期刊
JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY
卷 65, 期 3, 页码 111-120出版社
MICROBIOL RES FOUNDATION
DOI: 10.2323/jgam.2018.07.001
关键词
carotenoids; NaCl; salt-tolerance; Sporidiobolus pararoseus NGR; torulene; transcriptome
资金
- National Natural Science Foundation of China [31271818]
- National Key Research and Development Program of China [2017YFD200807-3]
- Natural Science Foundation of Liaoning Province of China [2015020763]
- Shenyang Science and Technology Innovation in Agriculture Special Fund [F17150-3-00]
Carotenoids represent a diverse class of aliphatic C40 molecules with a variety of applications in the food and pharmaceutical industries. Sporidiobolus pararoseus NGR produces various carotenoids, including torulene, torularhodin and beta-carotene. Salt stress significantly increases the torulene accumulation of S. pararoseus NGR. However, little is known, about the molecular mechanisms underlying the increased torulene biosynthesis. In this work, we investigated the effects of NaCl treatment on the contents of carotenoids (both qualitatively and quantitatively) and transcriptome. A total of 12.3 Gb of clean bases were generated in six cDNA libraries. These bases were de novo assembled into 9,533 unigenes with an average length of 1,654 nt and N50 of 2,371 nt. Transcriptome analysis revealed that of 3,849 differential expressed genes (DEGs) in response to salt stress, 2,019 were upregulated, and 1,830 were down-regulated. Among these DEGs, we identified three carotenogenic genes crtE, crtYB, and crtI. In addition, fourteen candidate genes were predicted to participate in the conversion from torulene to torularhodin. Our findings should provide insights into the mechanisms of carotenoid biosynthesis and salt-tolerance of S. pararoseus NGR.
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