บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Identification of phytopathogenic bacteria associated with a post-harvest disease of garlic cloves in relation to cell-wall-degrading enzymes.

Saleh, O. I.;

Egyptian Journal of Microbiology Year: 1995 Vol: 30 Issue: 1 Pages: 177-202 Ref: many ref.

1995

บทคัดย่อ

Identification of phytopathogenic bacteria associated with a post-harvest disease of garlic cloves in relation to cell-wall-degrading enzymes.

 

Bacterial isolates (5) were isolated from a soft rot of garlic cloves collected from different markets in El-Minia Governorate, Egypt. The bacteria caused soft rot of wounded cloves when inoculated into tissues. The isolates were compared for their degree of pathogenicity as well as for differences in the specific symptoms induced in the different hosts. Furthermore, new hosts for the isolated pathogens were recorded under experimental conditions. The isolated pathogenic bacteria were identified as Bacillus subtilis (3 isolates), B. pumilus (1 isolate) and B. coagulans (1 isolate). Furthermore, they proved active in degrading parenchymatous tissue of many tested plant organs. The extracts of experimentally diseased garlic cloves were active in pectinase (polygalacturonase) (at pH 5 and 8) and carboxymethyl cellulase (at pH 6). In contrast, no enzyme activities for the tested enzymes were detected in healthy tissues.