COP1-Mediated Degradation of BBX22/LZF1 Optimizes Seedling Development in Arabidopsis

BBX22 protein has a short half-life and is crucial for optimal growth in varying light conditions.

• Light influences the growth and development of plants through changes in gene expression.
• The 26S proteasome plays a role in regulating proteins that affect plant growth under different light conditions.
• BBX22 acts as a positive regulator during the transition from dark to light growth phases in Arabidopsis.
• BBX22 protein expression is tightly controlled and accumulates more under short-day conditions to inhibit hypocotyl elongation.
• The degradation of BBX22 is mediated by COP1 in the dark and involves HY5 under light conditions.
• The accumulation of BBX22 is critical for plants to adapt to changes in day length and maintain optimal growth.

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