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https://repositorio.ufba.br/handle/ri/15901
Tipo: | Artigo de Periódico |
Título: | Effects of plant age on arsenic hyperaccumulation by Pteris vittata L. |
Título(s) alternativo(s): | Water, Air, and Soil Pollution |
Autor(es): | Gonzaga, Maria Isidória Silva Ma, Lena Q. Santos, Jorge Antônio Gonzaga |
Autor(es): | Gonzaga, Maria Isidória Silva Ma, Lena Q. Santos, Jorge Antônio Gonzaga |
Abstract: | Plant age affects its elemental uptake and biomass accumulation, which is important for the application of plants in phytoextraction. In this research, we evaluated the effects of plant age on arsenic accumulation by arsenic hyperaccumulator Pteris vittata after growing in an arsenic-contaminated soil for 8 weeks. The study used a completely randomized design consisting of four plant ages (2, 4, 10 and 16 months) with four replications each. While the fronds of the 2 month old plants contained 36% more arsenic than those of the 4 and 16 month old plants, they were lower in roots. After 8 weeks of growth, the final frond biomass increased by 39, 6.9, 2.0 and 1.1 times compared to the initial frond biomass, from youngest to oldest, respectively. Higher phosphorus and iron accumulation in the roots of older plants may have affected the plant’s efficiency to bioconcentrate and transfer arsenic from the roots to the fronds. Greater metabolic activity and higher rate of biomass production lead to higher As accumulation and removal by young plants. This research demonstrated that the use of young plants can be an effective strategy to reduce the time to remediate an As-contaminated site. |
Palavras-chave: | Arsenic Plant age Phytoextraction Hyperaccumulation Pteris vittata |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/15901 |
Data do documento: | 2007 |
Aparece nas coleções: | Artigo Publicado em Periódico (Faculdade de Medicina) |
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art%3A10.1007%2Fs11270-007-9485-y.pdf | 264,19 kB | Adobe PDF | Visualizar/Abrir |
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