Interação de chumbo, da saturação por bases do solo e de micorriza arbuscular no crescimento e nutrição mineral da soja

Andrade, Sara Adrián López de; Abreu, Cleide Aparecida de; Abreu, Mônica Ferreira de; Silveira, Adriana Parada Dias da

doi:10.1590/s0100-06832003000500019

Cited by 19 publications

(9 citation statements)

References 27 publications

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“…Even though there is little available literature regarding the effect of Pb in the Ca content in plants, the results of our study are in accordance with those found by Andrade et al (2003), which have shown that Pb did not cause a reduction in the Ca concentration in soybeans plants, independent of its mycorrhizal status. In a general manner, it was evident that mycorrhization exerted a positive influence in the absorption of certain nutrients, such as Fe, P and S. Sudova and Vosatka (2007) have observed that maize plants associated with G. intraradices in Pb-contaminated soil absorbed lower Pb than non-AM associated plants, whereas Chen et al (2005) have observed that the plants used in their study, grown in Pb-contaminated soil, absorbed more Pb when they were colonized by AM fungi.…”

Section: Discussionsupporting

confidence: 92%

Arbuscular mycorrhiza confers Pb tolerance in Calopogonium mucunoides

et al. 2011

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Heavy metals (HMs) are environmental pollutants of great concern to humans because of their high potential toxicity. Lead is a HM that is present in the soil in very small amounts, but anthropogenic activities have increased its content in some locations, which can make these areas unproductive or inappropriate for crop production. However, there are some plants that can grow in contaminated soils and, thus, can be useful for the removal or stabilisation of such contaminants. In addition, plants that are not able to tolerate high concentrations of HMs in the soil can become tolerant or increase their performance when associated with arbuscular mycorrhizal (AM) fungi. Accordingly, this study was carried out to verify whether the inoculation of Glomus etunicatum, an AM fungus species, in Calopogonium mucunoides would influence plant tolerance to increasing concentrations of Pb in the soil. The experimental design was completely randomised, in a 2 9 4 factorial design, and the treatments consisted of inoculation (or not) with the AM fungus, G. etunicatum, and the addition of four Pb concentrations (0, 250, 500 or 1,000 mg kg -1 ) to the soil. The results showed that the association of C. mucunoides with G. etunicatum promoted biomass production, and nutrient uptake (P, S and Fe) was also positively influenced by mycorrhization. The malondialdehyde content was higher in non-mycorrhizal leaves, suggesting a reduction in the damage to membranes by lipid peroxidation in plants associated with mycorrhizae. However, the Pb concentration in the shoots did not differ between the mycorrhizal and non-mycorrhizal plants. The results of our study suggest that the AM symbiosis can be considered very effective in contributing to the tolerance of C. mucunoides to Pb.

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Section: Discussionsupporting

confidence: 92%

Arbuscular mycorrhiza confers Pb tolerance in Calopogonium mucunoides

et al. 2011

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“…de Wit cultivated in three soils in the caatinga (which was preserved, without the superficial layer, and contaminated with copper effluent from mining) showed lower growth in the copper contaminated treatment, due to the higher absorption of this metal by the roots (20). In another study using soybean plants, the addition of Pb to the soil reduced the growth of the plants with mycorrhizae, directly influencing the production of dry matter (1). …”

Section: Resultsmentioning

confidence: 99%

“…Recent studies in contaminated environments have shown there is a strong reduction in growth in colonized and non-colonized plants as the contamination level increases (1,20). It has also been found that AMF vary from tolerant to very sensitive when they are growing in soil with heavy metals (4) and that plant development depends on the contamination level and the type of heavy metal present.…”

Section: Resultsmentioning

confidence: 99%

Microbial activity, arbuscular mycorrhizal fungi and inoculation of woody plants in lead contaminated soil

Gattai¹,

Pereira²,

Costa³

et al. 2011

Braz. J. Microbiol.

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The goals of this study were to evaluate the microbial activity, arbuscular mycorrhizal fungi and inoculation of woody plants (Caesalpinia ferrea, Mimosa tenuiflora and Erythrina velutina) in lead contaminated soil from the semi-arid region of northeastern of Brazil (Belo Jardim, Pernambuco). Dilutions were prepared by adding lead contaminated soil (270 mg Kg-1) to uncontaminated soil (37 mg Pb Kg soil-1) in the proportions of 7.5%, 15%, and 30% (v:v). The increase of lead contamination in the soil negatively influenced the amount of carbon in the microbial biomass of the samples from both the dry and rainy seasons and the metabolic quotient only differed between the collection seasons in the 30% contaminated soil. The average value of the acid phosphatase activity in the dry season was 2.3 times higher than observed during the rainy season. There was no significant difference in the number of glomerospores observed between soils and periods studied. The most probable number of infective propagules was reduced for both seasons due to the excess lead in soil. The mycorrhizal colonization rate was reduced for the three plant species assayed. The inoculation with arbuscular mycorrhizal fungi benefited the growth of Erythrina velutina in lead contaminated soil.

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“…The association of roots with soil microorganisms such as mycorrhisal fungi can also attenuate the negative effects of high metal concentrations in soil (Andrade et al, 2003;Bothe et al, 2010). The mycorrhisal association becomes increasingly important for plants growing in contaminated soil that benefit from improved tolerance to other abiotic or biotic stresses in addition to improved mineral nutrition (Gohre and Paszkowski, 2006).…”

Section: Introductionmentioning

confidence: 99%