Comparative abilities of fungi pathogenic and nonpathogenic to bean (Phaseolus vulgaris) to metabolize phaseollin |
| |
| Authors: | J Van den Heuvel Judy A Glazener |
| |
| Institution: | 1. Phytopathological Laboratory ‘Willie Commelin Scholten’, Javalaan 20, Baarn, the Netherlands
|
| |
| Abstract: | The abilities of fungi pathogenic and nonpathogenic to bean (Phaseolus vulgaris) to metabolize the phytoalexin phaseollin were compared when grown in shake cultures containing 12 to 15 μg phaseollin/ml. Under these conditions phaseollin was metabolized by five out of seven pathogens and by three out of five nonpathogens. Disappearance of phaseollin was accompanied by the appearance of metabolic products in cultures ofFusarium solani f. sp.phaseoli, Colletotrichum lindemuthianum, Botrytis cinerea andCladosporium herbarum. The nonpathogenC. herbarum detoxified phaseollin to 1a-hydroxyphaseollone as rapidly as the pathogenF. solani f.sp.phaseoli. Phaseollin was converted to 6a-hydroxyphaseollin by the pathogensB. cinerea andC. lindemuthianum, and this product was further metabolized by the latter fungus. 6a-Hydroxyphaseollin was less fungitoxic toB. cinerea. C. lindemuthianum was equally sensitive to both compounds. Phaseollin was not metabolized by the pathogensFusarium oxysporum f. sp.phaseoli andThielaviopsis basicola. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
