Influence of two polycyclic aromatic hydrocarbons on spore germination, and phytoremediation potential of Gigaspora margarita-Echynochloa polystachya symbiosis in benzo[a]pyrene-polluted substrate
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2006
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| _version_ | 1876477982663507968 |
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| author | Julián Delgadillo |
| author_facet | Julián Delgadillo |
| contents | Influence of two polycyclic aromatic hydrocarbons on spore germination, and phytoremediation potential of Gigaspora margarita-Echynochloa polystachya symbiosis in benzo[a]pyrene-polluted substrate Julián Delgadillo Alicia Franco Alejandro Alarcón Frederick T. Davies Ronald Ferrera Ciencias de la Tierra PAH rhizosphere arbuscular mycorrhizal fungi Arbuscular mycorrhizal fungi (AMF) are ubiquitous microorganisms that occur incontaminated soils. However, little is known about the responses of AMF with organiccontaminants such as polycyclic aromatic hydrocarbons (PAH). The first objectiveof this study was to evaluate the influence of two PAH on spore germinationof Gigaspora margarita Becker & Hall. Water-agar plates were contaminated withphenanthrene (PHE) and benzo[a]pyrene (BaP) at several concentrations: 0, 25 (0.1mM BaP & 0.15 PHE), 50 (0.2 mM BaP & 0.3 mM PHE), 75 (0.3 mM BaP & 0.45mM PHE), and 100 µg mL-1 (0.4 mM BaP & 0.6 mM PHE), respectively. The secondobjective consisted on the evaluation of the responses of the symbiosis between G.margarita and Echinochloa polystachya (H.B.K.) Hitch. to increased concentrationsof BaP (0, 25 (0.1 mM), 50 (0.2 mM), 75 (0.3 mM), and 100 mg kg-1 (0.4 mM)under plant growth chamber conditions. Spore germination and hyphal length weredrastically reduced by PHE. Reduction of spore germination was higher than 90% inpresence of PHE. In presence of BaP, spore germination reduction was 42.8% whenexposed at 100 µg mL-1 (0.4 mM). Spores that germinated in presence of 75 (0.3mM) and 100 (0.4 mM) µg BaP mL-1 had greater hyphal elongation. BaP did not affectshoot dry mass of non-mycorrhizal or mycorrhizal E. polystachya. Mycorrhizal plantsshowed higher dehydrogenase activity in the rhizosphere soil at 0, 0.2 and 0.3 mMBaP, but reduced root polyphenol oxidase activity at 0 and 0.1 and higher at 0.3 mMBaP than non-mycorhizal plants. Dissipation of BaP was higher in non-mycorrhizalplants than mycorrhizal plants. Echinochloa polystachya showed an intrinsic capabilityon dissipating PAH from its rhizosphere. 2006 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37022104 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.1 Vol.22 |
| format | Artículo científico |
| id | redalyc_37022104 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Influence of two polycyclic aromatic hydrocarbons on spore germination, and phytoremediation potential of Gigaspora margarita-Echynochloa polystachya symbiosis in benzo[a]pyrene-polluted substrate Julián Delgadillo Ciencias de la Tierra PAH rhizosphere arbuscular mycorrhizal fungi Influence of two polycyclic aromatic hydrocarbons on spore germination, and phytoremediation potential of Gigaspora margarita-Echynochloa polystachya symbiosis in benzo[a]pyrene-polluted substrate Julián Delgadillo Alicia Franco Alejandro Alarcón Frederick T. Davies Ronald Ferrera Ciencias de la Tierra PAH rhizosphere arbuscular mycorrhizal fungi Arbuscular mycorrhizal fungi (AMF) are ubiquitous microorganisms that occur incontaminated soils. However, little is known about the responses of AMF with organiccontaminants such as polycyclic aromatic hydrocarbons (PAH). The first objectiveof this study was to evaluate the influence of two PAH on spore germinationof Gigaspora margarita Becker & Hall. Water-agar plates were contaminated withphenanthrene (PHE) and benzo[a]pyrene (BaP) at several concentrations: 0, 25 (0.1mM BaP & 0.15 PHE), 50 (0.2 mM BaP & 0.3 mM PHE), 75 (0.3 mM BaP & 0.45mM PHE), and 100 µg mL-1 (0.4 mM BaP & 0.6 mM PHE), respectively. The secondobjective consisted on the evaluation of the responses of the symbiosis between G.margarita and Echinochloa polystachya (H.B.K.) Hitch. to increased concentrationsof BaP (0, 25 (0.1 mM), 50 (0.2 mM), 75 (0.3 mM), and 100 mg kg-1 (0.4 mM)under plant growth chamber conditions. Spore germination and hyphal length weredrastically reduced by PHE. Reduction of spore germination was higher than 90% inpresence of PHE. In presence of BaP, spore germination reduction was 42.8% whenexposed at 100 µg mL-1 (0.4 mM). Spores that germinated in presence of 75 (0.3mM) and 100 (0.4 mM) µg BaP mL-1 had greater hyphal elongation. BaP did not affectshoot dry mass of non-mycorrhizal or mycorrhizal E. polystachya. Mycorrhizal plantsshowed higher dehydrogenase activity in the rhizosphere soil at 0, 0.2 and 0.3 mMBaP, but reduced root polyphenol oxidase activity at 0 and 0.1 and higher at 0.3 mMBaP than non-mycorhizal plants. Dissipation of BaP was higher in non-mycorrhizalplants than mycorrhizal plants. Echinochloa polystachya showed an intrinsic capabilityon dissipating PAH from its rhizosphere. 2006 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37022104 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.1 Vol.22 |
| title | Influence of two polycyclic aromatic hydrocarbons on spore germination, and phytoremediation potential of Gigaspora margarita-Echynochloa polystachya symbiosis in benzo[a]pyrene-polluted substrate |
| topic | Ciencias de la Tierra PAH rhizosphere arbuscular mycorrhizal fungi |
| url | https://www.redalyc.org/articulo.oa?id=37022104 |