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GmAIR12-5 governs soybean nodule development associated with phosphorus availability.
Yuxiu Qin1, Huaikang Ruan1, Kang Chen1
1Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Engineering Technology Research Center of Low Carbon Agricultural Green Inputs, South China Agricultural University, Guangzhou City, 510642, China.
GmAIR12-5 enhances soybean growth and nitrogen fixation under low phosphorus conditions. This gene promotes nodule development by reducing reactive oxygen species, improving plant adaptation to nutrient deficiency.
Area of Science:
- Plant Biology
- Molecular Biology
- Agricultural Science
Background:
- Low phosphorus bioavailability limits nitrogen fixation in legume nodules.
- The role of auxin-induced root 12 (AIR12) in nodule adaptation to phosphorus deficiency is unknown.
- Soybean nodule development is sensitive to phosphorus availability.
Purpose of the Study:
- To investigate the role of GmAIR12-5 in soybean nodule adaptation to phosphorus deficiency.
- To determine if GmAIR12-5 regulates nodule development and nutrient uptake under low phosphorus conditions.
Main Methods:
- Hydroponic experiment with soybean (Glycine max) under varying phosphorus levels.
- Phylogenetic analysis and expression pattern analysis of GmAIR12-5.
- Overexpression and suppression of GmAIR12-5 in soybean.
- Measurement of plant growth, nodule development, nitrogen and phosphorus content, and reactive oxygen species levels.
Main Results:
- Phosphorus deficiency restricted soybean growth and nodule development.
- Overexpression of GmAIR12-5 increased plant growth, nitrogen and phosphorus acquisition, and big nodule formation under low phosphorus.
- Suppression of GmAIR12-5 reduced plant growth and nutrient absorption.
- GmAIR12-5 overexpression down-regulated superoxide anion content and enhanced infected cell numbers under low phosphorus.
Conclusions:
- GmAIR12-5 plays a crucial role in soybean nodule development and adaptation to phosphorus deficiency.
- GmAIR12-5 promotes nodule development by mitigating reactive oxygen species accumulation.
- This study enhances understanding of AIR12 function in legume crops.
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