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Related Concept Videos

Microbe-Plant Interactions01:09

Microbe-Plant Interactions

Microbe-plant interactions represent a dynamic spectrum of associations shaped by intricate chemical signaling. These interactions can be neutral, beneficial, or detrimental, and profoundly influence plant physiology, growth, and ecosystem function. The plant microbiome, comprising bacteria, fungi, archaea, protists, and viruses, plays a pivotal role in mediating these effects through surface colonization, internal colonization, or systemic symbiosis.Mutualistic associations, particularly with...

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Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products
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Isolation and Characterization of Trichoderma spp. for Antagonistic Activity Against Root Rot and Foliar Pathogens.

Krishna Kumar1, N Amaresan, S Bhagat

  • 1Division of Field Crops, Central Agricultural Research Institute, Port Blair, 744 105 Andaman and Nicobar Islands India.

Indian Journal of Microbiology
|June 5, 2013
PubMed
Summary

This study characterized Trichoderma fungal isolates from South Andaman for their ability to combat plant pathogens. Certain isolates demonstrated significant antagonistic activity and enzyme production, highlighting their potential as biocontrol agents.

Keywords:
Andaman and Nicobar IslandsBiocontrolSpiceTrichoderma

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Published on: September 28, 2021

Area of Science:

  • Agricultural Science
  • Mycology
  • Plant Pathology

Background:

  • Trichoderma are filamentous fungi known for parasitizing plant pathogenic fungi.
  • Effective biocontrol agents are crucial for sustainable agriculture.

Purpose of the Study:

  • To characterize Trichoderma isolates from South Andaman.
  • To evaluate their antagonistic potential against plant pathogens.
  • To assess their enzymatic activities.

Main Methods:

  • Isolation and characterization of twelve Trichoderma spp. from South Andaman.
  • Cultural and morphological analysis.
  • Antagonistic assays against Sclerotium rolfsii, Colletotrichum gloeosporioides, and C. capsici.
  • DNA sequencing for species identification.
  • Enzyme activity assays for chitinase and β-1,3-glucanase.

Main Results:

  • Seven different Trichoderma species were identified among the twelve isolates.
  • Isolates showed varied efficacy against tested pathogens.
  • Isolates TND1, TWN1, TWC1, TGD1, and TSD1 exhibited the highest inhibition of mycelial growth.
  • All isolates displayed significant chitinase and β-1,3-glucanase activities.
  • Trichoderma viride had the highest chitinase activity, while Trichoderma harzianum showed the highest β-1,3-glucanase activity.

Conclusions:

  • Trichoderma isolates from South Andaman possess significant potential as biocontrol agents.
  • Specific isolates demonstrate superior antagonistic capabilities and enzyme production.
  • Enzyme activities (chitinase and β-1,3-glucanase) contribute to the biocontrol efficacy of Trichoderma.