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GmNAP1 is essential for trichome and leaf epidermal cell development in soybean.
Kuanqiang Tang1,2, Suxin Yang3, Xingxing Feng1,2
1Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Changchun, 130102, Jilin, China.
Plant Molecular Biology
|May 17, 2020
Summary
Two soybean mutants with altered trichomes were identified as loss-of-function mutations in the GmNAP1 gene. This gene regulates trichome development and impacts soybean plant height and seed size.
Area of Science:
- Plant genetics
- Molecular biology
- Agricultural science
Background:
- Soybean trichomes are crucial for biotic and abiotic stress resistance.
- Understanding trichome development is key to improving soybean agronomic traits.
Purpose of the Study:
- To identify the genetic basis of novel soybean distorted trichome mutants.
- To elucidate the function of the GmNAP1 gene in soybean development.
Main Methods:
- Map-based cloning and bulked segregant analysis were used to identify causative mutations.
- Ethyl methylsulfonate mutagenesis was employed to generate mutants.
- Analysis of spliceosome recognition sites and protein truncation.
Main Results:
- Two soybean mutants, Gmdtm1-1 and Gmdtm1-2, exhibited shorter trichomes and larger pavement cells.
- Mutations in Glyma.20G019300 (GmNAP1) were identified in both mutants, leading to truncated proteins.
- GmNAP1 regulates actin filament assembly and genetic information processing in trichome and pavement cell development.
Conclusions:
- Loss-of-function mutations in GmNAP1 cause distorted trichomes and affect soybean plant height and seed size.
- GmNAP1 is essential for normal trichome morphology, pavement cell ploidy, and overall soybean growth.
- This study highlights GmNAP1's significant role in soybean development and agronomic traits.
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