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Obtaining High-Quality Transcriptome Data from Cereal Seeds by a Modified Method for Gene Expression Profiling
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Transcriptome response to nitrogen starvation in rice.

Hongmei Cai1, Yongen Lu, Weibo Xie

  • 1National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Wuhan, China.

Journal of Biosciences
|August 28, 2012
PubMed
Summary
This summary is machine-generated.

Nitrogen starvation significantly alters rice gene expression, impacting numerous metabolic pathways and revealing conserved stress responses across plants. This study highlights key microRNAs involved in nutrient balance.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Genomics

Background:

  • Nitrogen is crucial for plant growth and development.
  • Nitrogen deficiency induces significant physiological and biochemical alterations in plants.

Purpose of the Study:

  • To analyze the dynamic changes in the rice transcriptome under nitrogen starvation.
  • To identify conserved nitrogen stress response mechanisms in plants.

Main Methods:

  • Utilized Affymetrix GeneChip rice genome arrays to profile gene expression.
  • Performed comparative analysis between rice and Arabidopsis transcriptomes.
  • Analyzed microRNA transcription profiles under nitrogen starvation.

Main Results:

  • Nitrogen starvation affected 3518 genes (10.88% of the genome), with transient changes in metabolic pathways.
  • 462 transcripts (13.1%) showed similar expression patterns in both root and shoot.
  • Identified 73 orthologous groups responding to nitrogen starvation between rice and Arabidopsis.
  • Observed differential expression of miR399 and miR530 under nitrogen starvation.

Conclusions:

  • Nitrogen starvation profoundly impacts the rice transcriptome, affecting diverse cellular processes.
  • A conserved mechanism for nitrogen stress response exists across plant species.
  • Specific microRNAs, like miR399 and miR530, may play roles in plant nutrient homeostasis.