High-Throughput MicroRNA and mRNA Sequencing Reveals that MicroRNAs May Be Involved in Pectinesterase-Mediated Cold Resistance in Potato |
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Authors: | Chongchong Yan Qianqian Wang Nan Zhang Jiajia Wang Xuexiang Ren Bingjie Xue Xiaojing Pu Zhihong Xu Huajun Liao |
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Institution: | 1 Anhui Academy of Agricultural Sciences, Hefei, 230031, China2 Anhui Vocational College of City Management, Hefei, 231635, China3 Funan County Agricultural Technology Promotion Center, Funan, 236300, China4 Jieshou County Agricultural Technology Promotion Center, Jieshou, 236500, China |
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Abstract: | Since potato cultivars are sensitive to low temperature, cold injury
severely affects the geographical distribution and yield of potato. Although some
miRNAs have been identified in response to cold stress in plants, there is no
report about the role of miRNAs in the response to cold stress in potato. Here,
via high throughput sequencing, we described the profiling of cold stress response
to miRNA and mRNA in potato. Two small RNA and six mRNA libraries were
constructed and sequenced. 296 known and 211 novel miRNAs were identified, in
which 34 miRNAs in Cold Group (CG) had the higher expression quantity
than which in Normal Group (NG) and 32 in CG had lower expression quantity
than which in NG. 3068 differentially expressed genes were detected between
NG and CG, in which 1400 genes were up-regulated and 1668 genes were
down-regulated. The metabolism pathway of starch and sucrose (ko00500) is
the common KEGG pathway in differentially expressed miRNA and mRNA. In
this pathway, StuPME21575 and StuPME42971 are pectinesterase which mainly
catalyzes the pectin-forming pectate, which are controlled by stu-miR6023 and
stu-novel-miR42365. As the potato suffering cold stress, these two miRNAs
expression levels became higher, but their target genes expression levels were just
opposite and this result is the same with qRT-PCR. |
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Keywords: | Potato microRNA RNA-Seq low-temperature stress pectinesterase Abbreviati |
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