Elicitation of 6-Methoxymellein in Carrot Leaves byCercospora carotae

✍ Scribed by Mercier, Julien; Kuć, Joseph

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 176 KB
• Volume: 73
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199701)73:1<60::aid-jsfa704>3.0.co;2-e

✦ Synopsis

The inoculation of carrot leaves with conidia of the fungus Cercospora carotae induced the accumulation of 6-methoxymellein in the leaf blade and petiole, but not the root, of susceptible carrot plants. Root slices directly inoculated with mycelium of C carotae also accumulated 6-methoxymellein. In leaves, the peak in 6-methoxymellein levels coincided with the appearance of the Ðrst lesions, 9 days after inoculation. After this point the compound started to degrade steadily. This phytoalexin could thus be a defence compound against foliar pathogens of carrot.