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Characterization and quantification of peptaibol produced by novel Trichoderma spp: Harnessing their potential to

Vijayasanthi Kodakkal Valiyambath1,2, Titty Anna Thomas1, Priya George1

  • 1ICAR-Indian Institute of Spices Research, Marikunnu, Kozhikode, Kerala, 673012, India.

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|October 2, 2024
PubMed
Summary
This summary is machine-generated.

Certain Trichoderma species enhance black pepper plant growth and drought tolerance by boosting secondary metabolite production. These biocontrol agents stimulate antioxidative mechanisms and accumulate protective compounds under moisture stress.

Keywords:
Trichoderma spp.DroughtPeptaibolPhenolsProlineSecondary metabolites

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Area of Science:

  • Plant Pathology
  • Microbial Biotechnology
  • Agricultural Science

Background:

  • Trichoderma spp. are known for managing biotic plant stresses.
  • They can also mitigate abiotic stresses by enhancing plant defense mechanisms and secondary metabolite synthesis.

Purpose of the Study:

  • To optimize conditions for peptaibol production in novel Trichoderma spp.
  • To investigate the efficacy of selected Trichoderma isolates in improving black pepper growth and physio-biochemical responses under moisture stress.

Main Methods:

  • Screening of 51 Trichoderma isolates for tolerance to low moisture and high temperatures in vitro.
  • In vivo evaluation of promising isolates on black pepper plants under varying moisture levels (Field Capacity [FC]: 75%, 50%, 25%).
  • Quantification of secondary metabolites (proline, phenols, MDA, soluble proteins) and growth parameters.

Main Results:

  • Six Trichoderma isolates (T. asperellum, T. erinaceum, T. harzianum, T. lixii) demonstrated tolerance to drought and heat stress.
  • Inoculation with T. asperellum and T. harzianum significantly improved black pepper growth under moisture stress.
  • Trichoderma inoculation led to increased accumulation of proline, phenols, MDA, and soluble proteins in plants at lower moisture levels (50% and 25% FC).

Conclusions:

  • Trichoderma isolates, particularly T. harzianum and T. asperellum, enhance drought tolerance in black pepper.
  • Peptaibol production by Trichoderma may be crucial for their biocontrol efficacy.
  • These findings highlight the potential of specific Trichoderma strains for improving crop resilience to abiotic stresses.