Algoriphagus kandeliae sp. nov., isolated from mangrove rhizosphere soil

Abstract

Strain XY-J91^T, a Gram-stain-negative, reddish orange, non-spore-forming and short-rod-shaped marine bacterium, was isolated from rhizosphere soil of the mangrove plant Kandelia candel (L.) Druce in Mai Po Nature Reserve, Hong Kong. The strain showed growth at 15-50 °C (optimum 40 °C), at pH 5.5-9.5 (optimum 7.0-8.0) and with 0-8 % (w/v) NaCl (optimum 1-2 %). The only respiratory quinone was MK-7 and the major fatty acids were iso-C_{15 : 0} and iso-C_{17 : 0} 3-OH. The major polar lipids were phosphatidylethanolamine, an unidentified aminolipid and an unidentified phospholipid. The G+C content of strain XY-J91^T was 40.4 mol%. Strain XY-J91^T exhibited highest 16S rRNA gene sequence similarities to the type strains of Algoriphagus marincola SW-2^T (96.66 %), Algoriphagus taiwanensis CC-PR-82^T (96.21%), Algoriphagus ornithinivorans JC2052^T (96.16%), Algoriphagus confluentis HJM-2^T (95.73%) and Algoriphagus zhangzhouensis 12C11^T (95.52 %). Based on the phylogenetic, phenotypic and chemotaxonomic evidence presented, strain XY-J91^T represents a novel species of the genus Algoriphagus, for which the name Algoriphagus kandeliae sp. nov. is proposed. The type strain is XY-J91^T (=MCCC 1K03612^T=KCTC 72216^T).

Keywords: Algoriphagus kandeliae; Kandelia candel; mangrove; rhizosphere soil.