Hydrocarbon Uptake by Roots of Vicia faba (Fabaceae)

Abstract

Vicia faba was grown in crude oil polluted soil and its roots were extracted for the detection and estimation of hydrocarbons. Saturated and unsaturated Aliphatic Hydrocarbons (AHs) ranging from C(22) to C(36) were identified in AHs fraction. However, PAHs were not present in the same extract. This could be due to the fact that PAHs being toxic compounds are not accumulated in the plant root extracts of V. faba grown in crude oil polluted soil. Three phytoalexins were identified and estimated by mass spectrometric analysis in the root extracts of V. faba. These three compounds are 2-t-butyl-4-(dimethyl benzyl) phenol, 2, 4-bis (dimethyl benzyl) phenol and 2,4-bis (dimethyl benzyl)-6-butyl phenol. These phenolics in V. faba are being reported for the first time. These compounds are presumably elicited as a direct stress on crude oil hydrocarbons on the roots of this plant.

Peculiarities of Morphogenesis of Сarex hirta L. on the Oil-Contaminated Soil

“…Îäíàêî äëèíà êîðíåé èç çàãðÿçíåííîé ñðåäû îêàçàëàñü áîëüøå íà 20,4 % ïî ñðàâíåíèþ ñ êîíòðîëüíûìè. Êîðíè íåïîñðåäñòâåííî êîíòàêòèðóþò ñ íåôòüþ â ïî÷âå, à íåôòü ìîaeåò âëèÿòü íà ðîñò è ðàçâèòèå ðàñòåíèé òàê aeå, êàê è ðåãóëÿòîðû ðîñòà [Merkl et al, 2005;Nageswara Rao et al, 2007]. Ðîñòîñòèìóëèðóþùèå ñâîéñòâà â çàâèñèìîñòè îò êîíöåíòðàöèè ñûðîé íåôòè èìåþò åå ñîñòàâëÿþùèå íàôòåíîâûå óãëåâîäîðîäû [Añhuba, 2006].…”

Chronic Toxicity of Weathered Oil-Contaminated Soil

“…Values with different letter are statistically different (Tukey, p = 0.05) Values with different letter are statistically different (Tukey, p = 0.05) Crotaria incana plants showed a greater effect on biomass in response with exposure to the weathered oil (Figure 4), which may be related to increased toxicity of recalcitrants compounds. There are also some soil properties which allow the adsorption of pollutants [60]. Clay soils with high organic content and low pH may favor the persistence of toxic substances in the soil for a long time after the oil spill occurred [61,34], due to the adhesiveness of organic matter [62].…”

Environmental Bases on the Exploitation of Crude Oil in Mexico

“…Likewise, it induces the loss of biodiversity of microbial communities, which are of significant relevance in the biogeochemical cycles of the ecosystem affecting, as a consequence, its productivity (Rhodes & Hendricks, 1990) and the nutrients availability. b. Rhizosphere: It is the soil area surrounding the plant's root containing, 10 to 100 times more exudates than a soil lacking plants (Rao et al, 2007b). The root exudates (sugars, alcohols, and enzymes) provide enough carbon and energy for the rhizospheric microorganisms (Olguín et al, 2007;Muñoz et al, 2010) and it is precisely on this region where the intense and complex interactions between the roots systems, the microorganisms and the environment occur, with an increase of the total microbial activity (De la Garza et al, 2008).…”