Screening and identification of yeast strains from fruits and vegetables: Potential for biological control of postharvest chilli anthracnose (Colletotrichum capsici)

  • Chanchaichaovivat A
  • Ruenwongsa P
  • Panijpan B
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Abstract

Yeasts antagonistic to Colletotrichum capsici were isolated from Thai fruits and vegetables. Four antagonists (R13, R6, ER1, and L2) were found that inhibited C. capsici growth with biocontrol efficacies of 93.3%, 83.1%, 76.6%, and 66.4%, respectively. Identification by 26S rDNA, and ITS region sequence together with physiological and morphological characteristics, showed them to be Pichia guilliermondii, Candida musae, Issatchenkia orientalis, and Candida quercitrusa, in order of their efficacy. P. guilliermondii strain R13 showed efficacy in reducing disease incidence on C. capsici infected chilli fruits to as low as 6.5%. Lower disease incidence was observed at lower storage temperature. The application of P. guilliermondii is more effective for preserving chilli fruits than conventional preservation with chlorinated water. © 2007 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • Antagonist
  • Biocontrol
  • Chilli fruits
  • Colletotrichum capsici
  • Pichia guilliermondii
  • Postharvest
  • Yeast

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