DA1 Protein Regulating Plant Seed and Organ Size
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current understanding of the molecular and genetic mechanisms controlling seed and organ size in plants is limited, despite their importance for agronomical and ecological traits, with few identified genes and their mechanisms remaining unclear.
Innovation Solution
Identification of a UIM and LIM domain-containing protein, DA1, which acts as a key regulator of seed and organ size by restricting proliferative growth duration, along with its allele da1-1 and interaction with EOD1/BB, providing insights into size control mechanisms and potential applications in crop yield improvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If mutant plants are used to identify regulators of organ size, then understanding of size control mechanisms is improved, but fertility is reduced
Solution Approach 1:
The patent uses DA1 as an intermediary regulator that mediates between cell proliferation signals and organ size determination. DA1 acts as a transcriptional co-regulator that integrates multiple signaling pathways (auxin, cytokinin, gibberellin) to control organ size without disrupting fundamental reproductive functions, unlike previous mutants that directly disrupted fertility-critical pathways
Solution Approach 2:
The invention achieves local quality by tissue-specific regulation of organ size through DA1. The da1-1 mutation specifically enlarges certain organs (flowers, siliques, leaves) while maintaining normal fertility, indicating that DA1 regulates size in a tissue-specific manner rather than globally affecting all plant functions including reproduction
2Loss of information
If gene function is reduced or abolished to study size control, then mechanism insight is gained, but synergistic enhancement requires multiple mutations increasing complexity
Solution Approach 1:
The patent segments the size control mechanism into distinct functional modules: DA1 as the primary transcriptional regulator, EOD1/BB as the ubiquitin ligase partner, and their interaction interface. This segmentation allows independent study and manipulation of each component, reducing the complexity of studying their combined function compared to analyzing the entire size control system as a single unit
Solution Approach 2:
The invention introduces YUC6 as an intermediary that links DA1 to auxin biosynthesis. This intermediary relationship creates a clear causal chain (DA1 → YUC6 → auxin → cell proliferation → organ size) that simplifies understanding of the complex genetic interactions compared to studying multiple parallel pathways simultaneously
Data Source
AI summary
This invention relates to the identification of a regulator protein (termed DA) which controls the size of plant seeds and organs in Arabidopsis and other plants. Manipulation of DA protein expression may useful, for example, in improving crop yield and increasing plant biomass.