Potential of induced resistance in postharvest disease control of horticultural crops
C. Mahendranathan.
Journal of Plant Pathology Volume 90 (2, Supplement) August 2008, Book of Abstract, 9th International Congress of Plant Pathology, August 24-29, 2008 Torino,Italy,. 507 pages.
2008
บทคัดย่อ
Potential of induced resistance in postharvest disease control of horticultural crops
Diminished use of conventional fungicides due to pathogen resistance and general unacceptability in terms of public and environmental risk have favoured the introduction of integrated pest management (IPM) programmes. Induction of natural disease resistance (NDR) in harvested horticultural crops using physical, biological and/or chemical elicitors has recently received increasing attention, it being preferred as a disease management strategy. This study reviews the enhancement of inducible antifungal compounds and suppression of anthracnose diseases in aubergine through bio-elicitors. Experiments were conducted to examine the possibility of elicitation of host natural resistance in aubergine against anthracnose, a problem disease in the study area, using a relatively weaker pathogen in aubergine,Fusarium solani. The results showed that pre-inoculation withF. solanigave greater phytoalexin accumulation, sufficient to prevent lesion development byColletotrichum capsici, agent of aubergine anthracnose. Thus,F. solaniappears to be an effective elicitor of natural host resistance in aubergine. The mechanism of induction of this resistance after inoculation withF. solaniappears to be associated with phytoalexin accumulation. Purification of the phytoalexin using flash chromatography showed that the compound is lubimin.