Barbaccia Pietro, Gaglio Raimondo, Dazzi Carmelo, Miceli Claudia, Bella Patrizia, Lo Papa Giuseppe, Settanni Luca
Dipartimento Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, 90128 Palermo, Italy.
Council for Agricultural Research and Economics, Plant Protection and Certification Centre, 90121 Palermo, Italy.
Microorganisms. 2022 Oct 31;10(11):2167. doi: 10.3390/microorganisms10112167.
Bacteria producers of plant growth-promoting (PGP) substances are responsible for the enhancement of plant development through several mechanisms. The purpose of the present work was to evaluate the PGP traits of 63 bacterial strains that were isolated from an anthropogenic soil, and obtained by modification of vertisols in the Sicily region (Italy) seven years after creation. The microorganisms were tested for the following PGP characteristics: indole acetic acid (IAA), NH, HCN and siderophore production, 1-aminocyclopropane-1-carboxylate deaminase activity (ACC) and phosphate solubilization. The results of principal component analysis (PCA) showed that SI 319, SI 433, SI 287 and SI 307 expressed high levels of IAA and production of ACC deaminase enzyme, while for the rest of traits analyzed the best performances were registered with genus, in particular for the strains SI 443, SI 441 and SI 422 and SI 450. The in vitro screening provided enough evidence for future in vivo growth promotion tests of these eight strains.
产生促进植物生长（PGP）物质的细菌通过多种机制促进植物生长。本研究的目的是评估从人为土壤中分离出的63株细菌菌株的PGP特性，这些菌株是在意大利西西里岛地区的变性土改良七年后获得的。对这些微生物进行了以下PGP特性测试：吲哚乙酸（IAA）、NH、HCN和铁载体的产生、1-氨基环丙烷-1-羧酸脱氨酶活性（ACC）和磷溶解。主成分分析（PCA）结果表明，SI 319、SI 433、SI 287和SI 307表现出高水平的IAA和ACC脱氨酶活性，而对于其他分析的特性，表现最佳的是[未明确的属名]属，特别是SI 443、SI 441、SI 422和SI 450菌株。体外筛选为这八株菌株未来的体内生长促进试验提供了充分的证据。
