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Plant Physiol

Title:		"Interactive effects of jasmonic acid, salicylic acid, and gibberellin on induction of trichomes in Arabidopsis"
Author(s):		Traw MB; Bergelson J;
Address:		"Department of Ecology and Evolution, University of Chicago, 1101 E. 57th Street, Chicago, Illinois 60637, USA"
Journal Title:		Plant Physiol
Year:		2003
Volume:		20031009
Issue:		3
Page Number:		1367 - 1375
DOI:		10.1104/pp.103.027086
ISSN/ISBN:		0032-0889 (Print) 1532-2548 (Electronic) 0032-0889 (Linking)
Abstract:		"Leaf trichomes protect plants from attack by insect herbivores and are often induced following damage. Hormonal regulation of this plant induction response has not been previously studied. In a series of experiments, we addressed the effects of artificial damage, jasmonic acid, salicylic acid, and gibberellin on induction of trichomes in Arabidopsis. Artificial damage and jasmonic acid caused significant increases in trichome production of leaves. The jar1-1 mutant exhibited normal trichome induction following treatment with jasmonic acid, suggesting that adenylation of jasmonic acid is not necessary. Salicylic acid had a negative effect on trichome production and consistently reduced the effect of jasmonic acid, suggesting negative cross-talk between the jasmonate and salicylate-dependent defense pathways. Interestingly, the effect of salicylic acid persisted in the nim1-1 mutant, suggesting that the Npr1/Nim1 gene is not downstream of salicylic acid in the negative regulation of trichome production. Last, we found that gibberellin and jasmonic acid had a synergistic effect on the induction of trichomes, suggesting important interactions between these two compounds"
Keywords:		"Arabidopsis/drug effects/genetics/*growth & development Cell Surface Extensions/drug effects/*physiology Cyclopentanes/pharmacology Dose-Response Relationship, Drug Drug Interactions Gibberellins/pharmacology Mutation Oxylipins Plant Epidermis/drug effect;"
Notes:		"MedlineTraw, M Brian Bergelson, Joy eng GM 62504/GM/NIGMS NIH HHS/ Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. 2003/10/11 Plant Physiol. 2003 Nov; 133(3):1367-75. doi: 10.1104/pp.103.027086. Epub 2003 Oct 9"