ISHS Acta Horticulturae 513: XXV International Horticultural Congress, Part 3: Culture Techniques with Special Emphasis on Environmental Implications, Disease, Pest Control and Integrated Pest Strategies
BREEDING RESISTANCE IN APIUM GRAVEOLENS TO LIRIOMYZA TRIFOLII: ANTIBIOSIS AND LINEAR FURANOCOUMARIN CONTENT |
| Authors: | J.T. Trumble, M.M. Diawara, C.F. Quiros |
| Keywords: | Apium, Liriomyza, bergapten, celery, furanocoumarin, leafminer, plant resistance, psoralen, xanthotoxin |
| Abstract:
Apium graveolens L. (celery, var 'Conquistador'), A. chilense, 23 backcross accessions of A. graveolens x A. chilense, and two relatives were ewamined for resistance to a major pest of vegetable crops, Liriomyza trifolii (Burgess). All accessions were tested using a no-choice design in order to maximize feeding and oviposition. Resistance was evaluated by recording numbers of feeding/oviposition punctures, mines, pupae, and adults. Of these accessions, several appeared to have good-excellent leafminer resistance. Compared to all plants except the wild relatives, these plants had fewer feeding punctures and allowed significantly less survival during development. In order to document if the observed resistance was caused by the carcinogenic and mutagenic linear furanocoumarins, the amounts of psoralen, bergapten and xanthotoxin present in both leaves and petioles of each accession were quantified using high performance liquid chromatography. Results indicated that L. trifolii resistance was not due to these undesirable compounds, but some of the accessions were eliminated from further immediate consideration by unacceptably high concentrations. The implications for use in a breeding program for A. graveolens are discussed. | |
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