Daylight-Driven Rechargeable TiO2 Nanocatalysts Suppress Wheat Blast Caused by <i>Magnaporthe oryzae Triticum</i>

  • Nur Uddin Mahmud
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Dipali Rani Gupta
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Sanjoy Kumar Paul
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Moutoshi Chakraborty
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Md Shabab Mehebub
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Musrat Zahan Surovy
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • S M Fajle Rabby
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Abdullah Al Mahbub Rahat
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Paritosh Chandra Roy
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Hossain Sohrawardy
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh
  • Mohammed A Amin
    Department of Chemistry, College of Science, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia
  • Mostafa Kamal Masud
    Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, Brisbane, QLD 4072 , Australia
  • Yusuke Ide
    International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 , Japan
  • Yusuke Yamauchi
    Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, Brisbane, QLD 4072 , Australia
  • Md Shahriar Hossain
    Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, Brisbane, QLD 4072 , Australia
  • Tofazzal Islam
    Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 , Bangladesh

抄録

<jats:title>Abstract</jats:title> <jats:p>Wheat blast, caused by the Magnaporthe oryzae Triticum (MoT) pathotype, threatens wheat production in many countries, including Bangladesh. Traditional fungicides are ineffective in combating this pathogen, and no resistant wheat variety is available. This study investigated the mechanism of wheat blast suppression by a nanostructured TiO2 nanocatalyst (NC) that generates reactive oxygen species through a photocatalytic process under daylight settings. In the presence of sunlight, the NCs displayed a high antifungal activity against MoT in vitro (minimum inhibitory concentration - MIC 0.025 mg/ml), as well as suppressed conidial formation and mycelial growth of MoT. Moreover, the fungal biomass was drastically reduced at NC concentrations ≥0.5 mg/ml. In vivo seedling assays showed inhibition of wheat blast when wheat seedlings were artificially inoculated with conidia. Under daylight conditions, NCs at a concentration from 0.1 to 0.5 mg/ml can protect wheat plants from MoT likely by inducing oxidative stress in the pathogen. Field trials of TiO2 NCs prevented more than 90% of disease incidence, with optimum yields, at NC concentrations ≥0.5 mg/ml. These results indicate that daylight-driven rechargeable NCs effectively suppress MoT in vitro and control wheat blast in the field.</jats:p>

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