Elicitor and suppressor of pisatin induction in spore germination fluid of pea pathogen, Mycosphaerella pinodes.

• DOI: 10.3186/jjphytopath.44.659
• Publication Date: 2011-09-13T05:23:50Z
• Authors: Tomonori SHIRAISHI; Hachiro OKU; Masao YAMASHITA; Seiji OUCHI
• Keywords: Phytoalexin; Mycosphaerella; Spore germination

Both elicitor and suppressor of pisatin accumulation in pea leaves were found the pycnospore germination fluid Mycosphaerella pinodes, a pathogenic fungus plant. The was high, whereas low molecular weight substance. counteracted activity elicitor. Purification from fraction by gel filtration TLC gave two active components, F2 F5. These substances to be peptides because they showed positive color reaction with ninhydrin Lowry reagents. F5 inhibited induced inoculation non-pathogens, Erysiphe graminis hordei Stemphylium sarcinaeforme. stronger than F2. completely at concentration 50μg/ml, rendered accessible S.