabilização por meio de cultivo consorciado de plantas da família Lemnaceae e tilápias
Recently, the interests towards duckweed-based-ponds utilization are due to the fact that these systems present high nutrient and algae removal efficiencies, producing high protein biomass. The present work was developed at The Wastewater Treatment Plant from Florianópolis (Casan) and divided into three trials. The first and second trials were conducted at
Publicado em: 2008
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5. Growth, Greening, and Phytochrome in Etiolated Spirodela (Lemnaceae)
Two species of Spirodela were grown aseptically in a simple mineral medium containing sucrose. Weak red light (15 erg cm−2 sec−1) enhanced dark growth of S. oligorrhiza, whereas weak far red light (15 erg cm−2 sec−1) when given after the red light reduced this effect.
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6. Nitrogen Fixation (Acetylene Reduction) Associated with Duckweed (Lemnaceae) Mats
Duckweed (Lemnaceae) mats in Texas and Florida were investigated, using the acetylene reduction assay, to determine whether nitrogen fixation occurred in these floating aquatic macrophyte communities. N2-fixing microorganisms were enumerated by plating or most-probable-number techniques, using appropriate N-free media. Results of the investigations indicated
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7. Photoperiodic Entrainment Patterns in the CO2 Output of Lemna perpusilla 6746 and of Several Other Lemnaceae
The CO2 output of Lemna perpusilla 6746 in “skeleton photoperiods” consisting of alternating 10½-hour and 13-hour dark periods separated by ¼-hour illuminations was recorded under stable high and low nitrate conditions. The phase relationship finally attained between light schedule and output is the same regardless of which dark period is given first,
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8. Phenol-Oxidizing Peroxidases Contribute to the Protection of Plants from Ultraviolet Radiation Stress1
We have studied the mechanism of UV protection in two duckweed species (Lemnaceae) by exploiting the UV sensitivity of photosystem II as an in situ sensor for radiation stress. A UV-tolerant Spirodela punctata G.F.W. Meyer ecotype had significantly higher indole-3-acetic acid (IAA) levels than a UV-sensitive ecotype. Parallel work on Lemna gibba mutants sugg
American Society of Plant Physiologists.