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The chromosome-level genome provides insight into the molecular mechanism underlying the tortuous-branch phenotype of Prunus mume. | LitMetric

The chromosome-level genome provides insight into the molecular mechanism underlying the tortuous-branch phenotype of Prunus mume.

New Phytol

Beijing Key Laboratory of Ornamental Plants, Germplasm Innovation & Molecular Breeding, National Engineering Research Centre for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, Engineering Research Center of the Landscape Environment of the Ministry of Education, Key Laboratory of Genetics and Breeding of Forest Trees and Ornamental Plants of the Ministry of Education, School of Landscape Architecture, Beijing Forestry University, Beijing, 100083, China.

Published: July 2022

AI Article Synopsis

Article Abstract

Plant with naturally twisted branches is referred to as a tortuous-branch plant, which have extremely high ornamental value due to their zigzag shape and the natural twisting of their branches. Prunus mume is an important woody ornamental plant. However, the molecular mechanism underlying this unique trait in Prunus genus is unknown. Here, we present a chromosome-level genome assembly of the cultivated P. mume var. tortuosa created using Oxford Nanopore combined with Hi-C scaffolding, which resulted in a 237.8 Mb genome assembly being anchored onto eight pseudochromosomes. Molecular dating indicated that P. mume is the most recently differentiated species in Prunus. Genes associated with cell division, development and plant hormones play essential roles in the formation of tortuous branch trait. A putative regulatory pathway for the tortuous branch trait was constructed based on gene expression levels. Furthermore, after transferring candidate PmCYCD genes into Arabidopsis thaliana, we found that seedlings overexpressing these genes exhibited curled rosette leaves. Our results provide insights into the evolutionary history of recently differentiated species in Prunus genus, the molecular basis of stem morphology, and the molecular mechanism underlying the tortuous branch trait and highlight the utility of multi-omics in deciphering the properties of P. mume plant architecture.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9299681PMC
http://dx.doi.org/10.1111/nph.17894DOI Listing

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