บทคัดย่องานวิจัย

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Increasing celery resistance to pathogens during storage and reducing high-risk psoralen concentration by treatment with GA3.

Afek, U.; Aharoni, N.; Carmeli, S.;

Journal of the American Society for Horticultural Science Year: 1995 Vol: 120 Issue: 4 Pages: 562-565 Ref: 36 ref.

1995

บทคัดย่อ

Increasing celery resistance to pathogens during storage and reducing high-risk psoralen concentration by treatment with GA3.

 

Experiments were conducted to investigate whether (+)marmesin, the precursor of psoralens in celery, plays a major role in the resistance of celery to pathogens (Botrytis cinerea, Alternaria alternata and Sclerotinia sclerotiorum) and to determine whether GA3 increases resistance to decay by maintaining high levels of (+)marmesin. (+)Marmesin had at least 100 times greater antifungal activity in vitro than psoralens. After 1 month of storage at 2 deg C, the concn of total psoralens increased from 8 to 67 micro g/g FW, (+)marmesin decreased from 27 to 4 micro g/g FW and the incidence of decay increased from 0 to 34%. However, when celery was treated with GA3 prior to 1 month of storage at 2 deg , decay increased to only 7%, the concn of psoralens increased to 31 micro g/g FW, and the concn of (+)marmesin decreased to 13 micro g/g FW. It is concluded that GA3 retards celery decay during storage by slowing down the conversion of (+)marmesin to psoralens, thereby increasing the resistance to pathoge

ns during storage.