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Shaping plant architecture.
Thomas Teichmann1, Merlin Muhr1
1Plant Cell Biology, Georg-August-Universität Göttingen, Göttingen Germany.
Frontiers in Plant Science
|April 28, 2015
Summary
Plant architecture is shaped by environmental factors and regulated by hormones like auxin and strigolactones. Understanding key genes controlling branching is crucial for improving crop yield and plant breeding.
Area of Science:
- Plant biology
- Developmental biology
- Genetics
Background:
- Plants display phenotypic plasticity, adjusting architecture and branching to environmental cues.
- Modular plant design facilitates morphological adaptations, with axillary meristem initiation being key for branch formation.
Purpose of the Study:
- To review current knowledge on axillary meristem initiation and bud outgrowth regulation.
- To discuss the role of endogenous and exogenous factors, phytohormones, and transcription factors in plant architecture.
- To explore the economic significance of plant architecture and its modification through domestication and breeding.
Main Methods:
- Review of existing literature on plant architecture, meristem development, and hormonal regulation.
- Analysis of regulatory networks involving auxin, strigolactones, and transcription factors like BRANCHED1.
- Examination of genetic changes during plant domestication and breeding programs.
Main Results:
- Branch formation depends on axillary meristem initiation, influenced by factors like photoassimilate, nutrients, and shading.
- Apical dominance, regulated by auxin and modulated by strigolactones, plays a role in bud outgrowth.
- Key genes controlling plant architecture have been targets of selection during domestication and breeding.
Conclusions:
- The complex interplay of factors regulating plant architecture is still being elucidated, with ongoing research into alternative models.
- Understanding plant architecture is vital for improving crop yield, management, and developing new breeding strategies.
- Breeding and biotechnological approaches offer potential for further optimizing plant architecture for economic benefits.

