Heteroexpression of Osa-miR319b improved switchgrass biomass yield and feedstock quality by repression of PvPCF5

doi:10.1186/s13068-020-01693-0

	Heteroexpression of Osa-miR319b improved switchgrass biomass yield and feedstock quality by repression of PvPCF5
	Liu, Yanrong 1,2; Yan, Jianping 2; Wang, Kexin 2; Li, Dayong 4; Han, Yejun 5; Zhang, Wanjun 2,3
刊名	BIOTECHNOLOGY FOR BIOFUELS
	2020-03-19
卷号	13 期号:1 页码:13
关键词	Switchgrass MiR319 PvPCF5 Lignin Biomass yield
DOI	10.1186/s13068-020-01693-0
英文摘要	Background Switchgrass (Panicum virgatum L.), a C-4 perennial grass, has been recognized as one of the most potentially important lignocellulose biofuel crops. MicroRNA319 (miR319) plays a key role in plant development, abiotic resistance, and cell wall biosynthesis by repressing expression of its target TCP genes. We hypothesized miR319-TCP pathway could play important roles in switchgrass feedstock characteristics for biofuel production, and produced switchgrass transgenic plants overexpressing miR319 (by ectopic expressing Osa-MIR319b gene), blocking miR319 (by overexpressing a target mimicry of miR319/MIM319) and repression of miR319 target gene PvPCF5. Plant phenotype, biomass yield, and feedstock quality of transgenic plants were analyzed. Results Overexpression of miR319 in switchgrass promoted leaf elongation and expansion of transgenic plants, increased plant height, stem diameter, and resulted in a significant increase in plant biomass yield. Transgenic plants overexpressing of miR319 reduced lignin content, showed significantly higher enzymatic hydrolysis efficiency compared to the wild type plant. However, opposite results were observed in the MIM319 plants. Furthermore, suppression of miR319 target gene PvPCF5 activity also reduced lignin content, increased lignin monomer S/G ratio and the proportion of beta-O-4 linkages, while significantly improving the sugar production per plant. Quantitative real-time (qRT-PCR) analysis indicated that expression of PvMYB58/63B and PvHCT with predicted TCP binding sites in their promoter regions was negatively regulated by miR319-PvPCF5 module. Conclusions MiR319-PvPCF5 module plays positive roles in regulating biomass yield and quality of switchgrass. It can be utilized as a candidate molecular tool in regulating biomass yield and feedstock quality. The finding could also be transferred to other grasses for forage quality improvement through genetic manipulation.
资助项目	Beijing Natural Science Foundation[6192011] ; National Natural Science Foundation of China[31770280]
WOS关键词	CELL-WALL BIOSYNTHESIS ; PANICUM-VIRGATUM L. ; TRANSCRIPTION FACTORS ; LIGNIN ; EXPRESSION ; ACID ; ENZYMES ; MIR319 ; OVEREXPRESSION ; TOLERANCE
WOS研究方向	Biotechnology & Applied Microbiology ; Energy & Fuels
语种	英语
出版者	BMC
WOS记录号	WOS:000521479900001
资助机构	Beijing Natural Science Foundation ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/39817]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Wanjun
作者单位	1.China Agr Univ, Coll Biol Sci, Beijing 100193, Peoples R China 2.China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China 3.China Agr Univ, Natl Energy R&D Ctr Biomass NECB, Beijing 100193, Peoples R China 4.Beijing Acad Agr & Forestry Sci, BVRC, Natl Engn Res Ctr Vegetables, Beijing 100097, Peoples R China 5.Chinese Acad Sci, Natl Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yanrong,Yan, Jianping,Wang, Kexin,et al. Heteroexpression of Osa-miR319b improved switchgrass biomass yield and feedstock quality by repression of PvPCF5[J]. BIOTECHNOLOGY FOR BIOFUELS,2020,13(1):13.
APA	Liu, Yanrong,Yan, Jianping,Wang, Kexin,Li, Dayong,Han, Yejun,&Zhang, Wanjun.(2020).Heteroexpression of Osa-miR319b improved switchgrass biomass yield and feedstock quality by repression of PvPCF5.BIOTECHNOLOGY FOR BIOFUELS,13(1),13.
MLA	Liu, Yanrong,et al."Heteroexpression of Osa-miR319b improved switchgrass biomass yield and feedstock quality by repression of PvPCF5".BIOTECHNOLOGY FOR BIOFUELS 13.1(2020):13.