Exploring miRNAs involved in blue/UV-A light response in Brassica rapa reveals special regulatory mode during seedling development

BMC Plant Biology

Research Article

Haifang Yan¹  Pengzhen Fan¹  Bo Zhou²  Yuhua Li²  Qijiang Xu² 

[1] College of Life Science, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China;College of Life Science, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China;State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040, Harbin, China;

关键词: Brassica rapa;    High-throughput sequencing;    Light response;    microRNA;    cv. Tsuda;    Turnip;    Anthocyanin biosynthesis;   

DOI  :  10.1186/s12870-016-0799-z

 received in 2015-11-16, accepted in 2016-05-03,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundGrowth, development, and pigment synthesis in Brassica rapa subsp. rapa cv. Tsuda, a popular vegetable crop, are influenced by light. Although microRNAs (miRNAs) have vital roles in the metabolic processes and abiotic stress responses of plants, whether miRNAs play a role in anthocyanin biosynthesis and development of Tsuda seedlings exposed to light is unknown.ResultsSeventeen conserved and 226 novel miRNAs differed at least 2-fold in response to blue and UV-A light compared with levels after a dark treatment. Real time PCR showed that BrmiR159, BrmiRC0191, BrmiRC0460, BrmiRC0323, BrmiRC0418, BrmiRC0005 were blue light-induced and northern blot revealed that the transcription level of BrmiR167 did not differ significantly among seedlings treated with dark, blue or UV-light. BrmiR156 and BrmiR157 were present in the greatest amount (number of reads) and among their 8 putative targets in the SPL gene family, only SPL9 (Bra004674) and SPL15 (Bra003305) increased in expression after blue or UV-A exposure. In addition, miR157-guided cleavage of target SPL9 mRNAs (Bra004674, Bra016891) and SPL15 mRNAs (Bra003305, Bra014599) took place 10 or 11 bases from the 5′ ends of the binding region in the miR157 sequence.ConclusionsA set of miRNAs and their targets involved in the regulation of the light-induced photomorphogenic phenotype in seedlings of Brassica rapa was identified, providing new insights into blue and UV-A light-responsive miRNAs in seedlings of Tsuda and evidence of multiple targets for the miRNAs and their diverse roles in plant development.

【 授权许可】

CC BY   
© Zhou et al. 2016