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| Gomes,Marcelo Pedrosa; Marques,Teresa Cristina Lara Lanza Sa e Melo; Martins,Giordane Augusto; Carneiro,Marília Mercia Lima Carvalho; Soares,Ângela Maria. |
| Physiological and anatomical features of Cd-tolerance in Pfaffia glomerata were examined by exposing plantlets to nutrient solutions with increasing Cd concentrations (0, 15, 45, and 90 µmol Cd L-1), and possible Cd-tolerance markers were established. Cd contents were found to be higher in roots than in shoots. According to the bio-concentration factor data, this species is effectively a Cd-hyperaccumulator, as previously attested. Cd induced the appearance of xeromorphic characteristics in leaves (decreased water potential, increased numbers and decreased stomata size) and increased root endodermis thickness. The enzymatic antioxidant systems of roots and leaves were differently affected by Cd. The coordinated activities of antioxidant enzymes were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Cd-oxidative damage; Phytoextraction; Tolerance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000400008 |
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| Diniz,Patrícia Fabian de Araújo; Oliveira,Luiz Edson Mota de; Gomes,Marcelo Pedrosa; Castro,Evaristo Mauro de; Mesquita,Alessandro Carlos; Bonome,Lisandro Tomas da Silva; Silva,Luciana da. |
| Fungos micorrízicos são reconhecidamente benéficos quando em associação às plantas por favorecerem seu crescimento e desenvolvimento. Apesar de pouco comum para a seringueira, a inoculação artificial de fungos micorrízicos arbusculares (FMAs) tem se mostrado uma alternativa para a redução no uso de fertilizantes e pesticidas nas culturas, bem como para a formação de mudas, visando obtenção de porta-enxertos precoces e bem nutridos. O estudo objetivou avaliar o efeito da inoculação do FMA Glomus clarum no crescimento e características biofísicas e anatômicas de plantas jovens de seringueira. Os tratamentos consistiram de plantas inoculadas com o fungo Glomus clarum adubadas com 50 ppm de fósforo (mic+50P), plantas não inoculadas adubadas com 50 ppm de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Micorrização; Porta-enxertos; Resistência estomática. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100007 |
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| Gomes,Marcelo Pedrosa; Marques,Teresa Cristina Lara Lanza de Sá e Melo; Nogueira,Mariana de Oliveira Gonçalves; Castro,Evaristo Mauro de; Soares,Ângela Maria. |
| The growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to evaluate the effect of levels of soil contamination (0, 7.5 % and 15 % m³ m-3) on biomass production, on photosynthetic characteristics and on anatomical changes in roots and leaves of brachiaria (Brachiaria decumbens Stapf.). After seeds were planted, seedlings were uprooted and replanted in vases containing soil at different contamination levels, being left to rest for 120 days. At the end of that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contaminated soil; Chlorophyll; Growth; Potencial photosynthesis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500009 |
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