2011
DOI: 10.1590/s1516-89132011000500025
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Structural and ecophysiological alterations of the water hyacinth [Eichhornia crassipes (Mart.) Solms] due to anthropogenic stress in Brazilian rivers

Abstract: In this work, the structural and ecophysiological alterations (chlorophyll a

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Cited by 10 publications
(3 citation statements)
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“…pendulum Bishop's Crown species the situation is slightly different, in the sense that, at the plots treated, there are ascertained valoric thresholds slightly superior of the chlorophyll a and b comparatively with the control sample, excepting the variant with FeSO 4 , where the decelated concentration was under the reference threshold (1.515±0.0035 mg/g fresh tissue and 1.407±0.055 mg/g fresh tissuechlorophyll a, respectively 0.634±0.03 mg/g fresh tissue and 0.58±0.04 mg/g fresh tissuechlorophyll b). The specialty literature highlights the influence that exerts the different concentrations of the pesticides [10,47] and of the heavy metals [48][49][50] on the assimilatory pigments content. Different studies [51][52][53] signalize the reducing of the chlorophyll's a and b level and of the carotenes under the influence of Fe and Pb ion's which can be associated with the absorption and the deficitary distribution of the essential nutrients, which has as consequence the growing process' perturbation of the plants.…”
Section: Resultsmentioning
confidence: 99%
“…pendulum Bishop's Crown species the situation is slightly different, in the sense that, at the plots treated, there are ascertained valoric thresholds slightly superior of the chlorophyll a and b comparatively with the control sample, excepting the variant with FeSO 4 , where the decelated concentration was under the reference threshold (1.515±0.0035 mg/g fresh tissue and 1.407±0.055 mg/g fresh tissuechlorophyll a, respectively 0.634±0.03 mg/g fresh tissue and 0.58±0.04 mg/g fresh tissuechlorophyll b). The specialty literature highlights the influence that exerts the different concentrations of the pesticides [10,47] and of the heavy metals [48][49][50] on the assimilatory pigments content. Different studies [51][52][53] signalize the reducing of the chlorophyll's a and b level and of the carotenes under the influence of Fe and Pb ion's which can be associated with the absorption and the deficitary distribution of the essential nutrients, which has as consequence the growing process' perturbation of the plants.…”
Section: Resultsmentioning
confidence: 99%
“…También se han evaluado los daños ultraestructurales inducidos en cloroplastos con relación a la cercanía de fuentes antropogénicas de cromo, como industrias y ciudades. Estos estudios usaron plantas coleccionadas en campo, donde la determinación exacta de la especie química del metal y la concentración de cromo que generó estos daños es compleja (Vitória et al 2011;Lage-Pinto et al 2008;Sanita di Toppi et al 2007;Mangabeira et al 2004).…”
Section: Micrograph Shows Tylacoid Membranes (Mc) Chloroplast Membranes (Mcl) and Inside Matrix Or Estroma (Es) Scale Bar 200 Nm C Tem Miunclassified
“…Sólo alrededor de un 10 % del cromo biodisponible es translocable a la parte aérea de las plantas (Zayed & Terry, 2003). El comportamiento bioacumulador de E. crassipes hace que se use de forma extensiva para extraer sustancias tóxicas de los cuerpos de agua donde vive (Giri et al, 2012, Patel, 2012, Vitória et al, 2011, Agunbiade et al, 2009. Uno de los factores que influye en la alta acumulación de cromo en raíces de E. crassipes consiste en la presencia de grupos cargados negativamente (carboxilo, sulfonato, fosforilo, amida e imidazol), presentes en las moléculas de celulosa y proteínas de transporte de la pared celular.…”
Section: Comportamiento De La Bioacumulación En óRganos De E Crassipesunclassified