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Fine-Tuning Florigen Increases Field Yield Through Improving Photosynthesis in Soybean
Kun Xu1,2, Xiao-Mei Zhang1, Haifeng Chen3
1MOA Key Laboratory of Soybean Biology, National Key Facility of Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
Frontiers in Plant Science
|September 6, 2021
Summary
Researchers improved soybean yield by fine-tuning flowering activators. This strategy balances flowering time and crop maturity, offering a novel approach to enhance agricultural productivity and address global food demand.
Area of Science:
- Plant Molecular Biology
- Agricultural Science
- Genetics
Background:
- Global population growth necessitates increased crop yield.
- Flowering activators like florigen can enhance plant biomass but delay maturity, hindering agricultural application.
- Developing strategies to improve crop yield while maintaining timely maturity is crucial.
Purpose of the Study:
- To develop a strategy for significantly improving soybean yield using florigen.
- To identify soybean lines with enhanced yield through fine-tuning flowering activators.
- To elucidate the mechanism by which florigen impacts crop yield.
Main Methods:
- Screening of transgenic soybean lines with RNAi-silenced florigen homologs (Glycine-max-Flowering Locus T Like, GmFTL).
- Evaluation of GmFTL expression, flowering time, and yield in field trials across multiple locations and years.
- Investigating the regulatory role of GmFTL in photosynthesis.
Main Results:
- Identified a transgenic soybean line (GmFTL-RNAi#1) with minor changes in GmFTL expression and flowering time but a notable increase in yield.
- GmFTL-RNAi#1 demonstrated normal field maturity and significantly higher yield across diverse conditions.
- Discovered a novel mechanism where GmFTL negatively regulates photosynthesis, impacting crop yield.
Conclusions:
- Fine-tuning the expression of flowering activators like GmFTL can achieve a trade-off between flowering time and high crop yield.
- Florigen has a previously unknown role in negatively regulating photosynthesis.
- The RNAi-based strategy offers a promising approach to enhance soybean yield and potentially other crops.
