The present invention relates to the use of a protein having at least 70% sequence similarity with an amino acid sequence according to SEQ ID NO: 1, for the treatment of a plant, characterized in that the protein is provided as an autologous protein from Trichoderma longibrachiatum. The protein may be provided by Trichoderma longibrachiatum, in particular a Trichoderma longibrachiatum strain MK1 deposited as CBS137023 or in a composition comprising the protein. Further aspects of the invention relate to a method for producing the protein, a composition comprising the protein, seeds treated with the composition and methods for growing plants comprising treating plants with the protein.
