Abstract 5167 from Intl. Bot. Congress 1999

ibclogo XVI International Botanical Congess

Abstract Number: 5167
Poster No. = 2118

ALPHA LINOLENIC ACID (ALA) PRODUCTS OF LIPOXYGENASE IN DEFENSE RESPONSES AGAINSTINFECTION IN POTATO TUBERS

P. Redanna, P.Srinivas Reddy and M.Gunasekaran^, * School of Life Sciences, University of Hyderabad, Hyderabad-500 046, India, ^Department of Biology, Fisk University, Nashville,TN-37208.

The expression of lipoxygenase (LOX) and its metabolites were analyzed in potato tubers in response to Rhizoctonia bataticola infection. Rhizoctonia infection in potato tubers induced LOX activity and the formation of 9-hydroperoxyoctadecatrienoic acid (9-HPOTrE). In the uninfected tubers, 9-hydroperoxy- octadecadienoic acid (9-HPODE) is the major product. As a result the relative ratio of HPODE to HPOTrE changed from 4:1 in uninfected to 1:4.5 in infected tubers. Since 9 HPOTrE showed potent antifungal effects it is suggested that LOX products of ALA may be involved in the potato tuber defense mechanism.

HTML-Version made 7. July 1999 by Kurt Stüber

ALPHA LINOLENIC ACID (ALA) PRODUCTS OF LIPOXYGENASE IN DEFENSE RESPONSES AGAINSTINFECTION IN POTATO TUBERS

P. Redanna*, P.Srinivas Reddy* and M.Gunasekaran^, * School of Life Sciences, University of Hyderabad, Hyderabad-500 046, India, ^Department of Biology, Fisk University, Nashville,TN-37208.

P. Redanna, P.Srinivas Reddy and M.Gunasekaran^, * School of Life Sciences, University of Hyderabad, Hyderabad-500 046, India, ^Department of Biology, Fisk University, Nashville,TN-37208.