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Pak J Biol Sci

Title:		Mycelial Inhibition of Sclerotinia sclerotiorum by Trichoderma spp. Volatile Organic Compounds in Distinct Stages of Development
Author(s):		Rafael da Silva L; Pereira Costa Muniz PH; Henrique Silva Peixoto G; Goncalves Dias Luccas BE; Tavares da Silva JB; Marques de Mello SC;
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Journal Title:		Pak J Biol Sci
Year:		2021
Volume:		24
Issue:		4
Page Number:		527 - 536
DOI:		10.3923/pjbs.2021.527.536
ISSN/ISBN:		1812-5735 (Electronic) 1028-8880 (Linking)
Abstract:		"<b>Background and Objective:</b> Fungi of the genus <i>Trichoderma </i>have high versatility in the control of different plant diseases. Among the main mechanisms of action of these fungi against phytopathogenic fungi, the production of Volatile Organic Compounds (VOCs) is mentioned. These compounds are said to inhibit the mycelial growth of various fungal pathogens. The objective of this work was to evaluate the <i>in vitro</i> inhibition of the mycelial growth of <i>Sclerotinia sclerotiorum </i>by VOCs from six <i>Trichoderma </i>strains in different stages of development of the biocontrol agent. <b>Materials and Methods:</b> In this work, the <i>in vitro </i>evaluation of the mycelial growth of the phytopathogen <i>S. sclerotiorum </i>by VOCs from six <i>Trichoderma </i>strains was carried out: <i>T. koningiopsis </i>(CEN1386), <i>T. asperelloides </i>(CEN1397), <i>T. longibrachiatum </i>(CEN1399) <i>T. lentiforme </i>(CEN1416), <i>T</i>. <i>perbedyi</i> (CEN1389) and <i>T. azevedoi</i> (CEN1241). Observations were made at different stages of antagonist development: mycelial Growth Phase (GP), Sporulation Phase (SP) and paired with the Pathogen Phase (PP). Besides, the sporulation of the tested strains was quantified. <b>Conclusion:</b> In all experimental conditions, the VOCs produced by the CEN1241 strain showed a greater inhibitory effect, although the inhibition was less evident when the cultures of <i>S. sclerotiorum </i>were exposed in the GP phase of the antagonist. Greater sporulation was observed with <i>T. lentiforme</i> (CEN1416), a fact not related to a better ability to inhibit <i>S. sclerotiorum</i>, by VOCs"
Keywords:		Ascomycota/*drug effects/*growth & development/physiology Mycelium/*pathogenicity Trichoderma/*pathogenicity Volatile Organic Compounds/*adverse effects/metabolism Antagonism biological control dual culture plant disease secondary metabolites sporulation;
Notes:		"MedlineRafael da Silva, Lincon Pereira Costa Muniz, Paulo Henrique Henrique Silva Peixoto, Gustavo Goncalves Dias Luccas, Bruna Eliza Tavares da Silva, Joao Batista Marques de Mello, Sueli Correa eng Pakistan 2021/09/07 Pak J Biol Sci. 2021 Jan; 24(4):527-536. doi: 10.3923/pjbs.2021.527.536"