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Dry Root Rot Disease Assays in Chickpea: a Detailed Methodology
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Molecular and Physiological Alterations in Chickpea under Elevated CO2 Concentrations.

Paramita Palit1, Raju Ghosh1, Priya Tolani1

  • 1International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, India.

Plant & Cell Physiology
|June 6, 2020
PubMed
Summary
This summary is machine-generated.

This study reveals how chickpea plants respond to elevated carbon dioxide (CO2) levels, identifying key physiological and genetic changes. Understanding these responses is crucial for adapting crops to climate change scenarios.

Keywords:
Climate changeDifferentially expressed genesElevated CO2 concentrationRNA-SeqStress pathwaysTranscriptome

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Area of Science:

  • Plant science
  • Molecular biology
  • Climate change adaptation

Background:

  • Rising atmospheric carbon dioxide (CO2) concentrations pose challenges for agriculture.
  • Understanding plant responses to elevated CO2 is vital for food security.
  • Chickpea (Cicer arietinum) is a globally important legume crop.

Purpose of the Study:

  • To profile the global transcriptome of chickpea under elevated CO2.
  • To investigate the interplay between physiological and transcriptional changes.
  • To identify molecular mechanisms underlying chickpea's response to climate change.

Main Methods:

  • Two chickpea cultivars (JG 11, KAK 2) were grown in open top chambers under ambient (380 ppm) and elevated (550, 700 ppm) CO2 concentrations.
  • Physiological parameters (shoot/root length, nodulation, chlorophyll, nitrogen balance) were measured.
  • RNA-Sequencing (RNA-Seq) was performed on 12 tissues across growth stages, complemented by quantitative real-time PCR (qRT-PCR) for gene expression analysis.

Main Results:

  • Elevated CO2 significantly altered chickpea growth, nodulation, chlorophyll content, and nitrogen balance.
  • RNA-Seq identified 18,644 differentially expressed genes, including 9,687 transcription factors (TFs).
  • Differential gene expression, network alterations, and stress-responsive TF dynamics were observed in both cultivars, implicating 138 pathways in sugar/starch metabolism, chlorophyll, and secondary metabolite biosynthesis.

Conclusions:

  • Elevated CO2 triggers significant physiological and transcriptomic shifts in chickpea.
  • Transcription factors play a critical role in mediating chickpea's response to increased CO2.
  • The study elucidates complex molecular pathways involved in chickpea adaptation to changing atmospheric conditions.