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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zappacosta, D. Delhey, R. Curvetto, N. |
| Copyright Year | 2003 |
| Abstract | Growth and activities of peroxidases, chitinases and glucanases were studied in order to evaluate the response of calli and roots of pink root-susceptible Allium cepa cvs. Valcatorce and T-412 and resistant A. fistulosum cv. Nogiwa Negi, to sterile culture filtrates of Phoma terrestris. Untreated calli and roots of A. fistulosum exhibited higher activity of peroxidases and glucanases than that of Valcatorce and T-412. Enzyme activities and growth of roots and calli were not affected in filtrate-treated A. fistulosum. The growth of calli and roots of A. cepa cultivars decreased significantly after exposure to P. terrestris filtrates while the peroxidase and glucanase activities increased. Peroxidase and glucanase activities were also enhanced in roots of Valcatorce bulbs grown in P. terrestris-inoculated soil as compared to healthy control plants. We conclude that a high constitutive activity of glucanases and perhaps chitinases might account for the resistance of A. fistulosum. The differential reaction (with respect to root growth) of pink root-susceptible and resistant materials to culture filtrates indicates that this in vitro-system might be useful for the screening of onion breeding lines. |
| Starting Page | 101 |
| Ending Page | 105 |
| Page Count | 5 |
| File Format | |
| ISSN | 00063134 |
| Journal | Biologia Plantarum |
| Volume Number | 46 |
| Issue Number | 1 |
| e-ISSN | 15738264 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2003-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Horticulture |
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