Antifungal onion

Lipid transfer proteins, a family of homologous antifungal peptides containing eight disulfide-linked cysteines produced by some plants. For example, onion seeds (Allium cepa. L) produce the lipid transfer peptide ACE-AMPi, which inhibited F. oxysporum [B. P. A. Cammune et al.. Plant Pathol. 1996, 109, 445]. 

Some of the most powerful traditional blends of spices are chili powder (capsicums, onion, paprika, garlic, cumin, oregano), five-spice powder (white or black pepper, cinnamon, anise, fennel, cloves), salsa (capsicums, onion, garlic, tomatoes, lime), and curry powder (tumeric [a potent antibacterial antifungal, antiparasitic, and antiviral herb], curry leaves [a potent antiamebic, antimalarial, and antidiarrheal herb], cumin, cardamom, ginger, mustard, coriander). 

Table I Antifungal activity to Fusarium oxysporum f. sp. lagenariae and affinity to welsh onion of Pseudomonas gladioli...

Bacteria number of isolate Antifungal activity 2 Affinity to welsh onion 3... 

Takahama, U. Hirota, S. (2000). Deglucosidation of quercetin glucosides to the aglycone and formation of antifungal agents by peroxidase-dependent oxidation of quercetin on browning of onion scales. Plant Cell Physiology, 41,1021-1029. 

---