Evolution of DELLA function and signaling in land plants

Area of Science:

• Plant Biology
• Evolutionary Biology
• Molecular Biology

Background:

• DELLA proteins are key repressors of gibberellin (GA) signaling, crucial for plant growth.
• Their manipulation was vital for the Green Revolution, significantly increasing crop yields.
• The evolutionary history of DELLA function and signaling remains largely unknown across land plants.

Purpose of the Study:

• To review current knowledge on DELLA protein function, including structure, modifications, targets, and interactions.
• To discuss the evolution of DELLA signaling in land plants, with a focus on bryophytes.
• To identify future research directions for understanding DELLA evolution.

Main Methods:

• Literature review of existing research on DELLA proteins.
• Analysis of evolutionary findings related to DELLA signaling pathways.
• Identification of knowledge gaps and future research opportunities.

Main Results:

• DELLA proteins' roles in growth regulation and GA signaling are well-established.
• Evolutionary insights into DELLA signaling are emerging, particularly from studies on early land plants.
• Further research is needed to fully elucidate the evolutionary trajectory of DELLA mechanisms.

Conclusions:

• Understanding DELLA evolution is critical for crop improvement.
• Investigating DELLA signaling in bryophytes offers insights into early land plant evolution.
• This knowledge can contribute to developing climate-resilient crops and ensuring global food security.