title: Comparison of the spores of Paenibacillus polymyxa prepared at different temperatures.
abstract: Paenibacillus polymyxa SQR-21, which is antagonistic against Fusarium oxysporum, is used as a biocontrol agent and, when mixed with organic substances for solid fermentation, produces a bioorganic fertilizer. The spores of P. polymyxa prepared at different temperatures were characterized with respect to the dipicolinic acid content, heat resistance, fatty acid composition and germination. Spores prepared at 37°C showed higher heat resistance than those prepared at 25 and 30°C. However, the germination rate was negatively correlated with the sporulation temperature. The maximum germination rate of the spores prepared at 25°C was 1.3-times higher than the spores prepared at 30°C. The sporulation temperature thus affects the resistance and germination properties of P. polymyxa spores. These results are useful for the production of improved bio-organic fertilizer.
authors.affiliation: Jiangsu Key Laboratory for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, 210095, China. 2007203021@njau.edu.cn
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Huo
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.forename: Waseem
authors.initials: W
authors.lastname: Raza
authors.forename: Xinqi
authors.initials: X
authors.lastname: Huang
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Yong
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Liu
authors.forename: Dandan
authors.initials: D
authors.lastname: Wang
authors.forename: Shuqing
authors.initials: S
authors.lastname: Li
authors.forename: Qirong
authors.initials: Q
authors.lastname: Shen
authors.forename: Ruifu
authors.initials: R
authors.lastname: Zhang
mesh_terms: D005227:Fatty Acids / Q000032:analysis; D050296:Microbial Viability / Q000187:drug effects; D056507:Paenibacillus / Q000737:chemistry / Q000254:growth & development* / Q000502:physiology / Q000528:radiation effects*; D010848:Picolinic Acids / Q000032:analysis; D013171:Spores, Bacterial / Q000737:chemistry / Q000254:growth & development* / Q000502:physiology / Q000528:radiation effects*; D013696:Temperature
chemical_list: D005227:Fatty Acids; D010848:Picolinic Acids; C004860:dipicolinic acid