Abstract:
KEY MESSAGE:Lack of structural components results in inflorescence stem bending. Differentially expressed genes involved in lignin and hemicellulose biosynthesis are vital; genes involved in cellulose and glycan biosynthesis are also relevant. An erect inflorescence stem is essential for high-quality cut herbaceous peony flowers. To explore the factors underlying inflorescence stem bending, major cell walls contents were measured, and stem structure was observed in two herbaceous peony varieties with contrasting stem straightness traits ('Da Fugui', upright; 'Chui Touhong', bending). In addition, Illumina sequencing was performed and weighted correlation network analysis (WGCNA) was used to analyze the results. The results showed significant differences in lignin, hemicellulose and soluble sugar contents, sclerenchyma and xylem areas and thickening in cell walls in pith at stage S3, when bending begins. In addition, 44,182 significantly differentially expressed genes (DEGs) were found, and these DEGs were mainly enriched in 36 pathways. Among the DEGs, hub genes involved in lignin, cellulose, and xylan biosynthesis and transcription factors that regulated these process were identified by WGCNA. These results suggested that the contents of compounds that provided cell wall rigidity were vital factors affecting inflorescence stem straightness in herbaceous peony. Genes involved in or regulating the biosynthesis of these compounds are thus important; lignin and hemicellulose are of great interest, and cellulose and glycan should not be ignored. This paper lays a foundation for developing new herbaceous peony varieties suitable for cut flowers by molecular-assisted breeding.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Wan Y,Zhang M,Hong A,Lan X,Yang H,Liu Ydoi
10.1007/s11103-019-00945-4subject
Has Abstractpub_date
2020-02-01 00:00:00pages
239-252issue
3eissn
0167-4412issn
1573-5028pii
10.1007/s11103-019-00945-4journal_volume
102pub_type
杂志文章abstract:KEY MESSAGE:This manuscript describes the functions of an Argonaute protein named AGO17 in rice. AGO17 is required for the development of rice reproductive tissues. Argonaute (AGO) proteins are a well-conserved multigene family of regulators mediating gene silencing across eukaryotes. Monocot plants have additional mem...
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