Sugar Tech

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Identification and Characterization of Differentially Expressed Proteins from Trichoderma harzianum During Interaction with Colletotrichum falcatum Causing Red Rot in Sugarcane

  • E. Elamathi
  • P. MalathiEmail author
  • R. Viswanathan
  • A. Ramesh Sundar
Research Article


In continuation of our earlier findings on suppression of C. falcatum by T. harzianum, the present study was attempted to characterize differentially expressed proteins from T. harzianum during its growth over C. falcatum metabolites. Proteomic analysis clearly indicated the degradation of C. falcatum proteins and expression of newer proteins by T. harzianum through SDS–PAGE. Two-Dimensional Electrophoresis (2-DE) of individual protein bands eluted from SDS–PAGE resulted in clear separation of 15 protein spots from 3 differentially expressed protein bands viz., DEPb1, DEPb2 and DEPb3. MALDI-TOF analysis of these proteins revealed that the identified 8 proteins were belonging to two functional categories viz., stress and defence (choline dehydrogenase, FKBP-type peptidyl-prolyl cis–trans isomerase, superoxide dismutase (Cu/Zn) and Hex1) and unknown function (Hypothetical proteins). The stress-related proteins were reported to be involved in biological suppression of various pathogens in other crops. In addition to this, 7 unknown function proteins expressed from T. harzianum during interaction with C. falcatum may play a major role in degradation of metabolites. Role of identified proteins was further confirmed during in-planta expression analysis by qRT-PCR, which showed the upregulation of selected proteins with distinct patterns at all the time interval during the tritrophic interaction of host, pathogen and antagonist and corresponding reduction in symptom production.


Sugarcane C. falcatum Trichoderma spp. Red rot Differentially expressed proteins 



The authors are grateful to the Director, ICAR-Sugarcane Breeding Institute for providing facilities and constant encouragement. The financial support received from Sugarcane Development Fund, Ministry of Consumer Affairs, Food & Public, New Delhi, is duly acknowledged.


This study was done as part of Sugar Development Fund, Ministry of Consumer Affairs, Food & Public, New Delhi (No. 6-7/2006-R&D/SDF/885).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Society for Sugar Research & Promotion 2019

Authors and Affiliations

  • E. Elamathi
    • 1
  • P. Malathi
    • 1
    Email author
  • R. Viswanathan
    • 1
  • A. Ramesh Sundar
    • 1
  1. 1.Plant Pathology Section, Crop Protection DivisionICAR-Sugarcane Breeding InstituteCoimbatoreIndia

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