The effects of spermidine biosynthetic inhibitor methyl bis-(guanylhydrazone) on spore germination,growth and ethylene production in Alternaria consortiale

The spermidine synthesis inhibitor methyl bis-(guanylhydrazone) was found to reduce spore germination, hyphal and mycelial growth in Alternaria consortiale. The addition of spermidine to the culture medium resulted in a promotion of growth. Methyl bis-guanylhydrazone and spermidine did not change ethylene production.The data suggest that spermidine plays a role in the development of Alternaria consortiale independent of ethylene.Abbreviations MGBG methyl bis-(guanylhydrazone) - SPD spermidine - ACC 1-aminocyclopropane-1-carboxylic acid - PDA potato dextrose agar