Metal decontamination of tannery solid waste using Tagetes patula in association with saprobic and mycorrhizal fungi

Abstract

A greenhouse trial was conducted to investigate the role of mycorrhizal and resistant fungi on heavy metal phytoextraction from different concentrations of tannery solid waste amended soil (10, 20, 50, and 100%) by Tagetes patula. The four treatments included were, the control (C) without any inoculum, mycorrhizal (M) inoculated with strongly mycorrhizal roots of Cynodon dactylon, fungal (F) inoculated with Trichoderma pseudokoningii and the combined inoculation with both mycorrhizal and fungal inocula (M ? F). The dual inoculation increased plant biomass and phytoextraction ability of plant for metals like Cd, Cr, Cu, and Na. Plants given only fungus (F) and only mycorrhizal (M) treatment also showed significant growth rate as compared with control treatment. The statistical analysis of data indicated synergistic interaction between mycorrhizal and fungal inoculum promoting high biomass and enhanced metal phytoextraction. Thus using more than one group of rhizosphere fungi in association with a high biomass producing plant may be employed for rendering tannery solid waste free of metals.

Hemarthria compressa—Aspergillus niger—Trichoderma pseudokoningii Mediated Trilateral Perspective for Bioremediation and Detoxification of Industrial Paper Sludge

“…Three healthy plants of Hemarthria compressa having uniform sizes were grown in each pot. The fungal inoculums (10 mL/pot) were applied after every two weeks by following Bareen and Nazir [33]. The metal analysis of paper sludge was carried out before the experiment was set up for each treatment.…”

The Influence of Bottom Sediments and Inoculation with Rhizobacterial Inoculants on the Physiological State of Plants Used in Urban Plantings

“…Moreover, when PGPB was used to seed bacterization, plants show enhanced root and shoot length, biomass and biochemical parameters such as chlorophyll, carotenoid and protein content [49]. Otherwise excellent works on the remediation capabilities of T. patula provide no information on the impact of using bacterial strains during remediation, or their significance for these plants [31,32]. Our present findings indicate that as in the case of plant morphology, F. arundinacea did not show major changes in biomass yield following sediment treatment; however, the use of RP92 strain on soil without sediment had a promoting effect.…”

“…These compounds may be variably excreted by the plant in response to altering environmental conditions and have been shown to have antimicrobial, insecticidal and nematicidal effects [29,30]. It has been reported that T. patula is a very effective plant in benzo[a]pyrene remediation and offers substantial potential for soil metal remediation [31,32].…”

Characterization of a novel male sterile mutant of Tagetes patula induced by heat shock

“…The species is also used as a companion plant for the protection of crops against nematodes by virtue of the secretion of the chemical alpha-terthienyl from its root tissues (Liu et al 2011). This species has also been reported to have the potential for application in soil metal remediation (Bareen and Nazir 2010;Liu et al 2011). Cultivars of T. patula are widely grown for ornamental purposes, both as annual garden plants and for the production of cut flowers, and its popularity is due in part to the ease of cultivation .…”