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  • Title: Phytobacter palmae sp. nov., a novel endophytic, N2 fixing, plant growth promoting Gammaproteobacterium isolated from oil palm (Elaeis guineensis Jacq.).
    Author: Madhaiyan M, Saravanan VS, Blom J, Smits THM, Rezzonico F, Kim SJ, Weon HY, Kwon SW, Whitman WB, Ji L.
    Journal: Int J Syst Evol Microbiol; 2020 Feb; 70(2):841-848. PubMed ID: 31829916.
    Abstract:
    A novel strain S29T with high nitrogen fixing ability was isolated from surface-sterilized leaf tissues of oil palm (Elaeis guineensis) growing in Science Park II, Singapore. On the basis of 16S rRNA gene analysis and multilocus sequence typing with the rpoB, gyrB, infB and atpD genes, strain S29T was a member of the genus Phytobacter, with Phytobacter ursingii ATCC 27989T and Phytobacter diazotrophicus LS 8T as its closest relatives. Unique biochemical features that differentiated strain S29T from its closest relatives were the ability to utilize melibiose, α-cyclodextrin, glycogen, adonital, d-arabitol, m-inositol and xylitol. The major fatty acids were C14 : 0, C16 : 0, C17 : 0, C16 : 1 ω5c and summed feature 2 containing C16 : 1 ω7c and/or C16 : 1 ω6c. The polar fatty acid profile consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, an unidentified aminophospholipid and aminolipids. The draft genome of strain S29T comprised 5, 284, 330 bp with a G + C content of 52.6 %. The average nucleotide identity and digital DNA-DNA hybridization values between strain S29T and the phylogenetically related Enterobacterales species were lower than 95 % and 70 %, respectively. Thus, the polyphasic evidences generated through the phenotypic, chemotaxonomic and genomic methods confirmed that strain S29T represents a novel species of the genus Phytobacter, for which we propose the name Phytobacter palmae sp. nov. with the type strain of S29T (=DSM 27342T=KACC 17598T).
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