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Enhanced Pb Absorption by Hordeum vulgare L. and Helianthus annuus L. Plants Inoculated with an Arbuscular Mycorrhizal Fungi Consortium

Author:
Arias, Milton Senen Barcos, Peña-Cabriales, Juan José, Alarcón, Alejandro, Maldonado Vega, María
Source:
International journal of phytoremediation 2015 v.17 no.5 pp. 405-413
ISSN:
1549-7879
Subject:
Claroideoglomus claroideum, Glomus intraradices, Helianthus annuus, Hordeum vulgare, absorption, barley, calcium, crops, inoculum, iron, lead, mycorrhizal fungi, phytoremediation, plant development, plant growth, roots, shoots, slags, sodium
Abstract:
The effect of an arbuscular mycorrhizal fungi (AMF) consortium conformed by (Glomus intraradices , Glomus albidum , Glomus diaphanum , and Glomus claroideum) on plant growth and absorption of Pb, Fe, Na, Ca, and ³²P in barley (Hordeum vulgare L.) and sunflower (Helianthus annuus L.) plants was evaluated. AMF-plants and controls were grown in a substrate amended with powdered Pb slag at proportions of 0, 10, 20, and 30% v/v equivalent to total Pb contents of 117; 5,337; 13,659, and 19,913 mg Pb kg ⁻¹ substrate, respectively. Mycorrhizal root colonization values were 70, 94, 98, and 90%, for barley and 91, 97, 95, and 97%, for sunflower. AMF inoculum had positive repercussions on plant development of both crops. Mycorrhizal barley absorbed more Pb (40.4 mg Pb kg ⁻¹) shoot dry weight than non-colonized controls (26.5 mg Pb kg ⁻¹) when treated with a high Pb slag dosage. This increase was higher in roots than shoots (650.0 and 511.5 mg Pb kg ⁻¹ root dry weight, respectively). A similar pattern was found in sunflower. Plants with AMF absorbed equal or lower amounts of Fe, Na and Ca than controls. H. vulgare absorbed more total P (1.0%) than H. annuus (0.9%). The arbuscular mycorrizal consortium enhanced Pb extraction by plants.
Agid:
1219804