title: The role of a phospholipase (PLD) in virulence of Purpureocillium lilacinum (Paecilomyces lilacinum).
abstract: Phospholipases are key enzymes in pathogenic fungi that cleave host phospholipids, resulting in membrane destabilization and host cell penetration. However, understanding the role of phospholipases on the virulence of the filamentous fungus Purpureocillium lilacinum has been still rather limited. In this study, pld gene was characterized. It encodes the protein phospholipase D (PLD) in P. lilacinum. This gene, 3303 bp open reading frame fragment (ORF), encodes a protein of 1100 amino acids with high similarity to the same gene from Penicillium oxalicum and Aspergillus fumigatus. Secondary structure prediction showed two PLD phosphodiesterase domains (437-464 bp and 885-912 bp). The pld gene was significantly regulated during infection of Meloidogyne incognita eggs by P. lilacinum. The expression of pld gene using RT-PCR was the highest at 36 and 48 h, which introduce evidence that the presence of M. incognita may induce the expression of the pld gene in P. lilacinum. In addition, maltose and l-alanine were found to increase the expression of pld gene. An acidic environment (pH 3.0-4.0) and moderate temperatures (27-29 °C) are favorable for pld expression in P. lilacinum.
authors.affiliation: Key Laboratory of Plant Pathology of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.affiliation: Key Laboratory of Plant Pathology of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Department of Plant Protection, Faculty of Agriculture, Benha University, Qaliubia 13736, Egypt.
authors.forename: Hazem
authors.initials: H
authors.lastname: Abdelnabby
authors.affiliation: Key Laboratory of Plant Pathology of Hubei Province, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Electronic address: xiaoyannong@mail.hzau.edu.cn.
authors.forename: Yannong
authors.initials: Y
authors.lastname: Xiao
mesh_terms: D000818:Animals; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D006790:Host-Parasite Interactions; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010143:Paecilomyces / Q000145:classification / Q000201:enzymology* / Q000235:genetics / Q000472:pathogenicity; D010739:Phospholipase D / Q000235:genetics / Q000378:metabolism*; D010802:Phylogeny; D014431:Tylenchoidea / Q000382:microbiology*; D014774:Virulence
chemical_list: D005656:Fungal Proteins; D010739:Phospholipase D
keywords: Leucinostatins A; Meloidogyne incognita; Phospholipase D (PLD); Purpureocillium lilacinum