Journal of Pest Science (2007) 80, 241-247

Frederico da Silva Fortunato, Maria Goreti de Almeida Oliveira, Maria Helena Nasser Brumano, Carlos Henrique Osório Silva, Raul Narciso Carvalho Guedes and Maurílio Alves Moreira (2007)
Lipoxygenase-induced defense of soybean varieties to the attack of the velvetbean caterpillar (Anticarsia gemmatalis Hübner)
Journal of Pest Science 80 (4), 241-247
Abstract: The genetic elimination of lipoxygenase isozymes (LOX) and the Kunitz trypsin inhibitor (KTI) from soybean seeds is a way to overcome the problems associated with the undesirable beany flavor of soybean products. Although the role of the lipoxygenases in higher plants has not yet been established conclusively, several studies have indicated the physiological relevance of the lipoxygenase pathway induction in plants under biotic and abiotic stress conditions. To elucidate the effect of seed lipoxygenase and KTI elimination on soybean defense against injury, a biochemical assessment of the lipoxygenase pathway in soybean leaves subjected to the attack of Anticarsia gemmatalis (Lepdoptera:Noctuidae) was carried out in a commercial cultivar and three lines derived from this cultivar, which differ on the presence and absence of LOX and the protease inhibitor KTI. The soybean plants responded to the attack of the insect via the LOX pathway, by increasing LOX activity and protease inhibition in their leaves. Since jasmonic acid seems to activate transcription of genes encoding for protease inhibitors, the soybean plant responded to the injury via the LOX pathway, preferentially producing jasmonate and protease inhibitors. There was no association between the lack of LOX and KTI from the seeds and the leaf defense against injury, indicating that the loss of the genes for both proteins from soybean seeds does not interfere with the plant ability to respond to the attack of A. gemmatalis via this pathway.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Maurílio Alves Moreira

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Anticarsia gemmatalis	Soybean (Glycine max)