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Physiological and transcriptomic analyses of brassinosteroid function in moso bamboo (Phyllostachys edulis) seedlings
Zhe Zhang1, Xuelian Yang1,2, Ling Cheng1,3
1Basic Forestry and Proteomics Research Center, Forestry College, Fujian Agriculture and Forestry University, Fuzhou, China.
Planta
|July 27, 2020
Summary
Brassinosteroid (BR) is crucial for moso bamboo shoot growth. This study reveals BR
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Moso bamboo exhibits extremely rapid shoot growth, but the underlying phytohormone mechanisms are not fully understood.
- Phytohormones play critical roles in plant development, including growth and elongation.
Purpose of the Study:
- To investigate the role of brassinosteroid (BR) in the rapid shoot elongation of moso bamboo.
- To identify BR-responsive genes involved in bamboo shoot growth.
Main Methods:
- Inhibition of endogenous brassinosteroid (BR) biosynthesis using propiconazole.
- Application of exogenous BR to bamboo seedlings.
- Genome-wide transcriptome analysis of BR- and propiconazole-treated bamboo shoots and roots.
Main Results:
- Reducing endogenous BR levels significantly stunted moso bamboo shoot growth.
- Exogenous BR application promoted scale leaf elongation and lamina joint inclination.
- BR influences the expression of cell wall-related, hydrogen peroxide catabolic, and auxin-related genes.
Conclusions:
- Brassinosteroid (BR) is an essential phytohormone regulating internode elongation and overall shoot growth in moso bamboo.
- This study identifies numerous BR-responsive genes, providing insights into the molecular mechanisms of rapid bamboo growth.
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