Abstract: The present invention relates to a VHH antibody that binds to at least one fungal species and to compositions containing the same. The VHH antibody of the current invention comprises a complementarity determining region 1 (CDR1) region having the amino acid sequence set out in SEQ ID NO: 3; a CDR2 region having the amino acid sequence set out in SEQ ID NO: 4; and a CDR3 region having the amino acid sequence set out in SEQ ID NO: 5. The invention also relates to use of the composition as an anti-fungal agent. The invention further relates to agrochemical compositions and methods of using the same. Additionally, the invention relates to a transgenic plant, plant part, seed, or plant cell. The invention further relates to polynucleotides encoding said VHH antibody. Finally, the invention relates to a method of manufacturing a variant VHH antibody.

Abstract: This disclosure relates to a transgenic plant or plant tissue or plant cell comprising at least one polynucleotide encoding a polypeptide comprising a variable domain of a heavy-chain antibody (VHH) specifically binding to a sphingolipid of a fungus. This disclosure further relates to a method for protecting at least part of a plant, plant tissue or plant cell from an infection with a plant pathogen, for inhibiting the growth of a plant pathogen on at least part of a plant, plant tissue or plant cell, or for increasing pathogen resistance of at least part of a plant, plant tissue or plant cell.