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Plant Signal Behav

Title:		A role for 9-lipoxygenases in maize defense against insect herbivory
Author(s):		Woldemariam MG; Ahern K; Jander G; Tzin V;
Address:		"a Biology Department , School of Science, The College of New Jersey , Ewing Township , NJ , USA. b Boyce Thompson Institute , Ithaca , NY , USA. c Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev , Sede Boqer , Israel"
Journal Title:		Plant Signal Behav
Year:		2018
Volume:		20180117
Issue:		1
Page Number:		e1422462 -
DOI:		10.1080/15592324.2017.1422462
ISSN/ISBN:		1559-2324 (Electronic) 1559-2316 (Print) 1559-2316 (Linking)
Abstract:		"Feeding by Spodoptera exigua (beet armyworm) larvae on Zea mays (maize) induces expression of 9-lipoxygenases to a greater extent than 13-lipoxygenases. Whereas 13-lipoxygenases have an established role in the synthesis of jasmonates that serve as defense signaling molecules in many plant species, relatively little is known about the role of 9-lipoxygenases in herbivore defense. Phylogenetic analysis of lipoxygenases from maize inbred lines B73 and W22 shows that, although most Lox genes are present in both lines, Lox12, a 9-lipoxygenase that has been implicated in fungal defense, is truncated and unlikely to encode a functional protein in W22. Two independent Mutator transposon insertions in another 9-lipoxygenase, Lox4, caused improved S. exigua growth on the mutant lines relative to wildtype W22. This observation suggests a function in herbivore defense for metabolic products downstream of maize Lox4, either through direct toxicity or a perhaps an as yet unknown signaling function"
Keywords:		"Animals Herbivory/*physiology Larva/physiology Lipoxygenase/metabolism Lipoxygenases/*metabolism Mutagenesis, Insertional Phylogeny Spodoptera/*physiology Zea mays/*enzymology/*parasitology Maize defense insect jasmonate lipoxygenase;"
Notes:		"MedlineWoldemariam, Melkamu G Ahern, Kevin Jander, Georg Tzin, Vered eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2018/01/03 Plant Signal Behav. 2018 Jan 2; 13(1):e1422462. doi: 10.1080/15592324.2017.1422462. Epub 2018 Jan 17"