Plant cell morphogenesis: plasma membrane interactions with the cytoskeleton and cell wall

Area of Science:

• Plant Biology
• Cell Biology
• Developmental Biology

Background:

• Plant morphogenesis depends on precise control of cell expansion and division due to immobile cells.
• Cortical domains are crucial for cell polarity, division orientation, and daughter cell fate determination in diverse organisms.
• These domains involve localized macromolecular complexes that spatially regulate plant cell functions.

Purpose of the Study:

• To discuss the role of the cytoskeleton, plasma membrane, and targeted secretion in spatial regulation of plant cell morphogenesis.
• To propose a general model for morphogenesis in higher plant cells based on established principles.
• To illustrate mechanisms directing asymmetric division and differential daughter cell fates.

Main Methods:

• Review of recent results from model organisms, including brown algal zygotes (Fucus).
• Analysis of the establishment of stable cortical asymmetry in Fucus.
• Synthesis of current knowledge and principles to develop a general model.

Main Results:

• Cortical domains provide spatial control for cell expansion and division.
• Targeted secretion to the cell wall is important for spatial regulation.
• A model emphasizing cortical sites and targeted secretion was proposed for higher plant morphogenesis.

Conclusions:

• Cortical domains and targeted secretion are key to plant morphogenesis.
• The proposed model explains the orientation of asymmetric divisions and differential cell fates.
• Understanding these mechanisms is vital for plant development research.