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Comparative transcriptomic analysis uncovers conserved pathways involved in adventitious root formation in poplar.

Jie Luo^1,2, Tashbek Nvsvrot¹, Nian Wang^1,2

¹College of Horticulture and Forestry Sciences, Hubei Engineering Technology Research Center for Forestry Information, Huazhong Agricultural University, Wuhan, 430070 China.

Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology

|October 11, 2021

Summary

Researchers identified conserved genes and pathways critical for adventitious root (AR) formation in poplar species. This study reveals a finely tuned transcriptomic regulation integrating multiple biological processes for efficient AR development in poplars.

Keywords:

Adventitious root formation Comparative transcriptome Hormones Poplar

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Area of Science:

Plant Biology
Molecular Biology
Genetics

Background:

Cutting propagation is vital for poplar plantations, relying on efficient adventitious root (AR) formation.
Interspecific variations in AR formation exist despite poplars generally rooting easily.

Purpose of the Study:

To elucidate the gene regulatory network for AR formation in poplar.
To identify conserved genes and pathways essential for AR development across different poplar species.

Main Methods:

Comparative transcriptomic analysis of two poplar species (Populus × euramericana and P. simonii).
Identification of conserved differentially expressed genes during AR formation.
Gene co-expression network analysis to identify functional modules.

Main Results:

Identified 2146 conserved genes with similar expression profiles during AR formation.
Conserved genes are enriched in hormone signaling and MAPK signaling pathways.
Co-expression network analysis revealed modules related to defense response, hormone signaling, and cell cycle.

Conclusions:

Poplar AR formation is regulated by a conserved transcriptomic machinery.
Signaling transduction pathways play a crucial role in coordinating AR formation.
Gene co-expression networks provide insights into the molecular basis of AR formation in poplars.