Plant environmental sensing relies on specialized plastids

Area of Science:

• Plant biology
• Cell biology
• Organelle biology

Background:

• Plastids are versatile organelles in plants, adapting to diverse roles like photosynthesis, storage, and pigment synthesis.
• Post-endosymbiotic evolution has driven plastid specialization, aligning organelle function with cellular processes and environmental responses.
• Understanding plastid diversification is key to comprehending plant adaptation and development.

Approach:

• This review synthesizes existing literature on plastid biology.
• It incorporates recent findings on specialized plastids involved in sensing and signaling.
• The focus is on identifying common features and functions across different plastid types.

Key Points:

• Plastids exhibit remarkable functional diversification, adapting to specific cellular needs.
• A class of 'sensory plastids' specialized for stress sensing and signaling is emerging.
• Epidermal and vascular parenchyma plastids share characteristics facilitating environmental sensing and signaling.

Conclusions:

• Plastid functional diversification is a significant aspect of plant adaptation.
• The concept of 'sensory plastids' offers a new perspective on organelle roles.
• These findings may fundamentally alter our understanding of plastid biology and plant signaling.