Effects of Heavy Metal-Tolerant Microorganisms on the Growth of “Narra” Seedlings

Erny Yuniarti, Ida F. Dalmacio, Virginia C. Cuevas, Asuncion K. Raymundo, Erlinda S. Paterno, Nina M. Cadiz, Dwi N. Susilowati, Karden Mulya, Surono, Ikhwani, Heni Purwaningsih, Arif Anshori, Kristamtini () and Nani Radiastuti
Additional contact information
Erny Yuniarti: Research Center for Horticultural and Estate Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Ida F. Dalmacio: Institue of Biological Science, University of the Philippines Los Banos, Los Banos 4031, Philippines
Virginia C. Cuevas: Institue of Biological Science, University of the Philippines Los Banos, Los Banos 4031, Philippines
Asuncion K. Raymundo: Institue of Biological Science, University of the Philippines Los Banos, Los Banos 4031, Philippines
Erlinda S. Paterno: Departement of Soil Science, Agricultural System Institute, College of Agriculture and Food Science, University of the Philippnes Los Banos, Los Banos 4031, Philippines
Nina M. Cadiz: Institue of Biological Science, University of the Philippines Los Banos, Los Banos 4031, Philippines
Dwi N. Susilowati: Research Center for Horticultural and Estate Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Karden Mulya: Research Center for Horticultural and Estate Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Surono: Research Center for Applied Microbiology, Research Organization for Life Sciences and Environment, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Ikhwani: Research Center for Food Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Heni Purwaningsih: Research Center for Food Technology and Processing, National Research and Innovation Agency (BRIN), Yogyakarta 55861, Indonesia
Arif Anshori: Research Center for Food Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Kristamtini: Research Center for Food Crops, Research Organization for Agriculture and Food, Cibinong Science Center, National Research and Innovation Agency (BRIN), Bogor 16911, Indonesia
Nani Radiastuti: Faculty of Science and Technology, UIN Syarif Hidayatullah, Banten 15412, Indonesia

Sustainability, 2022, vol. 14, issue 15, 1-14

Abstract: The effectiveness of heavy metal-tolerant microorganisms for supporting plant growth needs to be understood before it can be used as a soil bioremediation agent. The purpose of this study was to determine the effect of heavy metal tolerant microorganisms on the growth of “Narra” seedling ( Pterocarpus indicus Wild). Three heavy metals-resistant (Pb, Cd, and Cu) rhizobacteria from a copper (Cu) mined-out site in Marinduque, Philippines showed plant growth promotion in vitro. A treatment combination of formula inoculant A (CuNFbM 4.1, MGR 333), B (CuNFbM 4.1, MGR 333, PbSM 2.1), and O (Uninoculated); compost (0%, 4%); and lime + inorganic fertilizer {without or with lime and inorganic fertilizer (LF0; LF1)} were applied to Narra seedlings planted on 445 mg/kg Cu-contaminated soil. Lime (2 mg/ha) and the recommended dose of soybean inorganic fertilizer were used as positive controls to evaluate the ability of inoculations and composts to promote the growth and used as positive controls to evaluate the ability of inoculants and composts to promote the growth and copper accumulation of narra in greenhouse experiments. All treatment combinations resulted in significant differences in plant height, leaf number, stem diameter, shoot and root dry weight, as well as, shoot, root Cu content, and plant Cu uptake of 13-week-old “Narra”. Inoculated “Narra” could thrive better in mine-degraded soil containing 445 ppm Cu with 4% compost. Inoculant B demonstrated the best plant performance while Pseudomonas synxantha (PbSM 2.1) probably increases the plant’s growth due to 1-aminocyclopropane-1-carboxylate (ACC) deaminase it produces. Accumulation of Cu was higher in the root compared other plant parts. More research is necessary to elucidate the mechanism of plant growth promotion and heavy metal re mediation by P. synxantha .

Keywords: heavy metal; tolerance; microorganism; growth; “Narra” seedling (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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