Abstract
Seven endophytic yeast strains were isolated from tangerine peel (Citrus reticulata Blanco) and genotyped through clustering with D1/D2 and ITS1-5.8S-ITS2 sequences from GenBank. Phenotypic characteristics were obtained through commercial kits and through assisted species identification. Indole-3-acetic acid (IAA) production by the yeast strains was assessed using Salkowski reagent and High-Performance Liquid chromatography (HPLC). The growth-promoting effects of the yeast were evaluated using the ‘ragdoll’ method. CRYb1, CRYb2 and CRYb7 isolates were identified as the closest species Hanseniaspora opuntiae. CRYb3 was identified as Pichia kluyveri. CRYb4, CRYb5 and CRYb6 were identified as Meyerozyma guilliermondii. CRYb1, CRYb5, CRYb6 and CRYb7 were found to be capable of IAA production. The most promising yeast strains now require further evaluation for their ability to promote plant growth in vitro and in vivo. These data increase our knowledge of the distribution and biological properties of endophytic yeast. This is important information that will be required to fully harness the growth-promoting properties of yeast strains.
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Acknowledgements
This work was supported in part by Lanzhou Science and Technology Plan Project 2018-1-104; Northwest Normal University Innovation Capacity Improvement Program CXCY2018B009; Gansu International Science and Technology Cooperation Special 1504WKCA028.
Funding
This study was funded by Lanzhou Science and Technology Plan Project (2018-1-104); Northwest Normal University Innovation Capacity Improvement Program (Grant No. CXCY2018B009); Gansu International Science and Technology Cooperation Special (Grant No. 1504WKCA028).
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Ling, L., Li, Z., Jiao, Z. et al. Identification of Novel Endophytic Yeast Strains from Tangerine Peel. Curr Microbiol 76, 1066–1072 (2019). https://doi.org/10.1007/s00284-019-01721-9
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DOI: https://doi.org/10.1007/s00284-019-01721-9