Abstract
Radicle growth of germinated seed of the root parasite O. ramosa is shown to be rapidly accompanied by secretion of proteins including pectinolytic enzymes, polygalacturonase and rhamnogalacturonase. These secretions peaked between 4 to 8 d after induction of germination and remained constant for some further days in the case of polygalacturonases. After 6 d, germinated seeds secreted proteins which exhibit peroxidase activity. The latter may be correlated with expression of OrPOX1, a putative gene encoding for secreted peroxidase. The involvement of these enzymes in host root attack and haustorium formation by the parasite is discussed.
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Abbreviations
- PG:
-
polygalacturonase
- POX:
-
peroxidase
- RG:
-
rhamnogalacturonase
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Veronesi, C., Bonnin, E., Calvez, S. et al. Activity of secreted cell wall-modifying enzymes and expression of peroxidase-encoding gene following germination of Orobanche ramosa . Biol Plant 51, 391–394 (2007). https://doi.org/10.1007/s10535-007-0084-y
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DOI: https://doi.org/10.1007/s10535-007-0084-y