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Transcriptome analysis of sweet potato responses to potassium deficiency
Fang Wang1, Wen-Fang Tan2, Wei Song2
1Environment-friendly Crop Germplasm Innovation and Genetic Improvement Key Laboratory of Sichuan Province, Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu, 610066, Sichuan, China. wangfangsaas@126.com.
BMC Genomics
|September 15, 2022
Summary
Potassium deficiency significantly alters gene expression in sweet potato roots, revealing key genes for improving crop tolerance. This study identifies molecular mechanisms underlying low potassium stress responses in this vital crop.
Area of Science:
- Plant Science
- Molecular Biology
- Agricultural Science
Background:
- Potassium (K+) is an essential nutrient for plant growth, acting as a limiting factor.
- Sweet potato (Ipomoea batatas L.) is a globally important crop, sensitive to potassium levels.
- Understanding gene expression under low K+ is crucial for sweet potato production.
Purpose of the Study:
- To analyze transcriptomic profiles of sweet potato roots under low K+ conditions.
- To identify genes and molecular pathways affected by K+ deficiency.
- To provide insights into improving low K+ tolerance in sweet potato.
Main Methods:
- Transcriptome analysis of sweet potato roots with varying K+ levels.
- Identification and quantification of differentially expressed genes (DEGs).
- Validation of RNA-sequencing data using quantitative real-time PCR (qRT-PCR).
Main Results:
- 559 differentially expressed genes (DEGs) were identified, with 336 upregulated and 223 downregulated.
- DEGs are involved in transcriptional regulation, calcium binding, redox signaling, transport, and metabolism.
- Hormone-related genes (auxin, ethylene, jasmonic acid) showed significant responses to K+ deficiency.
Conclusions:
- Low K+ stress induces significant transcriptional changes in sweet potato.
- Kinases, transporters, transcription factors, and hormone-related genes play crucial roles in K+ deficiency response.
- Identified DEGs offer targets for genetic improvement of low K+ tolerance in sweet potato.
