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Related Experiment Video

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Author Spotlight: Soybean Hairy Root Transformation for the Analysis of Gene Function
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Soybean Cyst Nematodes Influence Aboveground Plant Volatile Signals Prior to Symptom Development.

Nasie Constantino1, Yeonyee Oh1, Erdem Şennik2

  • 1Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, United States.

Frontiers in Plant Science
|October 18, 2021
PubMed
Summary
This summary is machine-generated.

Soybean cyst nematode (SCN) infestation triggers changes in plant volatile organic compounds (VOCs) detectable before visible symptoms appear. These VOCs, released from foliage, offer potential for early SCN detection in soybean crops.

Keywords:
GC-MSVOCsearly disease detectionsoybeansoybean cyst nematode

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Area of Science:

  • Plant Pathology
  • Agricultural Entomology
  • Biochemistry

Background:

  • Soybean cyst nematode (SCN) is a major global threat to soybean production.
  • SCN infestation symptoms are often delayed, hindering early detection and management.
  • Limited research exists on above-ground volatile organic compounds (VOCs) in response to root damage.

Purpose of the Study:

  • To investigate the changes in foliar VOCs following SCN infestation in soybean plants.
  • To identify specific VOCs associated with SCN infestation before the onset of visible symptoms.
  • To explore the potential of VOCs as early diagnostic markers for SCN.

Main Methods:

  • Temporal analysis of VOCs from soybean foliage using gas chromatography-mass spectrometry (GC-MS).
  • Quantification and identification of Common Plant Volatiles (CPVs) released by SCN-infested and mock-infested plants.
  • Statistical analysis including hierarchical clustering and Principal Component Analysis (PCA) to differentiate infested from non-infested plants.

Main Results:

  • SCN infestation led to a significant increase in total CPVs after 7 days post-infestation (DAI), preceding visible stunting.
  • PCA effectively separated SCN-infested from mock-infested plants from 5 DAI onwards.
  • Specific VOCs, including Styrene and D-Limonene, were elevated in SCN-infested plants prior to symptom development.

Conclusions:

  • SCN infestation alters the profile of foliar VOCs in soybean plants.
  • Certain VOCs are released in detectable amounts before the development of above-ground disease symptoms.
  • Foliar VOCs show promise as non-invasive biomarkers for early SCN detection and management.