Abstract:
:Beet powdery mildew incited by Erysiphe betae is a serious foliar fungal disease of worldwide distribution causing losses of up to 30%. In the present work, we searched for resistance in a germplasm collection of 184 genotypes of Beta vulgaris including fodder (51 genotypes), garden (60 genotypes), leaf (51 genotypes), and sugar (22 genotypes) beet types. Resistant genotypes were identified in the four beet types under study. In addition, mechanisms underlying resistance were dissected through histological studies. These revealed different resistance mechanisms acting at different fungal developmental stages, i.e., penetration resistance, early and late cell death, or posthaustorial resistance. Most genotypes were able to hamper fungal development at several stages. The later are interesting for breeding aiming to resistance durability. Furthermore, characterization of defense mechanisms will be useful for further cellular and molecular studies to unravel the bases of resistance in this species.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Fernández-Aparicio M,Prats E,Emeran AA,Rubiales Ddoi
10.1094/PHYTO-99-4-0385subject
Has Abstractpub_date
2009-04-01 00:00:00pages
385-9issue
4eissn
0031-949Xissn
1943-7684journal_volume
99pub_type
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