Lemna Gibba
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Potencial de remoção de arsênio de solução aquosa por macrofita
O potencial de três macrófitas aquáticas - Azolla caroliniana, Salvinia mínima e Lemna gibba - foi avaliado neste estudo, com vistas à seleção de plantas para remediação de ambientes contaminados com arsênio (As). Os experimentos foram conduzidos em casa de vegetação durante seis dias, em vasos contendo solução Hoagland (¼ força iônica) e As
Planta daninha. Publicado em: 2012-12
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2. Potencial de macrófitas para remoção de atrazine de solução aquosa
Avaliou-se, neste estudo, o potencial de três macrófitas - Azolla caroliniana, Salvinia minima e Lemna gibba - com vistas à seleção de plantas para remediação de ambientes contaminados por atrazine. Foram realizados experimentos em casa de vegetação durante seis dias, em vasos contendo solução nutritiva Hoagland (0,25 de força iônica), nas segui
Planta Daninha. Publicado em: 2011
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3. Arsênio em plantas aquáticas: absorção, toxicidade, nutrição e metabolismo da glutationa / Arsenic in aquatic plants: absorption, toxicity, nutrition and glutathione metabolism
Arsenic (As) toxicity and its effects on glutathione metabolism were analyzed in two vegetal specimens: Lemna gibba and Salvinia minima. Plants were cultivated in nutrient solution, pH 6.5, and exposed to arsenic concentrations of 0.0 and 1.0 mg L-1, for three days. Both species accumulated As in their tissues when exposed to this element, being this accumul
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/10/2010
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4. Crescimento e respostas antioxidantes de macrófitas aquáticas submetidas ao arsênio / Growth and antioxidative responses of aquatic macrophytes to arsenic
The influence of different concentrations of As over some aspects of growth and antioxidant system were studied in three water species: Azolla caroliniana, Lemna gibba and Salvinia minima, in nutrient solution. After the three species being exposed to five concentrations of As (0.0, 0.25, 0.5, 1.0 and 1.5 mg.L-1) in nutrient solution, the As content into the
Publicado em: 2006
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5. Potencial of macrophytes to remove arsenic and atrazine from water solution / Potencial de macrófitas para remoção de arsênio e atrazine em solução aquosa
The potential of three aquatic plants: Azolla caroliniana, Salvinia minima and Lemna gibba was evaluated, in this study, in order to select plants to be used in phytoremediation of water polluted by arsenic (As) and atrazine. The experiments were carried out in a green house, during six days, using vases containing Hoagland solution ( of ionic force), in the
Publicado em: 2006
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6. Nucleotide sequence encoding the precursor of the small subunit of ribulose 1,5-bisphosphate carboxylase from Lemna gibba L.G-3.
We have sequenced a cDNA clone, pLgSSU, which encodes the small subunit of ribulose 1,5-bisphosphate carboxylase of Lemna gibba L.G-3 a monocot plant. This clone contains a 832 basepair insert which encodes the entire 120 amino acids of the mature small subunit polypeptide (Mr = 14,127). In addition this clone encodes 53 amino acids of the amino terminal tra
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7. Effect of Daylength on the Ability of Salicylic Acid to Induce Flowering in the Long-day Plant Lemna gibba G3 and the Short-day Plant Lemna paucicostata 6746
When the long-day plant Lemna gibba L., strain G3 is grown on control medium the critical daylength is just under 10 hours. With 3.2 micromolar salicylic acid added to the medium substantial flower promotion is obtained on 9-, 10-, and 11-hour daylengths. On an 8-hour daylength salicylic acid treatment results in only a very small flowering response, and wit
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8. Relationship between Energy-dependent Phosphate Uptake and the Electrical Membrane Potential in Lemna gibba G1 12
High rates of phosphate uptake into phosphate-starved Lemna gibba L. G1 were correlated with a high membrane potential (pd = −220 millivolts). In plants maintaining a low pd (−110 millivolts), the uptake rate was only 20% of that of high-pd plants. At the onset of phosphate transport, the membrane of high-pd plants was transiently depolarized. This effec
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9. The Phytochrome Response of the Lemna gibba NPR1 Gene Is Mediated Primarily through Changes in Abscisic Acid Levels1
Two important signaling systems involved in the growth and development of plants, those triggered by the photoreceptor phytochrome and the hormone abscisic acid (ABA), are involved in the regulation of expression of the NPR1 gene of Lemna gibba. We previously demonstrated that phytochrome action mediates changes in ABA levels in L. gibba, correlating
American Society of Plant Physiologists.
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10. Comparison of the Ability of Salicylic Acid and Ferricyanide to Induce Flowering in the Long-day Plant, Lemna Gibba G3
Both salicylic acid and ferricyanide induce flowering in the long-day plant Lemna gibba L., strain G3 under 8- and 9-hour short days. In both cases the effect is daylength-dependent. Salicylic acid is ineffective on daylengths less than 8 hours and ferricyanide is ineffective on daylengths less than 5 hours. When both substances are given together a striking
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11. Gibberellin and CCC Effects on Flowering and Growth in the Long-day Plant Lemna gibba G3 1
The application of gibberellic acid (GA3) to the non-rosette long-day plant Lemna gibba G3 at concentrations from 0.1 to 100 mg/l did not induce flowering on short days and inhibited flowering on long days at concentrations of 1 mg/l and higher. On both short and long days GA3 concentrations above 1 mg/l caused a decrease in frond size and fresh and dry weig
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12. Selection and Characterization of [alpha]-Methyltryptophan-Resistant Lines of Lemna gibba Showing a Rapid Rate of Indole-3-Acetic Acid Turnover.
Turnover rate is an important aspect of the regulation of plant processes by plant growth substances. To study turnover of indole-3-acetic acid (IAA), two [alpha]-methyltryptophan-resistant lines (MTR1 and MTR2) of Lemna gibba were generated by nitrosomethyl urea treatment of an inbred line derived from L. gibba G-3. In this report we describe: (a) the devel