| Title: | Microbial Volatile Organic Compound (VOC)-Driven Dissolution and Surface Modification of Phosphorus-Containing Soil Minerals for Plant Nutrition: An Indirect Route for VOC-Based Plant-Microbe Communications |
| Author(s): | Barghi A; Esposti LD; Iafisco M; Adamiano A; Casado GE; Ivanchenko P; Mino L; Yoon HY; Joe EN; Jeon JR; Chang YS; |
| Address: | "Division of Environmental Science and Engineering, Pohang University of Science and Technology (P.O.STECH), 77 Cheongam-ro, Pohang 37673, Republic of Korea. Institute of Science and Technology for Ceramics (ISTEC), National Research Council (CNR), Via Granarolo 64, Faenza (RA) 48018, Italy. Department of Chemistry and NIS Centre, University of Torino, Via Giuria 7, Torino 10125, Italy. ETEC Department, MOBI Research Group, Belgium Flanders Make, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 3001 Heverlee, Brussels 1050, Belgium. Division of Applied Life Science (BK21Plus), Department of Agricultural Chemistry and Food Science & Technology and IALS, Gyeongsang National University, Jinju 52828, Republic of Korea" |
| ISSN/ISBN: | 1520-5118 (Electronic) 0021-8561 (Linking) |
| Abstract: | "We investigated the ability of microbial volatile organic compounds (MVOCs) emitted by Bacillus megaterium (a well-known MVOC producer) to modify the dissolution kinetics and surface of hydroxyapatite, a natural soil mineral. Facilitated phosphate release was induced by the airborne MVOCs in a time-dependent manner. Use of each standard chemical of the MVOCs then revealed that acetic and oxalic acids are crucial for the phenomenon. In addition, the ability of such MVOCs to engineer the apatite surfaces was evidenced by FT-IR spectra showing the COO(-) band variation with incubation time and the prolonged acceleration of phosphate release during the negligible acidification of the hydroxyapatite-containing solutions. The formation of calcium oxalate was revealed through SEM-EDS and XRD analyses, suggesting that MVOC oxalic acid interacts with calcium ions, leading to the precipitation of calcium oxalate, thus preventing the recrystallization of calcium phosphates. Gel- and soil-based plant cultivation tests employing Arabidopsis thaliana and solid calcium phosphates (i.e., nano- and microsized hydroxyapatites and calcium phosphate dibasic) demonstrated that these MVOC mechanisms facilitate plant growth by ensuring the prolonged supply of plant-available phosphate. The relationship between the growth enhancement and the particle size of the calcium phosphates also substantiated the MVOC sorption onto soil minerals related to plant growth. Given that most previous studies have assumed that MVOCs are a molecular lexicon directly detected by the dedicated sensing machinery of plants, our approach provides a new mechanistic view of the presence of abiotic mediators in the interaction between plants and microbes via MVOCs" |
| Keywords: | "Minerals Phosphorus Soil Solubility Spectroscopy, Fourier Transform Infrared *Volatile Organic Compounds calcium phosphate microbial volatile organic compounds plant nutrition plant-microbe interaction surface engineering;" |
| Notes: | "MedlineBarghi, Anahita Esposti, Lorenzo Degli Iafisco, Michele Adamiano, Alessio Casado, Guillermo Escolano Ivanchenko, Pavlo Mino, Lorenzo Yoon, Ho Young Joe, Eun-Nam Jeon, Jong-Rok Chang, Yoon-Seok eng 2021/11/24 J Agric Food Chem. 2021 Dec 8; 69(48):14478-14487. doi: 10.1021/acs.jafc.1c05187. Epub 2021 Nov 23" |
